MGARP

gene
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Also known as OSAPCESP-1HUMMR

Summary

MGARP (mitochondria localized glutamic acid rich protein, HGNC:29969) is a protein-coding gene on chromosome 4q31.1, encoding Protein MGARP (Q8TDB4). Plays a role in the trafficking of mitochondria along microtubules.

Predicted to be involved in several processes, including axonal transport; cellular response to gonadotropin-releasing hormone; and nervous system development. Located in mitochondrion.

Source: NCBI Gene 84709 — RefSeq curated summary.

At a glance

  • GWAS associations: 1
  • Clinical variants (ClinVar): 15 total — 1 likely-pathogenic
  • MANE Select transcript: NM_032623

Identifiers

Gene identifiers

FieldValue
HGNC IDHGNC:29969
Approved symbolMGARP
Namemitochondria localized glutamic acid rich protein
Location4q31.1
Locus typegene with protein product
StatusApproved
AliasesOSAP, CESP-1, HUMMR
Ensembl geneENSG00000137463
Ensembl biotypeprotein_coding
OMIM619684
Entrez84709

Gene structure

Transcript identifiers

Ensembl transcripts: 2 — 2 protein_coding

ENST00000398955, ENST00000962439

RefSeq mRNA: 1 — MANE Select: NM_032623 NM_032623

CCDS: CCDS43269

Canonical transcript exons

ENST00000398955 — 4 exons

ExonStartEnd
ENSE00001147363139280077139280225
ENSE00001535760139266165139267041
ENSE00003473118139268672139268765
ENSE00003527937139275289139275392

Expression profiles

Bgee: expression breadth ubiquitous, 165 present calls, max score 99.20.

FANTOM5 (CAGE): breadth broad, TPM avg 6.5970 / max 530.4827, expressed in 795 samples.

FANTOM5 promoters (3 alternative TSS)

Promoter IDTPM avgSamples expressed
540546.3171794
540550.175061
540560.104840

Top tissues by expression

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

TissueAnatomy IDExpression scoreQuality
adrenal tissueUBERON:001830399.20gold quality
right adrenal gland cortexUBERON:003582798.96gold quality
right adrenal glandUBERON:000123398.90gold quality
adrenal cortexUBERON:000123598.62gold quality
left adrenal gland cortexUBERON:003582598.59gold quality
left adrenal glandUBERON:000123498.50gold quality
adrenal glandUBERON:000236996.97gold quality
germinal epithelium of ovaryUBERON:000130495.22gold quality
parietal pleuraUBERON:000240092.75gold quality
ovaryUBERON:000099284.32gold quality
right ovaryUBERON:000211884.04gold quality
left ovaryUBERON:000211983.84gold quality
cerebellar hemisphereUBERON:000224582.79gold quality
cerebellar cortexUBERON:000212982.71gold quality
adenohypophysisUBERON:000219682.42gold quality
pituitary glandUBERON:000000782.14gold quality
cerebellumUBERON:000203781.98gold quality
right hemisphere of cerebellumUBERON:001489081.10gold quality
ascending aortaUBERON:000149678.53gold quality
stromal cell of endometriumCL:000225578.52gold quality
thoracic aortaUBERON:000151578.37gold quality
descending thoracic aortaUBERON:000234576.24gold quality
omental fat padUBERON:001041474.68gold quality
peritoneumUBERON:000235874.59gold quality
adipose tissue of abdominal regionUBERON:000780872.82gold quality
smooth muscle tissueUBERON:000113572.71gold quality
right coronary arteryUBERON:000162572.68gold quality
body of uterusUBERON:000985371.90gold quality
mucosa of paranasal sinusUBERON:000503071.62silver quality
hypothalamusUBERON:000189871.60gold quality

Single-cell (SCXA)

Detected in 3 experiment(s), a significant marker in 2.

