Abstract:
:Mutations in WNK kinases cause the human hypertensive disease pseudohypoaldosteronism type II (PHAII), but the regulatory mechanisms of the WNK kinases are not well understood. Mutations in kelch-like 3 (KLHL3) and Cullin3 were also recently identified as causing PHAII. Therefore, new insights into the mechanisms of human hypertension can be gained by determining how these components interact and how they are involved in the pathogenesis of PHAII. Here, we found that KLHL3 interacted with Cullin3 and WNK4, induced WNK4 ubiquitination, and reduced the WNK4 protein level. The reduced interaction of KLHL3 and WNK4 by PHAII-causing mutations in either protein reduced the ubiquitination of WNK4, resulting in an increased level of WNK4 protein. Transgenic mice overexpressing WNK4 showed PHAII phenotypes, and WNK4 protein was indeed increased in Wnk4(D561A/+) PHAII model mice. Thus, WNK4 is a target for KLHL3-mediated ubiquitination, and the impaired ubiquitination of WNK4 is a common mechanism of human hereditary hypertension.
journal_name
Cell Repjournal_title
Cell reportsauthors
Wakabayashi M,Mori T,Isobe K,Sohara E,Susa K,Araki Y,Chiga M,Kikuchi E,Nomura N,Mori Y,Matsuo H,Murata T,Nomura S,Asano T,Kawaguchi H,Nonoyama S,Rai T,Sasaki S,Uchida Sdoi
10.1016/j.celrep.2013.02.024subject
Has Abstractpub_date
2013-03-28 00:00:00pages
858-68issue
3issn
2211-1247pii
S2211-1247(13)00100-9journal_volume
3pub_type
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