Loukin S~Saimi Y, 2008

Pubmed ID 18323404
Title A genome-wide survey suggests an osmoprotective role for vacuolar Ca2+ release in cell wall-compromised yeast.
Authors Stephen Loukin, Xinliang Zhou, Ching Kung, Yoshiro Saimi
Abstract In yeast, osmotic upshock causes a release of vacuolar Ca(2+) through the mechanosensitive transient receptor potential channel, Yvc1. We screened the collection of 4810 yeast gene deletants twice for alterations in this response in an attempt to find elements that regulate the amount of vacuolar Ca(2+) or the Yvc1 channel. Severe overresponders and underresponders to upshock were further scrutinized for their calcium content with (45)Ca and their Yvc1 electrophysiological activities under patch-clamp. The severe underresponders have lower calcium content but no change in Yvc1 activity. The strong overresponders, most of which are deleted of genes involved in cell wall metabolism, have higher calcium content. Wall mutations are known to up-regulate Ca(2+)-calcineurin-dependent genes. It appears that stress on the cell wall induces Ca(2+) accumulation, adaptively anticipating the need in defense or repair against future stress, including osmotic stress.
Citation FASEB J. 2008; 22:2405-15

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Paper Phenotype Condition Reference Collection Tested mutants Data Details
Loukin S~Saimi Y, 2008 abundance of calcium sodium chloride [4 M], 2-(N-morpholino)ethanesulfonic acid [20 mM], EGTA [20 mM] hap alpha 4,758 Quantitative
Loukin S~Saimi Y, 2008 growth (culture turbidity) sodium chloride [4 M], 2-(N-morpholino)ethanesulfonic acid [20 mM], EGTA [20 mM] hap alpha 4,758 Discrete

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