TBL3

gene
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Also known as SAZDUTP13

Summary

TBL3 (transducin beta like 3, HGNC:11587) is a protein-coding gene on chromosome 16p13.3, encoding Transducin beta-like protein 3 (Q12788). Part of the small subunit (SSU) processome, first precursor of the small eukaryotic ribosomal subunit. It is a common-essential gene (DepMap: required in 97.8% of cancer cell lines).

The protein encoded by this gene has sequence similarity with members of the WD40 repeat-containing protein family. The WD40 group is a large family of proteins, which appear to have a regulatory function. It is believed that the WD40 repeats mediate protein-protein interactions and members of the family are involved in signal transduction, RNA processing, gene regulation, vesicular trafficking, cytoskeletal assembly and may play a role in the control of cytotypic differentiation. This gene has multiple polyadenylation sites. It might have multiple alternatively spliced transcript variants but the variants have not been fully described yet.

Source: NCBI Gene 10607 — RefSeq curated summary.

At a glance

  • Clinical variants (ClinVar): 233 total — 1 pathogenic
  • Druggable target: yes
  • Cancer dependency (DepMap): dependent in 97.8% of screened cell lines (common-essential)
  • MANE Select transcript: NM_006453

Identifiers

Gene identifiers

FieldValue
HGNC IDHGNC:11587
Approved symbolTBL3
Nametransducin beta like 3
Location16p13.3
Locus typegene with protein product
StatusApproved
AliasesSAZD, UTP13
Ensembl geneENSG00000183751
Ensembl biotypeprotein_coding
OMIM605915
Entrez10607

Gene structure

Transcript identifiers

Ensembl transcripts: 16 — 11 protein_coding, 4 retained_intron, 1 nonsense_mediated_decay

ENST00000332704, ENST00000561907, ENST00000564171, ENST00000567615, ENST00000568546, ENST00000569628, ENST00000569792, ENST00000861852, ENST00000861853, ENST00000939202, ENST00000939203, ENST00000939204, ENST00000939205, ENST00000960652, ENST00000960653, ENST00000960654

RefSeq mRNA: 1 — MANE Select: NM_006453 NM_006453

CCDS: CCDS10453

Canonical transcript exons

ENST00000568546 — 22 exons

ExonStartEnd
ENSE0000140986219741971974292
ENSE0000141373019720531972205
ENSE0000141645119740561974107
ENSE0000260627919785521982929
ENSE0000346756819758081975949
ENSE0000350027319773561977426
ENSE0000351408819775141977670
ENSE0000352334619753451975438
ENSE0000353818019755291975710
ENSE0000353960819770541977284
ENSE0000357005319762111976314
ENSE0000357676619768141976961
ENSE0000359175719779581978061
ENSE0000359687019751871975262
ENSE0000360084119783131978471
ENSE0000360226819781491978220
ENSE0000362732519749281975098
ENSE0000363768419760561976114
ENSE0000366127919745381974679
ENSE0000366412619747631974847
ENSE0000368034319777421977800
ENSE0000369414519743761974423

Expression profiles

Bgee: expression breadth ubiquitous, 247 present calls, max score 94.10.

FANTOM5 (CAGE): breadth ubiquitous, TPM avg 26.7314 / max 284.4786, expressed in 1804 samples.

FANTOM5 promoters (1 alternative TSS)

