Abstract:
:The conserved protein kinase Sch9 is a central player in the nutrient-induced signaling network in yeast, although only few of its direct substrates are known. We now provide evidence that Sch9 controls the vacuolar proton pump (V-ATPase) to maintain cellular pH homeostasis and ageing. A synthetic sick phenotype arises when deletion of SCH9 is combined with a dysfunctional V-ATPase, and the lack of Sch9 has a significant impact on cytosolic pH (pHc) homeostasis. Sch9 physically interacts with, and influences glucose-dependent assembly/disassembly of the V-ATPase, thereby integrating input from TORC1. Moreover, we show that the role of Sch9 in regulating ageing is tightly connected with V-ATPase activity and vacuolar acidity. As both Sch9 and the V-ATPase are highly conserved in higher eukaryotes, it will be interesting to further clarify their cooperative action on the cellular processes that influence growth and ageing.
journal_name
PLoS Genetjournal_title
PLoS geneticsauthors
Wilms T,Swinnen E,Eskes E,Dolz-Edo L,Uwineza A,Van Essche R,Rosseels J,Zabrocki P,Cameroni E,Franssens V,De Virgilio C,Smits GJ,Winderickx Jdoi
10.1371/journal.pgen.1006835subject
Has Abstractpub_date
2017-06-12 00:00:00pages
e1006835issue
6eissn
1553-7390issn
1553-7404pii
PGENETICS-D-16-02625journal_volume
13pub_type
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