Description
Product Characteristics:
Rab proteins, a family of Ras-related small GTP-binding proteins, play a key role in regulating intracellular vesicle trafficking (1?). Rab GDP dissociation inhibitor (Rab GDI or GDI2) forms a soluble complex with Rab proteins and thereby prevents the exchange of GDP for GTP (1?). In mammals, there exist two major isoforms, Rab GDI alpha (also known as XAP-4) and Rab GDI beta (1,4). While the mammalian Rab GDI beta-genes are ubiquitously expressed, the Rab GDI ?genes are predominantly brain-specific (1). Since it is expressed predominantly in neural and sensory tissues, Rab GDI a may serve a specific function in neural signal transmission (5). The gene sequences for the Rab GDI proteins are extremely conserved in evolution, with substantial homology preserved across three eukaryotic kingdoms (5).
Subcellular location: Cytoplasm
Synonyms: 1A, FLJ41411, GDI-1, gdi1, GDIA_HUMAN, GDIL, GDP dissociation inhibitor 1, Guanosine diphosphate dissociation inhibitor 1, Mental retardation X-linked 41, Mental retardation X-linked 48, MRX41, MRX48, Oligophrenin 2, Oligophrenin-2, OPHN2, Protein XAP 4, Protein XAP-4, Protein XAP4, Rab GDI alpha, Rab GDP dissociation inhibitor alpha, RABGD1A, RABGDIA, XAP 4.
Target Information: GDP dissociation inhibitors are proteins that regulate the GDP-GTP exchange reaction of members of the rab family, small GTP-binding proteins of the ras superfamily, that are involved in vesicular trafficking of molecules between cellular organelles. GDIs slow the rate of dissociation of GDP from rab proteins and release GDP from membrane-bound rabs. GDI1 is expressed primarily in neural and sensory tissues. Mutations in GDI1 have been linked to X-linked nonspecific mental retardation. [provided by RefSeq, Jul 2008]