Promoter IDTPM avgSamples expressed
15214826.73141804

Top tissues by expression

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

TissueAnatomy IDExpression scoreQuality
right testisUBERON:000453494.10gold quality
left testisUBERON:000453393.73gold quality
lower esophagus mucosaUBERON:003583493.34gold quality
gastrocnemiusUBERON:000138892.46gold quality
apex of heartUBERON:000209892.16gold quality
hindlimb stylopod muscleUBERON:000425292.13gold quality
skin of legUBERON:000151191.98gold quality
muscle of legUBERON:000138391.24gold quality
skin of abdomenUBERON:000141691.24gold quality
testisUBERON:000047391.12gold quality
ectocervixUBERON:001224990.57gold quality
mucosa of transverse colonUBERON:000499190.33gold quality
esophagus mucosaUBERON:000246990.30gold quality
right lobe of thyroid glandUBERON:000111989.59gold quality
body of stomachUBERON:000116189.53gold quality
adenohypophysisUBERON:000219689.50gold quality
body of uterusUBERON:000985389.49gold quality
right ovaryUBERON:000211889.39gold quality
esophagusUBERON:000104389.37gold quality
left uterine tubeUBERON:000130389.35gold quality
esophagogastric junction muscularis propriaUBERON:003584189.23gold quality
granulocyteCL:000009489.07gold quality
lower esophagusUBERON:001347389.03gold quality
lower esophagus muscularis layerUBERON:003583389.02gold quality
body of pancreasUBERON:000115088.99gold quality
minor salivary glandUBERON:000183088.97gold quality
right lobe of liverUBERON:000111488.96gold quality
zone of skinUBERON:000001488.92gold quality
left lobe of thyroid glandUBERON:000112088.81gold quality
left coronary arteryUBERON:000162688.61gold quality

Single-cell (SCXA)

Detected in 1 experiment(s), a significant marker in 1.

ExperimentMarker?Max mean expression
E-ANND-3no0.00

Regulation

Is transcription factor: no

Functional genomics

DepMap (CRISPR cell-line fitness): dependent in 97.8% of screened cell lines, common-essential.

Cross-species orthologs

5 orthologs

OrganismSymbolGene ID
danio_reriotbl3ENSDARG00000052344
mus_musculusTbl3ENSMUSG00000040688
rattus_norvegicusTbl3ENSRNOG00000013429
drosophila_melanogasterCG1671FBGN0033454
caenorhabditis_elegansWBGENE00013143

Paralogs (1): GNB1L (ENSG00000185838)

Protein

Protein identifiers

Transducin beta-like protein 3Q12788 (reviewed: Q12788)

Alternative names: WD repeat-containing protein SAZD

All UniProt accessions (3): Q12788, H3BN88, J3KNP2

UniProt curated annotations — full annotation on UniProt →

Function. Part of the small subunit (SSU) processome, first precursor of the small eukaryotic ribosomal subunit. During the assembly of the SSU processome in the nucleolus, many ribosome biogenesis factors, an RNA chaperone and ribosomal proteins associate with the nascent pre-rRNA and work in concert to generate RNA folding, modifications, rearrangements and cleavage as well as targeted degradation of pre-ribosomal RNA by the RNA exosome.

Subunit / interactions. Part of the small subunit (SSU) processome, composed of more than 70 proteins and the RNA chaperone small nucleolar RNA (snoRNA) U3.

Subcellular location. Nucleus. Nucleolus.

RefSeq proteins (1): NP_006444* (*=MANE)

Domains & families (InterPro)

IDNameType
IPR001680WD40_rptRepeat
IPR011044Quino_amine_DH_bsuHomologous_superfamily
IPR013934Utp13_CDomain
IPR015943WD40/YVTN_repeat-like_dom_sfHomologous_superfamily
IPR019775WD40_repeat_CSConserved_site
IPR020472WD40_PAC1Repeat
IPR036322WD40_repeat_dom_sfHomologous_superfamily

Pfam: PF00400, PF08625

UniProt features (25 total): repeat 13, sequence conflict 4, sequence variant 3, modified residue 2, initiator methionine 1, chain 1, cross-link 1

Structure

Experimental structures (PDB)

3 structures.

