[No authors listed]
Cell wall synthesis in bacteria is spatially organized by cytoskeletal structures. Common to all cell wall-bearing bacteria, the cytokinetic machinery localizes the cell wall synthesis to the site of septation. Recently, MinJ, a new component of the cytokinetic machinery, or divisome, of Bacillus subtilis has been described. MinJ is part of the division site selection system but also essential for correct assembly of the divisome. Here, I used the isolated PDZ domain of MinJ for co-elution experiments. One of the proteins that co-eluted was the so far uncharacterized, putative L,D-transpeptidase protein YciB. Evidence is shown that YciB localizes to the cell poles. YciB localization depends on the existence of a mature divisome, suggesting that L,D-transpeptidases are, like penicillin-binding proteins, part of the divisome.
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