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Protein Sci. 2009 Jan;18(1):101-7. doi: 10.1002/pro.5.

The oligomerization of OxyR in Escherichia coli.

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1
Department of Biochemistry and Biophysics, Texas A&M University, 2128 TAMU, College Station, Texas 77843-2128, USA.

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.

PMID:
19177355
PMCID:
PMC2708027
DOI:
10.1002/pro.5
[Indexed for MEDLINE]
Free PMC Article
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