PDBMethodResolution (Å)
7MQAELECTRON MICROSCOPY2.7
7MQ8ELECTRON MICROSCOPY3.6
7MQ9ELECTRON MICROSCOPY3.87

Predicted structure (AlphaFold)

ModelpLDDTFraction very-high
AF-Q12788-F184.480.32

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 (3): 2, 257, 407

Function

Pathways and Gene Ontology

Reactome pathways

5 pathways

IDPathway
R-HSA-6790901rRNA modification in the nucleus and cytosol
R-HSA-6791226Major pathway of rRNA processing in the nucleolus and cytosol
R-HSA-72312rRNA processing
R-HSA-8868773rRNA processing in the nucleus and cytosol
R-HSA-8953854Metabolism of RNA

MSigDB gene sets: 151 (showing top): GOBP_RIBOSOME_BIOGENESIS, GOBP_MATURATION_OF_SSU_RRNA, STEARMAN_LUNG_CANCER_EARLY_VS_LATE_DN, SHIPP_DLBCL_CURED_VS_FATAL_DN, MODULE_70, SCHUHMACHER_MYC_TARGETS_UP, AMIT_EGF_RESPONSE_120_HELA, GOBP_RIBOSOMAL_SMALL_SUBUNIT_BIOGENESIS, GOBP_MATURATION_OF_SSU_RRNA_FROM_TRICISTRONIC_RRNA_TRANSCRIPT_SSU_RRNA_5_8S_RRNA_LSU_RRNA, MODULE_48, MODULE_95, GOBP_RIBONUCLEOPROTEIN_COMPLEX_BIOGENESIS, BERENJENO_TRANSFORMED_BY_RHOA_UP, REACTOME_METABOLISM_OF_RNA, GOCC_90S_PRERIBOSOME

GO Biological Process (4): endonucleolytic cleavage to generate mature 5’-end of SSU-rRNA from (SSU-rRNA, 5.8S rRNA, LSU-rRNA) (GO:0000472), endonucleolytic cleavage in 5’-ETS of tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) (GO:0000480), ribosomal small subunit biogenesis (GO:0042274), rRNA processing (GO:0006364)

GO Molecular Function (3): RNA binding (GO:0003723), U3 snoRNA binding (GO:0034511), protein binding (GO:0005515)

GO Cellular Component (5): nucleoplasm (GO:0005654), nucleolus (GO:0005730), 90S preribosome (GO:0030686), small-subunit processome (GO:0032040), nucleus (GO:0005634)

Reactome top-level categories

Rollup of top-3 pathways:

CategoryPathways
rRNA processing in the nucleus and cytosol2
Metabolism of RNA1
rRNA processing1

GO top-level categories

Rollup of top GO terms by namespace:

CategoryTerms
maturation of SSU-rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA)2
endonucleolytic cleavage of tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA)2
ribosome biogenesis2
nuclear lumen2
preribosome2
t-UTP complex2
rRNA 5’-end processing1
ribonucleoprotein complex biogenesis1
RNA processing1
rRNA metabolic process1
nucleic acid binding1
snoRNA binding1
binding1
cellular anatomical structure1
intracellular membraneless organelle1
nucleolus1
nuclear protein-containing complex1
intracellular membrane-bounded organelle1

Protein interactions and networks

STRING

2553 interactions, top by confidence (×1000):

Protein AProtein BPartner UniProtScore
TBL3UTP18Q9Y5J1986
TBL3UTP6Q9NYH9981
TBL3PWP2Q15269949
TBL3WDR36Q8NI36934
TBL3WDR3Q9UNX4815
TBL3NOP58Q9Y2X3748
TBL3HEATR1Q9H583732
TBL3PWP1Q13610720
TBL3WDR43Q15061715
TBL3CUL4BQ13620708
TBL3NOP14P78316698
TBL3NOP56O00567694
TBL3NOL6Q9H6R4677
TBL3UTP14AQ9BVJ6668
TBL3DDB1Q16531664

IntAct

120 interactions, top by confidence:

