title: The oligomerization of OxyR in Escherichia coli.
abstract: We examine the contribution of residues at the dimer interface of the transcriptional regulator OxyR to oligomerization. Residues in contact across the dimer interface of OxyR were identified using the program Quaternary Contacts (QContacts). Site-directed mutagenesis was performed on the non-alanine or glycine residues identified in the resultant contact profile and the oligomerization ability of the mutant proteins was tested using the lambdacI repressor system to identify residues that are hot spots in OxyR. We compared the properties of these hot spots to those described in the literature from other systems. The hot spots identified in this study are not especially conserved amongst a set of OxyR orthologs.
authors.affiliation: Department of Biochemistry and Biophysics, Texas A&M University, 2128 TAMU, College Station, Texas 77843-2128, USA.
authors.forename: Gwendowlyn S
authors.initials: GS
authors.lastname: Knapp
authors.forename: Jerry W
authors.initials: JW
authors.lastname: Tsai
authors.forename: James C
authors.initials: JC
authors.lastname: Hu
mesh_terms: D000409:Alanine / Q000235:genetics / Q000378:metabolism; D000595:Amino Acid Sequence; D017124:Conserved Sequence; D004926:Escherichia coli / Q000235:genetics / Q000378:metabolism; D029968:Escherichia coli Proteins / Q000737:chemistry* / Q000235:genetics / Q000378:metabolism*; D008958:Models, Molecular; D016297:Mutagenesis, Site-Directed; D011485:Protein Binding / Q000235:genetics / Q000502:physiology*; D055503:Protein Multimerization / Q000235:genetics / Q000502:physiology*; D020836:Protein Structure, Quaternary / Q000235:genetics / Q000502:physiology; D012097:Repressor Proteins / Q000737:chemistry* / Q000235:genetics / Q000378:metabolism*; D012984:Software
chemical_list: D029968:Escherichia coli Proteins; D012097:Repressor Proteins; C499299:oxyR protein, E coli; D000409:Alanine