Acinetobacter baumannii causes bacteraemia, pneumonia, other respiratory-tract and urinary-tract infections in humans. OXA-23 carbapenemase-producing A. baumannii K0420859 (A. baumannii OXA-23) is resistant to carbapenem, a common antibacterial drug. To develop an efficient and novel antibacterial drug against A. baumannii OXA-23, d-alanine-d-alanine ligase, which is essential in bacterial cell-wall synthesis, is of interest. Here, the d-alanine-d-alanine ligase (AbDdl) gene from A. baumannii OXA-23 was cloned and expressed, and the AbDdl protein was purified and crystallized; this enzyme can be used as a novel target for an antibacterial drug against A. baumannii OXA-23. The AbDdl crystal diffracted to a resolution of 2.8 Å and belonged to the orthorhombic space group P212121, with unit-cell parameters a = 113.4, b = 116.7, c = 176.5 Å, a corresponding V M of 2.8 Å3 Da -1 and a solvent content of 56.3%, and six protomers in the asymmetric unit.
|Number of pages||4|
|Journal||Acta Crystallographica Section F:Structural Biology Communications|
|State||Published - Apr 2014|
- OXA-23-producing Acinetobacter baumannii
- cell-wall synthesis
- d-alanine-d-alanine ligase