ABTypeScore
CFTRESYT2psi-mi:“MI:2364”(proximity)0.710
APPBP2TBL3psi-mi:“MI:0915”(physical association)0.670
TBL3APPBP2psi-mi:“MI:0915”(physical association)0.670
NCBP2KPNA3psi-mi:“MI:0914”(association)0.640
C1DZFC3H1psi-mi:“MI:0914”(association)0.640
NOP53RRP8psi-mi:“MI:0914”(association)0.640
RPS14CCZ1Bpsi-mi:“MI:0914”(association)0.640
PWP2FBLpsi-mi:“MI:0914”(association)0.610
NPM1MPHOSPH10psi-mi:“MI:0914”(association)0.610
HSD3B2NARS1psi-mi:“MI:0914”(association)0.530
NRBM47psi-mi:“MI:0914”(association)0.530
MAGEB2POLRMTpsi-mi:“MI:0914”(association)0.530
RBM4NVLpsi-mi:“MI:0914”(association)0.530
RRP8MAGEB2psi-mi:“MI:0914”(association)0.530
EXOSC4ZFC3H1psi-mi:“MI:0914”(association)0.530
MPHOSPH6ZFC3H1psi-mi:“MI:0914”(association)0.530
RPL13RRP8psi-mi:“MI:0914”(association)0.530
FAIMWDR47psi-mi:“MI:0914”(association)0.500
TBL3NUDCpsi-mi:“MI:0915”(physical association)0.400
TBL3psi-mi:“MI:0915”(physical association)0.370
SFNTBL3psi-mi:“MI:0915”(physical association)0.370
Ruvbl1AAR2psi-mi:“MI:0914”(association)0.350
Srp72psi-mi:“MI:0914”(association)0.350
Rrbp1PIPSLpsi-mi:“MI:0914”(association)0.350
NOP56C12orf43psi-mi:“MI:0914”(association)0.350
HNRNPUpsi-mi:“MI:0914”(association)0.350

BioGRID (240): TBL3 (Two-hybrid), TBL3 (Affinity Capture-MS), TBL3 (Affinity Capture-MS), TBL3 (Affinity Capture-MS), TBL3 (Affinity Capture-MS), TBL3 (Affinity Capture-MS), TBL3 (Affinity Capture-MS), TBL3 (Affinity Capture-MS), TBL3 (Affinity Capture-MS), TBL3 (Affinity Capture-MS), TBL3 (Affinity Capture-MS), TBL3 (Two-hybrid), TBL3 (Two-hybrid), TBL3 (Affinity Capture-MS), AATF (Co-fractionation)

ESM2 similar proteins: A4FV98, A5PK51, A6NDG6, E1BE10, O00587, O35595, O95294, P60487, Q12788, Q17QS4, Q1JPJ0, Q2T9S4, Q2TBI8, Q32NY4, Q3T063, Q3ZBF9, Q501J2, Q5E9V4, Q5F4B1, Q5IS64, Q5SUV1, Q5T9C9, Q6AYG0, Q6AYR8, Q6XQN1, Q6XQN6, Q6ZMM2, Q80US4, Q8BNV1, Q8BZG5, Q8CC86, Q8IZ69, Q8N9H8, Q8NE01, Q8R2H9, Q8TCT1, Q8VCA8, Q8VD52, Q969S8, Q96AZ1

Diamond homologs: A1C7E4, A1CBP8, A1DDL6, A1DHW6, A2QCU8, A2R3Z3, A4RJV3, A6ZQL5, A6ZZZ8, A7ETB3, A7THX0, A7TNS8, A8PTE4, A8Q2R5, B0XTS1, B6GZA1, B6Q4Z5, B8M7Q5, B8NGT5, C5FP68, D1ZEB4, D4AM37, D4D8P3, O42937, P0CS44, P0CS45, P25387, P36130, P47025, Q01277, Q0CJD8, Q0CY32, Q0U2T3, Q12788, Q1DIW7, Q2H139, Q2U5Z8, Q2UFN8, Q4P8R5, Q4V837

SIGNOR signaling

1 interactions.

