PNPT1

gene
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Also known as PNPaseOLD35old-35

Summary

PNPT1 (polyribonucleotide nucleotidyltransferase 1, HGNC:23166) is a protein-coding gene on chromosome 2p16.1, encoding Polyribonucleotide nucleotidyltransferase 1, mitochondrial (Q8TCS8). RNA-binding protein implicated in numerous RNA metabolic processes. It is a selective cancer dependency (DepMap: 89.1% of cell lines).

The protein encoded by this gene belongs to the evolutionary conserved polynucleotide phosphorylase family comprised of phosphate dependent 3’-to-5’ exoribonucleases implicated in RNA processing and degradation. This enzyme is predominantly localized in the mitochondrial intermembrane space and is involved in import of RNA to mitochondria. Mutations in this gene have been associated with combined oxidative phosphorylation deficiency-13 and autosomal recessive nonsyndromic deafness-70. Related pseudogenes are found on chromosomes 3 and 7.

Source: NCBI Gene 87178 — RefSeq curated summary.

At a glance

  • Gene–disease (curated): hearing loss disorder (Definitive, GenCC) — +5 more curated relationships
  • GWAS associations: 43
  • Clinical variants (ClinVar): 978 total — 37 pathogenic, 31 likely-pathogenic
  • Phenotypes (HPO): 80
  • Cancer dependency (DepMap): dependent in 89.1% of screened cell lines
  • MANE Select transcript: NM_033109

Identifiers

Gene identifiers

FieldValue
HGNC IDHGNC:23166
Approved symbolPNPT1
Namepolyribonucleotide nucleotidyltransferase 1
Location2p16.1
Locus typegene with protein product
StatusApproved
AliasesPNPase, OLD35, old-35
Ensembl geneENSG00000138035
Ensembl biotypeprotein_coding
OMIM610316
Entrez87178

Gene structure

Transcript identifiers

Ensembl transcripts: 24 — 19 protein_coding, 4 nonsense_mediated_decay, 1 retained_intron

ENST00000260604, ENST00000415374, ENST00000415489, ENST00000429805, ENST00000447944, ENST00000481066, ENST00000625249, ENST00000867132, ENST00000867134, ENST00000867135, ENST00000867136, ENST00000867137, ENST00000867138, ENST00000917022, ENST00000917023, ENST00000917024, ENST00000917025, ENST00000917026, ENST00000917027, ENST00000949800, ENST00000949801, ENST00000949802, ENST00000949803, ENST00000949804

RefSeq mRNA: 1 — MANE Select: NM_033109 NM_033109

CCDS: CCDS1856

Canonical transcript exons

ENST00000447944 — 28 exons

ExonStartEnd
ENSE000009627905568637055686444
ENSE000011464795568764555687705
ENSE000019296555569366355693844
ENSE000019354715563406155636392
ENSE000034692825563755255637599
ENSE000034885705568378555683834
ENSE000035036815564734755647453
ENSE000035138365566195655662026
ENSE000035285615564062755640705
ENSE000035315495567289355673079
ENSE000035317345564463755644720
ENSE000035431795564331955643425
ENSE000035467565567968255679795
ENSE000035478845568494355685048
ENSE000035627465565490055654953
ENSE000035712475566699155667093
ENSE000035722905566786255667958
ENSE000035742525568071255680759
ENSE000035762605567131955671376
ENSE000036203865568085555680918
ENSE000036249915565613155656220
ENSE000036298205564534955645432
ENSE000036327655564641555646486
ENSE000036575445564625955646322
ENSE000036594535566015755660193
ENSE000036691075567199555672046
ENSE000036764955564315855643213
ENSE000036896655565630555656371

Expression profiles

Bgee: expression breadth ubiquitous, 258 present calls, max score 96.86.

FANTOM5 (CAGE): breadth ubiquitous, TPM avg 27.3940 / max 1113.4826, expressed in 1810 samples.

FANTOM5 promoters (1 alternative TSS)

Promoter IDTPM avgSamples expressed
2848227.39401810

Top tissues by expression

259 total, by Bgee expression score (0-100, higher = more expressed):

TissueAnatomy IDExpression scoreQuality
left ventricle myocardiumUBERON:000656696.86gold quality
secondary oocyteCL:000065596.15gold quality
tibialis anteriorUBERON:000138595.65gold quality
deltoidUBERON:000147695.30gold quality
oocyteCL:000002395.06gold quality
corpus callosumUBERON:000233693.15gold quality
myocardiumUBERON:000234992.77gold quality
subthalamic nucleusUBERON:000190692.52gold quality
biceps brachiiUBERON:000150792.38gold quality
quadriceps femorisUBERON:000137792.30gold quality
cardiac muscle of right atriumUBERON:000337992.08gold quality
skeletal muscle tissue of biceps brachiiUBERON:000450292.03gold quality
heart right ventricleUBERON:000208091.74gold quality
vastus lateralisUBERON:000137991.72gold quality
inferior vagus X ganglionUBERON:000536391.66gold quality
skeletal muscle tissueUBERON:000113491.56gold quality
epithelial cell of pancreasCL:000008391.42gold quality
muscle tissueUBERON:000238590.92gold quality
dorsal plus ventral thalamusUBERON:000189790.83gold quality
substantia nigra pars reticulataUBERON:000196690.81gold quality
skeletal muscle tissue of rectus abdominisUBERON:000451190.75gold quality
Brodmann (1909) area 46UBERON:000648390.63gold quality
substantia nigra pars compactaUBERON:000196590.25gold quality
kidney epitheliumUBERON:000481990.12gold quality
lateral nuclear group of thalamusUBERON:000273690.10gold quality
lateral globus pallidusUBERON:000247689.91gold quality
C1 segment of cervical spinal cordUBERON:000646989.69gold quality
skeletal muscle organUBERON:001489289.64gold quality
spinal cordUBERON:000224089.56gold quality
spermCL:000001989.53gold quality

Single-cell (SCXA)

Detected in 15 experiment(s), a significant marker in 12.

