Host-Polarized Cell Growth in Animal Symbionts.
Host-Polarized Cell Growth in Animal Symbionts.
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DOI:
10.1016/j.cub.2018.02.028
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发表时间:
2018-04-02
期刊:
影响因子:
--
通讯作者:
Bulgheresi S
中科院分区:
文献类型:
--
作者:
Pende N;Wang J;Weber PM;Verheul J;Kuru E;Rittmann SKR;Leisch N;VanNieuwenhze MS;Brun YV;den Blaauwen T;Bulgheresi S
To determine the fundamentals of cell growth, we must extend cell biological studies to non-model organisms. Here, we investigated the growth modes of the only two rods known to widen instead of elongating, Candidatus Thiosymbion oneisti and Thiosymbion hypermnestrae. These bacteria are attached by one pole to the surface of their respective nematode hosts. By incubating live Ca. T. oneisti and T. hypermnestrae with a peptidoglycan metabolic probe, we observed that the insertion of new cell wall starts at the poles and proceeds inward, concomitantly with FtsZ-based membrane constriction. Remarkably, in Ca. T. hypermnestrae, the proximal, animal-attached pole grows before the distal, free pole, indicating that the peptidoglycan synthesis machinery is host oriented. Immunostaining of the symbionts with an antibody against the actin homolog MreB revealed that it was arranged medially—that is, parallel to the cell long axis—throughout the symbiont life cycle. Given that depolymerization of MreB abolished newly synthesized peptidoglycan insertion and impaired divisome assembly, we conclude that MreB function is required for symbiont widening and division. In conclusion, our data invoke a reassessment of the localization and function of the bacterial actin homolog. Pende et al. show that cell growth is host oriented in two marine nematode-attached bacteria. In contrast to what is observed in model rods, the actin homolog MreB of the symbionts is arranged parallel to the cell long axis throughout the cell cycle. This medial MreB ring is essential for symbiont growth and division.
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DOI:
10.1002/anie.201206749
发表时间:
2012-12-07
期刊:
Angewandte Chemie (International ed. in English)
影响因子:
--
作者:
Kuru E;Hughes HV;Brown PJ;Hall E;Tekkam S;Cava F;de Pedro MA;Brun YV;VanNieuwenhze MS
通讯作者:
VanNieuwenhze MS
影响因子:
3.6
作者:
Koppelman, CM;Aarsman, MEG;den Blaauwen, T
通讯作者:
den Blaauwen, T
影响因子:
28.3
作者:
Leisch, Nikolaus;Pende, Nika;Bulgheresi, Silvia
通讯作者:
Bulgheresi, Silvia
DOI:
10.1073/pnas.0604503103
发表时间:
2006-07-18
影响因子:
11.1
作者:
Kim, So Yeon;Gitai, Zemer;Moerner, W. E.
通讯作者:
Moerner, W. E.
DOI:
10.1073/pnas.0305747101
发表时间:
2004-01-20
影响因子:
11.1
作者:
Janakiraman, A;Goldberg, MB
通讯作者:
Goldberg, MB