This entry includes haem degrading protein HbpS from Streptomyces reticuli (swiss:Q9RIM2) and and GlcG from Escherichia coli [1]. HbpS is up-regulated in response to haemin- and peroxide-based oxidative stress. It interacts with the SenS/SenR two-component signal transduction system. Iron binds to surface-exposed lysine residues of an octomeric assembly of the protein [2]. The structure of GlcG is composed of an alpha-beta(2)-alpha(3)-beta(2)-alpha fold, similar to the Roadblock/LC7 domain.

1: glc locus of Escherichia coli: characterization of genes encoding the subunits of glycolate oxidase and the glc regulator protein. Pellicer MT, Badia J, Aguilar J, Baldoma L; J Bacteriol 1996;178:2051-2059. PMID:8606183

2: The oligomeric assembly of the novel haem-degrading protein HbpS is essential for interaction with its cognate two-component sensor kinase. Ortiz de Orue Lucana D, Bogel G, Zou P, Groves MR; J Mol Biol. 2009;386:1108-1122. PMID:19244623