scholarly journals Revisiting the NaCl cotransporter regulation by with-no-lysine kinases

2015 ◽  
Vol 308 (10) ◽  
pp. C779-C791 ◽  
Author(s):  
Silvana Bazúa-Valenti ◽  
Gerardo Gamba

The renal thiazide-sensitive Na+-Cl− cotransporter (NCC) is the salt transporter in the distal convoluted tubule. Its activity is fundamental for defining blood pressure levels. Decreased NCC activity is associated with salt-remediable arterial hypotension with hypokalemia (Gitelman disease), while increased activity results in salt-sensitive arterial hypertension with hyperkalemia (pseudohypoaldosteronism type II; PHAII). The discovery of four different genes causing PHAII revealed a complex multiprotein system that regulates the activity of NCC. Two genes encode for with-no-lysine (K) kinases WNK1 and WNK4, while two encode for kelch-like 3 (KLHL3) and cullin 3 (CUL3) proteins that form a RING type E3 ubiquitin ligase complex. Extensive research has shown that WNK1 and WNK4 are the targets for the KLHL3-CUL3 complex and that WNKs modulate the activity of NCC by means of intermediary Ste20-type kinases known as SPAK or OSR1. The understanding of the effect of WNKs on NCC is a complex issue, but recent evidence discussed in this review suggests that we could be reaching the end of the dark ages regarding this matter.

Biology Open ◽  
2015 ◽  
Vol 4 (11) ◽  
pp. 1509-1517 ◽  
Author(s):  
Y. Araki ◽  
T. Rai ◽  
E. Sohara ◽  
T. Mori ◽  
Y. Inoue ◽  
...  

FEBS Open Bio ◽  
2018 ◽  
Vol 8 (3) ◽  
pp. 461-469 ◽  
Author(s):  
Leping Shao ◽  
Li Cui ◽  
Jingru Lu ◽  
Yanhua Lang ◽  
Irene Bottillo ◽  
...  

2022 ◽  
Author(s):  
Antonio Cuevas-Navarro ◽  
Laura Rodriguez-Muñoz ◽  
Joaquim Grego-Bessa ◽  
Alice Cheng ◽  
Katherine A Rauen ◽  
...  

RAS GTPases are highly conserved proteins involved in the regulation of mitogenic signaling. We have previously described a novel Cullin 3 RING E3 ubiquitin ligase complex formed by the substrate adaptor protein LZTR1 that binds, ubiquitinates, and promotes proteasomal degradation of the RAS GTPase RIT1. In addition, others have described that this complex is also responsible for the ubiquitination of canonical RAS GTPases. Here, we have analyzed the phenotypes of LZTR1 loss-of-function mutants in both fruit flies and mice and have demonstrated biochemical dependency on their RIT1 orthologs. Moreover, we show that LZTR1 is haplosufficient in mice and that embryonic lethality of the homozygous null allele can be rescued by deletion of RIT1.


2013 ◽  
Vol 14 (1) ◽  
Author(s):  
Shoji Tsuji ◽  
Miyoko Yamashita ◽  
Gen Unishi ◽  
Reiko Takewa ◽  
Takahisa Kimata ◽  
...  

Nephrology ◽  
2020 ◽  
Vol 25 (11) ◽  
pp. 818-821
Author(s):  
Kiyoshi Nakano ◽  
Yasuo Kubota ◽  
Takayuki Mori ◽  
Motoko Chiga ◽  
Takayasu Mori ◽  
...  

2018 ◽  
Vol 22 (6) ◽  
pp. 1251-1257 ◽  
Author(s):  
Sayaka Yoshida ◽  
Yuya Araki ◽  
Takayasu Mori ◽  
Emi Sasaki ◽  
Yuri Kasagi ◽  
...  

2017 ◽  
Author(s):  
Kirthi C. Reddy ◽  
Tal Dror ◽  
Jessica N. Sowa ◽  
Johan Panek ◽  
Kevin Chen ◽  
...  

SummaryMaintenance of proteostasis is critical for organismal health. Here we describe a novel pathway that promotes proteostasis, identified through the analysis of C. elegans genes upregulated by intracellular infection. We named this distinct transcriptional signature the Intracellular Pathogen Response (IPR), and it includes upregulation of several predicted ubiquitin ligase complex components such as the cullin cul-6. Through a forward genetic screen we found pals-22, a gene of previously unknown function, to be a repressor of the cul-6/Cullin gene and other IPR gene expression. Interestingly, pals-22 mutants have increased thermotolerance and reduced levels of stress-induced polyglutamine aggregates, likely due to upregulated IPR expression. We found the enhanced stress resistance of pals-22 mutants to be dependent on cul-6, suggesting that pals-22 mutants have increased activity of a CUL-6/Cullin-containing ubiquitin ligase complex. pals-22 mutant phenotypes are distinct from the well-studied heat shock and insulin signaling pathways, indicating that the IPR is a novel pathway that protects animals from proteotoxic stress.


2000 ◽  
Vol 67 (2) ◽  
pp. 302-310 ◽  
Author(s):  
Sandra Disse-Nicodème ◽  
Jean-Michel Achard ◽  
Isabelle Desitter ◽  
Anne-Marie Houot ◽  
Albert Fournier ◽  
...  

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