Seroatlas · Human Serome Atlas

PROCR

Endothelial protein C receptor

Also known as: CCD41, CD201, EPCR, EPCR_HUMAN

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

Protein identityUniProt · HPA

UniProt accession
Q9UNN8
Gene
PROCR
Ensembl
ENSG00000101000
Chromosome
20
Canonical length
238 aa
Protein class
Candidate cardiovascular disease genes, CD markers, FDA approved drug targets, Plasma proteins, Predicted intracellular proteins, Predicted membrane proteins

OverviewNCBI Gene

The protein encoded by this gene is a receptor for activated protein C, a serine protease activated by and involved in the blood coagulation pathway. The encoded protein is an N-glycosylated type I membrane protein that enhances the activation of protein C. Mutations in this gene have been associated with venous thromboembolism and myocardial infarction, as well as with late fetal loss during pregnancy. The encoded protein may also play a role in malarial infection and has been associated with cancer. [provided by RefSeq, Jul 2013]

Canonical amino-acid sequenceUniProt

238 residues, UniProt reviewed canonical sequence.

>Q9UNN8|PROCR
     1  MLTTLLPILL LSGWAFCSQD ASDGLQRLHM LQISYFRDPY HVWYQGNASL GGHLTHVLEG
    61  PDTNTTIIQL QPLQEPESWA RTQSGLQSYL LQFHGLVRLV HQERTLAFPL TIRCFLGCEL
   121  PPEGSRAHVF FEVAVNGSSF VSFRPERALW QADTQVTSGV VTFTLQQLNA YNRTRYELRE
   181  FLEDTCVQYV QKHISAENTK GSQTSRSYTS LVLGVLVGSF IIAGVAVGIF LCTGGRRC

LocalizationUniProt · AlphaFold · HPA

Whether an antibody against PROCR 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
120 nTPM

Expression across tissuesHPA

Tissue

  • adipose tissue: 120 nTPM
  • breast: 55 nTPM
  • blood vessel: 44 nTPM
  • fallopian tube: 42 nTPM
  • heart muscle: 42 nTPM
  • choroid plexus: 38 nTPM

Single-cell type

  • mesothelial cells: 397 nCPM
  • fibro-adipogenic progenitors: 265 nCPM
  • lymphatic endothelial cells: 200 nCPM
  • extravillous trophoblasts: 183 nCPM
  • granulosa cells: 178 nCPM
  • fibroblasts: 139 nCPM

Immune cell

  • MAIT T-cell: 15 nTPM
  • gdT-cell: 8.1 nTPM
  • myeloid DC: 7.8 nTPM
  • naive CD8 T-cell: 5.8 nTPM
  • memory CD8 T-cell: 5.1 nTPM
  • basophil: 4.1 nTPM

Brain region

  • choroid plexus: 31 nTPM
  • cerebellum: 25 nTPM
  • thalamus: 23 nTPM
  • white matter: 23 nTPM
  • medulla oblongata: 22 nTPM
  • pons: 19 nTPM

DiseaseUniProt · ClinVar · IEDB · PubMed

Four sources answering four different questions about PROCR.

Disease | AutoantibodyPubMed

Conditions in which antibodies against PROCR are reported. Each links to that disease's full target list.

ReferencesPubMed · IEDB

Publications for PROCR from three distinct lines of evidence, kept separate because they answer different questions: whether antibodies are directed at the protein, whether a B-cell epitope has been mapped on it, and whether a T-cell epitope has. Each is labelled with its source.

Sources: PubMed — antigen-level antibody evidence from a custom retrieval. Records matching a controlled set of autoantibody terms (the MeSH descriptors Autoantibodies and Autoantigens, with title and abstract term variants) were obtained through NCBI E-utilities, and their titles and abstracts parsed for constructions that direct an antibody at a named protein rather than for co-occurrence. Captured names were resolved against UniProt nomenclature and each antigen adjudicated individually against the source text. Bibliographic records from PubMed and MeSH, U.S. National Library of Medicine; citation metrics from NIH iCite (Hutchins et al., PLoS Biology 2016). Titles link to PubMed; abstracts are not reproduced here. The NLM does not endorse this analysis.

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)
1.05
gnomAD pLI
0.01
gnomAD missense Z
0.54
DepMap mean gene effect
-0.03
DepMap dependency class
selective

Cancer expressionTCGA

Across TCGA tumor cohorts, this protein is over-expressed in roughly 6% 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 PROCR as an antibody target. Whether an autoantibody or antibody against PROCR could matter depends on whether native PROCR is physically reachable, whether the body needs it intact, and whether it acts in a disease-relevant tissue.

PROCR is annotated at the cell surface, where native PROCR 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 PROCR as an autoantigen. Seroatlas presents hypothesis context only and does not manufacture a known-serology claim.

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