PGK2
Phosphoglycerate kinase 2
Also known as: PGK-2, PGK2_HUMAN, PGKPS
Cross-references: UniProt · Ensembl · Human Protein Atlas · GeneCards · NCBI Gene
Protein identityUniProt · HPA
- UniProt accession
- P07205
- Gene
- PGK2
- Ensembl
- ENSG00000170950
- Chromosome
- 6
- Canonical length
- 417 aa
- Protein class
- Enzymes, Metabolic proteins, Plasma proteins, Predicted intracellular proteins
- Subcellular location
- Mid piece,Principal piece,End piece
OverviewNCBI Gene
This gene is intronless, arose via retrotransposition of the phosphoglycerate kinase 1 gene, and is expressed specifically in the testis. Initially assumed to be a pseudogene, the encoded protein is actually a functional phosphoglycerate kinase that catalyzes the reversible conversion of 1,3-bisphosphoglycerate to 3-phosphoglycerate, during the Embden-Meyerhof-Parnas pathway of glycolysis, in the later stages of spermatogenesis.[provided by RefSeq, May 2010]
Canonical amino-acid sequenceUniProt
417 residues, UniProt reviewed canonical sequence.
>P07205|PGK2
1 MSLSKKLTLD KLDVRGKRVI MRVDFNVPMK KNQITNNQRI KASIPSIKYC LDNGAKAVVL
61 MSHLGRPDGV PMPDKYSLAP VAVELKSLLG KDVLFLKDCV GAEVEKACAN PAPGSVILLE
121 NLRFHVEEEG KGQDPSGKKI KAEPDKIEAF RASLSKLGDV YVNDAFGTAH RAHSSMVGVN
181 LPHKASGFLM KKELDYFAKA LENPVRPFLA ILGGAKVADK IQLIKNMLDK VNEMIIGGGM
241 AYTFLKVLNN MEIGASLFDE EGAKIVKDIM AKAQKNGVRI TFPVDFVTGD KFDENAQVGK
301 ATVASGISPG WMGLDCGPES NKNHAQVVAQ ARLIVWNGPL GVFEWDAFAK GTKALMDEIV
361 KATSKGCITV IGGGDTATCC AKWNTEDKVS HVSTGGGASL ELLEGKILPG VEALSNMLocalizationUniProt · AlphaFold · HPA
Whether an antibody against PGK2 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)
- 0.23
- Highest tissue expression
- 187 nTPM
Expression across tissuesHPA
Tissue
- testis: 187 nTPM
- epididymis: 0.3 nTPM
- breast: 0.1 nTPM
- prostate: 0.1 nTPM
- adipose tissue: 0 nTPM
- adrenal gland: 0 nTPM
Single-cell type
- late spermatids: 4,752 nCPM
- early spermatids: 1,125 nCPM
- late primary spermatocytes: 851 nCPM
- sertoli cells: 12 nCPM
- leydig cells: 8.7 nCPM
- early primary spermatocytes: 7.7 nCPM
Immune cell
- basophil: 0 nTPM
- classical monocyte: 0 nTPM
- eosinophil: 0 nTPM
- gdT-cell: 0 nTPM
- intermediate monocyte: 0 nTPM
- MAIT T-cell: 0 nTPM
Brain region
- amygdala: 0 nTPM
- basal ganglia: 0 nTPM
- cerebellum: 0 nTPM
- cerebral cortex: 0 nTPM
- choroid plexus: 0 nTPM
- hippocampal formation: 0 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)
- 1.61
- gnomAD pLI
- 0
- gnomAD missense Z
- -0.92
- DepMap mean gene effect
- 0.11
- DepMap dependency class
- none
Cancer expressionTCGA
Across TCGA tumor cohorts, this protein is over-expressed in roughly 4% 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 PGK2 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 PGK2 as an antibody target. Whether an autoantibody or antibody against PGK2 could matter depends on whether native PGK2 is physically reachable, whether the body needs it intact, and whether it acts in a disease-relevant tissue.
PGK2 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 PGK2 as an autoantigen. Seroatlas presents hypothesis context only and does not manufacture a known-serology claim.
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