6e2f

Structural highlights

Function

TRPV6_HUMAN Calcium selective cation channel that mediates Ca(2+) uptake in various tissues, including the intestine (PubMed:11097838, PubMed:11278579, PubMed:11248124 PubMed:15184369, PubMed:23612980). Important for normal Ca(2+) ion homeostasis in the body, including bone and skin (By similarity). The channel is activated by low internal calcium level, probably including intracellular calcium store depletion, and the current exhibits an inward rectification (PubMed:15184369). Inactivation includes both a rapid Ca(2+)-dependent and a slower Ca(2+)-calmodulin-dependent mechanism; the latter may be regulated by phosphorylation. In vitro, is slowly inhibited by Mg(2+) in a voltage-independent manner. Heteromeric assembly with TRPV5 seems to modify channel properties. TRPV5-TRPV6 heteromultimeric concatemers exhibit voltage-dependent gating.[UniProtKB:Q91WD2]^{[1] [2] [3] [4] [5]}

See Also

• Calmodulin 3D structures
• Ion channels 3D structures

References

1. ↑ Peng JB, Chen XZ, Berger UV, Weremowicz S, Morton CC, Vassilev PM, Brown EM, Hediger MA. Human calcium transport protein CaT1. Biochem Biophys Res Commun. 2000 Nov 19;278(2):326-32. doi:, 10.1006/bbrc.2000.3716. PMID:11097838 doi:http://dx.doi.org/10.1006/bbrc.2000.3716
2. ↑ Niemeyer BA, Bergs C, Wissenbach U, Flockerzi V, Trost C. Competitive regulation of CaT-like-mediated Ca2+ entry by protein kinase C and calmodulin. Proc Natl Acad Sci U S A. 2001 Mar 13;98(6):3600-5. doi: 10.1073/pnas.051511398. PMID:11248124 doi:http://dx.doi.org/10.1073/pnas.051511398
3. ↑ Wissenbach U, Niemeyer BA, Fixemer T, Schneidewind A, Trost C, Cavalie A, Reus K, Meese E, Bonkhoff H, Flockerzi V. Expression of CaT-like, a novel calcium-selective channel, correlates with the malignancy of prostate cancer. J Biol Chem. 2001 Jun 1;276(22):19461-8. doi: 10.1074/jbc.M009895200. Epub 2001, Feb 2. PMID:11278579 doi:http://dx.doi.org/10.1074/jbc.M009895200
4. ↑ Bodding M, Flockerzi V. Ca2+ dependence of the Ca2+-selective TRPV6 channel. J Biol Chem. 2004 Aug 27;279(35):36546-52. doi: 10.1074/jbc.M404679200. Epub 2004, Jun 7. PMID:15184369 doi:http://dx.doi.org/10.1074/jbc.M404679200
5. ↑ Fecher-Trost C, Wissenbach U, Beck A, Schalkowsky P, Stoerger C, Doerr J, Dembek A, Simon-Thomas M, Weber A, Wollenberg P, Ruppert T, Middendorff R, Maurer HH, Flockerzi V. The in vivo TRPV6 protein starts at a non-AUG triplet, decoded as methionine, upstream of canonical initiation at AUG. J Biol Chem. 2013 Jun 7;288(23):16629-44. doi: 10.1074/jbc.M113.469726. Epub 2013, Apr 23. PMID:23612980 doi:http://dx.doi.org/10.1074/jbc.M113.469726