Seroatlas · Human Serome Atlas

GAPDHS

Glyceraldehyde-3-phosphate dehydrogenase, testis-specific

Also known as: G3PT_HUMAN, GAPD2, GAPDH-2, GAPDS

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

Protein identityUniProt · HPA

UniProt accession
O14556
Gene
GAPDHS
Ensembl
ENSG00000105679
Chromosome
19
Canonical length
408 aa
Protein class
Enzymes, Metabolic proteins, Plasma proteins, Predicted intracellular proteins
Subcellular location
Nucleoplasm,Centrosome,Principal piece
Quaternary structure
Homotetramer

OverviewNCBI Gene

This gene encodes a protein belonging to the glyceraldehyde-3-phosphate dehydrogenase family of enzymes that play an important role in carbohydrate metabolism. Like its somatic cell counterpart, this sperm-specific enzyme functions in a nicotinamide adenine dinucleotide-dependent manner to remove hydrogen and add phosphate to glyceraldehyde 3-phosphate to form 1,3-diphosphoglycerate. During spermiogenesis, this enzyme may play an important role in regulating the switch between different energy-producing pathways, and it is required for sperm motility and male fertility. [provided by RefSeq, Jul 2008]

Canonical amino-acid sequenceUniProt

408 residues, UniProt reviewed canonical sequence.

>O14556|GAPDHS
     1  MSKRDIVLTN VTVVQLLRQP CPVTRAPPPP EPKAEVEPQP QPEPTPVREE IKPPPPPLPP
    61  HPATPPPKMV SVARELTVGI NGFGRIGRLV LRACMEKGVK VVAVNDPFID PEYMVYMFKY
   121  DSTHGRYKGS VEFRNGQLVV DNHEISVYQC KEPKQIPWRA VGSPYVVEST GVYLSIQAAS
   181  DHISAGAQRV VISAPSPDAP MFVMGVNEND YNPGSMNIVS NASCTTNCLA PLAKVIHERF
   241  GIVEGLMTTV HSYTATQKTV DGPSRKAWRD GRGAHQNIIP ASTGAAKAVT KVIPELKGKL
   301  TGMAFRVPTP DVSVVDLTCR LAQPAPYSAI KEAVKAAAKG PMAGILAYTE DEVVSTDFLG
   361  DTHSSIFDAK AGIALNDNFV KLISWYDNEY GYSHRVVDLL RYMFSRDK

LocalizationUniProt · AlphaFold · HPA

Whether an antibody against GAPDHS 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)
0.33
Highest tissue expression
261 nTPM

Expression across tissuesHPA

Tissue

  • testis: 261 nTPM
  • skin: 13 nTPM
  • thyroid gland: 11 nTPM
  • lymph node: 6 nTPM
  • pancreas: 4.9 nTPM
  • spleen: 4.9 nTPM

Single-cell type

  • late spermatids: 14,190 nCPM
  • early spermatids: 2,188 nCPM
  • late primary spermatocytes: 522 nCPM
  • melanocytes: 156 nCPM
  • cardiomyocytes: 53 nCPM
  • epicardial cells: 39 nCPM

Immune cell

  • MAIT T-cell: 0.3 nTPM
  • memory CD8 T-cell: 0.3 nTPM
  • naive B-cell: 0.3 nTPM
  • eosinophil: 0.2 nTPM
  • myeloid DC: 0.2 nTPM
  • naive CD4 T-cell: 0.2 nTPM

Brain region

  • white matter: 9.8 nTPM
  • basal ganglia: 9.5 nTPM
  • cerebellum: 9.1 nTPM
  • cerebral cortex: 8.2 nTPM
  • thalamus: 8 nTPM
  • hypothalamus: 7.8 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)
0.81
gnomAD pLI
0
gnomAD missense Z
0.34
DepMap mean gene effect
-0.04
DepMap dependency class
selective

Cancer expressionTCGA

Across TCGA tumor cohorts, this protein is over-expressed in roughly 5% 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 GAPDHS 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 GAPDHS as an antibody target. Whether an autoantibody or antibody against GAPDHS could matter depends on whether native GAPDHS is physically reachable, whether the body needs it intact, and whether it acts in a disease-relevant tissue.

GAPDHS 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 GAPDHS as an autoantigen. Seroatlas presents hypothesis context only and does not manufacture a known-serology claim.

Canonical record: https://seroatlas.com/gene/GAPDHS. 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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