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Actin filaments (F-actin) are composed of actin subunits. The dissociation of actin monomers can occur from either end of F-actin. The rate of dissociation is faster from the minus-end or the pointed end, where the actin subunits exist with a bound ADP, together known as ADP-actin. The depolymerization of F-actin is aided by proteins, including the actin-depolymerizing factor (ADF) and cofilin family of proteins, gelsolin, and glia maturation factor (GMF).
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The straight or branched structure formation of actin filaments is controlled by nucleating proteins such as the formins and Arp2/3 complex. Formin-mediated assembly results in straight filaments, whereas Arp2/3 protein complex-mediated assembly results in branched actin filaments.
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Actin Depolymerizing Factor Destrin Regulates Cilia Development and Function during Vertebrate Embryogenesis.

Youni Kim1, Hyun-Kyung Lee1, Kyeong-Yeon Park1

  • 1KNU G-LAMP Project Group, KNU Institute of Basic Sciences, School of Life Sciences, BK21 FOUR KNU Creative BioResearch Group, College of Natural Sciences, Kyungpook National University, Daegu 41566, Korea.

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|October 24, 2024
PubMed
Summary
This summary is machine-generated.

Destrin, a protein regulating actin dynamics, is crucial for cilia development. Its absence impacts multicilia formation, cilia motility, and primary cilia length in vertebrates.

Keywords:
CiliogenesisDestrinF-actinMulticiliated cellsPrimary ciliaXenopus laevis

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Area of Science:

  • Cell Biology
  • Developmental Biology
  • Cytoskeleton Dynamics

Background:

  • The actin cytoskeleton is vital for ciliogenesis.
  • Destrin regulates actin dynamics but its role in cilia development is unclear.

Purpose of the Study:

  • To investigate the function of destrin in ciliogenesis.
  • To elucidate destrin's role in primary and multicilia development.

Main Methods:

  • Studied destrin's function in Xenopus laevis and human RPE1 cells.
  • Utilized immunofluorescence with ciliary component markers.

Main Results:

  • Loss of destrin increased multiciliated cells and reduced cilia motility in Xenopus.
  • Destrin depletion shortened primary cilia length in Xenopus and hRPE1 cells by affecting actin dynamics.
  • Destrin modulates basal body directionality and axonemal elongation via actin dynamics, independent of basal body docking.

Conclusions:

  • Destrin is a significant regulator of vertebrate ciliogenesis for both primary and multicilia.
  • Actin dynamics, modulated by destrin, are critical for cilia development.