Dynamics of the COPII coat with GTP and stable analogues View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

2001-05-01

AUTHORS

Bruno Antonny, David Madden, Susan Hamamoto, Lelio Orci, Randy Schekman

ABSTRACT

We have developed an assay to monitor the assembly of the COPII coat onto liposomes in real time. We show that with Sar1pGTP bound to liposomes, a single round of assembly and disassembly of the COPII coat lasts a few seconds. The two large COPII complexes Sec23/24p and Sec13/31p bind almost instantaneously (in less than 1 s) to Sar1pGTP-doped liposomes. This binding is followed by a fast (less than 10 s) disassembly due to a 10-fold acceleration of the GTPase-activating protein activity of Sec23/24p by the Sec13/31p complex. Experiments with the phosphate analogue BeFx suggest that Sec23/24p provides residues directly involved in GTP hydrolysis on Sar1p. More... »

PAGES

531-537

Identifiers

URI

http://scigraph.springernature.com/pub.10.1038/35078500

DOI

http://dx.doi.org/10.1038/35078500

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1005889743

PUBMED

https://www.ncbi.nlm.nih.gov/pubmed/11389436


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