Trehalose accumulation induced during the oxidative stress response is independent of TPS1 mRNA levels in Candida albicans

International Microbiology : the Official Journal of the Spanish Society for Microbiology
Oscar ZaragozaJ C Argüelles

Abstract

Growing cells of the Candida albicans trehalose-deficient mutant tps1/tps1 were extremely sensitive to severe oxidative stress exposure (H2O2). However, their viability was not affected after saline stress or heat-shock treatments, being roughly equivalent to that of the parental strain. In wild-type cells, these adverse conditions induced the intracellular accumulation of trehalose together with activation of trehalose-6P synthase, whereas the endogenous trehalose content and the corresponding biosynthetic activity were barely detectable in the tps1/tps1 mutant. The addition of cycloheximide did not prevent the marked induction of trehalose-6P synthase activity. Furthermore, the presence of H2O2 decreased the level of TPS1 mRNA expression. Hence, the conspicuous trehalose accumulation in response to oxidative stress is not induced by increased transcription of TPS1. Our results are consistent with a specific requirement of trehalose in order to withstand a severe oxidative stress in C. albicans, and suggest that trehalose accumulation observed under these conditions is a complex process that most probably involves post-translational modifications of the trehalose synthase complex.

Citations

Apr 16, 2005·Current Opinion in Biotechnology·Gertien J Smits, Stanley Brul
Sep 7, 2012·The Journal of Biological Chemistry·Joke SerneelsPatrick Van Dijck
May 5, 2010·Infection and Immunity·Nadia Al-BaderDonald C Sheppard
May 20, 2014·Journal of Medical Microbiology·Nima MotamediLuiz E Bermudez
Mar 16, 2007·Clinical Microbiology and Infection : the Official Publication of the European Society of Clinical Microbiology and Infectious Diseases·M Martínez-EsparzaJ C Argüelles
Mar 4, 2008·Biological & Pharmaceutical Bulletin·Yingying CaoGuoQing Zhang
Apr 8, 2020·Frontiers in Microbiology·Xueqi ChenShujuan Sun

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