Seroatlas · Human Serome Atlas

AFG2A

ATPase family gene 2 protein homolog A

Also known as: AFG2, AFG2A_HUMAN, SPAF, SPATA5

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

Protein identityUniProt · HPA

UniProt accession
Q8NB90
Gene
AFG2A
Ensembl
ENSG00000145375
Chromosome
4
Canonical length
893 aa
Protein class
Disease related genes, Enzymes, Human disease related genes, Potential drug targets, Predicted intracellular proteins
Subcellular location
Cytosol

OverviewNCBI Gene

This gene encodes a member of the ATPase associated with diverse activities family, whose members are defined by a highly conserved ATPase domain. Members of this family participate in diverse cellular processes that include membrane fusion, DNA replication, microtubule severing, and protein degradation. The protein encoded by this gene has a putative mitochondrial targeting sequence and has been proposed to function in maintenance of mitochondrial function and integrity during mouse spermatogenesis. Allelic variants in this gene have been associated with epilepsy, hearing loss, and cognitive disability syndrome. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Sep 2016]

Canonical amino-acid sequenceUniProt

893 residues, UniProt reviewed canonical sequence.

>Q8NB90|AFG2A
     1  MSSKKNRKRL NQSAENGSSL PSAASSCAEA RAPSAGSDFA ATSGTLTVTN LLEKVDDKIP
    61  KTFQNSLIHL GLNTMKSANI CIGRPVLLTS LNGKQEVYTA WPMAGFPGGK VGLSEMAQKN
   121  VGVRPGDAIQ VQPLVGAVLQ AEEMDVALSD KDMEINEEEL TGCILRKLDG KIVLPGNFLY
   181  CTFYGRPYKL QVLRVKGADG MILGGPQSDS DTDAQRMAFE QSSMETSSLE LSLQLSQLDL
   241  EDTQIPTSRS TPYKPIDDRI TNKASDVLLD VTQSPGDGSG LMLEEVTGLK CNFESAREGN
   301  EQLTEEERLL KFSIGAKCNT DTFYFISSTT RVNFTEIDKN SKEQDNQFKV TYDMIGGLSS
   361  QLKAIREIIE LPLKQPELFK SYGIPAPRGV LLYGPPGTGK TMIARAVANE VGAYVSVING
   421  PEIISKFYGE TEAKLRQIFA EATLRHPSII FIDELDALCP KREGAQNEVE KRVVASLLTL
   481  MDGIGSEVSE GQVLVLGATN RPHALDAALR RPGRFDKEIE IGVPNAQDRL DILQKLLRRV
   541  PHLLTEAELL QLANSAHGYV GADLKVLCNE AGLCALRRIL KKQPNLPDVK VAGLVKITLK
   601  DFLQAMNDIR PSAMREIAID VPNVSWSDIG GLESIKLKLE QAVEWPLKHP ESFIRMGIQP
   661  PKGVLLYGPP GCSKTMIAKA LANESGLNFL AIKGPELMNK YVGESERAVR ETFRKARAVA
   721  PSIIFFDELD ALAVERGSSL GAGNVADRVL AQLLTEMDGI EQLKDVTILA ATNRPDRIDK
   781  ALMRPGRIDR IIYVPLPDAA TRREIFKLQF HSMPVSNEVD LDELILQTDA YSGAEIVAVC
   841  REAALLALEE DIQANLIMKR HFTQALSTVT PRIPESLRRF YEDYQEKSGL HTL

LocalizationUniProt · AlphaFold · HPA

Whether an antibody against AFG2A 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)
0.36
Highest tissue expression
3.4 nTPM

Expression across tissuesHPA

Tissue

  • testis: 3.4 nTPM
  • stomach: 2.2 nTPM
  • retina: 2.1 nTPM
  • thymus: 1.9 nTPM
  • breast: 1.6 nTPM
  • adipose tissue: 1.4 nTPM

Single-cell type

  • early spermatids: 263 nCPM
  • microglia: 241 nCPM
  • late primary spermatocytes: 230 nCPM
  • megakaryocyte progenitors: 203 nCPM
  • erythrocyte progenitors: 186 nCPM
  • cone photoreceptor cells: 178 nCPM

Immune cell

  • plasmacytoid DC: 0.7 nTPM
  • gdT-cell: 0.6 nTPM
  • intermediate monocyte: 0.6 nTPM
  • basophil: 0.5 nTPM
  • memory B-cell: 0.5 nTPM
  • memory CD4 T-cell: 0.5 nTPM

Brain region

  • cerebellum: 6.6 nTPM
  • choroid plexus: 4.7 nTPM
  • hypothalamus: 4.7 nTPM
  • medulla oblongata: 4.7 nTPM
  • pons: 4.7 nTPM
  • white matter: 4.6 nTPM

DiseaseUniProt · ClinVar · IEDB · PubMed

Four sources answering four different questions about AFG2A.

Disease | AllUniProt

Conditions AFG2A is implicated in, by any mechanism.

Disease | GeneticClinVar

100 pathogenic / likely-pathogenic of 911 ClinVar records.

Conditions with pathogenic or likely-pathogenic variants.

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)
1.08
gnomAD pLI
0
DepMap mean gene effect
-0.77
DepMap dependency class
common

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 AFG2A 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 AFG2A as an antibody target. Whether an autoantibody or antibody against AFG2A could matter depends on whether native AFG2A is physically reachable, whether the body needs it intact, and whether it acts in a disease-relevant tissue.

AFG2A 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 AFG2A as an autoantigen. Seroatlas presents hypothesis context only and does not manufacture a known-serology claim.

Canonical record: https://seroatlas.com/gene/AFG2A. 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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