Journal
JOURNAL OF BACTERIOLOGY
Volume 188, Issue 14, Pages 5293-5298Publisher
AMER SOC MICROBIOLOGY
DOI: 10.1128/JB.00285-06
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Detailed structural analysis of Lactococcus lactis peptidoglycan was achieved by identification of its constituent muropeptides separated by reverse phase high-performance liquid chromatography. Modification of the classical elution buffer allowed direct and sensitive analysis of the purified muropeptides by matrix-assisted laser desorption ionization-time of flight mass spectrometry. The structures of 45 muropeptides were assigned for L. lactis strain MG1363. Analysis of the muropeptide composition of an MG1363 dacB mutant showed that the dacB-encoded protein has L,D-carboxypeptidase activity and is involved in peptidoglycan maturation.
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