Nuf, a Rab11 Effector, Maintains Cytokinetic Furrow Integrity by Promoting Local Actin Polymerization

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Nuf, a Rab11 Effector, Maintains Cytokinetic Furrow Integrity by Promoting Local Actin Polymerization

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Title: Nuf, a Rab11 Effector, Maintains Cytokinetic Furrow Integrity by Promoting Local Actin Polymerization
Author: Cao, Jian; Albertson, Roger; Riggs, Blake; Field, Christine Marie; Sullivan, William McHugh

Note: Order does not necessarily reflect citation order of authors.

Citation: Cao, Jian, Roger Albertson, Blake Riggs, Christine Marie Field, and William McHugh Sullivan. 2008. Nuf, a Rab11 effector, maintains cytokinetic furrow integrity by promoting local actin polymerization. Journal of Cell Biology 182(2): 301-313.
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Abstract: Plasma membrane ingression during cytokinesis involves both actin remodeling and vesicle-mediated membrane addition. Vesicle-based membrane delivery from the recycling endosome (RE) has an essential but ill-defined involvement in cytokinesis. In the Drosophila melanogaster early embryo, Nuf (Nuclear fallout), a Rab11 effector which is essential for RE function, is required for F-actin and membrane integrity during furrow ingression. We find that in nuf mutant embryos, an initial loss of F-actin at the furrow is followed by loss of the associated furrow membrane. Wild-type embryos treated with Latrunculin A or Rho inhibitor display similar defects. Drug- or Rho-GTP–induced increase of actin polymerization or genetically mediated decrease of actin depolymerization suppresses the nuf mutant F-actin and membrane defects. We also find that RhoGEF2 does not properly localize at the furrow in nuf mutant embryos and that RhoGEF2–Rho1 pathway components show strong specific genetic interactions with Nuf. We propose a model in which RE-derived vesicles promote furrow integrity by regulating the rate of actin polymerization through the RhoGEF2–Rho1 pathway.
Published Version: doi: 10.1083/jcb.200712036
Other Sources: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2483530/pdf/
Terms of Use: This article is made available under the terms and conditions applicable to Other Posted Material, as set forth at http://nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of-use#LAA
Citable link to this page: http://nrs.harvard.edu/urn-3:HUL.InstRepos:4727707

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