Polycystin 2

Polycystin-2 (PC2)^[5] is a protein that in humans is encoded by the PKD2 gene.^[6][7][8]

PKD2
Available structures PDB Ortholog search: PDBe RCSB List of PDB id codes 2KLD, 2KLE, 2KQ6, 2Y4Q, 3HRN, 3HRO
Identifiers
Aliases	PKD2, APC2, PKD4, Pc-2, TRPP2, Polycystic kidney disease 2, polycystin 2, transient receptor potential cation channel
External IDs	OMIM: 173910; MGI: 1099818; HomoloGene: 20104; GeneCards: PKD2; OMA:PKD2 - orthologs
Gene location (Human) Chr. Chromosome 4 (human)[1] Band 4q22.1 Start 88,007,635 bp[1] End 88,077,777 bp[1]
Gene location (Mouse) Chr. Chromosome 5 (mouse)[2] Band 5 E5|5 50.68 cM Start 104,607,316 bp[2] End 104,653,685 bp[2]
RNA expression pattern Bgee Human Mouse (ortholog) Top expressed in Achilles tendon saphenous vein renal medulla ascending aorta synovial joint Descending thoracic aorta germinal epithelium myometrium right coronary artery stromal cell of endometrium Top expressed in ciliary body iris internal carotid artery Paneth cell vestibular membrane of cochlear duct external carotid artery calvaria semi-lunar valve condyle Epithelium of choroid plexus More reference expression data BioGPS n/a
Gene ontology Molecular function transmembrane transporter binding cytoskeletal protein binding signaling receptor binding muscle alpha-actinin binding metal ion binding HLH domain binding voltage-gated cation channel activity protein homodimerization activity calcium-induced calcium release activity channel activity protein binding actinin binding voltage-gated calcium channel activity calcium channel activity phosphoprotein binding alpha-actinin binding identical protein binding ATPase binding calcium ion binding outward rectifier potassium channel activity voltage-gated sodium channel activity voltage-gated potassium channel activity potassium channel activity voltage-gated ion channel activity Cellular component filamentous actin membrane integral component of cytoplasmic side of endoplasmic reticulum membrane cell projection extracellular exosome lamellipodium integral component of membrane basal plasma membrane integral component of lumenal side of endoplasmic reticulum membrane ciliary membrane polycystin complex cilium plasma membrane cell-cell junction ciliary basal body endoplasmic reticulum basal cortex mitotic spindle cytoplasm motile cilium non-motile cilium integral component of plasma membrane endoplasmic reticulum membrane basolateral plasma membrane cytoplasmic vesicle membrane cytoplasmic vesicle Biological process regulation of calcium ion import cellular response to osmotic stress negative regulation of G1/S transition of mitotic cell cycle heart looping metanephric S-shaped body morphogenesis negative regulation of cell population proliferation mesonephric tubule development renal system development metanephric cortex development kidney development cytoplasmic sequestering of transcription factor ion transport metanephric ascending thin limb development branching involved in ureteric bud morphogenesis neural tube development spinal cord development metanephric distal tubule development centrosome duplication cellular calcium ion homeostasis determination of liver left/right asymmetry cellular response to fluid shear stress aorta development cellular response to hydrostatic pressure metanephric mesenchyme development renal artery morphogenesis metanephric cortical collecting duct development mesonephric duct development positive regulation of cytosolic calcium ion concentration positive regulation of nitric oxide biosynthetic process cellular response to reactive oxygen species positive regulation of gene expression metanephric part of ureteric bud development regulation of cell population proliferation metanephric smooth muscle tissue development positive regulation of inositol 1,4,5-trisphosphate-sensitive calcium-release channel activity positive regulation of transcription by RNA polymerase II heart development receptor signaling pathway via JAK-STAT detection of mechanical stimulus embryonic placenta development detection of nodal flow liver development placenta blood vessel development renal tubule morphogenesis determination of left/right symmetry regulation of postsynaptic membrane potential negative regulation of ryanodine-sensitive calcium-release channel activity calcium ion transport release of sequestered calcium ion into cytosol calcium ion transmembrane transport cellular response to calcium ion sodium ion transmembrane transport protein homotetramerization cellular response to cAMP potassium ion transmembrane transport potassium ion transport regulation of ion transmembrane transport transport Sources:Amigo / QuickGO
Orthologs Species Human Mouse Entrez 5311 18764 Ensembl ENSG00000118762 ENSMUSG00000034462 UniProt Q13563 O35245 RefSeq (mRNA) NM_000297 NM_008861 RefSeq (protein) NP_000288 NP_032887 Location (UCSC) Chr 4: 88.01 – 88.08 Mb Chr 5: 104.61 – 104.65 Mb PubMed search [3] [4]
Wikidata
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The gene PKD2 also known as TRPP2, encodes a member of the polycystin protein family, called TRPP, and contains multiple transmembrane domains, and cytoplasmic N- and C-termini. The protein may be an integral membrane protein involved in cell-cell/matrix interactions. TRPP2 may function in renal tubular development, morphology, and function, and may modulate intracellular calcium homeostasis and other signal transduction pathways. This protein interacts with polycystin 1 (TRPP1) to produce cation-permeable currents. It was discovered by Stefan Somlo at Yale University.

Illustration of PKD1 and PKD2 proteins at the cell membrane

Clinical significance

Mutations in this gene have been associated with autosomal dominant polycystic kidney disease.^[8]

Interactions

Polycystin 2 has been shown to interact with the proteins TRPC1,^[9] PKD1^[9][10] and TNNI3.^[11]

See also

• HAX1
• TRPP