COPII: a membrane coat that forms endoplasmic reticulum-derived vesicles.
Vesicle budding from the endoplasmic reticulum (ER) has been reconstituted with washed membranes and three soluble proteins: Sec13 complex, Sec23 complex and the small GTPase Sar1p. The proteins that drive this cell-free vesicle budding reaction form an approximately 10 nm thick electron dense coat on ER-derived vesicles. Although the overall mechanism of membrane budding driven by various cytoplasmic coats appears similar, the constituents of this new membrane coat are molecularly distinct from the non-clathrin coat (COP) involved in intra-Golgi transport and the clathrin-containing coats. The new vesicle coat has been termed COPII.
Barlowe
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Department of Biochemistry, Dartmouth Medical School, Hanover, NH 03750, USA.
D001692:Biological Transport; D022181:COP-Coated Vesicles; D004721:Endoplasmic Reticulum / Q000378:metabolism*; D005656:Fungal Proteins / Q000378:metabolism*; D019204:GTP-Binding Proteins / Q000378:metabolism*; D020690:GTPase-Activating Proteins; D007425:Intracellular Membranes / Q000378:metabolism*; D008565:Membrane Proteins / Q000378:metabolism*; D020559:Monomeric GTP-Binding Proteins; D028861:Nuclear Pore Complex Proteins; D029701:Saccharomyces cerevisiae Proteins; D033921:Vesicular Transport Proteins
D005656:Fungal Proteins; D020690:GTPase-Activating Proteins; D008565:Membrane Proteins; D028861:Nuclear Pore Complex Proteins; C079620:SEC13 protein, S cerevisiae; C079037:SEC23 protein, S cerevisiae; D029701:Saccharomyces cerevisiae Proteins; D033921:Vesicular Transport Proteins; D019204:GTP-Binding Proteins; D020559:Monomeric GTP-Binding Proteins; C077395:SAR1 protein, S cerevisiae