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 RYMFSRDKLocalizationUniProt · 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
- flagellated sperm motility
- glucose metabolic process
- glycolytic process
- positive regulation of glycolytic process
Molecular functions
Cellular components
Protein domainsUniProt · Pfam · InterPro
- Glyceraldehyde-3-phosphate dehydrogenase, type I
- Glyceraldehyde 3-phosphate dehydrogenase, NAD(P) binding domain
- Glyceraldehyde 3-phosphate dehydrogenase, catalytic domain
- Glyceraldehyde 3-phosphate dehydrogenase, active site
- Glyceraldehyde/Erythrose phosphate dehydrogenase family
- NAD(P)-binding domain superfamily
- Glyceraldehyde 3-phosphate dehydrogenase, NAD binding domain
- Glyceraldehyde 3-phosphate dehydrogenase, C-terminal domain
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.
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