AEffectBMechanism
TBL3“form complex”“UTP-B complex”binding

Enriched among interaction partners

Reactome pathways and GO biological processes over-represented among this gene’s 145 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
Nuclear RNA decay722.7×5e-06
rRNA modification in the nucleus and cytosol815.8×6e-06
Major pathway of rRNA processing in the nucleolus and cytosol1912.3×3e-13
Nonsense-Mediated Decay (NMD)512.3×3e-03
rRNA processing in the nucleus and cytosol711.8×3e-04
SARS-CoV-1-host interactions611.1×1e-03
rRNA processing710.8×3e-04
Influenza Infection59.2×6e-03

GO biological processes:

GO termPartnersFoldFDR
ribosomal small subunit biogenesis1221.7×1e-10
ribosomal large subunit biogenesis621.1×8e-05
rRNA processing1415.7×1e-10
RNA processing813.9×3e-05
cytoplasmic translation710.3×8e-04

Disease & clinical

Clinical variants and AI predictions

ClinVar

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

ClassificationCount (floor)
Pathogenic1
Likely pathogenic0
Uncertain significance183
Likely benign13
Benign3

Top pathogenic / likely-pathogenic (1)

Variant IDHGVSClassification
2498682GRCh37/hg19 16p13.3(chr16:811896-2130379)x1Pathogenic

SpliceAI

3801 predictions. Top by Δscore:

VariantEffectΔscore
16:1972204:AAGT:Adonor_loss1.0000
16:1972205:AGTG:Adonor_loss1.0000
16:1972206:G:GGdonor_gain1.0000
16:1974050:TTCCA:Tacceptor_loss1.0000
16:1974051:TCCA:Tacceptor_loss1.0000
16:1974052:CCA:Cacceptor_loss1.0000
16:1974053:CAGC:Cacceptor_loss1.0000
16:1974054:A:AGacceptor_gain1.0000
16:1974054:A:Cacceptor_loss1.0000
16:1974055:G:Aacceptor_loss1.0000
16:1974055:G:GTacceptor_gain1.0000
16:1974055:GC:Gacceptor_gain1.0000
16:1974055:GCT:Gacceptor_gain1.0000
16:1974055:GCTA:Gacceptor_gain1.0000
16:1974055:GCTAT:Gacceptor_gain1.0000
16:1974104:ACAG:Adonor_loss1.0000
16:1974105:CAGGT:Cdonor_loss1.0000
16:1974108:G:Tdonor_loss1.0000
16:1974109:T:Gdonor_loss1.0000
16:1974193:CCA:Cacceptor_loss1.0000
16:1974194:CA:Cacceptor_loss1.0000
16:1974195:A:AGacceptor_gain1.0000
16:1974195:AGCT:Aacceptor_gain1.0000
16:1974195:AGCTG:Aacceptor_gain1.0000
16:1974196:G:GCacceptor_gain1.0000
16:1974196:GC:Gacceptor_gain1.0000
16:1974196:GCT:Gacceptor_gain1.0000
16:1974196:GCTG:Gacceptor_gain1.0000
16:1974196:GCTGG:Gacceptor_gain1.0000
16:1974198:T:Aacceptor_gain1.0000

AlphaMissense

5213 scored. Top likely-pathogenic:

VariantProtein changeam_pathogenicity
16:1976103:A:CS393R0.999
16:1976105:C:AS393R0.999
16:1976105:C:GS393R0.999
16:1977097:C:AA495D0.997
16:1977105:T:CS498P0.997
16:1977255:T:AW548R0.997
16:1977255:T:CW548R0.997
16:1977539:T:AW590R0.997
16:1977539:T:CW590R0.997
16:1975097:A:CS212R0.996
16:1975187:C:AS212R0.996
16:1975187:C:GS212R0.996
16:1976842:A:CS441R0.996
16:1976844:C:AS441R0.996
16:1976844:C:GS441R0.996
16:1977121:C:AA503D0.996
16:1977198:T:CF529L0.996
16:1977199:T:CF529S0.996
16:1977200:C:AF529L0.996
16:1977200:C:GF529L0.996
16:1977223:C:AA537D0.995
16:1977100:C:AT496K0.994
16:1977103:G:AG497D0.994
16:1977111:G:CD500H0.994
16:1977186:T:AW525R0.994
16:1977186:T:CW525R0.994
16:1977665:T:AW632R0.994
16:1977665:T:CW632R0.994
16:1978339:T:AW721R0.994
16:1978339:T:CW721R0.994

