Seroatlas · Human Serome Atlas

OGA

Protein O-GlcNAcase

Also known as: MEA5, MGEA5, NCOAT, OGA_HUMAN

Cross-references: UniProt · Ensembl · Human Protein Atlas · GeneCards · NCBI Gene

Protein identityUniProt · HPA

UniProt accession
O60502
Gene
OGA
Ensembl
ENSG00000198408
Chromosome
10
Canonical length
916 aa
Protein class
Enzymes, Metabolic proteins, Predicted intracellular proteins
Subcellular location
Cytosol

OverviewNCBI Gene

The dynamic modification of cytoplasmic and nuclear proteins by O-linked N-acetylglucosamine (O-GlcNAc) addition and removal on serine and threonine residues is catalyzed by OGT (MIM 300255), which adds O-GlcNAc, and MGEA5, a glycosidase that removes O-GlcNAc modifications (Gao et al., 2001 [PubMed 11148210]).[supplied by OMIM, Mar 2008]

Canonical amino-acid sequenceUniProt

916 residues, UniProt reviewed canonical sequence.

>O60502|OGA
     1  MVQKESQATL EERESELSSN PAASAGASLE PPAAPAPGED NPAGAGGAAV AGAAGGARRF
    61  LCGVVEGFYG RPWVMEQRKE LFRRLQKWEL NTYLYAPKDD YKHRMFWREM YSVEEAEQLM
   121  TLISAAREYE IEFIYAISPG LDITFSNPKE VSTLKRKLDQ VSQFGCRSFA LLFDDIDHNM
   181  CAADKEVFSS FAHAQVSITN EIYQYLGEPE TFLFCPTEYC GTFCYPNVSQ SPYLRTVGEK
   241  LLPGIEVLWT GPKVVSKEIP VESIEEVSKI IKRAPVIWDN IHANDYDQKR LFLGPYKGRS
   301  TELIPRLKGV LTNPNCEFEA NYVAIHTLAT WYKSNMNGVR KDVVMTDSED STVSIQIKLE
   361  NEGSDEDIET DVLYSPQMAL KLALTEWLQE FGVPHQYSSR QVAHSGAKAS VVDGTPLVAA
   421  PSLNATTVVT TVYQEPIMSQ GAALSGEPTT LTKEEEKKQP DEEPMDMVVE KQEETDHKND
   481  NQILSEIVEA KMAEELKPMD TDKESIAESK SPEMSMQEDC ISDIAPMQTD EQTNKEQFVP
   541  GPNEKPLYTA EPVTLEDLQL LADLFYLPYE HGPKGAQMLR EFQWLRANSS VVSVNCKGKD
   601  SEKIEEWRSR AAKFEEMCGL VMGMFTRLSN CANRTILYDM YSYVWDIKSI MSMVKSFVQW
   661  LGCRSHSSAQ FLIGDQEPWA FRGGLAGEFQ RLLPIDGAND LFFQPPPLTP TSKVYTIRPY
   721  FPKDEASVYK ICREMYDDGV GLPFQSQPDL IGDKLVGGLL SLSLDYCFVL EDEDGICGYA
   781  LGTVDVTPFI KKCKISWIPF MQEKYTKPNG DKELSEAEKI MLSFHEEQEV LPETFLANFP
   841  SLIKMDIHKK VTDPSVAKSM MACLLSSLKA NGSRGAFCEV RPDDKRILEF YSKLGCFEIA
   901  KMEGFPKDVV ILGRSL

LocalizationUniProt · AlphaFold · HPA

Whether an antibody against OGA can act on the native protein depends on physical access: surface and secreted proteins are reachable by circulating antibodies, intracellular proteins usually are not.

Antibody reachability
Intracellular
Secreted
No
Transmembrane segments
0
Mean surface accessibility (rSASA)
0.34
Highest tissue expression
96 nTPM

Expression across tissuesHPA

Tissue

  • cerebellum: 96 nTPM
  • retina: 93 nTPM
  • bone marrow: 84 nTPM
  • basal ganglia: 76 nTPM
  • blood vessel: 74 nTPM
  • spleen: 72 nTPM

Single-cell type

  • adipocytes: 853 nCPM
  • neutrophils: 658 nCPM
  • neutrophil progenitors: 336 nCPM
  • proximal tubule cells: 280 nCPM
  • b-cells: 279 nCPM
  • brain inhibitory neurons: 262 nCPM

Immune cell

  • basophil: 14 nTPM
  • neutrophil: 14 nTPM
  • naive B-cell: 7.5 nTPM
  • eosinophil: 7.2 nTPM
  • memory B-cell: 6.6 nTPM
  • NK-cell: 6.6 nTPM

Brain region

  • cerebellum: 182 nTPM
  • hypothalamus: 151 nTPM
  • hippocampal formation: 146 nTPM
  • basal ganglia: 142 nTPM
  • cerebral cortex: 142 nTPM
  • amygdala: 135 nTPM

Genetic constraint and essentialitygnomAD · DepMap

Does the body need this protein intact? Low LOEUF or a strong DepMap dependency means loss or blockade of the protein is likely to be felt.

gnomAD LOEUF (loss-of-function intolerance)
0.32
gnomAD pLI
0.97
DepMap mean gene effect
-0.16
DepMap dependency class
selective

Cancer expressionTCGA

Across TCGA tumor cohorts, this protein is over-expressed in roughly 3% of surveyed tumor types (aggregate summary; per-cohort expression, alteration, and survival load in the interactive view).

OntologyGO

Biological processes

Molecular functions

Cellular components

Protein domainsUniProt · Pfam · InterPro

KeywordsUniProt

InteractionsUniProt · HPA

Protein binding partners of OGA in the human serome: UniProt-annotated complex subunits plus reported interactors. Each links to its own Seroatlas record.

Antibody and autoantibody relevanceSeroatlas analysis

Seroatlas reads OGA as an antibody target. Whether an autoantibody or antibody against OGA could matter depends on whether native OGA is physically reachable, whether the body needs it intact, and whether it acts in a disease-relevant tissue.

OGA is annotated as predominantly intracellular. Intracellular proteins are common autoantibody markers, becoming visible to the immune system after cell injury or altered processing, but are usually markers of disease rather than direct drivers.

Annotation status

The present source text does not explicitly label OGA as an autoantigen. Seroatlas presents hypothesis context only and does not manufacture a known-serology claim.

Canonical record: https://seroatlas.com/gene/OGA. Study-independent annotations aggregated from UniProt, Human Protein Atlas, PubMed, IEDB, Pfam, InterPro, Gene Ontology, AlphaFold, gnomAD, DepMap, ClinVar, TCGA. Catalog release seroatlas-reviewed-human-uniprot-20260313.

Seroatlas is the reference for exploring autoantibody and antibody serology at the human-protein level: the autoreactome and human serome, multiplex serology (HuProt, HuScan, VirScan, PhIP-Seq).

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