ExperimentMarker?Max mean expression
E-CURD-88yes3286.33
E-MTAB-9435yes2702.85
E-MTAB-6701yes2114.29
E-CURD-79yes1899.69
E-MTAB-6308yes1793.98
E-HCAD-9yes1227.43
E-MTAB-8142yes109.65
E-HCAD-1yes39.04
E-GEOD-137537yes17.12
E-HCAD-10yes8.78
E-MTAB-8410yes8.19
E-MTAB-7316no1259.63
E-HCAD-8no1205.97
E-MTAB-7037no470.04
E-ANND-3no0.00

Regulation

Is transcription factor: no

Upstream regulators (CollecTRI, top): ZNF331

miRNA regulators (miRDB)

89 targeting PNPT1, top 30 by miRDB confidence (max_score; target_count = how many genes the miRNA targets in total — lower means more specific):

miRNAMax scoreAvg scoremiRNA target_count
HSA-MIR-656-3P100.0072.152788
HSA-MIR-8485100.0077.574731
HSA-MIR-9-5P100.0072.282361
HSA-MIR-4425100.0067.591049
HSA-MIR-30A-5P100.0076.313233
HSA-MIR-30B-5P100.0076.293248
HSA-MIR-30C-5P100.0076.293248
HSA-MIR-30D-5P100.0076.323233
HSA-MIR-30E-5P100.0076.323242
HSA-MIR-513A-5P100.0069.772465
HSA-MIR-607799.9968.042299
HSA-MIR-548C-3P99.9974.017587
HSA-MIR-428299.9975.366408
HSA-MIR-520D-5P99.9873.344883
HSA-MIR-524-5P99.9873.434882
HSA-MIR-50799.9770.111915
HSA-MIR-55799.9670.011640
HSA-MIR-1250-3P99.9670.044038
HSA-MIR-6778-3P99.9667.292693
HSA-MIR-4666A-3P99.9671.713434
HSA-MIR-9983-3P99.9471.483631
HSA-MIR-335-3P99.9373.364958
HSA-MIR-205-3P99.9269.923165
HSA-MIR-10527-5P99.9172.283754
HSA-MIR-7-1-3P99.9171.534384
HSA-MIR-7-2-3P99.9171.404394
HSA-MIR-6809-3P99.9171.453814
HSA-MIR-329-3P99.9166.561234
HSA-MIR-362-3P99.9166.381267
HSA-MIR-4753-3P99.9071.033786

Functional genomics

DepMap (CRISPR cell-line fitness): dependent in 89.1% of screened cell lines.

Literature-anchored findings (GeneRIF, showing 40)

  • Protein-protein interactions between human exosome components support the assembly of RNase PH-type subunits into a six-membered PNPase-like ring (PMID:12419256)
  • an important role for hPNPase(old-35)in growth control associated with terminal differentiation and cellular senescence. (PMID:12473748)
  • the molecular mechanism of the growth-arresting property of hPNPaseold-35 (PMID:12721301)
  • demonstrate that the hPNPase is localized in mitochondria; finding suggests the involvement of mitochondrial RNA metabolism in cellular senescence (PMID:12798676)
  • analysis of domains of human polynucleotide phosphorylase (hPNPaseOLD-35) mediating cellular senescence (PMID:16055741)
  • Targeted overexpression of hPNPase(old-35) might be a novel therapeutic strategy for c-myc-overexpressing and IFN-resistant tumors, such as melanomas. (PMID:16410805)
  • human PNPase mRNA upregulation by beta-interferon has no effect on protein level in melanoma cell lines (PMID:16505900)
  • PNPase localization to the mitochondrial intermembrane space suggests a unique role distinct from its highly conserved function in RNA processing in chloroplasts and bacteria. (PMID:16966379)
  • Combined, the data demonstrate an unexpected IMS localization and a key role for PNPase in maintaining mitochondrial homeostasis. (PMID:16966381)
  • A novel pathway by which an evolutionary conserved RNA-metabolizing enzyme, hPNPase(old-35), regulates cell growth and viability. (PMID:17804700)
  • recent advances in understanding the various roles of hPNPase both within and potentially outside of the mitochondria [review] (PMID:17983748)
  • In this work, the degradation, polymerization, and RNA-binding properties of the human PNPase were analyzed and compared to its bacterial and organellar counterparts. (PMID:18083836)
  • Involvement of human polynucleotide phosphorylase in mtRNA degradation was studied. (PMID:18083837)
  • The complex of hSUV3-hPNPase is an integral entity for efficient degradation of structured RNA and may be the long sought RNA-degrading complex in the mammalian mitochondria. (PMID:19509288)
  • maintained expression and even up-regulation of some (PNPT1, PMPCB, HMMR/RHAMM, BSG and ERCC1) tumor associated antigens in CD40-activated leukemic cells. (PMID:19580345)
  • Inhibition of PNPase by shRNA or stable overexpression of miR-221 protected melanoma cells from IFN-beta-mediated growth inhibition, accentuating the importance of PNPase induction and miR-221 down-regulation in mediating IFN-beta action. (PMID:20547861)
  • The data support an unanticipated role for PNPASE in mediating the translocation of RNAs into mitochondria. (PMID:20691904)
  • targeted overexpression of hPNPase(old-35) represents a novel strategy to selectively downregulate RNA expression and consequently intervene in a variety of pathophysiological conditions (PMID:21151174)
  • The study provides structural and functional insights into hPNPase, which uses a KH pore to trap a long RNA 3’ tail that is further delivered into an RNase PH channel for the degradation process. (PMID:22210891)
  • a novel role of nEGFR in radioresistance, and that is, upon ionizing radiation, nEGFR inactivates the ribonuclease activity of PNPase toward c-MYC mRNA through DNAPK-mediated Ser-776 phosphorylation (PMID:22815474)
  • A mutation in PNPT1, encoding mitochondrial-RNA-import protein PNPase, causes hereditary hearing loss. (PMID:23084290)
  • Mutation in PNPT1, which encodes a polyribonucleotide nucleotidyltransferase, impairs RNA import into mitochondria and causes respiratory-chain deficiency. (PMID:23084291)
  • Interaction between PNPase and hSuv3 is essential for efficient mitochondrial RNA degradation. (PMID:23221631)
  • fresh insight into cellular pathways regulated by PNPT1 (PMID:24143183)
  • this study provides further evidence that hPNPase(old-35) is associated with global changes in cell cycle-associated genes and identifies potential gene targets for future investigation (PMID:24729470)
  • In vitro rescue experiments, using exogenous expression of wild-type PNPT1 in patient fibroblasts, ameliorated the deficiencies in the OXPHOS complex protein expression, supporting the likely pathogenicity of these variants and the importance of Whole-exome sequencingin efficiently identifying rare genetic disease genes (PMID:27759031)
  • Inhibition of homologous PNPase by citrate may represent an evolutionarily conserved communicative link between RNA degradation and central metabolism. (PMID:28334892)
  • Our cases expand the phenotypic spectrum of PNPT1 mutations that can cause delayed myelination. (PMID:28594066)
  • The PNPT1 p.Arg136His and p.Pro140Leu variants in our subject showed 1) the mutated amino acids are highly conserved and our structural analysis supported them to be functionally deleterious; 2) The carrier frequencies of the variants are very low in populations (1:60.000), with no homozygous carriers found; 3) The RC complex amounts in the subject’s myoblasts were functionally rescued by expression of wild-type PNPT1. (PMID:28645153)
  • The disease-linked human PNPase mutants, Q387R and E475G, form dimers, not trimers, and have significantly lower RNA binding and degradation activities compared to wild-type. The S1 domain is responsible for binding structured RNAs. The RNA-binding K homology and S1 domains are inaccessible in the dimeric assembly. Mutations at the trimeric PNPase interface produce a dimeric protein with destructsive RNA-binding surfaces. (PMID:30020492)
  • PNPT1-related disorders may constitute a spectrum rather than distinct phenotypes. (PMID:30244537)
  • PNPT1 and PCGF3 variants associated with angiotensin-converting enzyme inhibitor-induced cough: a nested case-control genome-wide study. (PMID:32397904)
  • Heterogeneity of PNPT1 neuroimaging: mitochondriopathy, interferonopathy or both? (PMID:33199448)
  • Crystallographic modeling of the PNPT1:c.1453A>G variant as a cause of mitochondrial dysfunction and autosomal recessive deafness; expanding the neuroimaging and clinical features. (PMID:33812062)
  • PNPT1, MYO15A, PTPRQ, and SLC12A2-associated genetic and phenotypic heterogeneity among hearing impaired assortative mating families in Southern India. (PMID:34374074)
  • Ocular Manifestations of PNPT1-Related Neuropathy. (PMID:34415280)
  • Activity and Function in Human Cells of the Evolutionary Conserved Exonuclease Polynucleotide Phosphorylase. (PMID:35163574)
  • Heterozygous PNPT1 Variants Cause Spinocerebellar Ataxia Type 25. (PMID:35411967)
  • SP1 and NFY Regulate the Expression of PNPT1, a Gene Encoding a Mitochondrial Protein Involved in Cancer. (PMID:36232701)
  • Human PNPase causes RNA stabilization and accumulation of R-loops in the Escherichia coli model system. (PMID:37479726)