ExperimentMarker?Max mean expression
E-MTAB-7316yes35.24
E-GEOD-137537yes30.09
E-ANND-3no0.00

Regulation

Is transcription factor: no

Upstream regulators (CollecTRI, top): ESR1, SP1

miRNA regulators (miRDB)

62 targeting MGARP, 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-3163100.0077.238605
HSA-MIR-485-3P99.9870.681585
HSA-MIR-539-3P99.9870.741616
HSA-MIR-548AA99.9670.643753
HSA-MIR-548AP-3P99.9670.643753
HSA-MIR-548T-3P99.9670.643753
HSA-MIR-590-3P99.9674.346478
HSA-MIR-55999.9572.283609
HSA-MIR-548AB99.9571.313488
HSA-MIR-548A-5P99.9471.273482
HSA-MIR-548AD-5P99.9471.233502
HSA-MIR-548AE-5P99.9471.233502
HSA-MIR-548AK99.9471.243488
HSA-MIR-548AM-5P99.9471.243488
HSA-MIR-548AP-5P99.9471.143489
HSA-MIR-548AQ-5P99.9471.343426
HSA-MIR-548AR-5P99.9471.283515
HSA-MIR-548AS-5P99.9471.223482
HSA-MIR-548AU-5P99.9471.243488
HSA-MIR-548AY-5P99.9471.233502
HSA-MIR-548B-5P99.9471.233502
HSA-MIR-548BB-5P99.9471.273509
HSA-MIR-548C-5P99.9471.243488
HSA-MIR-548D-5P99.9471.233502
HSA-MIR-548H-5P99.9471.243488
HSA-MIR-548I99.9471.253481
HSA-MIR-548J-5P99.9471.143489
HSA-MIR-548O-5P99.9471.243488
HSA-MIR-548W99.9471.243488
HSA-MIR-548Y99.9471.283514

Literature-anchored findings (GeneRIF, showing 5)

  • OSAP is prominently expressed in steroidogenic tissues; results suggest that OSAP is involved in steroidogenesis, potentially through its ability to maintain mitochondrial abundance and morphology (PMID:19325000)
  • Results identify a novel mitochondria protein, hypoxia up-regulated mitochondrial movement regulator (HUMMR), which is expressed in neurons and is markedly induced by hypoxia-inducible factor 1 alpha (HIF-1alpha). (PMID:19528298)
  • Results identify a mitochondria-localized glutamic acid-rich protein (MGARP/OSAP) as one of the highly expressed proteins in retina. (PMID:20107910)
  • The present study identified a proximal core sequence in the MGARP promoter that is composed of two enriched Sp1 binding motifs and established Sp1 as one major MGARP transactivator. (PMID:23209644)
  • MGARP overexpression caused both mitochondrial remodeling and cristae shaping, leading to the collapse of the mitochondrial network. The mitochondrial morphologies in MGARP-overexpressing cells were diverse; the cells became round or short, and their cristae were deformed and became discontinuous or circular. (PMID:31202457)

Cross-species orthologs

3 orthologs

OrganismSymbolGene ID
danio_reriomgarpaENSDARG00000071353
mus_musculusMgarpENSMUSG00000037161
rattus_norvegicusMgarpENSRNOG00000011923

Protein

Protein identifiers

Protein MGARPQ8TDB4 (reviewed: Q8TDB4)

Alternative names: Corneal endothelium-specific protein 1, Hypoxia up-regulated mitochondrial movement regulator protein, Mitochondria-localized glutamic acid-rich protein, Ovary-specific acidic protein

All UniProt accessions (1): Q8TDB4

UniProt curated annotations — full annotation on UniProt →

Function. Plays a role in the trafficking of mitochondria along microtubules. Regulates the kinesin-mediated axonal transport of mitochondria to nerve terminals along microtubules during hypoxia. Participates in the translocation of TRAK2/GRIF1 from the cytoplasm to the mitochondrion. Also plays a role in steroidogenesis through maintenance of mitochondrial abundance and morphology. Plays an inhibitory role during neocortex development by regulating mitochondrial morphology, distribution and motility in neocortical neurons.

