Crystallization and preliminary X-ray analysis of a D-alanyl-D-alanine ligase (EcDdlB) from Escherichia coli.

Acta Crystallogr Sect F Struct Biol Cryst Commun

Department of Biological Sciences, University of Warwick, Coventry CV4 7AL, England.

Published: April 2010

A recombinant form of Escherichia coli DdlB (EcDdlB) has been prepared and cocrystallized with ADP and D-alanyl-D-alanine to represent the ternary complex of EcDdlB. Furthermore, EcDdlB has been cocrystallized under the same conditions with the ligands ATP and D-alanyl-D-alanine, representing the product-inhibited complex. The crystals belonged to space group P2(1)2(1)2(1), with unit-cell parameters a = 53.0, b = 97.6, c = 109.5 A and a = 51.2, b = 97.8, c = 110.1 A, respectively, and both contained two molecules in the asymmetric unit. Complete data sets were collected to 1.5 and 1.4 A resolution, respectively, from single crystals under cryogenic conditions using synchrotron radiation.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2852331PMC
http://dx.doi.org/10.1107/S1744309110003970DOI Listing

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