Seroatlas · Human Serome Atlas

PCDHB12

Protocadherin beta-12

Also known as: PCDBC_HUMAN, PCDH-BETA12

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

Protein identityUniProt · HPA

UniProt accession
Q9Y5F1
Gene
PCDHB12
Ensembl
ENSG00000120328
Chromosome
5
Canonical length
795 aa
Protein class
Predicted intracellular proteins, Predicted membrane proteins
Subcellular location
Plasma membrane

OverviewNCBI Gene

This gene is a member of the protocadherin beta gene cluster, one of three related gene clusters tandemly linked on chromosome five. The gene clusters demonstrate an unusual genomic organization similar to that of B-cell and T-cell receptor gene clusters. The beta cluster contains 16 genes and 3 pseudogenes, each encoding 6 extracellular cadherin domains and a cytoplasmic tail that deviates from others in the cadherin superfamily. The extracellular domains interact in a homophilic manner to specify differential cell-cell connections. Unlike the alpha and gamma clusters, the transcripts from these genes are made up of only one large exon, not sharing common 3' exons as expected. These neural cadherin-like cell adhesion proteins are integral plasma membrane proteins. Their specific functions are unknown but they most likely play a critical role in the establishment and function of specific cell-cell neural connections. [provided by RefSeq, Jul 2008]

Canonical amino-acid sequenceUniProt

795 residues, UniProt reviewed canonical sequence.

>Q9Y5F1|PCDHB12
     1  MENGGAGTLQ IRQVLLFFVL LGMSQAGSET GNFLVMEELQ SGSFVGNLAK TLGLEVSELS
    61  SRGARVVSND NKECLQLDTN TGDLLLREML DREELCGSNE PCVLYFQVLM KNPTQFLQIE
   121  LQVRDINDHS PVFLEKEMLL EIPENSPVGA VFLLESAKDL DVGINAVKSY TINPNSHFHV
   181  KIRVNPDNRK YPELVLDKAL DYEERPELSF ILTALDGGSP PRSGTALVRV VVVDINDNSP
   241  EFEQAFYEVK ILENSILGSL VVTVSAWDLD SGTNSELSYT FSHASEDIRK TFEINQKSGD
   301  ITLTAPLDFE AIESYSIIIQ ATDGGGLFGK STVRIQVMDV NDNAPEITVS SITSPIPENT
   361  PETVVMVFRI RDRDSGDNGK MVCSIPEDIP FVLKSSVNNY YTLETERPLD RESRAEYNIT
   421  ITVTDLGTPR LKTEHNITVL VSDVNDNAPA FTQTSYALFV RENNSPALHI GSISATDRDS
   481  GTNAQVNYSL LPSQDPHLPL ASLVSINADN GHLFALRSLD YEALQGFQFR VGATDHGSPA
   541  LSSEALVRVL VLDANDNSPF VLYPLQNGSA PCTELVPWAA EPGYLVTKVV AVDGDSGQNA
   601  WLSYQLLKAT EPGLFGVWAH NGEVRTARLL SERDAAKHRL VVLVKDNGEP PRSATATLHV
   661  LLVDGFSQPY LPLPEAAPAQ AQADSLTVYL VVALASVSSL FLFSVLLFVA VRLCRRSRAA
   721  PVGRCSVPEG PFPGHLVDVS GTGTLSQSYH YEVCVTGGSR SNKFKFLKPI IPNFLPQSTG
   781  SEVEENPPFQ NNLGF

LocalizationUniProt · AlphaFold · HPA

Whether an antibody against PCDHB12 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
Cell surface
Secreted
No
Transmembrane segments
1
Mean surface accessibility (rSASA)
0.37
Highest tissue expression
2.4 nTPM

Expression across tissuesHPA

Tissue

  • endometrium: 2.4 nTPM
  • ovary: 2 nTPM
  • blood vessel: 1.9 nTPM
  • cervix: 1.9 nTPM
  • pituitary gland: 1.9 nTPM
  • fallopian tube: 1.8 nTPM

Single-cell type

  • corticotrophs: 13 nCPM
  • lactotrophs: 7.6 nCPM
  • thymic myoid cells: 6.8 nCPM
  • hepatic stellate cells: 6.5 nCPM
  • gastric progenitor cells: 5.1 nCPM
  • pituitary stem cells: 4.9 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

  • cerebral cortex: 11 nTPM
  • cerebellum: 10 nTPM
  • white matter: 9.8 nTPM
  • hippocampal formation: 9.6 nTPM
  • basal ganglia: 8.8 nTPM
  • medulla oblongata: 8.8 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)
1.33
gnomAD pLI
0
gnomAD missense Z
-2.51
DepMap mean gene effect
0.12
DepMap dependency class
none

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

Molecular functions

Cellular components

Protein domainsUniProt · Pfam · InterPro

KeywordsUniProt

Antibody and autoantibody relevanceSeroatlas analysis

Seroatlas reads PCDHB12 as an antibody target. Whether an autoantibody or antibody against PCDHB12 could matter depends on whether native PCDHB12 is physically reachable, whether the body needs it intact, and whether it acts in a disease-relevant tissue.

PCDHB12 is annotated at the cell surface, where native PCDHB12 is exposed to circulating antibodies and is a prime autoantibody target that could block, deplete, or overstimulate it.

Annotation status

The present source text does not explicitly label PCDHB12 as an autoantigen. Seroatlas presents hypothesis context only and does not manufacture a known-serology claim.

Canonical record: https://seroatlas.com/gene/PCDHB12. 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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