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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 

Gamma-adaptin interacts directly with Rabaptin-5 through its ear domain.

In yeast two-hybrid screening using gamma1-adaptin, a subunit of the AP-1 adaptor complex of clathrin-coated vesicles derived from the trans-Golgi network (TGN), as bait, we found that it could interact with Rabaptin-5, an effector of Rab5 and Rab4 that regulates membrane docking with endosomes. Further two-hybrid analysis revealed that the interaction occurs between the ear domain of gamma1-adaptin and the COOH-terminal coiled-coil region of Rabaptin-5. Pull down assay with a fusion protein between glutathione S-transferase and the ear domain of gamma1-adaptin and coimmunoprecipitation analysis revealed that the interaction occurs in vitro and in vivo. Immunocytochemical analysis showed that gamma1-adaptin and Rabaptin-5 colocalize to a significant extent on perinuclear structures, probably on recycling endosomes, and are redistributed into the cytoplasm upon treatment with brefeldin A. These results suggest that the gamma1-adaptin-Rabaptin-5 interaction may play a role in membrane trafficking between the TGN and endosomes.[1]

References

  1. Gamma-adaptin interacts directly with Rabaptin-5 through its ear domain. Shiba, Y., Takatsu, H., Shin, H.W., Nakayama, K. J. Biochem. (2002) [Pubmed]
 
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