Seroatlas · Human Serome Atlas

ATPAF2

ATP synthase mitochondrial F1 complex assembly factor 2

Also known as: ATP12, Atp12p, ATPF2_HUMAN, LP3663, MGC29736

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

Protein identityUniProt · HPA

UniProt accession
Q8N5M1
Gene
ATPAF2
Ensembl
ENSG00000171953
Chromosome
17
Canonical length
289 aa
Protein class
Disease related genes, Human disease related genes, Predicted intracellular proteins
Subcellular location
Cytosol

OverviewNCBI Gene

This gene encodes an assembly factor for the F(1) component of the mitochondrial ATP synthase. This protein binds specifically to the F1 alpha subunit and is thought to prevent this subunit from forming nonproductive homooligomers during enzyme assembly. This gene is located within the Smith-Magenis syndrome region on chromosome 17. An alternatively spliced transcript variant has been described, but its biological validity has not been determined. [provided by RefSeq, Jul 2008]

Canonical amino-acid sequenceUniProt

289 residues, UniProt reviewed canonical sequence.

>Q8N5M1|ATPAF2
     1  MWRSCLRLRD GGRRLLNRPA GGPSASMSPG PTIPSPARAY APPTERKRFY QNVSITQGEG
    61  GFEINLDHRK LKTPQAKLFT VPSEALAIAV ATEWDSQQDT IKYYTMHLTT LCNTSLDNPT
   121  QRNKDQLIRA AVKFLDTDTI CYRVEEPETL VELQRNEWDP IIEWAEKRYG VEISSSTSIM
   181  GPSIPAKTRE VLVSHLASYN TWALQGIEFV AAQLKSMVLT LGLIDLRLTV EQAVLLSRLE
   241  EEYQIQKWGN IEWAHDYELQ ELRARTAAGT LFIHLCSEST TVKHKLLKE

LocalizationUniProt · AlphaFold · HPA

Whether an antibody against ATPAF2 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
Other membrane
Secreted
No
Transmembrane segments
0
Mean surface accessibility (rSASA)
0.35
Highest tissue expression
26 nTPM

Expression across tissuesHPA

Tissue

  • tongue: 26 nTPM
  • parathyroid gland: 25 nTPM
  • skeletal muscle: 23 nTPM
  • heart muscle: 22 nTPM
  • liver: 19 nTPM
  • choroid plexus: 18 nTPM

Single-cell type

  • early spermatids: 82 nCPM
  • adrenal medulla cells: 64 nCPM
  • late spermatids: 59 nCPM
  • hofbauer cells: 54 nCPM
  • esophageal apical cells: 51 nCPM
  • cone photoreceptor cells: 50 nCPM

Immune cell

  • myeloid DC: 49 nTPM
  • plasmacytoid DC: 42 nTPM
  • classical monocyte: 42 nTPM
  • intermediate monocyte: 29 nTPM
  • memory B-cell: 28 nTPM
  • non-classical monocyte: 23 nTPM

Brain region

  • hypothalamus: 13 nTPM
  • cerebral cortex: 12 nTPM
  • choroid plexus: 11 nTPM
  • pons: 11 nTPM
  • cerebellum: 11 nTPM
  • midbrain: 11 nTPM

DiseaseUniProt · ClinVar · IEDB · PubMed

Four sources answering four different questions about ATPAF2.

Disease | AllUniProt

Conditions ATPAF2 is implicated in, by any mechanism.

Disease | GeneticClinVar

3 pathogenic / likely-pathogenic of 245 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)
1.44
gnomAD pLI
0
gnomAD missense Z
0.69
DepMap mean gene effect
-0.01
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

Cellular components

Protein domainsUniProt · Pfam · InterPro

  • ATP12, ATP synthase F1-assembly protein
  • ATP12 orthogonal Bundle domain superfamily
  • ATP12, ATP synthase F1-assembly protein, N-terminal
  • ATP12 chaperone protein

KeywordsUniProt

InteractionsUniProt · HPA

Protein binding partners of ATPAF2 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 ATPAF2 as an antibody target. Whether an autoantibody or antibody against ATPAF2 could matter depends on whether native ATPAF2 is physically reachable, whether the body needs it intact, and whether it acts in a disease-relevant tissue.

ATPAF2 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 ATPAF2 as an autoantigen. Seroatlas presents hypothesis context only and does not manufacture a known-serology claim.

Canonical record: https://seroatlas.com/gene/ATPAF2. 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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