Subunit / interactions. Interacts with RHOT1/Miro-1, TRAK1/OIP106 and TRAK2/GRIF1. Interacts with RHOT2/Miro-2.

Subcellular location. Mitochondrion. Mitochondrion outer membrane. Mitochondrion inner membrane.

Tissue specificity. Expressed in the brain, adrenal gland and corneal endothelium (CE). Expressed in steroid-producing cells of the ovary and testis (at protein level). Expressed in steroid-producing cells of the ovary and testis. Weakly expressed in placenta. Expressed in corneal endothelial cells.

RefSeq proteins (1): NP_116012* (*=MANE)

Domains & families (InterPro)

IDNameType
IPR026093MGARPFamily
IPR032773MGARP_NDomain

Pfam: PF14962

UniProt features (11 total): compositionally biased region 4, topological domain 2, chain 1, sequence conflict 1, transmembrane region 1, region of interest 1, sequence variant 1

Structure

Experimental structures (PDB)

0 structures.

Predicted structure (AlphaFold)

ModelpLDDTFraction very-high
AF-Q8TDB4-F155.280.04

Function

Pathways and Gene Ontology

Reactome pathways

0 pathways

MSigDB gene sets: 171 (showing top): GSE45365_CTRL_VS_MCMV_INFECTION_NK_CELL_DN, GOBP_DENDRITE_DEVELOPMENT, GOBP_RESPONSE_TO_NITROGEN_COMPOUND, BENPORATH_ES_WITH_H3K27ME3, GOBP_AXO_DENDRITIC_TRANSPORT, GOBP_CELLULAR_RESPONSE_TO_LIPID, GOBP_PROTEIN_TARGETING, GOBP_NEUROGENESIS, GOBP_ORGANELLE_TRANSPORT_ALONG_MICROTUBULE, GOBP_ESTABLISHMENT_OF_PROTEIN_LOCALIZATION_TO_ORGANELLE, GOBP_CELLULAR_RESPONSE_TO_OXYGEN_CONTAINING_COMPOUND, GOBP_FOREBRAIN_DEVELOPMENT, GOBP_NEGATIVE_REGULATION_OF_CELLULAR_COMPONENT_ORGANIZATION, GOBP_REGULATION_OF_MITOCHONDRION_ORGANIZATION, GOBP_REGULATION_OF_CELL_PROJECTION_ORGANIZATION

GO Biological Process (11): obsolete protein targeting to mitochondrion (GO:0006626), anterograde axonal transport (GO:0008089), retrograde axonal transport (GO:0008090), regulation of mitochondrion organization (GO:0010821), axonal transport of mitochondrion (GO:0019896), cerebral cortex development (GO:0021987), axon development (GO:0061564), cellular response to steroid hormone stimulus (GO:0071383), cellular response to hypoxia (GO:0071456), cellular response to gonadotropin-releasing hormone (GO:0097211), negative regulation of dendrite development (GO:2000171)

GO Molecular Function (1): protein binding (GO:0005515)

GO Cellular Component (5): mitochondrion (GO:0005739), mitochondrial outer membrane (GO:0005741), mitochondrial inner membrane (GO:0005743), axon cytoplasm (GO:1904115), membrane (GO:0016020)

GO top-level categories

Rollup of top GO terms by namespace:

CategoryTerms
axonal transport3
axon cytoplasm3
mitochondrial membrane2
mitochondrion organization1
regulation of organelle organization1
mitochondrion transport along microtubule1
pallium development1
anatomical structure development1
neuron projection development1
cellular response to hormone stimulus1
response to steroid hormone1
cellular response to lipid1
response to hypoxia1
cellular response to stress1
cellular response to decreased oxygen levels1
cellular response to peptide hormone stimulus1
response to gonadotropin-releasing hormone1
negative regulation of neuron projection development1
dendrite development1
regulation of dendrite development1
negative regulation of developmental process1
binding1
cytoplasm1
intracellular membrane-bounded organelle1
organelle outer membrane1
organelle inner membrane1
axon1
neuron projection cytoplasm1
cellular anatomical structure1

