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Structural highlights

Function

PK2L1_HUMAN Pore-forming subunit of a ciliary calcium channel that controls calcium concentration within primary cilia without affecting cytoplasmic calcium concentration. Forms a heterodimer with PKD1L1 in primary cilia and forms a calcium-permeant ciliary channel that regulates sonic hedgehog/SHH signaling and GLI2 transcription. May act as a sour taste receptor by forming a calcium channel with PKD1L3 in gustatory cells; however, its contribution to sour taste perception is unclear in vivo and may be indirect.^{[1] [2] [3] [4]}

References

1. ↑ Chen XZ, Vassilev PM, Basora N, Peng JB, Nomura H, Segal Y, Brown EM, Reeders ST, Hediger MA, Zhou J. Polycystin-L is a calcium-regulated cation channel permeable to calcium ions. Nature. 1999 Sep 23;401(6751):383-6. PMID:10517637 doi:http://dx.doi.org/10.1038/43907
2. ↑ Huque T, Cowart BJ, Dankulich-Nagrudny L, Pribitkin EA, Bayley DL, Spielman AI, Feldman RS, Mackler SA, Brand JG. Sour ageusia in two individuals implicates ion channels of the ASIC and PKD families in human sour taste perception at the anterior tongue. PLoS One. 2009 Oct 8;4(10):e7347. doi: 10.1371/journal.pone.0007347. PMID:19812697 doi:http://dx.doi.org/10.1371/journal.pone.0007347
3. ↑ Yu Y, Ulbrich MH, Li MH, Dobbins S, Zhang WK, Tong L, Isacoff EY, Yang J. Molecular mechanism of the assembly of an acid-sensing receptor ion channel complex. Nat Commun. 2012 Dec 4;3:1252. doi: 10.1038/ncomms2257. PMID:23212381 doi:http://dx.doi.org/10.1038/ncomms2257
4. ↑ DeCaen PG, Delling M, Vien TN, Clapham DE. Direct recording and molecular identification of the calcium channel of primary cilia. Nature. 2013 Dec 12;504(7479):315-8. doi: 10.1038/nature12832. PMID:24336289 doi:http://dx.doi.org/10.1038/nature12832