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

Gamma-synergin: an EH domain-containing protein that interacts with gamma-adaptin.

The AP-1 adaptor complex is associated with the TGN, where it links selected membrane proteins to the clathrin lattice, enabling these proteins to be concentrated in clathrin-coated vesicles. To identify other proteins that participate in the clathrin-coated vesicle cycle at the TGN, we have carried out a yeast two- hybrid library screen using the gamma-adaptin subunit of the AP-1 complex as bait. Two novel, ubiquitously expressed proteins were found: p34, which interacts with both gamma-adaptin and alpha-adaptin, and gamma-synergin, an alternatively spliced protein with an apparent molecular mass of approximately 110-190 kD, which only interacts with gamma-adaptin. gamma-Synergin is associated with AP-1 both in the cytosol and on TGN membranes, and it is strongly enriched in clathrin-coated vesicles. It binds directly to the ear domain of gamma-adaptin and it contains an Eps15 homology (EH) domain, although the EH domain is not part of the gamma-adaptin binding site. In cells expressing alpha-adaptin with the gamma-adaptin ear, a construct that goes mainly to the plasma membrane, much of the gamma-synergin is also rerouted to the plasma membrane, indicating that it follows AP-1 onto membranes rather than leading it there. The presence of an EH domain suggests that gamma-synergin links the AP-1 complex to another protein or proteins.[1]

References

  1. Gamma-synergin: an EH domain-containing protein that interacts with gamma-adaptin. Page, L.J., Sowerby, P.J., Lui, W.W., Robinson, M.S. J. Cell Biol. (1999) [Pubmed]
 
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