ADP-ribosylation factor 1

UniProtKB accession:  P84078

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UniProtKB description:  Small GTPase involved in protein trafficking between different compartments (PubMed:11950392). Modulates vesicle budding and uncoating within the Golgi complex (By similarity). In its GTP-bound form, triggers the recruitment of coatomer proteins to the Golgi membrane (By similarity). The hydrolysis of ARF1-bound GTP, which is mediated by ARFGAPs proteins, is required for dissociation of coat proteins from Golgi membranes and vesicles (By similarity). The GTP-bound form interacts with PICK1 to limit PICK1-mediated inhibition of Arp2/3 complex activity; the function is linked to AMPA receptor (AMPAR) trafficking, regulation of synaptic plasticity of excitatory synapses and spine shrinkage during long-term depression (LTD) (By similarity). Plays a key role in the regulation of intestinal stem cells and gut microbiota, and is essential for maintaining intestinal homeostasis (PubMed:36566324). Plays also a critical role in mast cell expansion but not in mast cell maturation by facilitating optimal mTORC1 activation (PubMed:37392777).