This domain is found in RecBCD enzyme subunit RecD from Escherichia coli and in similar proteins mostly found in Gammaproteobacteria. RecD is a 5'-3' helicase that comprises three domains. This entry represents the N-terminal domain of RecD, which forms the principal interface between RecD and domain 2B of RecC and leads to the conformational change in RecD that has significant effects on the conformation of the RecC subunit [1-4].

1: Crystal structure of RecBCD enzyme reveals a machine for processing DNA breaks. Singleton MR, Dillingham MS, Gaudier M, Kowalczykowski SC, Wigley DB; Nature. 2004;432:187-193. PMID:15538360

2: DNA binding to RecD: role of the 1B domain in SF1B helicase activity. Saikrishnan K, Griffiths SP, Cook N, Court R, Wigley DB; EMBO J. 2008;27:2222-2229. PMID:18668125

3: Mechanism for nuclease regulation in RecBCD. Wilkinson M, Chaban Y, Wigley DB; Elife. 2016; [Epub ahead of print] PMID:27644322

4: Structural basis for the inhibition of RecBCD by Gam and its synergistic antibacterial effect with quinolones. Wilkinson M, Troman L, Wan Nur Ismah WA, Chaban Y, Avison MB, Dillingham MS, Wigley DB; Elife. 2016; [Epub ahead of print] PMID:28009252