Asymmetrical distribution of the second messenger c-di-GMP upon bacterial cell division.

Asymmetrical distribution of the second messenger c-di-GMP upon bacterial cell division.
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DOI:
10.1126/science.1188658
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发表时间:
2010-06-04
期刊:
Science (New York, N.Y.)
影响因子:
--
通讯作者:
Miller SI
Miller SI
中科院分区:
其他
文献类型:
--
作者:
Christen M;Kulasekara HD;Christen B;Kulasekara BR;Hoffman LR;Miller SI

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细菌第二信使环二鸟苷一磷酸(c-di-GMP)调节细胞运动和细胞器和分子的合成,促进粘附到各种生物和非生物表面。这些性质可能需要c-di-GMP浓度的严格空间和时间调节。我们已经开发了基因编码的荧光共振能量转移(FRET)为基础的生物传感器,通过显微镜监测c-di-GMP浓度在单个细菌细胞内。在不同的革兰氏阴性细菌物种中观察到c-di-GMP的波动,并观察到其具有细胞周期依赖性。c-di-GMP在子代中的不对称分布与新月柄杆菌和铜绿假单胞菌的细胞分裂和极化时间相关。因此,观察到c-di-GMP的不对称分布作为细胞分裂的一部分,这可能表明细胞外细胞器生物合成或功能中的重要调节步骤。
The bacterial second messenger cyclic diguanosine monophosphate (c-di-GMP) regulates cellular motility and the synthesis of organelles and molecules that promote adhesion to a variety of biological and nonbiological surfaces. These properties likely require tight spatial and temporal regulation of c-di-GMP concentration. We have developed genetically encoded fluorescence resonance energy transfer (FRET)–based biosensors to monitor c-di-GMP concentrations within single bacterial cells by microscopy. Fluctuations of c-di-GMP were visualized in diverse Gram-negative bacterial species and observed to be cell cycle dependent. Asymmetrical distribution of c-di-GMP in the progeny correlated with the time of cell division and polarization for Caulobacter crescentus and Pseudomonas aeruginosa. Thus, asymmetrical distribution of c-di-GMP was observed as part of cell division, which may indicate an important regulatory step in extracellular organelle biosynthesis or function.
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