Structure and mechanism of COPI vesicle biogenesis

Distinct trafficking pathways within the secretory and endocytic systems ensure prompt and precise delivery of specific cargo molecules to different cellular compartments via small vesicular (50–150 nm) and tubular carriers. The COPI vesicular coat is required for retrograde trafficking from the cis...

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Bibliographic Details
Published in:Current opinion in cell biology 2014-08, Vol.29, p.67-73
Main Author: Jackson, Lauren P
Format: Article
Language:English
Subjects:
Animals
Biological Transport
Coat Protein Complex I - metabolism
COP-Coated Vesicles - chemistry
COP-Coated Vesicles - metabolism
COP-Coated Vesicles - ultrastructure
Dipeptides - metabolism
Guanosine Triphosphate - metabolism
Humans
Internal Medicine
Protein Binding
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Summary:Distinct trafficking pathways within the secretory and endocytic systems ensure prompt and precise delivery of specific cargo molecules to different cellular compartments via small vesicular (50–150 nm) and tubular carriers. The COPI vesicular coat is required for retrograde trafficking from the cis -Golgi back to the ER and within the Golgi stack. Recent structural data have been obtained from X-ray crystallographic studies on COPI coat components alone and on COPI subunits in complex with either cargo motifs or Arf1, and from reconstructions of COPI coated vesicles by electron tomography. These studies provide important molecular information and indicate key differences in COPI coat assembly as compared with clathrin-based and COPII-based coats.
ISSN:0955-0674
1879-0410
DOI:10.1016/j.ceb.2014.04.009