Rox1 mediated repression. Oxygen dependent repression in yeast.
For a large number of oxygen-regulated genes in the facultative aerobe, Saccharomyces cerevisiae, the presence of oxygen is sensed through the ability to use oxygen for heme biosynthesis. Heme induces the transcription of oxygen-induced genes and represses the transcription of hypoxic genes. Repression is mediated by the Rox1 protein in conjunction with the Ssn6/Tup1 general repression complex. The differential repression of hypoxic genes results from a combination of the tightness of Rox1 binding to the regulatory region of specific hypoxic genes and the presence or absence of binding sites for Mot3 which enhances Rox1 repression.
Kastaniotis
A J
AJ
Dept. Biol. Sci., University at Albany, SUNY, USA.
Zitomer
R S
RS
D000332:Aerobiosis / Q000235:genetics; D000693:Anaerobiosis / Q000235:genetics; D001483:Base Sequence; D001665:Binding Sites / Q000235:genetics; D004271:DNA, Fungal / Q000235:genetics / Q000378:metabolism; D004268:DNA-Binding Proteins / Q000235:genetics / Q000378:metabolism*; D005656:Fungal Proteins / Q000235:genetics / Q000378:metabolism*; D015966:Gene Expression Regulation, Fungal; D005800:Genes, Fungal; D009687:Nuclear Proteins; D010100:Oxygen / Q000378:metabolism*; D012097:Repressor Proteins / Q000235:genetics / Q000378:metabolism*; D012441:Saccharomyces cerevisiae / Q000235:genetics / Q000378:metabolism*; D029701:Saccharomyces cerevisiae Proteins
C065455:CYC8 protein, S cerevisiae; D004271:DNA, Fungal; D004268:DNA-Binding Proteins; D005656:Fungal Proteins; D009687:Nuclear Proteins; C083348:ROX1 protein, S cerevisiae; D012097:Repressor Proteins; D029701:Saccharomyces cerevisiae Proteins; C066502:TUP1 protein, S cerevisiae; D010100:Oxygen