Purification, crystallization and preliminary X-ray diffraction analysis of GatD, a glutamine amidotransferase-like protein fromStaphylococcus aureuspeptidoglycan
2014 ◽
Vol 70
(5)
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pp. 632-635
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Amidation of peptidoglycan is an essential feature inStaphylococcus aureusthat is necessary for resistance to β-lactams and lysozyme. GatD, a 27 kDa type I glutamine amidotransferase-like protein, together with MurT ligase, catalyses the amidation reaction of the glutamic acid residues of the peptidoglycan ofS. aureus. The native and the selenomethionine-derivative proteins were crystallized using the sitting-drop vapour-diffusion method with polyethylene glycol, sodium acetate and calcium acetate. The crystals obtained diffracted beyond 1.85 and 2.25 Å, respectively, and belonged to space groupP212121. X-ray diffraction data sets were collected at Diamond Light Source (on beamlines I02 and I04) and were used to obtain initial phases.
1999 ◽
Vol 55
(2)
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pp. 399-402
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2014 ◽
Vol 1056
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pp. 12-15
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