Prepatterning by RhoGEFs governs Rho GTPase spatiotemporal dynamics during wound repair.
Prepatterning by RhoGEFs governs Rho GTPase spatiotemporal dynamics during wound repair.
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DOI:
10.1083/jcb.201704145
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发表时间:
2017-12-04
期刊:
影响因子:
--
通讯作者:
Parkhurst SM
中科院分区:
文献类型:
--
作者:
Nakamura M;Verboon JM;Parkhurst SM
During wound repair, Rho GTPases form dynamic spatial and temporal patterns surrounding the wound and coordinate the cytoskeletal response. Nakamura et al. show that Rho GTPase arrays form in response to prepatterning by RhoGEFs, which depends on annexin B9. Like tissues, single cells are subjected to continual stresses and damage. As such, cells have a robust wound repair mechanism comprised of dynamic membrane resealing and cortical cytoskeletal remodeling. One group of proteins, the Rho family of small guanosine triphosphatases (GTPases), is critical for this actin and myosin cytoskeletal response in which they form distinct dynamic spatial and temporal patterns/arrays surrounding the wound. A key mechanistic question, then, is how these GTPase arrays are formed. Here, we show that in the Drosophila melanogaster cell wound repair model Rho GTPase arrays form in response to prepatterning by Rho guanine nucleotide exchange factors (RhoGEFs), a family of proteins involved in the activation of small GTPases. Furthermore, we show that Annexin B9, a member of a class of proteins associated with the membrane resealing, is involved in an early, Rho family–independent, actin stabilization that is integral to the formation of one RhoGEF array. Thus, Annexin proteins may link membrane resealing to cytoskeletal remodeling processes in single cell wound repair.
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影响因子:
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DOI:
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发表时间:
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期刊:
The Journal of cell biology
影响因子:
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通讯作者:
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