Cross-species orthologs

4 orthologs

OrganismSymbolGene ID
mus_musculusPnpt1ENSMUSG00000020464
rattus_norvegicusPnpt1ENSRNOG00000003600
drosophila_melanogasterPNPaseFBGN0039846
caenorhabditis_elegansWBGENE00015266

Protein

Protein identifiers

Polyribonucleotide nucleotidyltransferase 1, mitochondrialQ8TCS8 (reviewed: Q8TCS8)

Alternative names: 3’-5’ RNA exonuclease OLD35, PNPase old-35, Polynucleotide phosphorylase 1, Polynucleotide phosphorylase-like protein

All UniProt accessions (4): Q8TCS8, F8WBI3, H7BXF6, H7C3C5

UniProt curated annotations — full annotation on UniProt →

Function. RNA-binding protein implicated in numerous RNA metabolic processes. Catalyzes the phosphorolysis of single-stranded polyribonucleotides processively in the 3’-to-5’ direction. Mitochondrial intermembrane factor with RNA-processing exoribonulease activity. Component of the mitochondrial degradosome (mtEXO) complex, that degrades 3’ overhang double-stranded RNA with a 3’-to-5’ directionality in an ATP-dependent manner. Involved in the degradation of non-coding mitochondrial transcripts (MT-ncRNA) and tRNA-like molecules. Required for correct processing and polyadenylation of mitochondrial mRNAs. Plays a role as a cytoplasmic RNA import factor that mediates the translocation of small RNA components, like the 5S RNA, the RNA subunit of ribonuclease P and the mitochondrial RNA-processing (MRP) RNA, into the mitochondrial matrix. Plays a role in mitochondrial morphogenesis and respiration; regulates the expression of the electron transport chain (ETC) components at the mRNA and protein levels. In the cytoplasm, shows a 3’-to-5’ exoribonuclease mediating mRNA degradation activity; degrades c-myc mRNA upon treatment with IFNB1/IFN-beta, resulting in a growth arrest in melanoma cells. Regulates the stability of specific mature miRNAs in melanoma cells; specifically and selectively degrades miR-221, preferentially. Also plays a role in RNA cell surveillance by cleaning up oxidized RNAs. Binds to the RNA subunit of ribonuclease P, MRP RNA and miR-221 microRNA.

Subunit / interactions. Homotrimer; in free form. Homooligomer. Component of the mitochondrial degradosome (mtEXO) complex which is a heteropentamer containing 2 copies of SUPV3L1 and 3 copies of PNPT1. As part of the mitochondrial degradosome complex, interacts with GRSF1 in an RNA-dependent manner; the interaction enhances the activity of the complex. Interacts with TCL1A; the interaction has no effect on PNPT1 exonuclease activity.

Subcellular location. Cytoplasm. Mitochondrion matrix. Mitochondrion intermembrane space.

Disease relevance. Combined oxidative phosphorylation deficiency 13 (COXPD13) [MIM:614932] A mitochondrial disorder characterized by early onset severe encephalomyopathy, dystonia, choreoathetosis, bucofacial dyskinesias and combined mitochondrial respiratory chain deficiency. Nerve conductions velocities are decreased. Levels of plasma and cerebrospinal fluid lactate are increased. The disease is caused by variants affecting the gene represented in this entry. Deafness, autosomal recessive, 70, with or without adult-onset neurodegeneration (DFNB70) [MIM:614934] A form of non-syndromic deafness characterized by severe, bilateral hearing impairment with prelingual onset, resulting in inability to acquire normal speech. Affected individuals may develop a neurodegenerative disease in adulthood, including ataxia with loss of ambulation, optic atrophy, dystonia or spasticity, and cognitive decline with psychiatric features. The disease is caused by variants affecting the gene represented in this entry. Spinocerebellar ataxia 25 (SCA25) [MIM:608703] An autosomal dominant form of spinocerebellar ataxia, a clinically and genetically heterogeneous group of cerebellar disorders. Patients show progressive incoordination of gait and often poor coordination of hands, speech and eye movements, due to degeneration of the cerebellum with variable involvement of the brainstem and spinal cord. SCA25 is characterized by the onset of lower limb ataxia and gait difficulties in the first few decades of life, although later onset has been reported. There is incomplete penetrance and variable expressivity, even within families. The disease is caused by variants affecting the gene represented in this entry. Both genetic variants associated so far with this disease are affecting splicing.

Induction. Up-regulated in cells upon senescence and terminal differentiation. Up-regulated after treatment with IFNB1/IFN-beta.

Similarity. Belongs to the polyribonucleotide nucleotidyltransferase family.

RefSeq proteins (1): NP_149100* (*=MANE)

Domains & families (InterPro)

IDNameType
IPR001247ExoRNase_PH_dom1Domain
IPR003029S1_domainDomain
IPR004087KH_domDomain
IPR004088KH_dom_type_1Domain
IPR012162PNPaseFamily
IPR012340NA-bd_OB-foldHomologous_superfamily
IPR015847ExoRNase_PH_dom2Domain
IPR015848PNPase_PH_RNA-bd_bac/org-typeDomain
IPR020568Ribosomal_Su5_D2-typ_SFHomologous_superfamily
IPR027408PNPase/RNase_PH_dom_sfHomologous_superfamily
IPR036345ExoRNase_PH_dom2_sfHomologous_superfamily
IPR036456PNPase_PH_RNA-bd_sfHomologous_superfamily
IPR036612KH_dom_type_1_sfHomologous_superfamily

Pfam: PF00013, PF00575, PF01138, PF03725, PF03726

Enzyme classification (BRENDA):

  • EC 2.7.7.8 — polyribonucleotide nucleotidyltransferase (BRENDA: 59 organisms, 216 substrates, 43 inhibitors, 23 Km, 7 kcat entries)

Substrate kinetics (BRENDA)

19 substrates with measured Km, best-characterized 15. Km ranges are aggregated across organisms/conditions.

