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Updated: Mar 26, 2026

Measuring G-protein-coupled Receptor Signaling via Radio-labeled GTP Binding
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Measuring G-protein-coupled Receptor Signaling via Radio-labeled GTP Binding

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脊髄NMRはβ1アドレナリゲン受容体におけるアロステリック信号伝達ネットワークを明らかにする

Shin Isogai1, Xavier Deupi2, Christian Opitz1

  • 1Focal Area Structural Biology and Biophysics, Biozentrum, University of Basel, CH-4056 Basel, Switzerland.

Nature
|February 4, 2016
PubMed
まとめ

核磁気共鳴 (NMR) は,トルコのβ-1 アドレナージック受容体 (β1AR) の詳細なダイナミクスを明らかにします. リガンド結合は,Gタンパク質結合受容体 (GPCR) 信号伝達を理解するために不可欠なサイト特有の運動を誘導する.

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β-adrenoceptors have varied sensitivities towards adrenaline, noradrenaline, and isoprenaline. The order of agonist potency is as follows:
Isoprenaline > Adrenaline > Noradrenaline
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Sympathetic signaling, a vital part of the autonomic nervous system, plays a crucial role in mobilizing the body's resources in response to stress or emergencies. It involves the transmission of nerve impulses from sympathetic preganglionic fibers to postganglionic fibers. This results in the release of specific neurotransmitters and activation of adrenergic receptors.
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α-Adrenoceptors are classified into two main subtypes: α1 and α2. The α1 adrenoceptors,...
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Heterotrimeric G proteins are guanine nucleotide-binding proteins. As the name suggests, heterotrimeric G proteins are composed of three subunits: alpha, beta, and gamma. They remain GDP-bound or GTP-bound inside the cells and switch between inactive/active states. The Gα subunit possesses the nucleotide-binding pocket that binds guanine nucleotides and switches between GDP or GTP-bound states. In contrast, the Gꞵ and Gγ subunits are always bound together with high...
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When a ligand binds to a cell-surface receptor, the receptor's intracellular domain changes shape, which may either activate its enzyme function or allow its binding to other molecules. The initial signal is amplified by most signal transduction pathways. This means that a single ligand molecule can activate multiple molecules of a downstream target. Proteins that relay a signal are most commonly phosphorylated at one or more sites, activating or inactivating the protein. Kinases catalyze...
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Interactions Between Signaling Pathways

Signaling cascades usually lack linearity. Multiple pathways interact and regulate one another, allowing cells to integrate and respond to diverse environmental stimuli.
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