The mitogen-activated protein kinase Slt2 modulates arsenite transport through the aquaglyceroporin Fps1
Artikel i vetenskaplig tidskrift, 2016

Arsenite is widely present in nature; therefore, cells have evolved mechanisms to prevent arsenite influx and promote efflux. In yeast (Saccharomyces cerevisiae), the aquaglyceroporin Fps1 mediates arsenite influx and efflux. The mitogen-activated protein kinase (MAPK) Hog1 has previously been shown to restrict arsenite influx through Fps1. In this study, we show that another MAPK, Slt2, is transiently phosphorylated in response to arsenite influx. Our findings indicate that the protein kinase activity of Slt2 is required for its role in arsenite tolerance. While Hog1 prevents arsenite influx via phosphorylation of T231 at the N-terminal domain of Fps1, Slt2 promotes arsenite efflux through phosphorylation of S537 at the C terminus. Our data suggest that Slt2 physically interacts with Fps1 and that this interaction depends on phosphorylation of S537. We hypothesize that Hog1 and Slt2 may affect each other's binding to Fps1, thereby controlling the opening and closing of the channel.


Doryaneh Ahmadpour

Göteborgs universitet

Ewa Maciaszczyk-Dziubinska

Uniwersytet Wrocławski

Roja Babazadeh

Göteborgs universitet

Sita Dahal

Göteborgs universitet

Magdalena Migocka

Uniwersytet Wrocławski

Mikael Andersson

Göteborgs universitet

Robert Wysocki

Uniwersytet Wrocławski

Markus J. Tamás

Göteborgs universitet

Stefan Hohmann

Chalmers, Biologi och bioteknik

Göteborgs universitet

FEBS Letters

00145793 (ISSN) 18733468 (eISSN)

Vol. 590 20 3649-3659



Biokemi och molekylärbiologi





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