Results 211 to 220 of about 3,592,863 (264)
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Current Opinion in Cell Biology, 1996
Over the past year, the thrust of work in the field of heterotrimeric G proteins has been primarily in the following areas: first, resolution of their three-dimensional structures by X-ray crystallography; second, elucidation of the effect of lipid modifications on the Galpha and Ggamma subunits; third, understanding the role of the Gbetagamma dimer in
H E, Hamm, A, Gilchrist
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Over the past year, the thrust of work in the field of heterotrimeric G proteins has been primarily in the following areas: first, resolution of their three-dimensional structures by X-ray crystallography; second, elucidation of the effect of lipid modifications on the Galpha and Ggamma subunits; third, understanding the role of the Gbetagamma dimer in
H E, Hamm, A, Gilchrist
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Science, 2002
The heterotrimeric guanine nucleotide–binding proteins (G proteins) are signal transducers that communicate signals from many hormones, neurotransmitters, chemokines, and autocrine and paracrine factors. The extracellular signals are received by members of a large superfamily of receptors with seven membrane-spanning regions that activate the G ...
Susana R, Neves +2 more
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The heterotrimeric guanine nucleotide–binding proteins (G proteins) are signal transducers that communicate signals from many hormones, neurotransmitters, chemokines, and autocrine and paracrine factors. The extracellular signals are received by members of a large superfamily of receptors with seven membrane-spanning regions that activate the G ...
Susana R, Neves +2 more
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G Protein-Coupled Receptors and G Proteins
1997G protein-coupled receptors (GPCRs) belong to a large class of membrane-spanning receptors. GPCRs function as antennae for external signals consisting of chemical ligands or photons (in the case of opsins). Once the external signal is received, it is transduced to a cytosolic G protein. Subsequently, the G protein itself becomes activated.
Paul H. J. Nederkoorn +2 more
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G Protein-Coupled Receptors and G Proteins
2000G protein-coupled receptors (GPCRs) form a large and functionally diverse superfamily of cell membrane receptors. Many signaling cascades use GPCRs to convert a large diversity of external and internal stimuli including photons, odorants, and ions as well as hormones and neurotransmitter agonists into intracellular responses.
Alfredo Ulloa-Aguirre, P. Michael Conn
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Heterotrimeric G protein activation by G-protein-coupled receptors
Nature Reviews Molecular Cell Biology, 2008Heterotrimeric G proteins have a crucial role as molecular switches in signal transduction pathways mediated by G-protein-coupled receptors. Extracellular stimuli activate these receptors, which then catalyse GTP-GDP exchange on the G protein alpha-subunit.
William M, Oldham, Heidi E, Hamm
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G Proteins and G Protein-Coupled Receptors
2002Cells live in a constantly changing milieu. The structure and biochemical nature of this environment is dynamic and in order for normal cellular function to proceed in a manner appropriate for the benefit of the organism, cells must be able to access this changing information.
Michael A. Shetzline, Marc G. Caron
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Nature Reviews Molecular Cell Biology, 2005
The focus of developmental biologists has expanded from the analysis of gene expression to include the analysis of cell signalling. Heterotrimeric G proteins (G proteins) mediate signalling from a superfamily of heptahelical receptors (G-protein-coupled receptors) to a smaller number of effector units that include adenylyl cyclases, phospholipase C and
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The focus of developmental biologists has expanded from the analysis of gene expression to include the analysis of cell signalling. Heterotrimeric G proteins (G proteins) mediate signalling from a superfamily of heptahelical receptors (G-protein-coupled receptors) to a smaller number of effector units that include adenylyl cyclases, phospholipase C and
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G-protein-independent signaling by G-protein-coupled receptors
Trends in Neurosciences, 2000Two classes of receptors transduce neurotransmitter signals: ionotropic receptors and heptahelical metabotropic receptors. Whereas the ionotropic receptors are structurally associated with a membrane channel, a mediating mechanism is necessary to functionally link metabotropic receptors with their respective effectors.
Heuss, C, Gerber, U
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G-Protein Subunit Dissociation Is not an Integral Part of G-Protein Action
ChemBioChem, 2002AbstractFor Abstract see ChemInform Abstract in Full Text.
Alexander, Levitzki, Shoshana, Klein
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G-Proteins and Endothelial Responses
Blood Vessels, 2008G-proteins are transducing proteins that couple a large number of membrane-bound receptors to a variety of intracellular effector systems. Pertussis toxin ADP-ribosylates certain G-proteins causing inhibition of their function. In porcine coronary arteries, pertussis toxin inhibited the endothelium-dependent relaxations evoked by alpha-2-adrenergic or ...
Flavahan, NA, Vanhoutte, PM
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