title: Comparison of the structures of operator DNA free and in complex with lambda repressor.
abstract: The structures of operator DNA unbound and in complex with lambda repressor protein are compared. The conformation of the left 10 base pairs of a lambda right regulatory operator DNA sequence has been previously determined in solution using nuclear magnetic resonance techniques and the structure of a homologous left regulatory operator DNA bound to lambda repressor N-terminal domain had been previously solved using X-ray crystallography. The DNA adopts an overall linear B-form DNA both in the absence and presence of lambda repressor. Superimpositioning of the DNA structures reveals small differences between them that are due to the binding of protein and not to the different techniques used for their determination.
authors.affiliation: Department of Biochemistry, University of Alberta, Edmonton, Canada.
authors.forename: J D
authors.initials: JD
authors.lastname: Baleja
authors.forename: B D
authors.initials: BD
authors.lastname: Sykes
mesh_terms: D001483:Base Sequence; D016384:Consensus Sequence / Q000235:genetics; D004279:DNA, Viral / Q000737:chemistry* / Q000235:genetics / Q000378:metabolism; D004268:DNA-Binding Proteins; D046911:Macromolecular Substances; D009682:Magnetic Resonance Spectroscopy; D008969:Molecular Sequence Data; D009690:Nucleic Acid Conformation; D009875:Operator Regions, Genetic; D011487:Protein Conformation; D012097:Repressor Proteins / Q000737:chemistry / Q000378:metabolism*; D014764:Viral Proteins; D054334:Viral Regulatory and Accessory Proteins
chemical_list: D004279:DNA, Viral; D004268:DNA-Binding Proteins; D046911:Macromolecular Substances; D012097:Repressor Proteins; D014764:Viral Proteins; D054334:Viral Regulatory and Accessory Proteins; C016649:phage repressor proteins