Literature DB >> 16239475

The beta-glucuronidase klotho hydrolyzes and activates the TRPV5 channel.

Q Chang1, S Hoefs, A W van der Kemp, C N Topala, R J Bindels, J G Hoenderop.   

Abstract

Blood calcium concentration is maintained within a narrow range despite large variations in dietary input and body demand. The Transient Receptor Potential ion channel TRPV5 has been implicated in this process. We report here that TRPV5 is stimulated by the mammalian hormone klotho. Klotho, a beta-glucuronidase, hydrolyzes extracellular sugar residues on TRPV5, entrapping the channel in the plasma membrane. This maintains durable calcium channel activity and membrane calcium permeability in kidney. Thus, klotho activates a cell surface channel by hydrolysis of its extracellular N-linked oligosaccharides.

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Year:  2005        PMID： 16239475     DOI： 10.1126/science.1114245

Source DB:  PubMed          Journal:  Science        ISSN： 0036-8075            Impact factor:   47.728


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