Protein interactions and networks

STRING

1036 interactions, top by confidence (×1000):

Protein AProtein BPartner UniProtScore
MGARPFAM228BP0C875450
MGARPSDHAF1A6NFY7435
MGARPTHOC7Q6I9Y2429
MGARPTRAK2O60296419
MGARPNFU1Q9UMS0408
MGARPTRAK1Q9UPV9391
MGARPSYBUQ9NX95381
MGARPCMSS1Q9BQ75379
MGARPMZF1P28698378
MGARPOR4D5Q8NGN0377
MGARPSNPHO15079371
MGARPST6GAL2Q96JF0371
MGARPSLC35G1Q2M3R5368
MGARPKIFBPQ96EK5364
MGARPRGCCQ9H4X1346

IntAct

106 interactions, top by confidence:

ABTypeScore
MGARPA2Mpsi-mi:“MI:0915”(physical association)0.560
MGARPAPBB2psi-mi:“MI:0915”(physical association)0.560
MGARPAPPpsi-mi:“MI:0915”(physical association)0.560
MGARPDNM2psi-mi:“MI:0915”(physical association)0.560
MGARPTOR1Apsi-mi:“MI:0915”(physical association)0.560
MGARPpsi-mi:“MI:0915”(physical association)0.560
MGARPMECP2psi-mi:“MI:0915”(physical association)0.560
PRKNMGARPpsi-mi:“MI:0915”(physical association)0.560
MGARPPMP22psi-mi:“MI:0915”(physical association)0.560
MGARPPSEN1psi-mi:“MI:0915”(physical association)0.560
PSEN2MGARPpsi-mi:“MI:0915”(physical association)0.560
MGARPSMN1psi-mi:“MI:0915”(physical association)0.560
MGARPOPTNpsi-mi:“MI:0915”(physical association)0.560
GDAP1MGARPpsi-mi:“MI:0915”(physical association)0.560
MGARPALS2psi-mi:“MI:0915”(physical association)0.560
SOD1MGARPpsi-mi:“MI:0915”(physical association)0.560
APPMGARPpsi-mi:“MI:0915”(physical association)0.560
SNCAMGARPpsi-mi:“MI:0915”(physical association)0.560
HTTMGARPpsi-mi:“MI:0915”(physical association)0.560
ATXN1MGARPpsi-mi:“MI:0915”(physical association)0.560

BioGRID (225): MGARP (Two-hybrid), MGARP (Affinity Capture-MS), RHOT1 (Affinity Capture-Western), RHOT2 (Affinity Capture-Western), TRAK2 (Affinity Capture-Western), TRAK1 (Affinity Capture-Western), MGARP (Affinity Capture-Western), MGARP (Affinity Capture-Western), MGARP (Co-fractionation), SDF4 (Co-fractionation), GRPEL1 (Co-fractionation), MGARP (Co-fractionation), FKBP10 (Co-fractionation), MGARP (Co-fractionation), RCN3 (Co-fractionation)

ESM2 similar proteins: A2TJV2, A6QLZ1, O15231, O75363, O75952, P19332, P20810, P24275, P24588, P27123, P27546, P27816, P36225, P49342, P51125, P62025, Q02952, Q16799, Q3T0A6, Q3ZB98, Q4R3X7, Q571C7, Q5FVI4, Q5IS59, Q5M7W5, Q5QD51, Q62394, Q64548, Q6FW26, Q6RJR6, Q710D7, Q7TT18, Q80YN3, Q811Q2, Q8BHB9, Q8C4A5, Q8GUP3, Q8K0T0, Q8N111, Q8TDB4

Diamond homologs: A6QLZ1, Q8TDB4, Q8VI64

SIGNOR signaling

0 interactions.

Enriched among interaction partners

Reactome pathways and GO biological processes over-represented among this gene’s 25 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.