SubstrateKm (mM)Measurements
ADP0.0536–256
UDP0.4–12
2’,3’-CYCLIC RNAN0.0421
3’-PHOSPHORYLATED RNA(N)0.1561
CDP11
GLOBIN MRNA0.00021
HEPTAURIDYLATE0.051
MG2+0.051
NONAADENYLATE0.0331
PHOSPHATE0.251
POLY(A)0.321
RNA(N)0.0221
TETRAURIDYLATE0.251
TRIADENYLATE2.51
POLY(A)N0

Catalyzed reactions (Rhea), 1 shown:

  • RNA(n+1) + phosphate = RNA(n) + a ribonucleoside 5’-diphosphate (RHEA:22096)

UniProt features (71 total): strand 27, helix 21, modified residue 7, sequence variant 5, mutagenesis site 4, domain 2, turn 2, transit peptide 1, chain 1, sequence conflict 1

Structure

Experimental structures (PDB)

11 structures.

PDBMethodResolution (Å)
9NO0ELECTRON MICROSCOPY2.08
3U1KX-RAY DIFFRACTION2.13
9NJBELECTRON MICROSCOPY2.15
9NJCELECTRON MICROSCOPY2.36
9NJDELECTRON MICROSCOPY2.44
9NJEELECTRON MICROSCOPY2.44
9XYIELECTRON MICROSCOPY2.46
9XZFELECTRON MICROSCOPY2.65
5ZF6X-RAY DIFFRACTION2.8
9KJTELECTRON MICROSCOPY3.84
9KJRELECTRON MICROSCOPY3.86

Predicted structure (AlphaFold)

ModelpLDDTFraction very-high
AF-Q8TCS8-F187.460.71

Functional residue map

Curated UniProt residues grouped by drug-discovery relevance — catalytic, ligand-binding, modification, and mutation-validated positions. Source: UniProtKB sequence features.

Post-translational modifications (7): 782, 250, 264, 285, 289, 552, 754

Mutagenesis-validated functional residues (4):

PositionPhenotype
135inhibits poly(a) polymerase and rna degradation activities. inhibits the import or stabilization of rnase p rna into the
445–446stimulates in vitro poly(a) polymerase activity. inhibits rna degradation activity. does not inhibit the import or stabi
484inhibits poly(a) polymerase and rna degradation activities. does not inhibit the import or stabilization of rnase p rna
544stimulates in vitro poly(a) polymerase activity. inhibits rna degradation activity. inhibits the import or stabilization

Function

Pathways and Gene Ontology

Reactome pathways

1 pathways

IDPathway
R-HSA-9836573Mitochondrial RNA degradation

MSigDB gene sets: 432 (showing top): GOBP_RESPONSE_TO_NITROGEN_COMPOUND, RODRIGUES_THYROID_CARCINOMA_ANAPLASTIC_UP, GOBP_HEPATICOBILIARY_SYSTEM_DEVELOPMENT, GOMF_RNA_NUCLEASE_ACTIVITY, RODRIGUES_THYROID_CARCINOMA_POORLY_DIFFERENTIATED_UP, GOBP_REGULATION_OF_MRNA_CATABOLIC_PROCESS, GOBP_RESPONSE_TO_PEPTIDE, GOMF_NUCLEASE_ACTIVITY, GRAESSMANN_APOPTOSIS_BY_SERUM_DEPRIVATION_UP, GRAESSMANN_APOPTOSIS_BY_DOXORUBICIN_UP, GOBP_MACROMOLECULE_CATABOLIC_PROCESS, GOBP_REGENERATION, GOBP_CELLULAR_SENESCENCE, GOBP_RESPONSE_TO_INTERFERON_BETA, GOBP_GENERATION_OF_PRECURSOR_METABOLITES_AND_ENERGY

GO Biological Process (25): mitochondrial RNA catabolic process (GO:0000957), mitochondrial mRNA catabolic process (GO:0000958), positive regulation of mitochondrial RNA catabolic process (GO:0000962), mitochondrial RNA 5’-end processing (GO:0000964), mitochondrial RNA 3’-end processing (GO:0000965), mRNA processing (GO:0006397), RNA catabolic process (GO:0006401), mRNA catabolic process (GO:0006402), mitochondrion organization (GO:0007005), cellular response to oxidative stress (GO:0034599), cellular response to interferon-beta (GO:0035458), RNA import into mitochondrion (GO:0035927), rRNA import into mitochondrion (GO:0035928), regulation of cellular respiration (GO:0043457), protein homooligomerization (GO:0051260), response to cAMP (GO:0051591), response to growth hormone (GO:0060416), positive regulation of mRNA catabolic process (GO:0061014), protein homotrimerization (GO:0070207), nuclear polyadenylation-dependent mRNA catabolic process (GO:0071042), mitochondrial mRNA polyadenylation (GO:0097222), liver regeneration (GO:0097421), positive regulation of miRNA catabolic process (GO:2000627), regulation of cellular senescence (GO:2000772), RNA processing (GO:0006396)

GO Molecular Function (14): 3’-5’-RNA exonuclease activity (GO:0000175), RNA binding (GO:0003723), polyribonucleotide nucleotidyltransferase activity (GO:0004654), poly(U) RNA binding (GO:0008266), poly(G) binding (GO:0034046), miRNA binding (GO:0035198), identical protein binding (GO:0042802), nucleic acid binding (GO:0003676), nuclease activity (GO:0004518), exonuclease activity (GO:0004527), protein binding (GO:0005515), transferase activity (GO:0016740), nucleotidyltransferase activity (GO:0016779), hydrolase activity (GO:0016787)

GO Cellular Component (10): cytoplasm (GO:0005737), mitochondrion (GO:0005739), mitochondrial intermembrane space (GO:0005758), mitochondrial matrix (GO:0005759), endoplasmic reticulum membrane (GO:0005789), cytosol (GO:0005829), ribosome (GO:0005840), mitochondrial degradosome (GO:0045025), membrane (GO:0016020), exoribonuclease complex (GO:1905354)

Reactome top-level categories

Rollup of top-1 pathways:

CategoryPathways
Metabolism of RNA1

GO top-level categories

Rollup of top GO terms by namespace:

