Seroatlas · Human Serome Atlas

PDCD4

Programmed cell death protein 4

Also known as: H731, PDCD4_HUMAN

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

Protein identityUniProt · HPA

UniProt accession
Q53EL6
Gene
PDCD4
Ensembl
ENSG00000150593
Chromosome
10
Canonical length
469 aa
Protein class
Predicted intracellular proteins
Subcellular location
Nucleoplasm

OverviewNCBI Gene

This gene is a tumor suppressor and encodes a protein that binds to the eukaryotic translation initiation factor 4A1 and inhibits its function by preventing RNA binding. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Dec 2010]

Canonical amino-acid sequenceUniProt

469 residues, UniProt reviewed canonical sequence.

>Q53EL6|PDCD4
     1  MDVENEQILN VNPADPDNLS DSLFSGDEEN AGTEEIKNEI NGNWISASSI NEARINAKAK
    61  RRLRKNSSRD SGRGDSVSDS GSDALRSGLT VPTSPKGRLL DRRSRSGKGR GLPKKGGAGG
   121  KGVWGTPGQV YDVEEVDVKD PNYDDDQENC VYETVVLPLD ERAFEKTLTP IIQEYFEHGD
   181  TNEVAEMLRD LNLGEMKSGV PVLAVSLALE GKASHREMTS KLLSDLCGTV MSTTDVEKSF
   241  DKLLKDLPEL ALDTPRAPQL VGQFIARAVG DGILCNTYID SYKGTVDCVQ ARAALDKATV
   301  LLSMSKGGKR KDSVWGSGGG QQSVNHLVKE IDMLLKEYLL SGDISEAEHC LKELEVPHFH
   361  HELVYEAIIM VLESTGESTF KMILDLLKSL WKSSTITVDQ MKRGYERIYN EIPDINLDVP
   421  HSYSVLERFV EECFQAGIIS KQLRDLCPSR GRKRFVSEGD GGRLKPESY

LocalizationUniProt · AlphaFold · HPA

Whether an antibody against PDCD4 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)
0.42
Highest tissue expression
477 nTPM

Expression across tissuesHPA

Tissue

  • pancreas: 477 nTPM
  • parathyroid gland: 267 nTPM
  • salivary gland: 240 nTPM
  • colon: 148 nTPM
  • thyroid gland: 145 nTPM
  • esophagus: 142 nTPM

Single-cell type

  • pituicytes/fscs: 1,128 nCPM
  • syncytiotrophoblasts: 1,128 nCPM
  • salivary acinar cells: 876 nCPM
  • lacrimal acinar cells: 770 nCPM
  • pancreatic acinar cells: 764 nCPM
  • esophageal apical cells: 644 nCPM

Immune cell

  • basophil: 186 nTPM
  • MAIT T-cell: 96 nTPM
  • NK-cell: 85 nTPM
  • memory CD8 T-cell: 60 nTPM
  • memory B-cell: 54 nTPM
  • gdT-cell: 54 nTPM

Brain region

  • choroid plexus: 41 nTPM
  • midbrain: 28 nTPM
  • cerebellum: 26 nTPM
  • hypothalamus: 25 nTPM
  • white matter: 24 nTPM
  • medulla oblongata: 22 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)
0.93
gnomAD pLI
0
gnomAD missense Z
0.22
DepMap mean gene effect
0
DepMap dependency class
none

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 PDCD4 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 PDCD4 as an antibody target. Whether an autoantibody or antibody against PDCD4 could matter depends on whether native PDCD4 is physically reachable, whether the body needs it intact, and whether it acts in a disease-relevant tissue.

PDCD4 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 PDCD4 as an autoantigen. Seroatlas presents hypothesis context only and does not manufacture a known-serology claim.

Canonical record: https://seroatlas.com/gene/PDCD4. 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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