Impairment of dynamin's GAP domain stimulates receptor-mediated endocytosis receptor-mediated endocytosis

Sanja Sever, Amy B. Muhlberg, Sandra L. Schmid

Research output: Contribution to journalArticlepeer-review

310 Scopus citations

Abstract

Dynamin is a GTP-hydrolysing protein that is an essential participant in clathrin-mediated endocytosis by cells. It self-assembles into 'collars' in vitro which also form in vivo at the necks of invaginated coated pits. This self-assembly stimulates dynamin's GTPase activity and it has been proposed that dynamin hydrolyses GTP In order to generate the force needed to sever vesicles from the plasma membrane. A mechanism is now described in which self-assembly of dynamin Is coordinated by a domain of dynamin with a GTPase- activating function. Unexpectedly, when dynamin mutants defective In self- assembly-stimulated GTPase activity are overexpressed, receptor-mediated endocytosis is accelerated. The results Indicate that dynamin, like other members of the GTPase superfamily, functions as a molecular regulator in receptor-mediated endocytosis, rather than as a force-generating GTPase.

Original languageEnglish (US)
Pages (from-to)481-486
Number of pages6
JournalNature
Volume398
Issue number6727
DOIs
StatePublished - Apr 8 1999

ASJC Scopus subject areas

  • General

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