Nitric oxide regulates endocytosis by S-nitrosylation of dynamin.

Published

Journal Article

The GTPase dynamin regulates endocytic vesicle budding from the plasma membrane, but the molecular mechanisms involved remain incompletely understood. We report that dynamin, which interacts with NO synthase, is S-nitrosylated at a single cysteine residue (C607) after stimulation of the beta(2) adrenergic receptor. S-nitrosylation increases dynamin self-assembly and GTPase activity and facilitates its redistribution to the membrane. A mutant protein bearing a C607A substitution does not self-assemble properly or increase its enzymatic activity in response to NO. In NO-generating cells, expression of dynamin C607A, like the GTPase-deficient dominant-negative K44A dynamin, inhibits both beta(2) adrenergic receptor internalization and bacterial invasion. Furthermore, exogenous or endogenously produced NO enhances internalization of both beta(2) adrenergic and epidermal growth factor receptors. Thus, NO regulates endocytic vesicle budding by S-nitrosylation of dynamin. Collectively, our data suggest a general NO-dependent mechanism by which the trafficking of receptors may be regulated and raise the idea that pathogenic microbes and viruses may induce S-nitrosylation of dynamin to facilitate cellular entry.

Full Text

Duke Authors

Cited Authors

  • Wang, G; Moniri, NH; Ozawa, K; Stamler, JS; Daaka, Y

Published Date

  • January 31, 2006

Published In

Volume / Issue

  • 103 / 5

Start / End Page

  • 1295 - 1300

PubMed ID

  • 16432212

Pubmed Central ID

  • 16432212

International Standard Serial Number (ISSN)

  • 0027-8424

Digital Object Identifier (DOI)

  • 10.1073/pnas.0508354103

Language

  • eng

Conference Location

  • United States