dbSNP variants (sampled 300 via entrez): RS1000316832 (16:1970698 G>A,C), RS1000429083 (16:1975255 T>C), RS1000521284 (16:1982785 C>T), RS1000621875 (16:1971176 A>G), RS1000667225 (16:1970909 T>G), RS1001300102 (16:1973254 C>A), RS1001437970 (16:1982394 G>A,C), RS1002240340 (16:1978958 C>G,T), RS1002264008 (16:1972336 G>A,C), RS1002507014 (16:1971243 T>C), RS1002509390 (16:1982895 G>A), RS1002701556 (16:1972125 G>A,T), RS1002841948 (16:1979724 T>G), RS1003101357 (16:1972232 G>A,C,T), RS1003527786 (16:1973429 G>A)

Disease associations

OMIM: gene MIM:605915 | disease phenotypes:

GenCC curated gene-disease

Mondo (0):

Orphanet (0):

HPO phenotypes

0 total (0 of 0 shown, HPO-id order):

GWAS associations

0 associations (top):

Drugs & pharmacology

Drug and pharmacology data

Is drug target: yes

ChEMBL targets (1): CHEMBL6067168 (SINGLE PROTEIN)

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

ChEMBL bioactivities

2 potent at pChembl≥5 of 2 total, top 2 by pChembl (potency: 10 = 0.1 nM, 6 = 1 µM).

pChemblTypeValueUnitMolecule
5.50Kd3142nMCHEMBL3752910
5.33ED504700nMCHEMBL3752910

PubChem BioAssay actives

1 with measured affinity, of 2 total; 1 most potent distinct compounds. Largely complementary to BindingDB; screening values are coarse (µM, 4 dp), so sub-nM hits tie at the floor.

CompoundAssayTypeValueUnit
4-methyl-3-[(1-methyl-6-pyridin-3-ylpyrazolo[3,4-d]pyrimidin-4-yl)amino]-N-[3-(trifluoromethyl)phenyl]benzamide2149948: Binding affinity to human TBL3 incubated for 45 mins by Kinobead based pull down assaykd3.1416uM

CTD chemical–gene interactions

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

ChemicalActions (top 5)PubMed papers
sodium arsenitedecreases expression, increases expression3
bisphenol Adecreases expression, decreases methylation2
Air Pollutantsaffects cotreatment, increases abundance, increases oxidation, affects expression2
Ozoneaffects cotreatment, increases oxidation, increases abundance, affects expression2
TAK-243increases sumoylation1
triphenyl phosphateaffects expression1
alpha-pineneincreases oxidation, increases abundance, affects cotreatment1
deoxynivalenolincreases expression1
beta-lapachonedecreases expression1
cobaltous chloridedecreases expression1
methacrylaldehydeaffects cotreatment, increases oxidation, increases abundance1
bisphenol Saffects expression1
(+)-JQ1 compounddecreases expression1
Sunitinibincreases expression1
Acetaminophendecreases expression1
Acroleinaffects cotreatment, increases oxidation, increases abundance1
Arsenicaffects methylation1
Cisplatindecreases expression1
Clozapineincreases expression1
Dichlorodiphenyl Dichloroethyleneincreases expression1
Dimethyl Sulfoxideincreases expression1
Ethyl Methanesulfonatedecreases expression1
Formaldehydedecreases expression1
Ivermectindecreases expression1
Methyl Methanesulfonatedecreases expression1
Ribonucleotidesaffects binding1
Seleniumincreases expression1
Smokedecreases expression1
Valproic Acidincreases methylation1
Cyclosporineincreases expression1

ChEMBL screening assays

1 unique, capped per target: 1 binding

Representative assays (with source publication via chembl_document):

Assay IDTypeDescriptionSource paper
CHEMBL5652990BindingBinding affinity to human TBL3 incubated for 45 mins by Kinobead based pull down assayNVP-BHG712: Effects of Regioisomers on the Affinity and Selectivity toward the EPHrin Family. — ChemMedChem

Clinical trials (associated diseases)

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

No linked Atlas pages yet — the cross-entity mesh grows as the corpus expands.