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Characterization of a short unique sequence in the yeast HO gene promoter that regulates HO transcription in a SIN1 dependent manner

Recently it has become clear that general chromatin proteins as well as sequence-specific DNA binding proteins are important in the control of gene expression. SIN1 in Saccharomyces cerevislae is a chromatin component that regulates the transcription of a family of genes. Previously, we identified a...

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Published in:FEBS letters 1996-03, Vol.382 (1), p.97-100
Main Authors: Yona, Eyal, Bangio, Haim, Friedman, Yael, Shpungin, Sally, Katcoff, Don J.
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Bangio, Haim
Friedman, Yael
Shpungin, Sally
Katcoff, Don J.
description Recently it has become clear that general chromatin proteins as well as sequence-specific DNA binding proteins are important in the control of gene expression. SIN1 in Saccharomyces cerevislae is a chromatin component that regulates the transcription of a family of genes. Previously, we identified a 32 bp unique sequence (here termed XBS) in the promoter of one of those genes, HO, which specifically binds a protein that interacts with SIN1. We also found that this sequence can function as a weak UAS in a heterologous promoter that is dependent on the presence of SIN1. Here we report a relationship between the level of HO expression and the presence of the short sequence in situ in the HO gene. By comparing the expression of HO from wild type or XBS deleted HO promoters, we concluded that XBS serves as a weak UAS in situ in the HO gene, that it influences HO transcription via the SWI/SNF complex, and that sequences other than the XBS mediate the affect of SIN1 on HO transcription. In addition, we show that a portion of the SIN1 protein that has sequence similarity to mammalian HMG1 preferentially binds the XBS.
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source ScienceDirect Journals
subjects ABS
Base Sequence
beta-Galactosidase - biosynthesis
beta-Galactosidase - genetics
Chromosomal Proteins, Non-Histone - metabolism
Chromosomal Proteins, Non-Histone - physiology
Deoxyribonucleases, Type II Site-Specific - genetics
DNA, Fungal - metabolism
DNA-Binding Proteins - metabolism
DNA-Binding Proteins - physiology
Gene Expression Regulation, Fungal - genetics
Genes, Reporter - genetics
HMG1
HO transcription
Molecular Sequence Data
Promoter Regions, Genetic - genetics
Recombinant Fusion Proteins - metabolism
Saccharomyces cerevisiae
Saccharomyces cerevisiae - enzymology
Saccharomyces cerevisiae - genetics
Saccharomyces cerevisiae Proteins
SIN1
SWI/SNF complex
Transcription Factors - physiology
Transcription, Genetic - genetics
wild type
X-binding sequence
title Characterization of a short unique sequence in the yeast HO gene promoter that regulates HO transcription in a SIN1 dependent manner
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