Reference: Laurent BC, et al. (1991) Functional interdependence of the yeast SNF2, SNF5, and SNF6 proteins in transcriptional activation. Proc Natl Acad Sci U S A 88(7):2687-91

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Abstract


The SNF2, SNF5, and SNF6 genes of Saccharomyces cerevisiae are required for expression of a variety of differently regulated genes. Previous evidence implicated the SNF5 protein in transcriptional activation, and a DNA-bound LexA-SNF5 fusion protein was shown to activate expression of a nearby promoter. Here, we examine the functional relationship of the SNF2, SNF5, and SNF6 proteins. Activation by DNA-bound LexA-SNF5 fusion protein was greatly reduced in snf2 and snf6 mutants, indicating that activation by LexA-SNF5 requires SNF2 and SNF6 function. An spt6 mutation, which suppresses transcriptional defects caused by snf2, restored activation by LexA-SNF5 in a snf2 mutant. The SNF2 gene was sequenced and encodes a 194-kDa protein that is targeted to the nucleus. DNA-bound LexA-SNF2 fusion protein also activated transcription, dependent on SNF5 and SNF6. These findings suggest that SNF2, SNF5, and SNF6 function interdependently in transcriptional activation, possibly forming a heteromeric complex.

Reference Type
Journal Article | Research Support, Non-U.S. Gov't | Research Support, U.S. Gov't, P.H.S.
Authors
Laurent BC, Treitel MA, Carlson M
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