Seroatlas · Human Serome Atlas

FRMPD4

FERM and PDZ domain-containing protein 4

Also known as: FRPD4_HUMAN, KIAA0316, PDZD10, PDZK10

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

Protein identityUniProt · HPA

UniProt accession
Q14CM0
Gene
FRMPD4
Ensembl
ENSG00000169933
Chromosome
X
Canonical length
1322 aa
Protein class
Disease related genes, Human disease related genes, Predicted intracellular proteins

OverviewNCBI Gene

This gene encodes a multi-domain (WW, PDZ, FERM) containing protein. Through its interaction with other proteins (such as PSD-95), it functions as a positive regulator of dendritic spine morphogenesis and density, and is required for the maintenance of excitatory synaptic transmission. [provided by RefSeq, Jan 2010]

Canonical amino-acid sequenceUniProt

1322 residues, UniProt reviewed canonical sequence.

>Q14CM0|FRMPD4
     1  MDVFSFVKIA KLSSHRTKSS GWPPPSGTWG LSQVPPYGWE MTANRDGRDY FINHMTQAIP
    61  FDDPRLESCQ IIPPAPRKVE MRRDPVLGFG FVAGSEKPVV VRSVTPGGPS EGKLIPGDQI
   121  VMINDEPVSA APRERVIDLV RSCKESILLT VIQPYPSPKS AFISAAKKAR LKSNPVKVRF
   181  SEEVIINGQV SETVKDNSLL FMPNVLKVYL ENGQTKSFRF DCSTSIKDVI LTLQEKLSIK
   241  GIEHFSLMLE QRTEGAGTKL LLLHEQETLT QVTQRPSSHK MRCLFRISFV PKDPIDLLRR
   301  DPVAFEYLYV QSCNDVVQER FGPELKYDIA LRLAALQMYI ATVTTKQTQK ISLKYIEKEW
   361  GLETFLPSAV LQSMKEKNIK KALSHLVKAN QNLVPPGKKL SALQAKVHYL KFLSDLRLYG
   421  GRVFKATLVQ AEKRSEVTLL VGPRYGISHV INTKTNLVAL LADFSHVNRI EMFSEEESLV
   481  RVELHVLDVK PITLLMESSD AMNLACLTAG YYRLLVDSRR SIFNMANKKN TATQETGPEN
   541  KGKHNLLGPD WNCIPQMTTF IGEGEQEAQI TYIDSKQKTV EITDSTMCPK EHRHLYIDNA
   601  YSSDGLNQQL SQPGEAPCEA DYRSLAQRSL LTLSGPETLK KAQESPRGAK VSFIFGDFAL
   661  DDGISPPTLG YETLLDEGPE MLEKQRNLYI GSANDMKGLD LTPEAEGIQF VENSVYANIG
   721  DVKSFQAAEG IEEPLLHDIC YAENTDDAED EDEVSCEEDL VVGEMNQPAI LNLSGSSDDI
   781  IDLTSLPPPE GDDNEDDFLL RSLNMAIAAP PPGFRDSSDE EDSQSQAASF PEDKEKGSSL
   841  QNDEIPVSLI DAVPTSAEGK CEKGLDNAVV STLGALEALS VSEEQQTSDN SGVAILRAYS
   901  PESSSDSGNE TNSSEMTESS ELATAQKQSE NLSRMFLATH EGYHPLAEEQ TEFPASKTPA
   961  GGLPPKSSHA LAARPATDLP PKVVPSKQLL HSDHMEMEPE TMETKSVTDY FSKLHMGSVA
  1021  YSCTSKRKSK LADGEGKAPP NGNTTGKKQQ GTKTAEMEEE ASGKFGTVSS RDSQHLSTFN
  1081  LERTAFRKDS QRWYVATEGG MAEKSGLEAA TGKTFPRASG LGAREAEGKE EGAPDGETSD
  1141  GSGLGQGDRF LTDVTCASSA KDLDNPEDAD SSTCDHPSKL PEADESVARL CDYHLAKRMS
  1201  SLQSEGHFSL QSSQGSSVDA GCGTGSSGSA CATPVESPLC PSLGKHLIPD ASGKGVNYIP
  1261  SEERAPGLPN HGATFKELHP QTEGMCPRMT VPALHTAINT EPLFGTLRDG CHRLPKIKET
  1321  TV

LocalizationUniProt · AlphaFold · HPA

Whether an antibody against FRMPD4 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)
0.56
Highest tissue expression
9.6 nTPM

Expression across tissuesHPA

Tissue

  • parathyroid gland: 9.6 nTPM
  • cerebral cortex: 8.6 nTPM
  • basal ganglia: 4.2 nTPM
  • retina: 3.9 nTPM
  • hippocampal formation: 2.7 nTPM
  • amygdala: 2.4 nTPM

Single-cell type

  • retinal horizontal cells: 2,997 nCPM
  • brain inhibitory neurons: 1,038 nCPM
  • brain excitatory neurons: 702 nCPM
  • ependymal cells: 333 nCPM
  • other brain neurons: 332 nCPM
  • choroid plexus epithelial cells: 306 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: 35 nTPM
  • basal ganglia: 24 nTPM
  • white matter: 22 nTPM
  • thalamus: 21 nTPM
  • hippocampal formation: 20 nTPM
  • midbrain: 15 nTPM

DiseaseUniProt · ClinVar · IEDB · PubMed

Four sources answering four different questions about FRMPD4.

Disease | AllUniProt

Conditions FRMPD4 is implicated in, by any mechanism.

Disease | GeneticClinVar

20 pathogenic / likely-pathogenic of 570 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)
0.08
gnomAD pLI
1
gnomAD missense Z
1.95
DepMap mean gene effect
0.04
DepMap dependency class
none

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 FRMPD4 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 FRMPD4 as an antibody target. Whether an autoantibody or antibody against FRMPD4 could matter depends on whether native FRMPD4 is physically reachable, whether the body needs it intact, and whether it acts in a disease-relevant tissue.

FRMPD4 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 FRMPD4 as an autoantigen. Seroatlas presents hypothesis context only and does not manufacture a known-serology claim.

Canonical record: https://seroatlas.com/gene/FRMPD4. 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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