Cell division site placement and asymmetric growth in mycobacteria.
Cell division site placement and asymmetric growth in mycobacteria.
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DOI:
10.1371/journal.pone.0044582
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发表时间:
2012
期刊:
影响因子:
3.7
通讯作者:
Robertson BD
中科院分区:
文献类型:
--
作者:
Joyce G;Williams KJ;Robb M;Noens E;Tizzano B;Shahrezaei V;Robertson BD
Mycobacteria are members of the actinomycetes that grow by tip extension and lack apparent homologues of the known cell division regulators found in other rod-shaped bacteria. Previous work using static microscopy on dividing mycobacteria led to the hypothesis that these cells can grow and divide asymmetrically, and at a wide range of sizes, in contrast to the cell growth and division patterns observed in the model rod-shaped organisms. In this study, we test this hypothesis using live-cell time-lapse imaging of dividing Mycobacterium smegmatis labelled with fluorescent PBP1a, to probe peptidoglycan synthesis and label the cell septum. We demonstrate that the new septum is placed accurately at mid-cell, and that the asymmetric division observed is a result of differential growth from the cell tips, with a more than 2-fold difference in growth rate between fast and slow growing poles. We also show that the division site is not selected at a characteristic cell length, suggesting this is not an important cue during the mycobacterial cell cycle.
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DOI:
10.1073/pnas.42.9.574
发表时间:
1956-01-01
影响因子:
11.1
作者:
LEDERBERG, J
通讯作者:
LEDERBERG, J
影响因子:
3.7
作者:
Dziedzic R;Kiran M;Plocinski P;Ziolkiewicz M;Brzostek A;Moomey M;Vadrevu IS;Dziadek J;Madiraju M;Rajagopalan M
通讯作者:
Rajagopalan M
影响因子:
1.8
作者:
Joyce G;Robertson BD;Williams KJ
通讯作者:
Williams KJ
影响因子:
3.2
作者:
Plocinski, P.;Ziolkiewicz, M.;Rajagopalan, M.
通讯作者:
Rajagopalan, M.
影响因子:
4.8
作者:
Born, Petra;Breukink, Eefjan;Vollmer, Waldemar
通讯作者:
Vollmer, Waldemar