Seroatlas · Human Serome Atlas

PRR5

Proline-rich protein 5

Also known as: FLJ20185k, PP610, Protor-1, PRR5_HUMAN

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

Protein identityUniProt · HPA

UniProt accession
P85299
Gene
PRR5
Ensembl
ENSG00000186654
Chromosome
22
Canonical length
388 aa
Protein class
Predicted intracellular proteins

OverviewNCBI Gene

This gene encodes a protein with a proline-rich domain. This gene is located in a region of chromosome 22 reported to contain a tumor suppressor gene that may be involved in breast and colorectal tumorigenesis. The protein is a component of the mammalian target of rapamycin complex 2 (mTORC2), and it regulates platelet-derived growth factor (PDGF) receptor beta expression and PDGF signaling to Akt and S6K1. Alternative splicing and the use of alternative promoters results in transcripts encoding different isoforms. Read-through transcripts from this gene into the downstream Rho GTPase activating protein 8 (ARHGAP8) gene also exist, which led to the original description of PRR5 and ARHGAP8 being a single gene. [provided by RefSeq, Nov 2010]

Canonical amino-acid sequenceUniProt

388 residues, UniProt reviewed canonical sequence.

>P85299|PRR5
     1  MRTLRRLKFM SSPSLSDLGK REPAAAADER GTQQRRACAN ATWNSIHNGV IAVFQRKGLP
    61  DQELFSLNEG VRQLLKTELG SFFTEYLQNQ LLTKGMVILR DKIRFYEGQK LLDSLAETWD
   121  FFFSDVLPML QAIFYPVQGK EPSVRQLALL HFRNAITLSV KLEDALARAH ARVPPAIVQM
   181  LLVLQGVHES RGVTEDYLRL ETLVQKVVSP YLGTYGLHSS EGPFTHSCIL EKRLLRRSRS
   241  GDVLAKNPVV RSKSYNTPLL NPVQEHEAEG AAAGGTSIRR HSVSEMTSCP EPQGFSDPPG
   301  QGPTGTFRSS PAPHSGPCPS RLYPTTQPPE QGLDPTRSSL PRSSPENLVD QILESVDSDS
   361  EGIFIDFGRG RGSGMSDLEG SGGRQSVV

LocalizationUniProt · AlphaFold · HPA

Whether an antibody against PRR5 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)
0.5
Highest tissue expression
19 nTPM

Expression across tissuesHPA

Tissue

  • spleen: 19 nTPM
  • liver: 18 nTPM
  • pituitary gland: 16 nTPM
  • adipose tissue: 15 nTPM
  • basal ganglia: 15 nTPM
  • cerebral cortex: 14 nTPM

Single-cell type

  • choroid plexus epithelial cells: 89 nCPM
  • adipocytes: 58 nCPM
  • astrocytes: 47 nCPM
  • pituicytes/fscs: 45 nCPM
  • somatotrophs: 44 nCPM
  • proximal tubule cells: 39 nCPM

Immune cell

  • MAIT T-cell: 29 nTPM
  • gdT-cell: 25 nTPM
  • non-classical monocyte: 19 nTPM
  • memory CD8 T-cell: 19 nTPM
  • T-reg: 15 nTPM
  • naive CD8 T-cell: 13 nTPM

Brain region

  • choroid plexus: 21 nTPM
  • hypothalamus: 18 nTPM
  • pons: 14 nTPM
  • midbrain: 13 nTPM
  • medulla oblongata: 13 nTPM
  • hippocampal formation: 12 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)
0.64
gnomAD pLI
0.07
gnomAD missense Z
-0.24
DepMap mean gene effect
0.04
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

Cellular components

Protein domainsUniProt · Pfam · InterPro

KeywordsUniProt

InteractionsUniProt · HPA

Protein binding partners of PRR5 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 PRR5 as an antibody target. Whether an autoantibody or antibody against PRR5 could matter depends on whether native PRR5 is physically reachable, whether the body needs it intact, and whether it acts in a disease-relevant tissue.

PRR5 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 PRR5 as an autoantigen. Seroatlas presents hypothesis context only and does not manufacture a known-serology claim.

Canonical record: https://seroatlas.com/gene/PRR5. 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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