The gene RAB32 (Ras-related protein) is mapped to human chromosome 6q24.3. It is a Rab GTPase which is present in the mitochondria. The protein also has a transient phagosomal localization and is also present at the melanosome membrane.
Application
Anti-Rab32 antibody produced in rabbit has been used for western blotting and immunofluorescence.
Biochem/physiol Actions
RAB32 (Ras-related protein) controls intracellular lipid accumulation in hepatocytes. Absence of it promotes the expression of ATGL (adipose triglyceride lipase) and thereby causes lipolysis. RAB32 is involved in hepatic steatosis. In melanogenesis, it is involved in the transport of important enzymes, such as tyrosinase and Tyrp1 (tyrosinase related protein 1). RAB32 also interacts with and is involved in localization of leucine-rich repeat kinase 2 (LRRK2), a protein associated with Parkinson′s disease. RAB32 is hypermethylated in microsatellite-unstable colon, gastric and endometrial adenocarcinomas.
Rab32 facilitates mitochondrial anchoring of protein kinaseA (PKA) and mitochondrial dynamics. Rab32 was also found to be required for the formation of autophagic vacuoles.
Physical form
Solution in 0.01 M phosphate buffered saline, pH 7.4, containing 15 mM sodium azide.
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Frontiers in immunology, 11, 560110-560110 (2020-11-24)
HPS1, a BLOC-3 subunit that acts as a guanine nucleotide exchange factor of Rab32/38, may play a role in the removal of VAMP7 during the maturation of large dense core vesicles of Paneth cells. Loss of HPS1 impairs lysozyme secretion
A small GTPase, human Rab32, is required for the formation of autophagic vacuoles under basal conditions
Hirota Y, et al.
Cellular and Molecular Life Sciences, 66(17), 2913-2932 (2009)
Functional analysis of novel Rab GTPases identified in the proteome of purified Legionella-containing vacuoles from macrophages.
Hoffmann C, et al.
Cellular Microbiology, 16, 1034-1052 (2014)
Waschbusch D, et al.
<BIG>Rab32 interacts with SNX6 and affects retromer-dependent Golgi trafficking</BIG>
The Rab family of small GTPases regulate various aspects of cellular dynamics in eukaryotic cells. Membrane trafficking has emerged as central to the functions of leucine-rich repeat kinase 2 (LRRK2), which is associated with inherited and sporadic forms of Parkinson's
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