Essential roles of Snf5p in Snf-Swi chromatin remodeling in vivo.
Snf-Swi, the prototypical ATP-dependent nucleosome-remodeling complex, regulates transcription of a subset of yeast genes. With the exception of Snf2p, the ATPase subunit, the functions of the other components are unknown. We have investigated the role of the conserved Snf-Swi core subunit Snf5p through characterization of two conditional snf5 mutants. The mutants contain single amino acid alterations of invariant or conserved residues that abolish Snf-Swi-dependent transcription by distinct mechanisms. One mutation impairs Snf-Swi assembly and, consequently, its stable association with a target promoter. The other blocks a postrecruitment catalytic remodeling step. These findings suggest that Snf5p coordinates the assembly and nucleosome-remodeling activities of Snf-Swi.
Geng
F
F
Department of Microbiology and Immunology and Morse Institute of Molecular Biology and Genetics, State University of New York, Brooklyn, New York 11203, USA.
Cao
Y
Y
Laurent
B C
BC
D000255:Adenosine Triphosphate / Q000378:metabolism; D000483:Alleles; D020816:Amino Acid Motifs; D002843:Chromatin / Q000235:genetics / Q000378:metabolism*; D002868:Chromosomal Proteins, Non-Histone; D004247:DNA / Q000378:metabolism*; D004268:DNA-Binding Proteins / Q000737:chemistry / Q000235:genetics / Q000378:metabolism*; D017930:Genes, Reporter / Q000235:genetics; D005947:Glucose / Q000494:pharmacology; D006026:Glycoside Hydrolases / Q000235:genetics / Q000378:metabolism; D006801:Humans; D015151:Immunoblotting; D046911:Macromolecular Substances; D009707:Nucleosomes / Q000235:genetics / Q000378:metabolism; D011401:Promoter Regions, Genetic; D011485:Protein Binding / Q000187:drug effects; D017434:Protein Structure, Tertiary; D011993:Recombinant Fusion Proteins / Q000235:genetics / Q000378:metabolism; D012045:Regulatory Sequences, Nucleic Acid / Q000235:genetics; D000071796:SMARCB1 Protein; D012441:Saccharomyces cerevisiae / Q000235:genetics*; D029701:Saccharomyces cerevisiae Proteins; D013696:Temperature; D014157:Transcription Factors / Q000737:chemistry / Q000235:genetics / Q000378:metabolism*; D014158:Transcription, Genetic / Q000235:genetics; D043324:beta-Fructofuranosidase
D002843:Chromatin; D002868:Chromosomal Proteins, Non-Histone; D004268:DNA-Binding Proteins; D046911:Macromolecular Substances; D009707:Nucleosomes; D011993:Recombinant Fusion Proteins; D000071796:SMARCB1 Protein; C513266:SMARCB1 protein, human; C066190:SNF5 protein, S cerevisiae; D029701:Saccharomyces cerevisiae Proteins; D014157:Transcription Factors; D000255:Adenosine Triphosphate; D004247:DNA; D006026:Glycoside Hydrolases; D043324:beta-Fructofuranosidase; D005947:Glucose