title: Biochemical analysis of Rabin8, the guanine nucleotide exchange factor for Rab8.
abstract: The Rab GTPases are master regulators of endosomal trafficking in eukaryotic cells. Among them, Rab8 plays an important role in tubulovesicular trafficking from the trans-Golgi network and recycling endosomes to the plasma membrane. Rab8 is activated by its guanine nucleotide exchange factor, Rabin8. In order to understand the molecular mechanisms that control endosomal recycling to the plasma membrane, it is pivotal to understand how Rabin8 is regulated in cells. Recently, biochemical and cell biological studies have identified several mechanisms for Rabin8 activation, which involves the relief of the intramolecular autoinhibition of Rabin8. Here we describe biochemical methods that we have used recently to study the activation of Rabin8.
authors.affiliation: Department of Biology, University of Pennsylvania, Philadelphia, PA, USA.
authors.forename: Bin
authors.initials: B
authors.lastname: Wu
authors.affiliation: Department of Biology, University of Pennsylvania, Philadelphia, PA, USA.
authors.forename: Juanfei
authors.initials: J
authors.lastname: Wang
authors.affiliation: Department of Biology, University of Pennsylvania, Philadelphia, PA, USA.
authors.forename: Yuting
authors.initials: Y
authors.lastname: Zhao
authors.affiliation: Department of Biology, University of Pennsylvania, Philadelphia, PA, USA.
authors.forename: Wei
authors.initials: W
authors.lastname: Guo
mesh_terms: D004926:Escherichia coli; D031541:Fluorescence Resonance Energy Transfer; D000081410:Germinal Center Kinases; D006801:Humans; D011485:Protein Binding; D011487:Protein Conformation; D017346:Protein Serine-Threonine Kinases / Q000737:chemistry*; D050765:Qa-SNARE Proteins / Q000737:chemistry; D020691:rab GTP-Binding Proteins / Q000737:chemistry*
chemical_list: D000081410:Germinal Center Kinases; D050765:Qa-SNARE Proteins; C587292:syntaxin 4, human; D017346:Protein Serine-Threonine Kinases; C082377:RAB8A protein, human; D020691:rab GTP-Binding Proteins
keywords: ERK1/2; Endosomal recycling; GEF; Rab GTPases; Rab8; Rabin8