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 SGGRQSVVLocalizationUniProt · 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 response to nutrient levels
- cytoskeleton organization
- negative regulation of apoptotic process
- phosphatidylinositol 3-kinase/protein kinase B signal transduction
- positive regulation of cell growth
- positive regulation of phosphatidylinositol 3-kinase/protein kinase B signal transduction
- TORC2 signaling
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.
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