COPB1

Metabolic proteins, Plasma proteins

Intracellular

Low cell type specificity

Low immune cell specificity

Low cell line specificity

Oligomeric complex that consists of at least the alpha, beta, beta', gamma, delta, epsilon and zeta subunits. Interacts with SCYL1. Interacts with COPG1. Interacts (via trunk domain) with ARF1 (via switch I region); the interaction is direct. Interacts with KCNK2/TREK (via N-terminus); this interaction increases the channel-mediated whole cell currents and promotes plasma membrane expression of KCNK2/TREK. Interacts with anthrax lethal factor (LF); this interaction may facilitate endosomal vesicle membrane translocation of LF and its release from the lumen of endosomal vesicles to external milieu. Interacts with CAPN8 and PRKCE (By similarity). Interacts with ARF1 (myristoylated); this interaction is required for binding of COPB1 to Golgi membranes (By similarity). Interacts with STX17 (By similarity). Interacts with TMEM115. Interacts with HLA-G-B2M complex; this interaction mediates the endoplasmic reticulum (ER) retrieval of HLA-E-B2M complexes that bind low affinity peptides. Interacts with TMEM41B (PubMed:30352685). (Microbial infection) Interacts (via C-terminus) with HIV-1 Nef; the interaction is direct.