Protein transport. Regulator of membrane traffic from the Golgi apparatus towards the endoplasmic reticulum (ER). Has a low GTPase activity. Interacts with CCDC64; leads to its accumulation in the pericentrosomal region. Interacts with SCYL1BP1. Interacts with VSP52 and RABGAP1. Interacts with GCC2 (via its GRIP domain). Interacts with RAB6IP1 (via its RUN 1 domain). Isoform 1 interacts with RAB6KIFL. Isoform 2 does not interact with RAB6KIFL. Isoform 1 interacts with BICD1. Isoform 2 interacts with BICD1. Isoform 1 interacts with BICD2. Isoform 2 interacts with BICD2. Interacts with TMF1. Isoform 1 (GTP-bound) interacts with DYNLRB1; the interaction is direct. Isoform 2 (GDP-bound) interacts with DYNLRB1; the interaction is direct. Interacts with PIFO/C1orf88. Ubiquitous. Belongs to the small GTPase superfamily. Rab family. 2 isoforms of the human protein are produced by alternative splicing. Note: This description may include information from UniProtKB.
Protein type: Motility/polarity/chemotaxis; G protein, monomeric; G protein, monomeric, Rab
Molecular Function: GTPase activity; protein domain specific binding; protein binding; GTP binding
Biological Process: antigen processing and presentation; GTP catabolic process; small GTPase mediated signal transduction; protein localization in Golgi apparatus; retrograde vesicle-mediated transport, Golgi to ER; peptidyl-cysteine methylation; protein targeting to Golgi
SS: The number of records in which this modification site was determined using site-specific methods. SS methods include amino acid sequencing, site-directed mutagenesis, modification site-specific antibodies, specific MS strategies, etc.