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Yeast putative transcription factors involved in salt tolerance
Author(s) -
Mendizabal Iratxe,
Rios Gabino,
Mulet Jose M,
Serrano Ramón,
de Larrinoa Iñigo F
Publication year - 1998
Publication title -
febs letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.593
H-Index - 257
eISSN - 1873-3468
pISSN - 0014-5793
DOI - 10.1016/s0014-5793(98)00249-x
Subject(s) - yeast , transcription factor , calcineurin , gene , biology , gene expression , promoter , chemistry , genetics , medicine , surgery , transplantation
Four putative yeast transcription factors (Hal6–9p) have been identified which upon overexpression in multicopy plasmids increase sodium and lithium tolerance. This effect is mediated, at least in part, by increased expression of the Ena1p Na + /Li + extrusion pump. Hal6p and Hal7p are bZIP proteins and their gene disruptions affected neither salt tolerance nor ENA1 expression. Hal8p and Hal9p are putative zinc fingers and their gene disruptions decreased both salt tolerance and ENA1 expression. Therefore, Hal8p and Hal9p, but not Hal6p and Hal7p, qualify as transcriptional activators of ENA1 under physiological conditions. Hal8p seems to mediate the calcineurin‐dependent part of ENA1 expression.