CategoryTerms
mitochondrion5
cellular anatomical structure3
RNA catabolic process2
mitochondrial RNA catabolic process2
mRNA catabolic process2
positive regulation of catabolic process2
mitochondrial RNA processing2
mRNA metabolic process2
binding2
catalytic activity2
cytoplasm2
mitochondrial RNA metabolic process1
regulation of mitochondrial RNA catabolic process1
positive regulation of RNA metabolic process1
RNA 5’-end processing1
RNA 3’-end processing1
RNA processing1
RNA metabolic process1
nucleic acid catabolic process1
negative regulation of gene expression1
organelle organization1
response to oxidative stress1
cellular response to chemical stress1
response to interferon-beta1
cellular response to cytokine stimulus1
intercellular transport1
RNA transport1
transmembrane transport1
RNA import into mitochondrion1
rRNA transport1
regulation of generation of precursor metabolites and energy1
cellular respiration1
protein complex oligomerization1
response to purine-containing compound1
response to organophosphorus1
response to oxygen-containing compound1
response to peptide hormone1
regulation of mRNA catabolic process1
positive regulation of mRNA metabolic process1
protein homooligomerization1

Protein interactions and networks

STRING

3438 interactions, top by confidence (×1000):

Protein AProtein BPartner UniProtScore
PNPT1SUPV3L1Q8IYB8997
PNPT1PPP1R8Q12972952
PNPT1REXO2Q9Y3B8743
PNPT1YBEYP58557713
PNPT1MTPAPQ9NVV4709
PNPT1EXOSC4Q9NPD3688
PNPT1IRF9Q00978675
PNPT1EXOSC10Q01780664
PNPT1DIS3Q9Y2L1645
PNPT1SLIRPQ9GZT3628
PNPT1FASTKD3Q14CZ7621
PNPT1ELAC2Q9BQ52608
PNPT1LRPPRCP42704601
PNPT1PAPOLAP51003586
PNPT1EXOSC7Q15024586

IntAct

104 interactions, top by confidence:

ABTypeScore
SUPV3L1PNPT1psi-mi:“MI:0407”(direct interaction)0.860
PNPT1SUPV3L1psi-mi:“MI:0407”(direct interaction)0.860
PNPT1SUPV3L1psi-mi:“MI:0915”(physical association)0.860
TMED2ATP9Apsi-mi:“MI:0914”(association)0.640
TBRG4PNPT1psi-mi:“MI:0914”(association)0.640
ADARB1PNPT1psi-mi:“MI:0915”(physical association)0.560
PNPT1PNPT1psi-mi:“MI:0407”(direct interaction)0.560
HSCBPNPT1psi-mi:“MI:0915”(physical association)0.550
SERPINA12TSPAN6psi-mi:“MI:0914”(association)0.530
ATP5F1DNDUFB5psi-mi:“MI:0914”(association)0.530
ACAD9PPLpsi-mi:“MI:0914”(association)0.530
FAHD1CLUHpsi-mi:“MI:0914”(association)0.530
AURKBSMCHD1psi-mi:“MI:0914”(association)0.530
UQCRFS1NDUFAB1psi-mi:“MI:0914”(association)0.530
SUPV3L1HNRNPDLpsi-mi:“MI:0914”(association)0.480
TRMT61BGLSpsi-mi:“MI:0914”(association)0.480
PNPT1psi-mi:“MI:0902”(rna cleavage)0.440
XIRP2PNPT1psi-mi:“MI:0915”(physical association)0.400
GBP4PNPT1psi-mi:“MI:0915”(physical association)0.400
HSPB1PNPT1psi-mi:“MI:0915”(physical association)0.370
LTN1KIF2Apsi-mi:“MI:0914”(association)0.350
FASTKD3VWA8psi-mi:“MI:0914”(association)0.350

BioGRID (199): PNPT1 (Affinity Capture-RNA), PNPT1 (Affinity Capture-MS), PNPT1 (Affinity Capture-MS), PNPT1 (Affinity Capture-MS), PNPT1 (Two-hybrid), CLTB (Co-fractionation), EIF4A1 (Co-fractionation), PMPCA (Co-fractionation), PNPT1 (Co-fractionation), PNPT1 (Affinity Capture-MS), PNPT1 (Affinity Capture-MS), PNPT1 (Affinity Capture-MS), PNPT1 (Affinity Capture-MS), PNPT1 (Affinity Capture-MS), PNPT1 (Affinity Capture-MS)

ESM2 similar proteins: A2RVK7, A2X0Q3, A6QLJ3, O00442, O23617, O81147, O81852, P0CT46, P31754, P37142, P48605, P49080, P49368, P80318, Q01415, Q06265, Q14181, Q2HJ88, Q2KHU3, Q3SWZ4, Q3T0K2, Q4QR75, Q4R3J0, Q4R963, Q5NVF9, Q5R6J8, Q5R7P3, Q5RCW2, Q5RGJ5, Q5XJQ5, Q69LE7, Q6P502, Q6STH5, Q6YXZ7, Q7YRA3, Q84T68, Q8C3X4, Q8GZQ3, Q8K1R3, Q8N442

Diamond homologs: A0LHM4, A0Q0Q1, A1AMM6, A1B5P9, A1U5Z6, A1VG88, A4IME3, A4XL64, A5E870, A5GF91, A5ISF8, A5URV5, A5VCY9, A6QGH3, A6TRK1, A6U193, A6UF34, A7H9F8, A7IC03, A7MZI2, A7X1Q8, A8Z3V4, A9WEJ7, B0K1D0, B0K9P4, B0S1D9, B0SH22, B0SQH8, B0THS2, B1ZS98, B2UNA9, B3DZ86, B3PIA0, B3QAB0, B3QY14, B4S5G5, B5EMD4, B6J6S7, B7J4D8, B8DN07

SIGNOR signaling

1 interactions.

AEffectBMechanism
PRKDC“up-regulates activity”PNPT1phosphorylation

Enriched among interaction partners

Reactome pathways and GO biological processes over-represented among this gene’s 114 IntAct physical interaction partners (hypergeometric vs the genome-wide background, BH-FDR, gene-set size 15–500, ranked by fold). A functional readout of the neighbourhood — distinct from this gene’s own memberships above, and biased toward well-studied / hub proteins, so read it as themes rather than proof.

