Necessary for adaptor protein complex 1 (AP-1)-dependent transport between the trans-Golgi network and endosomes. Regulates the membrane association of AP1G1/gamma1-adaptin, one of the subunits of the AP-1 adaptor complex. The direct interaction with AP1G1/gamma1-adaptin attenuates the release of the AP-1 complex from membranes. Regulates endosomal membrane traffic via association with AP-1 and KIF5B thus linking kinesin-based plus-end-directed microtubular transport to AP-1-dependent membrane traffic. May act as effector of AP-1 in calcium-induced endo-lysosome secretion. Inhibits Arp2/3 complex function; negatively regulates cell spreading, size and motility via intracellular sequestration of the Arp2/3 complex.
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AP1AR: Necessary for AP-1 dependent transport between the trans-Golgi network and endosomes. Regulates the membrane association of AP1G1/Gamma1-adaptin, one of the subunits of the AP-1 adapter complex. The direct interaction with AP1G1/Gamma1- adaptin attenuates the release of the AP-1 complex from membranes. 2 isoforms of the human protein are produced by alternative splicing.
Protein type: Vesicle
Chromosomal Location of Human Ortholog: 4q25
Cellular Component: endosome; Golgi apparatus; transport vesicle
Molecular Function: kinesin binding
Biological Process: negative regulation of receptor recycling; vesicle targeting, trans-Golgi to endosome
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