フェニルエタノアミンN-メチルトランスフェラーゼの移行状態アナログ
Niusha Mahmoodi1, Rajesh K Harijan1, Vern L Schramm1
1Department of Biochemistry, Albert Einstein College of Medicine, New York, New York 10461, United States.
Journal of the American Chemical Society
|July 25, 2020
まとめ
フェニレタノアミンNメチルトランスフェラーゼ (PNMT) 阻害剤は,その移行状態を模倣するように設計された. 新しい阻害剤はナノモラー afinityを示し,PNMTに関連する状態のための新しい治療の可能性を提供します.
科学分野:
- 生物化学
- 酵素学
- 薬理学について
背景:
- フェニレタノアミンN-メチルトランスフェラーゼ (PNMT) は,エピネフリンを生成するカテキオアミン合成に不可欠です.
- エピネフリンは血圧,呼吸,神経変性,アルツハイマー病などに作用します.
- PNMTのメチル転送反応は,速度を制限するSN2移行状態を経由する.
研究 の 目的:
- 人間のPNMT (hPNMT) のための新しい移行状態 (TS) アナログ阻害剤の設計と合成.
- これらの阻害剤の結合 afinity とメカニズムを特徴づける.
- 強力な酵素阻害剤としての TS アナログの可能性を調査する.
主な方法:
- hPNMT TSの幾何学と電子特性を模倣した分子設計.
- 設計されたTSアナログ阻害剤の化学合成
- Kiの決定を含む運動特性.
- 結合分析のためのアイソテルミック・タイトレーション・カロリメトリー (ITC)
- hPNMT複合体の構造分析
主要な成果:
- 新しい抑制装置が 合成されました
- 鉛阻害剤 (化合物3) は,Ki 12. 0 nMの緊密結合親和性を示した.
- これは,メチルトランスフェラーゼ TS アナログ阻害剤に対するナノモラー afinity を表しています.
- ITCはエントロピーによる負の協同結合を明らかにした.
- 構造データは,阻害剤3がコファクター (SAM) と基質 (ノレピネフリン) の結合部位の両方を占めていることを示した.
結論:
- トランジション状態のアナログデザインは強力なhPNMT阻害剤を生成しました.
- 阻害剤のナノモラー親和性と結合モードは 新しい有望な治療戦略を提供する.
- この研究は,メチルトランスフェラーゼ酵素の特定の阻害剤の開発を進めています.
関連する概念動画
Adrenergic Agonists: Indirect-Acting Agents
2.4K
Indirect-acting adrenergic agonists potentiate the effects of endogenous catecholamines through different mechanisms without directly binding to adrenoceptors.
One mechanism involves depleting stored catecholamines by displacing them from synaptic vesicles. These agents, known as "displacers," are transported into vesicles at the expense of noradrenaline. Examples include amphetamine and tyramine, which lack a catechol moiety, resulting in prolonged action, improved oral...
One mechanism involves depleting stored catecholamines by displacing them from synaptic vesicles. These agents, known as "displacers," are transported into vesicles at the expense of noradrenaline. Examples include amphetamine and tyramine, which lack a catechol moiety, resulting in prolonged action, improved oral...
2.4K
Adrenergic Agonists: Chemistry and Structure-Activity Relationship
3.7K
Adrenergic agonists' structure-activity relationship (SAR) determines their selectivity and efficacy. These agonists comprise a phenylethylamine moiety with an aromatic ring and an ethylamine side chain.
Aromatic ring substitutions: Substituting the aromatic ring with –OH groups at positions 3 and 4 yields catecholamines (e.g., epinephrine), which have a high affinity for adrenoceptors. Hydrogen bonding between –OH groups and receptors enhances adrenergic activity.
Separation of...
Aromatic ring substitutions: Substituting the aromatic ring with –OH groups at positions 3 and 4 yields catecholamines (e.g., epinephrine), which have a high affinity for adrenoceptors. Hydrogen bonding between –OH groups and receptors enhances adrenergic activity.
Separation of...
3.7K
Indirect-Acting Cholinergic Agonists: Chemistry and Structure-Activity Relationship
810
Indirect-acting cholinergic agonists are agents that interact with the acetylcholinesterase enzyme in the synaptic cleft, preventing the breakdown of acetylcholine into choline and acetate. Consequently, the concentration of acetylcholine in the synaptic cleft increases. These agonists can be classified into reversible and irreversible inhibitors based on their duration of action.
Reversible inhibitors display short to medium durations of action. Short-acting agents include simple alcohols with...
Reversible inhibitors display short to medium durations of action. Short-acting agents include simple alcohols with...
810
Indirect-Acting Cholinergic Agonists: Mechanism of Action
2.4K
Indirect-acting cholinergic agonists work by interacting with an enzyme called acetylcholinesterase (AChE) in the synaptic cleft. They can be reversible or irreversible inhibitors and have different effects on the enzyme.
Reversible inhibitors like edrophonium bind to a specific part of the enzyme called the anionic catalytic site. They form noncovalent bonds, which means they are not strongly attached to the enzyme. This creates a temporary and less stable enzyme–inhibitor complex,...
Reversible inhibitors like edrophonium bind to a specific part of the enzyme called the anionic catalytic site. They form noncovalent bonds, which means they are not strongly attached to the enzyme. This creates a temporary and less stable enzyme–inhibitor complex,...
2.4K
Drugs Affecting Neurotransmitter Synthesis
2.0K
Drugs affecting neurotransmitter synthesis can impact the adrenergic neuron and the synthesis of neurotransmitters. For example, α-methyltyrosine and carbidopa target specific enzymes involved in catecholamine synthesis. α-methyltyrosine inhibits the enzyme tyrosine hydroxylase, which converts tyrosine into dopamine. By blocking this enzyme, α-methyltyrosine reduces dopamine production and other catecholamines. Carbidopa, on the other hand, inhibits the enzyme dopa decarboxylase,...
2.0K
Direct-Acting Cholinergic Agonists: Chemistry and Structure-Activity Relationship
1.8K
Cholinergic agonists or cholinomimetics mimic the action of acetylcholine to stimulate the parasympathetic nervous system. They are categorized into direct-acting and indirect-acting agents. The direct-acting cholinergic drugs induce the parasympathetic response by directly binding to the muscarinic or nicotine receptors. In comparison, the indirect-acting cholinergic drugs prevent acetylcholine hydrolysis, indirectly contributing to the extended parasympathetic response.
The direct-acting...
The direct-acting...
1.8K


