Actin-depolymerizing factor mediates Rac/Rop GTPase-regulated pollen tube growth.

@article{Chen2003ActindepolymerizingFM,
  title={Actin-depolymerizing factor mediates Rac/Rop GTPase-regulated pollen tube growth.},
  author={Christine Y-h Chen and Alice Y. Cheung and Hen-Ming Wu},
  journal={The Plant cell},
  year={2003},
  volume={15 1},
  pages={237-49}
}
Pollen tube elongation is a rapid tip growth process that is driven by a dynamic actin cytoskeleton. A ubiquitous family of actin binding proteins, actin-depolymerizing factors (ADFs)/cofilins, bind to actin filaments, induce severing, enhance depolymerization from their slow-growing end, and are important for maintaining actin dynamics in vivo. ADFs/cofilins are regulated by multiple mechanisms, among which Rho small GTPase-activated phosphorylation at a terminal region Ser residue plays an… CONTINUE READING

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A mutant form of NtADF1 with a nonphosphorylatable Ala substitution at its Ser-6 position [ NtADF1(S6A ) ] shows increased activity , whereas the mutant NtADF1(S6D ) , which has a phospho - mimicking Asp substitution at the same position , shows reduced ability to counteract the effect of NtRac1 .
A mutant form of NtADF1 with a nonphosphorylatable Ala substitution at its Ser-6 position [ NtADF1(S6A ) ] shows increased activity , whereas the mutant NtADF1(S6D ) , which has a phospho - mimicking Asp substitution at the same position , shows reduced ability to counteract the effect of NtRac1 .
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