The structures of COPI-coated vesicles reveal alternate coatomer conformations and interactions

Faini, M., Prinz, S., Beck, R., Schorb, M., Riches, J.D., Bacia, K., Brugger, B., Wieland, F.T., & Briggs, J.A.G. (2012) The structures of COPI-coated vesicles reveal alternate coatomer conformations and interactions. Science, 336(6087), pp. 1451-1454.

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Abstract

Transport between compartments of eukaryotic cells is mediated by coated vesicles. The archetypal protein coats COPI, COPII, and clathrin are conserved from yeast to human. Structural studies of COPII and clathrin coats assembled in vitro without membranes suggest that coat components assemble regular cages with the same set of interactions between components. Detailed three-dimensional structures of coated membrane vesicles have not been obtained. Here, we solved the structures of individual COPI-coated membrane vesicles by cryoelectron tomography and subtomogram averaging of in vitro reconstituted budding reactions. The coat protein complex, coatomer, was observed to adopt alternative conformations to change the number of other coatomers with which it interacts and to form vesicles with variable sizes and shapes. This represents a fundamentally different basis for vesicle coat assembly.

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ID Code: 57660
Item Type: Journal Article
Refereed: Yes
Additional Information: Articles free to read on journal website after if you register
Keywords: cryo electron tomography, transport
DOI: 10.1126/science.1221443
ISSN: 1095-9203
Subjects: Australian and New Zealand Standard Research Classification > BIOLOGICAL SCIENCES (060000) > BIOCHEMISTRY AND CELL BIOLOGY (060100) > Protein Trafficking (060108)
Australian and New Zealand Standard Research Classification > BIOLOGICAL SCIENCES (060000) > BIOCHEMISTRY AND CELL BIOLOGY (060100) > Structural Biology (incl. Macromolecular Modelling) (060112)
Divisions: Current > Institutes > Institute for Future Environments
Copyright Owner: Copyright 2012 American Association for the Advancement of Science
Deposited On: 27 Feb 2013 00:52
Last Modified: 02 Feb 2015 21:12

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