Purification, crystallization and preliminary X-ray crystallographic analysis of diaminopimelate epimerase from Acinetobacter baumannii.

ABSTRACT: The meso isomer of diaminopimelate (meso-DAP) is a biosynthetic precursor of L-lysine in bacteria and plants, and is a key component of the peptidoglycan layer in the cell walls of Gram-negative and some Gram-positive bacteria. Diaminopimelate epimerase (DapF) is a pyridoxal-5'-phosphate-independent racemase which catalyses the interconversion of (6S,2S)-2,6-diaminopimelic acid (LL-DAP) and meso-DAP. In this study, DapF from Acinetobacter baumannii was overexpressed in Escherichia coli strain SoluBL21, purified and crystallized using a vapour-diffusion method. A native crystal diffracted to a resolution of 1.9?Å and belonged to space group P3(1) or P3(2), with unit-cell parameters a = b = 74.91, c = 113.35?Å, ? = ? = 90, ? = 120°. There were two molecules in the asymmetric unit.

SUBMITTER: Park JS 

PROVIDER: S-EPMC3539701 | biostudies-literature | 2013 Jan

REPOSITORIES: biostudies-literature