Enthoprotin, a newly identified component of clathrin-coated vesicles, interacts with the trans-Golgi network (TGN) clathrin adapters AP-1 and GGA2. Here we perform a multi-faceted analysis of the site in enthoprotin that is responsible for the binding to the gamma-adaptin ear (gamma-ear) domain of AP-1. Alanine scan mutagenesis and nuclear magnetic resonance (NMR) studies reveal the full extent of the site as well as critical residues for this interaction. NMR studies of the gamma-ear in complex with a synthetic peptide from enthoprotin provide structural details of the binding site for TGN accessory proteins within the gamma-ear.
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Wasiak et al. (2003) studied this question.
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