Stimulation of dynamin GTPase activity by amphiphysin

Yumi Yoshida, Kohji Takei

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Dynamin functions in the fission of endocytic pits in the process of clathrin-mediated endocytosis. Dynamin GTPase activity is essential for its fission activity, and it is stimulated by self-assembly as well as by interacting with its binding partners, such as microtubules, SH3 domain containing proteins, or inositol phospholipids. Amphiphysin 1, SH3 domain-containing binding partner of dynamin 1, is proposed to cooperatively function in endocytosis. Amphiphysin 1 is essential for dynamin-dependent synaptic vesicle recycling in the synapse, and it enhances dynamin-dependent vesicle formation in vitro. In order to elucidate the molecular mechanism underlying the amphiphysin's effect, we measured dynamin GTPase activity in the presence of both amphiphysin 1 and lipid membranes. We describe here in detail the procedure of the dynamin GTPase assay and the results demonstrating stimulatory effect of amphiphysin on dynamin GTPase activity, which is highly dependent on the liposome size.

Original languageEnglish
Article number46
Pages (from-to)528-537
Number of pages10
JournalMethods in Enzymology
Volume404
DOIs
Publication statusPublished - 2006

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Dynamins
GTP Phosphohydrolases
src Homology Domains
Endocytosis
Dynamin I
Clathrin
Synaptic Vesicles
Membrane Lipids
Phosphatidylinositols
amphiphysin
Liposomes
Microtubules
Synapses
Self assembly
Recycling
Assays

ASJC Scopus subject areas

  • Biochemistry

Cite this

Stimulation of dynamin GTPase activity by amphiphysin. / Yoshida, Yumi; Takei, Kohji.

In: Methods in Enzymology, Vol. 404, 46, 2006, p. 528-537.

Research output: Contribution to journalArticle

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