Seroatlas · Human Serome Atlas

KLF12

Krueppel-like factor 12

Also known as: AP-2rep, AP2REP, HSPC122, KLF12_HUMAN

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

Protein identityUniProt · HPA

UniProt accession
Q9Y4X4
Gene
KLF12
Ensembl
ENSG00000118922
Chromosome
13
Canonical length
402 aa
Protein class
Predicted intracellular proteins, Transcription factors
Subcellular location
Nucleoplasm,Cytosol

OverviewNCBI Gene

Activator protein-2 alpha (AP-2 alpha) is a developmentally-regulated transcription factor and important regulator of gene expression during vertebrate development and carcinogenesis. The protein encoded by this gene is a member of the Kruppel-like zinc finger protein family and can repress expression of the AP-2 alpha gene by binding to a specific site in the AP-2 alpha gene promoter. Repression by the encoded protein requires binding with a corepressor, CtBP1. Two transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jul 2008]

Canonical amino-acid sequenceUniProt

402 residues, UniProt reviewed canonical sequence.

>Q9Y4X4|KLF12
     1  MNIHMKRKTI KNINTFENRM LMLDGMPAVR VKTELLESEQ GSPNVHNYPD MEAVPLLLNN
    61  VKGEPPEDSL SVDHFQTQTE PVDLSINKAR TSPTAVSSSP VSMTASASSP SSTSTSSSSS
   121  SRLASSPTVI TSVSSASSSS TVLTPGPLVA SASGVGGQQF LHIIHPVPPS SPMNLQSNKL
   181  SHVHRIPVVV QSVPVVYTAV RSPGNVNNTI VVPLLEDGRG HGKAQMDPRG LSPRQSKSDS
   241  DDDDLPNVTL DSVNETGSTA LSIARAVQEV HPSPVSRVRG NRMNNQKFPC SISPFSIEST
   301  RRQRRSESPD SRKRRIHRCD FEGCNKVYTK SSHLKAHRRT HTGEKPYKCT WEGCTWKFAR
   361  SDELTRHYRK HTGVKPFKCA DCDRSFSRSD HLALHRRRHM LV

LocalizationUniProt · AlphaFold · HPA

Whether an antibody against KLF12 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)
0.65
Highest tissue expression
11 nTPM

Expression across tissuesHPA

Tissue

  • lymph node: 11 nTPM
  • epididymis: 11 nTPM
  • thymus: 9.6 nTPM
  • tonsil: 9.3 nTPM
  • liver: 9.2 nTPM
  • retina: 8.2 nTPM

Single-cell type

  • myonuclei: 816 nCPM
  • t-cells: 703 nCPM
  • nk-cells: 691 nCPM
  • corticotrophs: 620 nCPM
  • thyrotrophs: 617 nCPM
  • oligodendrocyte progenitor cells: 607 nCPM

Immune cell

  • MAIT T-cell: 2.7 nTPM
  • memory CD8 T-cell: 2.5 nTPM
  • gdT-cell: 2.2 nTPM
  • naive CD8 T-cell: 2.1 nTPM
  • memory CD4 T-cell: 2 nTPM
  • NK-cell: 1.5 nTPM

Brain region

  • hippocampal formation: 18 nTPM
  • cerebellum: 18 nTPM
  • thalamus: 17 nTPM
  • cerebral cortex: 17 nTPM
  • midbrain: 16 nTPM
  • hypothalamus: 15 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)
0.29
gnomAD pLI
0.98
gnomAD missense Z
1.79
DepMap mean gene effect
0.07
DepMap dependency class
selective

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 KLF12 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 KLF12 as an antibody target. Whether an autoantibody or antibody against KLF12 could matter depends on whether native KLF12 is physically reachable, whether the body needs it intact, and whether it acts in a disease-relevant tissue.

KLF12 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 KLF12 as an autoantigen. Seroatlas presents hypothesis context only and does not manufacture a known-serology claim.

Canonical record: https://seroatlas.com/gene/KLF12. 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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