Reactome pathways:

PathwayPartnersFoldFDR
Mitochondrial ribosome-associated quality control812.9×8e-05
Mitochondrial protein import511.1×8e-03
Mitochondrial translation initiation610.0×5e-03
Mitochondrial translation elongation610.0×5e-03
Mitochondrial translation termination68.7×8e-03

GO biological processes:

GO termPartnersFoldFDR
mitochondrial large ribosomal subunit assembly764.8×5e-09
mitochondrial translation813.0×7e-05

Disease & clinical

Clinical variants and AI predictions

ClinVar

978 variants total. Per-class counts are floors (≥ shown; pagination cap):

ClassificationCount (floor)
Pathogenic37
Likely pathogenic31
Uncertain significance343
Likely benign401
Benign81

Top pathogenic / likely-pathogenic (30)

Variant IDHGVSClassification
1034189NM_033109.5(PNPT1):c.298-2A>TPathogenic
1034190NM_033109.5(PNPT1):c.918del (p.Val307fs)Pathogenic
1455027NM_033109.5(PNPT1):c.1748dup (p.Glu584fs)Pathogenic
1460256NC_000002.11:g.(?55910900)(55920958_?)delPathogenic
1695428NM_033109.5(PNPT1):c.2069+3A>GPathogenic
1700630NM_033109.5(PNPT1):c.1579_1580insGAT (p.Tyr527Ter)Pathogenic
1705644NM_033109.5(PNPT1):c.574C>T (p.Arg192Ter)Pathogenic
1805654NM_033109.5(PNPT1):c.406C>T (p.Arg136Cys)Pathogenic
1938148NM_033109.5(PNPT1):c.885_886del (p.Tyr296fs)Pathogenic
2063935NM_033109.5(PNPT1):c.1789C>T (p.Arg597Ter)Pathogenic
2095601NM_033109.5(PNPT1):c.1920_1923del (p.Ser640fs)Pathogenic
2109038NM_033109.5(PNPT1):c.1336A>T (p.Arg446Ter)Pathogenic
2113226NM_033109.5(PNPT1):c.2014C>T (p.Gln672Ter)Pathogenic
218175NM_033109.5(PNPT1):c.404-1G>APathogenic
2312554NM_033109.5(PNPT1):c.887_888del (p.Tyr296fs)Pathogenic
2427121NC_000002.11:g.(?55894977)(55913599_?)delPathogenic
253225NM_033109.5(PNPT1):c.760C>A (p.Gln254Lys)Pathogenic
2581355NC_000002.11:g.(?_55861197)_55874535delPathogenic
2805003NM_033109.5(PNPT1):c.1180del (p.Leu394fs)Pathogenic
2826377NM_033109.5(PNPT1):c.2131C>T (p.Gln711Ter)Pathogenic
2836084NM_033109.5(PNPT1):c.1012G>T (p.Glu338Ter)Pathogenic
3233882NM_033109.5(PNPT1):c.1002T>G (p.Tyr334Ter)Pathogenic
3247575NC_000002.11:g.(?55870273)(55883526_?)delPathogenic
3649678NM_033109.5(PNPT1):c.195del (p.Arg65fs)Pathogenic
3722315NM_033109.5(PNPT1):c.1841T>G (p.Leu614Ter)Pathogenic
3724544NM_033109.5(PNPT1):c.600dup (p.Val201fs)Pathogenic
39801NM_033109.5(PNPT1):c.1160A>G (p.Gln387Arg)Pathogenic
419024NM_033109.5(PNPT1):c.1174_1175del (p.Gln392fs)Pathogenic
4540450NM_033109.5(PNPT1):c.1258del (p.Asp420fs)Pathogenic
4731230NM_033109.5(PNPT1):c.828dup (p.Phe277fs)Pathogenic

SpliceAI

3258 predictions. Top by Δscore:

VariantEffectΔscore
2:55636390:CAC:Cacceptor_gain1.0000
2:55636391:ACCT:Aacceptor_loss1.0000
2:55636392:CC:Cacceptor_loss1.0000
2:55636392:CCTG:Cacceptor_gain1.0000
2:55636393:C:CCacceptor_gain1.0000
2:55636394:T:Cacceptor_loss1.0000
2:55636395:G:Cacceptor_gain1.0000
2:55636395:G:GCacceptor_gain1.0000
2:55637547:AATAC:Adonor_loss1.0000
2:55637548:ATACC:Adonor_loss1.0000
2:55637549:TA:Tdonor_loss1.0000
2:55637550:ACCT:Adonor_loss1.0000
2:55637551:C:CAdonor_loss1.0000
2:55637596:TAAT:Tacceptor_gain1.0000
2:55637596:TAATC:Tacceptor_loss1.0000
2:55637597:AATC:Aacceptor_loss1.0000
2:55637598:ATCTG:Aacceptor_loss1.0000
2:55637599:TCTGG:Tacceptor_loss1.0000
2:55637600:C:CAacceptor_loss1.0000
2:55637600:C:CCacceptor_gain1.0000
2:55637601:T:Cacceptor_loss1.0000
2:55640621:TTTTA:Tdonor_loss1.0000
2:55640622:TTTA:Tdonor_loss1.0000
2:55640623:TTACC:Tdonor_loss1.0000
2:55640624:TACCT:Tdonor_loss1.0000
2:55640626:C:Adonor_loss1.0000
2:55640701:TATCT:Tacceptor_gain1.0000
2:55640704:CT:Cacceptor_gain1.0000
2:55640705:TCTAC:Tacceptor_loss1.0000
2:55640706:C:Aacceptor_loss1.0000

AlphaMissense

5065 scored. Top likely-pathogenic:

VariantProtein changeam_pathogenicity
2:55636386:A:CY735D0.999
2:55640640:A:GL712P0.999
2:55646457:G:CD544E0.999
2:55646457:G:TD544E0.999
2:55646458:T:GD544A0.999
2:55646459:C:GD544H0.999
2:55646475:A:CD538E0.999
2:55646475:A:TD538E0.999
2:55646476:T:AD538V0.999
2:55646476:T:CD538G0.999
2:55646476:T:GD538A0.999
2:55646477:C:GD538H0.999
2:55647354:T:AD532V0.999
2:55647355:C:GD532H0.999
2:55647414:C:TG512E0.999
2:55654947:G:AS483F0.999
2:55654947:G:TS483Y0.999
2:55654953:C:TG481E0.999
2:55656131:C:AG481W0.999
2:55656306:A:CH450Q0.999
2:55656306:A:TH450Q0.999
2:55656318:T:AR446S0.999
2:55656318:T:GR446S0.999
2:55656369:A:CF429L0.999
2:55656369:A:TF429L0.999
2:55656371:A:GF429L0.999
2:55667022:C:TG382E0.999
2:55667064:C:AR368M0.999
2:55667064:C:GR368T0.999
2:55667082:C:GR362P0.999

dbSNP variants (sampled 300 via entrez): RS1000029307 (2:55682137 C>T), RS1000079124 (2:55673871 A>T), RS1000109181 (2:55640529 T>C), RS1000191519 (2:55690052 A>G), RS1000244236 (2:55684418 C>T), RS1000283117 (2:55650018 T>C), RS1000320975 (2:55642513 G>A), RS1000337743 (2:55693570 G>C), RS1000374762 (2:55642873 T>G), RS1000380727 (2:55668634 T>C), RS1000403182 (2:55693404 C>A,G,T), RS1000423887 (2:55679644 T>A), RS1000557587 (2:55634993 G>GACCT), RS1000571214 (2:55689322 A>C), RS1000574938 (2:55651645 C>T)

Disease associations

OMIM: gene MIM:610316 | disease phenotypes: MIM:608703, MIM:614932, MIM:614934, MIM:181500

GenCC curated gene-disease

DiseaseClassificationInheritance
combined oxidative phosphorylation defect type 13DefinitiveAutosomal recessive
hearing loss disorderDefinitiveAutosomal recessive
autosomal recessive nonsyndromic hearing loss 70StrongAutosomal dominant
spinocerebellar ataxia type 25ModerateAutosomal dominant
hearing loss, autosomal recessiveSupportiveAutosomal recessive

ClinGen Gene-Disease Validity (1)

Expert-panel classifications — Definitive > Strong > Moderate > Limited > Disputed > Refuted.

