Identification of F-actin as the dynamic hub in a microbial-induced GTPase polarity circuit.
Identification of F-actin as the dynamic hub in a microbial-induced GTPase polarity circuit.
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DOI:
10.1016/j.cell.2011.11.063
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发表时间:
2012-02-17
期刊:
影响因子:
64.5
通讯作者:
Alto NM
中科院分区:
文献类型:
--
作者:
Orchard RC;Kittisopikul M;Altschuler SJ;Wu LF;Süel GM;Alto NM
Polarity in mammalian cells emerges from the assembly of signaling molecules into extensive biochemical interaction networks. Despite their complexity, bacterial pathogens have evolved parsimonious mechanisms to hijack these systems. Here, we develop a tractable experimental and theoretical model to uncover fundamental operating principles both in mammalian cell polarity and bacterial pathogenesis. Using synthetic derivatives of the enteropathogenic E. coli guanine-nucleotide exchange factor (GEF) Map, we discover that Cdc42 GTPase signal transduction is controlled by the interaction between Map and F-actin. Mathematical modeling reveals how actin dynamics coupled to a Map-dependent positive feedback loop spontaneously polarizes Cdc42 on the plasma membrane. By rewiring the pathogenic signaling circuit to operate through β-integrin stimulation, we further show how Cdc42 is polarized in response to an extracellular spatial cue. Thus, a molecular pathway of polarity is proposed, centered on the interaction between GEFs and F-actin, which is likely to function in diverse biological systems.
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影响因子:
64.8
作者:
通讯作者:
--
影响因子:
4.1
作者:
Upadhyay, Abhishek;Wu, Huan-Lin;Williams, Christopher;Field, Terry;Galyov, Edouard E.;van den Elsen, Jean M. H.;Bagby, Stefan
通讯作者:
Bagby, Stefan
DOI:
10.1073/pnas.0604891103
发表时间:
2006-10-03
影响因子:
11.1
作者:
Tobe, Toru;Beatson, Scott A.;Pallen, Mark J.
通讯作者:
Pallen, Mark J.
影响因子:
64.5
作者:
Co, Carl;Wong, Derek T.;Taunton, Jack
通讯作者:
Taunton, Jack
DOI:
10.1083/jcb.200210174
发表时间:
2003-02-03
期刊:
The Journal of cell biology
影响因子:
--
作者:
Svitkina TM;Bulanova EA;Chaga OY;Vignjevic DM;Kojima S;Vasiliev JM;Borisy GG
通讯作者:
Borisy GG