On the spontaneous emergence of cell polarity.
On the spontaneous emergence of cell polarity.
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DOI:
10.1038/nature07119
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发表时间:
2008-08-14
期刊:
影响因子:
64.8
通讯作者:
Wu, Lani F.
中科院分区:
文献类型:
--
作者:
Altschuler, Steven J.;Angenent, Sigurd B.;Wang, Yanqin;Wu, Lani F.
Diverse cell polarity networks require positive feedback for locally amplifying distributions of signalling molecules at the plasma membrane. Additional mechanisms, such as directed transport or coupled inhibitors, have been proposed to be required for reinforcing a unique axis of polarity. Here, we analyze a simple model of positive feedback, with strong analogy to the classical “stepping stone” model of population genetics, in which a single species of diffusible, membrane-bound signalling molecules can self-recruit from a cytoplasmic pool. We identify an intrinsic stochastic mechanism through which positive feedback alone is sufficient to account for the spontaneous establishment of a single site of polarity. We find that the polarization frequency has an inverse dependence on the number of signalling molecules: the frequency of polarization decreases as the number of molecules becomes large. Experimental observation of polarizing Cdc42 in budding yeast is consistent with this prediction. Our work suggests that positive feedback can work alone or with additional mechanisms to create robust cell polarity.
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影响因子:
56.9
作者:
Wedlich-Soldner, R;Altschuler, SJ;Li, R
通讯作者:
Li, R
影响因子:
56.9
作者:
Sueel, Guerol M.;Kulkarni, Rajan P.;Elowitz, Michael B.
通讯作者:
Elowitz, Michael B.
影响因子:
11.8
作者:
Ozbudak, EM;Becskei, A;van Oudenaarden, A
通讯作者:
van Oudenaarden, A
DOI:
10.1098/rstb.1952.0012
发表时间:
1952-01-01
期刊:
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY OF LONDON SERIES B-BIOLOGICAL SCIENCES
影响因子:
--
作者:
TURING, AM
通讯作者:
TURING, AM
影响因子:
3.4
作者:
Kozlov, Michael M.;Mogilner, Alex
通讯作者:
Mogilner, Alex