Journal
MOLECULAR BIOLOGY OF THE CELL
Volume 24, Issue 15, Pages 2378-2388Publisher
AMER SOC CELL BIOLOGY
DOI: 10.1091/mbc.E12-12-0860
Keywords
-
Categories
Funding
- National Institutes of Health [GM077569, NS42599]
- Emory University Research Committee
- National Research Service Award Fellowship [F31NS0765]
- National Institute of Environmental Health Sciences of the National Institutes of Health [P01ES016731, T32ES012870]
- Emory University Integrated Cellular Imaging Microscopy Core and Viral Cores of the Emory Neuroscience National Institute of Neurological Disorders and Stroke Core Facilities [P30NS055077]
- MRC [G120/952] Funding Source: UKRI
- NATIONAL INSTITUTE OF ENVIRONMENTAL HEALTH SCIENCES [P01ES016731, T32ES012870] Funding Source: NIH RePORTER
- NATIONAL INSTITUTE OF GENERAL MEDICAL SCIENCES [R01GM077569, T32GM008169] Funding Source: NIH RePORTER
- NATIONAL INSTITUTE OF NEUROLOGICAL DISORDERS AND STROKE [R01NS042599, P30NS055077, R56NS042599] Funding Source: NIH RePORTER
Ask authors/readers for more resources
A role for clathrin in AP-3-dependent vesicle biogenesis has been inferred from biochemical interactions and colocalization between this adaptor and clathrin. The functionality of these molecular associations, however, is controversial. We comprehensively explore the role of clathrin in AP-3-dependent vesicle budding, using rapid chemical-genetic perturbation of clathrin function with a clathrin light chain-FKBP chimera oligomerizable by the drug AP20187. We find that AP-3 interacts and colocalizes with endogenous and recombinant FKBP chimeric clathrin polypeptides in PC12-cell endosomes. AP-3 displays, however, a divergent behavior from AP-1, AP-2, and clathrin chains. AP-3 cofractionates with clathrin-coated vesicle fractions isolated from PC12 cells even after clathrin function is acutely inhibited by AP20187. We predicted that AP20187 would inhibit AP-3 vesicle formation from endosomes after a brefeldin A block. AP-3 vesicle formation continued, however, after brefeldin A wash-out despite impairment of clathrin function by AP20187. These findings indicate that AP-3-clathrin association is dispensable for endosomal AP-3 vesicle budding and suggest that endosomal AP-3-clathrin interactions differ from those by which AP-1 and AP-2 adaptors productively engage clathrin in vesicle biogenesis.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available