Genome-wide Analysis of Gene Expression Regulated by the Calcineurin/Crz1p Signaling Pathway in Saccharomyces cerevisiae
In Saccharomyces cerevisiae , the Ca 2+ /calmodulin-dependent protein phosphatase, calcineurin, is activated by specific environmental conditions, including exposure to Ca 2+ and Na + , and induces gene expression by regulating the Crz1p/Tcn1p transcription factor. We used DNA microarrays to perform...
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Veröffentlicht in: | The Journal of biological chemistry 2002-08, Vol.277 (34), p.31079-31088 |
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Sprache: | eng |
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Zusammenfassung: | In Saccharomyces cerevisiae , the Ca 2+ /calmodulin-dependent protein phosphatase, calcineurin, is activated by specific environmental conditions, including exposure
to Ca 2+ and Na + , and induces gene expression by regulating the Crz1p/Tcn1p transcription factor. We used DNA microarrays to perform a comprehensive
analysis of calcineurin/Crz1p-dependent gene expression following addition of Ca 2+ (200 m m ) or Na + (0.8 m ) to yeast. 163 genes exhibited increased expression that was reduced 50% or more by calcineurin inhibition. These calcineurin-dependent
genes function in signaling pathways, ion/small molecule transport, cell wall maintenance, and vesicular transport, and include
many open reading frames of previously unknown function. Three distinct gene classes were defined as follows: 28 genes displayed
calcineurin-dependent induction in response to Ca 2+ and Na + , 125 showed calcineurin-dependent expression following Ca 2+ but not Na + addition, and 10 were regulated by calcineurin in response to Na + but not Ca 2+ . Analysis of crz1Î cells established Crz1p as the major effector of calcineurin-regulated gene expression in yeast. We identified the Crz1p-binding
site as 5â²-GNGGC(G/T)CA-3â² by in vitro site selection. A similar sequence, 5â²-GAGGCTG-3â², was identified as a common sequence motif in the upstream regions of calcineurin/
Crz1p-dependent genes. This finding is consistent with direct regulation of these genes by Crz1p. |
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ISSN: | 0021-9258 1083-351X |
DOI: | 10.1074/jbc.M202718200 |