title: A folding transition and novel zinc finger accessory domain in the transcription factor ADR1.
abstract: The region responsible for sequence-specific DNA binding by the transcription factor ADR1 contains two Cys2-His2 zinc fingers and an additional N-terminal proximal accessory region (PAR). The N-terminal (non-finger) PAR is unstructured in the absence of DNA and undergoes a folding transition on binding the DNA transcription target site. We have used a set of HN-HN NOEs derived from a perdeuterated protein-DNA complex to describe the fold of ADR1 bound to the UAS1 binding site. The PAR forms a compact domain consisting of three antiparallel strands that contact A-T base pairs in the major groove. The three-strand domain is a novel fold among all known DNA-binding proteins. The PAR shares sequence homology with the N-terminal regions of other zinc finger proteins, suggesting that it represents a new DNA-binding module that extends the binding repertoire of zinc finger proteins.
authors.affiliation: Department of Biochemistry, University of Washington, Seattle 98195-7742, USA.
authors.forename: P M
authors.initials: PM
authors.lastname: Bowers
authors.forename: L E
authors.initials: LE
authors.lastname: Schaufler
authors.forename: R E
authors.initials: RE
authors.lastname: Klevit
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D001665:Binding Sites; D017124:Conserved Sequence; D003460:Crystallization; D018360:Crystallography, X-Ray; D004247:DNA / Q000737:chemistry / Q000378:metabolism; D004268:DNA-Binding Proteins / Q000737:chemistry* / Q000235:genetics / Q000378:metabolism; D006801:Humans; D008958:Models, Molecular; D008969:Molecular Sequence Data; D016296:Mutagenesis; D019906:Nuclear Magnetic Resonance, Biomolecular; D010446:Peptide Fragments / Q000737:chemistry / Q000235:genetics / Q000378:metabolism; D011487:Protein Conformation; D017510:Protein Folding; D020218:Response Elements / Q000235:genetics; D012441:Saccharomyces cerevisiae / Q000737:chemistry / Q000235:genetics; D029701:Saccharomyces cerevisiae Proteins; D012996:Solutions; D014157:Transcription Factors / Q000737:chemistry* / Q000235:genetics / Q000378:metabolism; D016335:Zinc Fingers
chemical_list: C074682:ADR1 protein, S cerevisiae; D004268:DNA-Binding Proteins; D010446:Peptide Fragments; D029701:Saccharomyces cerevisiae Proteins; D012996:Solutions; D014157:Transcription Factors; D004247:DNA