GO biological processes:

GO termPartnersFoldFDR
adult locomotory behavior565.4×3e-06
negative regulation of neuron apoptotic process524.1×2e-04
positive regulation of apoptotic process717.3×1e-05
negative regulation of gene expression515.0×9e-04

Disease & clinical

Clinical variants and AI predictions

ClinVar

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

ClassificationCount (floor)
Pathogenic0
Likely pathogenic1
Uncertain significance11
Likely benign2
Benign0

Top pathogenic / likely-pathogenic (1)

Variant IDHGVSClassification
3338450GRCh37/hg19 4q31.1(chr4:140187697-140394334)x1Likely pathogenic

SpliceAI

700 predictions. Top by Δscore:

VariantEffectΔscore
4:139275287:A:ACdonor_gain1.0000
4:139275288:C:CCdonor_gain1.0000
4:139275391:TG:Tacceptor_gain1.0000
4:139275392:GCT:Gacceptor_loss1.0000
4:139275393:C:CCacceptor_gain1.0000
4:139275393:C:Tacceptor_loss1.0000
4:139268667:TTTA:Tdonor_loss0.9900
4:139268668:TTACC:Tdonor_loss0.9900
4:139268669:TACC:Tdonor_loss0.9900
4:139268670:A:Tdonor_loss0.9900
4:139268671:CCTT:Cdonor_loss0.9900
4:139268766:C:CCacceptor_gain0.9900
4:139275388:AGATG:Aacceptor_gain0.9900
4:139275389:GATG:Gacceptor_gain0.9900
4:139275390:ATG:Aacceptor_gain0.9900
4:139279888:A:ACdonor_gain0.9900
4:139279889:C:CCdonor_gain0.9900
4:139279891:T:TAdonor_gain0.9900
4:139280075:ACCGT:Adonor_gain0.9900
4:139280076:CCGTC:Cdonor_gain0.9900
4:139267039:CACCT:Cacceptor_loss0.9800
4:139267040:ACC:Aacceptor_loss0.9800
4:139267041:CC:Cacceptor_loss0.9800
4:139267044:T:TCacceptor_gain0.9800
4:139275308:A:ACdonor_gain0.9800
4:139275309:C:CCdonor_gain0.9800
4:139279892:C:Adonor_gain0.9800
4:139280066:T:TAdonor_gain0.9800
4:139267042:C:CCacceptor_gain0.9700
4:139267051:T:TCacceptor_gain0.9700

AlphaMissense

1540 scored. Top likely-pathogenic:

VariantProtein changeam_pathogenicity
4:139275304:A:CS57R0.998
4:139275304:A:TS57R0.998
4:139275306:T:GS57R0.998
4:139275302:G:TA58D0.996
4:139275308:A:TV56D0.996
4:139275299:C:TG59D0.995
4:139275318:C:GG53R0.994
4:139275317:C:TG53D0.993
4:139275314:A:TV54D0.992
4:139275311:G:TT55K0.989
4:139275320:A:TV52E0.989
4:139275296:C:TG60E0.986
4:139275300:C:GG59R0.986
4:139275303:C:GA58P0.986
4:139275311:G:CT55R0.985
4:139275323:A:TV51D0.985
4:139275294:A:CY61D0.984
4:139275297:C:GG60R0.984
4:139275297:C:TG60R0.984
4:139275326:A:TL50Q0.973
4:139268762:A:CY64D0.968
4:139275326:A:CL50R0.966
4:139268764:G:TA63D0.963
4:139275291:A:CY62D0.950
4:139280139:A:TV7D0.946
4:139275333:A:CY48D0.940
4:139275326:A:GL50P0.938
4:139275305:C:TS57N0.933
4:139275294:A:TY61N0.932
4:139280145:C:AR5M0.930