DiseaseClassificationInheritance
Leigh syndromeModerateAR

Mondo (8): spinocerebellar ataxia type 25 (MONDO:0012103), combined oxidative phosphorylation defect type 13 (MONDO:0013977), autosomal recessive nonsyndromic hearing loss 70 (MONDO:0013978), hereditary ataxia (MONDO:0100309), schizophrenia (MONDO:0005090), neurodevelopmental disorder (MONDO:0700092), hearing loss, autosomal recessive (MONDO:0019588), hearing loss disorder (MONDO:0005365)

Orphanet (5): Spinocerebellar ataxia type 25 (Orphanet:101111), Combined oxidative phosphorylation defect type 13 (Orphanet:319514), Rare autosomal recessive non-syndromic sensorineural deafness type DFNB (Orphanet:90636), Hereditary ataxia (Orphanet:183518), NON RARE IN EUROPE: Schizophrenia (Orphanet:3140)

HPO phenotypes

80 total (30 of 80 shown, HPO-id order):

HPOTerm
HP:0000006Autosomal dominant inheritance
HP:0000007Autosomal recessive inheritance
HP:0000012Urinary urgency
HP:0000317Facial myokymia
HP:0000365Hearing impairment
HP:0000407Sensorineural hearing impairment
HP:0000486Strabismus
HP:0000496Abnormality of eye movement
HP:0000505Visual impairment
HP:0000518Cataract
HP:0000519Developmental cataract
HP:0000639Nystagmus
HP:0000657Oculomotor apraxia
HP:0000762Decreased nerve conduction velocity
HP:0000763Sensory neuropathy
HP:0001251Ataxia
HP:0001260Dysarthria
HP:0001265Hyporeflexia
HP:0001266Choreoathetosis
HP:0001272Cerebellar atrophy
HP:0001273Abnormal corpus callosum morphology
HP:0001290Generalized hypotonia
HP:0001298Encephalopathy
HP:0001324Muscle weakness
HP:0001332Dystonia
HP:0001344Absent speech
HP:0001508Failure to thrive
HP:0001510Growth delay
HP:0001511Intrauterine growth retardation
HP:0001751Abnormal vestibular function

GWAS associations

43 associations (top):

StudyTraitp-value
GCST000175_37Height6.000000e-11
GCST002702_33Height1.000000e-25
GCST004137_47Optic cup area8.000000e-07
GCST004137_7Optic cup area5.000000e-08
GCST004278_86Pulse pressure8.000000e-06
GCST005580_236Intraocular pressure6.000000e-17
GCST005580_239Intraocular pressure8.000000e-17
GCST006065_13Glaucoma (primary open-angle)6.000000e-10
GCST006258_26Diastolic blood pressure2.000000e-09
GCST006259_34Systolic blood pressure3.000000e-06
GCST006291_60Spherical equivalent or myopia (age of diagnosis)1.000000e-10
GCST007096_44Pulse pressure2.000000e-11
GCST007097_4Pulse pressure7.000000e-06
GCST007932_56Medication use (thyroid preparations)3.000000e-08
GCST007944_14Medication use (antiglaucoma preparations and miotics)5.000000e-08
GCST008161_28Waist circumference adjusted for body mass index1.000000e-06
GCST008163_123Height7.000000e-06
GCST009724_92Vertical cup-disc ratio (multi-trait analysis)1.000000e-19
GCST009725_58Intraocular pressure2.000000e-09
GCST009726_18Glaucoma6.000000e-06
GCST010002_365Refractive error3.000000e-34
GCST010571_11Autoimmune thyroid disease4.000000e-09
GCST011946_17White matter hyperintensity volume2.000000e-07
GCST011947_19White matter hyperintensity volume1.000000e-06
GCST011949_33White matter hyperintensity volume (adjusted for hypertension)8.000000e-07
GCST011950_24White matter hyperintensity volume (adjusted for hypertension)7.000000e-06
GCST011952_12White matter hyperintensity volume x hypertension interaction (2df)3.000000e-06
GCST012226_162Waist circumference adjusted for body mass index1.000000e-14
GCST012226_166Waist circumference adjusted for body mass index3.000000e-10
GCST012226_167Waist circumference adjusted for body mass index6.000000e-16

EFO canonical traits (11, from GWAS)

EFO IDTrait name
EFO:0005763pulse pressure measurement
EFO:0004695intraocular pressure measurement
EFO:0006336diastolic blood pressure
EFO:0006335systolic blood pressure
EFO:0004847age at onset
EFO:0009933Thyroid preparation use measurement
EFO:0009944Antiglaucoma preparations and miotics use measurement
EFO:0007789BMI-adjusted waist circumference
EFO:0006939cup-to-disc ratio measurement
EFO:0005665white matter hyperintensity measurement
EFO:0008039BMI-adjusted hip circumference

MeSH disease descriptors (5)

DescriptorNameTree numbers
D034381Hearing LossC09.218.458.341; C10.597.751.418.341; C23.888.592.763.393.341
D065886Neurodevelopmental DisordersF03.625
C564609Deafness, Autosomal Recessive (supp.)
C531684Hereditary spinal ataxia (supp.)
C537202Spinocerebellar ataxia 25 (supp.)

Drugs & pharmacology

Drug and pharmacology data

Is drug target: no

PharmGKB: 1 entry (VIP=true, CPIC=false)

PharmGKB variants

2 variants.

VariantGenesLevelScore#Clin annotsDrugs
rs13009649PNPT10.000
rs13015243PNPT10.000

CTD chemical–gene interactions

56 total (human), top 30 by PubMed support.

