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ID 48723
file
creator
Sakuma, Chisako
Kawauchi, Takeshi
Haraguchi, Shuka
Shikanai, Mima
Yamaguchi, Yoshifumi
Gelfand, Vladimir I
Luo, Liqun
Miura, Masayuki
abstract
Early endosomes are essential for regulating cell signalling and controlling the amount of cell surface molecules during neuronal morphogenesis. Early endosomes undergo retrograde transport (clustering) before their homotypic fusion. Small GTPase Rab5 is known to promote early endosomal fusion, but the mechanism linking the transport/clustering with Rab5 activity is unclear. Here we show that Drosophila Strip is a key regulator for neuronal morphogenesis. Strip knockdown disturbs the early endosome clustering, and Rab5-positive early endosomes become smaller and scattered. Strip genetically and biochemically interacts with both Glued (the regulator of dynein-dependent transport) and Sprint (the guanine nucleotide exchange factor for Rab5), suggesting that Strip is a molecular linker between retrograde transport and Rab5 activation. Overexpression of an active form of Rab5 in strip-mutant neurons suppresses the axon elongation defects. Thus, Strip acts as a molecular platform for the early endosome organization that has important roles in neuronal morphogenesis.
description
This work was supported by grants from the National Institute of General Medical Science of the National Institutes of Health (R01-GM085232 to V.I.G.), the National Institutes of Health (R01-DC005982 to L.L.), the Japanese Ministry of Education, Science, Sports, Culture, and Technology (MEXT), the Japan Society for the Promotion of Science, and the Japan Science and Technology Agency (to C.S., K.T., Y.Y., M.M., and T.C.).
journal title
Nature Communications
volume
Volume 5
start page
5180
date of issued
2014-10-14
publisher
Nature Publishing Group
issn
2041-1723
publisher doi
pubmed id
language
eng
nii type
Journal Article
HU type
Journal Articles
DCMI type
text
format
application/pdf
text version
publisher
rights
© 2014 Macmillan Publishers Limited.
relation url
department
Graduate School of Science