Ciboulot Regulates Actin Assembly during Drosophila Brain Metamorphosis

A dynamic actin cytoskeleton is essential for the remodeling of cell shape during development, but the specific roles of many actin partners remain unclear. Here we characterize a novel actin binding protein, Ciboulot (Cib), which plays a major role in axonal growth during Drosophila brain metamorph...

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Veröffentlicht in:Cell 2000-09, Vol.102 (6), p.797-808
Hauptverfasser: Boquet, Isabelle, Boujemaa, Rajaa, Carlier, Marie-France, Préat, Thomas
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creator Boquet, Isabelle
Boujemaa, Rajaa
Carlier, Marie-France
Préat, Thomas
description A dynamic actin cytoskeleton is essential for the remodeling of cell shape during development, but the specific roles of many actin partners remain unclear. Here we characterize a novel actin binding protein, Ciboulot (Cib), which plays a major role in axonal growth during Drosophila brain metamorphosis. Loss of Cib function leads to axonal growth defects in the central brain, while overexpression of the gene during development leads to overgrown projections. The Cib protein displays strong sequence similarity to β-thymosins but has biochemical properties like profilin: the Cib-actin complex participates in actin filament assembly exclusively at the barbed end, and Cib enhances actin-based motility in vitro. Genetic experiments show that Cib and the Drosophila profilin protein Chickadee (Chic) cooperate in central brain metamorphosis.
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subjects actin
Actins
Actins - metabolism
Animals
Brain
Brain - cytology
Brain - embryology
Brain - metabolism
Cell Differentiation
Cell Differentiation - physiology
Cell Size
Cell Size - physiology
Contractile Proteins
Drosophila
Drosophila - embryology
Drosophila melanogaster
Drosophila Proteins
Gene Expression Regulation, Developmental
Life Sciences
Listeria monocytogenes
Listeria monocytogenes - metabolism
Metamorphosis, Biological
Metamorphosis, Biological - physiology
Microfilament Proteins
Microfilament Proteins - genetics
Microfilament Proteins - metabolism
Molecular Sequence Data
Movement
Mutagenesis
Mutagenesis - physiology
Nerve Tissue Proteins
Neurons
Neurons - physiology
Neurons and Cognition
Profilins
Repetitive Sequences, Nucleic Acid
Sequence Homology, Amino Acid
Thymosin
Thymosin - genetics
title Ciboulot Regulates Actin Assembly during Drosophila Brain Metamorphosis
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