ChemicalActions (top 5)PubMed papers
sodium arsenitedecreases expression, affects cotreatment, increases abundance, increases expression4
Acetaminophendecreases expression, increases expression3
Arsenicincreases expression, decreases expression, affects cotreatment, increases abundance2
Estradiolincreases expression2
Hydrogen Peroxideaffects expression2
Lipopolysaccharidesincreases expression, affects response to substance2
Tetrachlorodibenzodioxindecreases expression2
Cyclosporineincreases expression2
Cadmium Chloridedecreases expression2
Particulate Matterdecreases expression, increases expression2
afuresertibdecreases expression1
bisphenol Fincreases expression1
dicrotophosdecreases expression1
triphenyl phosphateaffects expression1
bisphenol Adecreases expression1
trichostatin Aincreases expression1
tris(1,3-dichloro-2-propyl)phosphatedecreases expression1
butyraldehydedecreases expression1
perfluorooctanoic acidincreases expression1
manganese chlorideincreases abundance, increases expression, affects cotreatment1
potassium chromate(VI)affects cotreatment, decreases expression1
S-(1,2-dichlorovinyl)cysteineincreases expression, affects response to substance1
epigallocatechin gallateaffects cotreatment, decreases expression1
di-n-butylphosphoric acidaffects expression1
chloropicrinincreases expression1
4-(5-benzo(1,3)dioxol-5-yl-4-pyridin-2-yl-1H-imidazol-2-yl)benzamideaffects cotreatment, decreases expression1
erucylphospho-N,N,N-trimethylpropylammoniumincreases expression1
ICG 001increases expression1
bisphenol Sincreases expression1
jinfukangdecreases expression1

Cellosaurus cell lines

1 cell lines: 1 cancer cell line

First 10 cell lines (id-ordered, not curated):

CellosaurusNameCategorySex
CVCL_F1MBHyCyte A-549 KO-hPNPT1Cancer cell lineMale

Clinical trials (associated diseases)

599 trials via MONDO — disease-level, not drug-specific.

TrialPhaseStatusTitle
NCT00205881PHASE4COMPLETEDBilateral Benefit in Adult Users of the HiRes 90K Bionic Ear System
NCT00331539PHASE4UNKNOWNRelationship Between Auto NRT and Behavioural T & C Levels With the Nucleus Freedom Cochlear Implant
NCT00424307PHASE4UNKNOWNBilateral Cochlear Implant Benefit in Young Children
NCT00765635PHASE4COMPLETEDChlorobutanol, Potassium Carbonate, and Irrigation in Cerumen Removal
NCT03321006PHASE4COMPLETEDTreating Hearing Loss to Improve Mood and Cognition in Older Adults
NCT00000374PHASE4COMPLETEDTreatment for First-Episode Schizophrenia
NCT00001656PHASE4COMPLETEDComparison of Clozapine vs Olanzapine in Childhood-Onset Psychotic Disorders
NCT00007774PHASE4COMPLETEDTo Determine if Olanzapine is More Cost Effective Than Haloperidol for the Treatment of Schizophrenia
NCT00014001PHASE4COMPLETEDCATIE- Schizophrenia Trial
NCT00018668PHASE4COMPLETEDAntipsychotic Response in Schizophrenia
NCT00034801PHASE4COMPLETEDOlanzapine Versus Active Comparator in the Treatment of Depression in Patients With Schizophrenia
NCT00034905PHASE4COMPLETEDA Comparison of Seroquel vs. Risperidone in Schizophrenia
NCT00036088PHASE4COMPLETEDOlanzapine Versus An Active Comparator in the Treatment of Schizophrenia
NCT00044187PHASE4COMPLETEDThe Assessment of a Weight-Gain Agent for the Treatment of Olanzapine-Associated Anti-Obesity Agent in Patients With Schizophrenia, Schizophreniform Disorder, Schizoaffective Disorder, and Bipolar I Disorder
NCT00044655PHASE4COMPLETEDSwitching Medication to Treat Schizophrenia
NCT00048828PHASE4COMPLETEDTreating Drug-Resistant Childhood Schizophrenia
NCT00053703PHASE4COMPLETEDTreatment of Early Onset Schizophrenia Spectrum Disorders (TEOSS)
NCT00056498PHASE4COMPLETEDRisperidone Treatment in Schizophrenia Patients Who Are Currently Taking Clozapine
NCT00061802PHASE4COMPLETEDEfficacy and Safety of Two Atypical Antipsychotics vs. Placebo in Patients With an Acute Exacerbation of Either Schizophrenia or Schizoaffective Disorder
NCT00080327PHASE4COMPLETEDStudy of Three Doses of Aripiprazole in Patients With Acute Schizophrenia
NCT00088049PHASE4COMPLETEDStudy of Olanzapine vs. Aripiprazole in the Treatment of Schizophrenia
NCT00090012PHASE4COMPLETEDComparison of Continuing Olanzapine to Switching to Quetiapine in Overweight or Obese Patients With Schizophrenia and Schizoaffective Disorder
NCT00100776PHASE4COMPLETEDEfficacy of High Dose Olanzapine for the Treatment of Schizophrenia and Schizoaffective Disorder
NCT00103571PHASE4COMPLETEDOlanzapine Versus Aripiprazole in the Treatment of Acutely Ill Patients With Schizophrenia
NCT00108368PHASE4COMPLETEDThe Effects of Risperidone and Olanzapine on Thinking
NCT00114595PHASE4COMPLETEDEthyl-Eicosapentaenoic Acid and Tardive Dyskinesia
NCT00130923PHASE4COMPLETEDRisperidone Long-acting Versus Oral Risperidone in Patients With Schizophrenia and Alcohol Use Disorder
NCT00137020PHASE4COMPLETEDClinical Effect Of Cross Titration Of Antipsychotics With Ziprasidone In Schizophrenia Or Schizoaffective Disorder
NCT00140166PHASE4COMPLETEDTreatment of Acute Schizophrenia With Vitamin Therapy
NCT00145847PHASE4COMPLETEDNaltrexone Treatment of Alcohol Abuse in Schizophrenia
NCT00148564PHASE4COMPLETEDEnergy Homeostasis Under Treatment With Atypical Antipsychotics
NCT00156715PHASE4COMPLETEDEfficacy of Quetiapine in the Treatment of Patients With Schizophrenia and a Comorbid Substance Use Disorder
NCT00158223PHASE4COMPLETEDEffectiveness of Pimozide in Augmenting the Effects of Clozapine in the Treatment of Schizophrenia
NCT00159081PHASE4COMPLETEDOne Year Drug Treatment in First-Episode Schizophrenia
NCT00159120PHASE4COMPLETEDMaintenance Treatment vs. Stepwise Drug Discontinuation in First-Episode Schizophrenia
NCT00159133PHASE4COMPLETEDProdrome-Based Early Intervention With Antipsychotics vs. Benzodiazepines in First-Episode Schizophrenia
NCT00159757PHASE4TERMINATED12 Week Open, Non-Comparative Switch Study Of Oral Ziprazidone In Previously Treated Schizophrenic Patients
NCT00167817PHASE4COMPLETEDEffect of Switch to Aripiprazole on Health and Smoking Parameters in Patients With Schizophrenia: A Pilot Study
NCT00169026PHASE4TERMINATEDAlcoholism and Schizophrenia: Effects of Clozapine
NCT00169039PHASE4TERMINATEDClozapine Versus Chlorpromazine for Treatment-Unresponsive Schizophrenia