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A Bacterial Cell-Cycle Regulatory Network Operating in Time and Space
Harley H. McAdams* and
Lucy Shapiro
Transcriptional regulatory circuits provide only a fractionof the signaling pathways and regulatory mechanisms that controlthe bacterial cell cycle. The CtrA regulatory network, importantin control of the Caulobacter cell cycle, illustrates the criticalrole of nontranscriptional pathways and temporally and spatiallylocalized regulatory proteins. The system architecture of Caulobactercell-cycle control involves top-down control of modular functionsby a small number of master regulatory proteins with cross-modulesignaling coordinating the overall process. Modeling the cellcycle probably requires a top-down modeling approach and a hybridcontrol system modeling paradigm to treat its combined discreteand continuous characteristics.
Department of Developmental Biology, Stanford University School of Medicine, B300 Beckman Center, Stanford, CA 94305, USA.
* To whom correspondence should be addressed. E-mail: hmcadams{at}stanford.edu
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