dbSNP variants (sampled 300 via entrez): RS1000293754 (4:139278962 G>C), RS1000327890 (4:139273510 CTTTTTTTTTTTTT>C,CTT,CTTT,CTTTT,CTTTTT,CTTTTTT,CTTTTTTTTT,CTTTTTTTTTT,CTTTTTTTTTTT,CTTTTTTTTTTTT,CTTTTTTTTTTTTTT,CTTTTTTTTTTTTTTT,CTTTTTTTTTTTTTTTT,CTTTTTTTTTTTTTTTTT,CTTTTTTTTTTTTTTTTTT,CTTTTTTTTTTTTTTTTTTT,CTTTTTTTTTTTTTTTTTTTT,CTTTTTTTTTTTTTTTTTTTTT,CTTTTTTTTTTTTTTTTTTTTTT,CTTTTTTTTTTTTTTTTTTTTTTT,CTTTTTTTTTTTTTTTTTTTTTTTTT,CTTTTTTTTTTTTTTTTTTTTTTTTTT,CTTTTTTTTTTTTTTTTTTTTTTTTTTT,CTTTTTTTTTTTTTTTTTTTTTTTTTTTTT), RS1000380191 (4:139273254 C>T), RS1000380717 (4:139266563 A>G), RS1000582062 (4:139279248 C>G,T), RS1000611732 (4:139279584 C>T), RS1000664751 (4:139272086 A>G), RS1000950358 (4:139267747 G>A), RS1002237315 (4:139275741 A>G,T), RS1002308080 (4:139281713 A>G,T), RS1002555266 (4:139275487 C>T), RS1002599956 (4:139282076 T>A), RS1002624603 (4:139276933 A>G), RS1002912917 (4:139275760 A>T), RS1002957863 (4:139271283 T>C)

Disease associations

OMIM: gene MIM:619684 | disease phenotypes: MIM:617787

GenCC curated gene-disease

Mondo (1): intellectual disability, autosomal dominant 50 (MONDO:0030916)

Orphanet (0):

HPO phenotypes

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

GWAS associations

1 associations (top):

StudyTraitp-value
GCST90000654_16Central corneal thickness4.000000e-11

EFO canonical traits (1, from GWAS)

EFO IDTrait name
EFO:0005213central corneal thickness

Drugs & pharmacology

Drug and pharmacology data

Is drug target: no

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

CTD chemical–gene interactions

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

ChemicalActions (top 5)PubMed papers
Valproic Acidaffects cotreatment, increases expression, affects expression7
Particulate Matterdecreases expression, increases abundance, affects cotreatment4
methylmercuric chloridedecreases expression, increases expression2
bisphenol Aincreases expression, affects cotreatment2
trichostatin Aincreases expression2
potassium chromate(VI)affects cotreatment, decreases expression2
entinostatincreases expression, affects cotreatment2
Air Pollutantsdecreases expression, increases abundance2
Arsenicaffects methylation, affects cotreatment, decreases expression, increases abundance2
Phenylmercuric Acetateaffects cotreatment, decreases expression2
Tretinoinincreases expression2
aristolochic acid Iincreases expression1
alpha phellandreneincreases expression1
propionaldehydeincreases expression1
mono-(2-ethylhexyl)phthalatedecreases expression1
sodium arseniteaffects cotreatment, decreases expression, increases abundance1
cobaltous chloridedecreases expression1
butyraldehydeincreases expression1
manganese chlorideaffects cotreatment, decreases expression, increases abundance1
nickel sulfateincreases expression1
isobutyl alcoholincreases abundance, affects cotreatment, decreases expression1
mercuric bromideaffects cotreatment, decreases expression1
epigallocatechin gallateaffects cotreatment, decreases expression1
pentanalincreases expression1
chromium hexavalent iondecreases expression1
perfluorooctane sulfonic aciddecreases expression1
4-(5-benzo(1,3)dioxol-5-yl-4-pyridin-2-yl-1H-imidazol-2-yl)benzamideaffects cotreatment, increases expression, decreases expression1
dorsomorphindecreases expression, affects cotreatment, increases expression1
licochalcone Bincreases expression1
bisphenol Saffects cotreatment, increases methylation1

Clinical trials (associated diseases)

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