erythrocyte apoptotic process / maintenance of postsynaptic density structure / Intra-Golgi traffic / protein localization to cleavage furrow / positive regulation of mitotic cytokinetic process / negative regulation of dendrite development / Golgi vesicle transport / establishment of epithelial cell polarity / regulation of dendritic spine development / regulation of Rac protein signal transduction ...erythrocyte apoptotic process / maintenance of postsynaptic density structure / Intra-Golgi traffic / protein localization to cleavage furrow / positive regulation of mitotic cytokinetic process / negative regulation of dendrite development / Golgi vesicle transport / establishment of epithelial cell polarity / regulation of dendritic spine development / regulation of Rac protein signal transduction / protein localization to endosome / negative regulation of protein localization to cell surface / negative regulation of receptor-mediated endocytosis / ruffle assembly / positive regulation of keratinocyte migration / positive regulation of focal adhesion disassembly / regulation of filopodium assembly / regulation of ARF protein signal transduction / endocytic recycling / MET receptor recycling / thioesterase binding / Flemming body / filopodium membrane / protein localization to cell surface / TBC/RABGAPs / cortical actin cytoskeleton organization / positive regulation of actin filament polymerization / hepatocyte apoptotic process / phosphatidylinositol-3,4,5-trisphosphate binding / cleavage furrow / synaptic vesicle endocytosis / endocytic vesicle / regulation of presynapse assembly / bicellular tight junction / vesicle-mediated transport / ruffle / signaling adaptor activity / positive regulation of cell adhesion / guanyl-nucleotide exchange factor activity / liver development / small monomeric GTPase / protein localization to plasma membrane / positive regulation of protein secretion / adherens junction / positive regulation of protein localization to plasma membrane / intracellular protein transport / cellular response to nerve growth factor stimulus / positive regulation of neuron projection development / recycling endosome membrane / GDP binding / nervous system development / presynapse / Clathrin-mediated endocytosis / G protein activity / midbody / cell cortex / early endosome membrane / cell differentiation / postsynapse / endosome / cell adhesion / cell division / focal adhesion / GTPase activity / GTP binding / glutamatergic synapse / Golgi apparatus / extracellular exosome / nucleoplasm / membrane / plasma membrane / cytosol / cytoplasm 類似検索 - 分子機能
ADP-ribosylation factor 6 / Sec7 domain / Sec7, C-terminal domain superfamily / Sec7 domain superfamily / Sec7 domain / SEC7 domain profile. / Sec7 domain / Small GTPase superfamily, ARF type / Small GTPase Arf domain profile. / Sar1p-like members of the Ras-family of small GTPases ...ADP-ribosylation factor 6 / Sec7 domain / Sec7, C-terminal domain superfamily / Sec7 domain superfamily / Sec7 domain / SEC7 domain profile. / Sec7 domain / Small GTPase superfamily, ARF type / Small GTPase Arf domain profile. / Sar1p-like members of the Ras-family of small GTPases / Small GTPase superfamily, ARF/SAR type / ADP-ribosylation factor family / ARF-like small GTPases; ARF, ADP-ribosylation factor / PH domain / PH domain profile. / Pleckstrin homology domain. / Pleckstrin homology domain / Rab subfamily of small GTPases / Small GTP-binding protein domain / PH-like domain superfamily / P-loop containing nucleoside triphosphate hydrolase 類似検索 - ドメイン・相同性
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
GM 056324
米国
引用
ジャーナル: Structure / 年: 2018 タイトル: Structural Dynamics Control Allosteric Activation of Cytohesin Family Arf GTPase Exchange Factors. 著者: Andrew W Malaby / Sanchaita Das / Srinivas Chakravarthy / Thomas C Irving / Osman Bilsel / David G Lambright / 要旨: Membrane dynamic processes including vesicle biogenesis depend on Arf guanosine triphosphatase (GTPase) activation by guanine nucleotide exchange factors (GEFs) containing a catalytic Sec7 domain and ...Membrane dynamic processes including vesicle biogenesis depend on Arf guanosine triphosphatase (GTPase) activation by guanine nucleotide exchange factors (GEFs) containing a catalytic Sec7 domain and a membrane-targeting module such as a pleckstrin homology (PH) domain. The catalytic output of cytohesin family Arf GEFs is controlled by autoinhibitory interactions that impede accessibility of the exchange site in the Sec7 domain. These restraints can be relieved through activator Arf-GTP binding to an allosteric site comprising the PH domain and proximal autoinhibitory elements (Sec7-PH linker and C-terminal helix). Small-angle X-ray scattering and negative-stain electron microscopy were used to investigate the structural organization and conformational dynamics of cytohesin-3 (Grp1) in autoinhibited and active states. The results support a model in which hinge dynamics in the autoinhibited state expose the activator site for Arf-GTP binding, while subsequent C-terminal helix unlatching and repositioning unleash conformational entropy in the Sec7-PH linker to drive exposure of the exchange site.