Staphylococcus aureusにおける抗生物質感知ヒスティジンキナーゼであるNsaSのトランスメブラン領域の構造と機能
Manasi P Bhate1, Thomas Lemmin1, Georg Kuenze2
1Department of Pharmaceutical Chemistry , UC San Francisco , San Francisco , California 94158 , United States.
Journal of the American Chemical Society
|May 18, 2018
まとめ
この研究は,Staphylococcus aureusの重要なヒスティジンキナーゼであるNsaSの構造を明らかにし,そのトランスメブラン領域と柔軟なリンク器を強調しています. これらの特徴は 感染時に抗菌剤と先天的な免疫を感知するのに 極めて重要です
科学分野:
- 微生物学
- 構造生物学
- 生物化学
背景:
- Staphylococcus aureusは4つの膜内ヒスティジンキナーゼ (HKs) を使用して,膜活性抗菌剤と宿主の先天的免疫に反応する.
- NsaSはこれらの重要な病原体防御機構に関与する重要なHKです.
研究 の 目的:
- NsaSの最初の統合的構造モデルを解明する.
- 抗生物質と免疫反応における NsaS 機能の構造的基礎を理解する.
主な方法:
- 溶液状態の核磁気共振 (NMR) スペクトロスコーピー
- 分子モデリングとダイナミクスシミュレーションと組み合わせた化学クロスリンク.
- 化学的シフト,異核 NOE,H/D交換測定の分析
主要な成果:
- NsaSは短いN端のアンフィフィリックヘリックスを持ち,そのトランスメブラン (TM) バンドルを内膜のフラフレットに固定します.
- TMドメインは,膜インターフェイスで構造的変形を持つダイナミック4ヘリックスバンドルを形成します.
- 限界的に安定した螺旋型ダイマーリンクは,TMドメインを細胞質の触媒領域に接続し,潜在的に異なる形状を採用します.
結論:
- TMバンドルとダイナミックリンクヤーを含むNsaSの構造特性は,膜の乱れを感知し,シグナル伝達経路を開始するために重要です.
- これらの発見は,Staphylococcus aureusの耐性メカニズムと潜在的な治療標的についての洞察を提供します.
関連する概念動画
Protein Kinases and Phosphatases
15.2K
Proteins undergo chemical modifications that trigger changes in the charge, structure, and conformation of the proteins. Phosphorylation, acetylation, glycosylation, nitrosylation, ubiquitination, lipidation, methylation, and proteolysis are various protein modifications that regulate protein activity. Such modifications are usually enzyme-driven.
Protein kinases
Many proteins in the cell are regulated by phosphorylation, the addition of a phosphate group. A family of enzymes called kinases...
Protein kinases
Many proteins in the cell are regulated by phosphorylation, the addition of a phosphate group. A family of enzymes called kinases...
15.2K
Structural Protein Function
30.0K
Structural proteins are a category of proteins responsible for functions ranging from cell shape and movement to providing support to major structures such as bones, cartilage, hair, and muscles. This group includes proteins such as collagen, actin, myosin, and keratin.
Collagen, the most abundant protein in mammals, is found throughout the body. In connective tissue, such as skin, ligaments, and tendons, it provides tensile strength and elasticity. In bones and teeth, it mineralizes to...
Collagen, the most abundant protein in mammals, is found throughout the body. In connective tissue, such as skin, ligaments, and tendons, it provides tensile strength and elasticity. In bones and teeth, it mineralizes to...
30.0K
Structural Protein Function
3.3K
3.3K
Conservation of Protein Domains Over Different Proteins
14.6K
Protein domains are small structurally independent units that are part of a single amino acid chain. Although these domains are often structurally independent, they may rely on synergistic effects to perform their functions as part of a larger protein. Protein domains may be conserved within the same organism, as well as across different organisms.
A limited set of protein domains often duplicate and recombine during evolution. These domains can be organized in different combinations to...
A limited set of protein domains often duplicate and recombine during evolution. These domains can be organized in different combinations to...
14.6K
Fruit Development, Structure, and Function
25.4K
Fruits form from a mature flower ovary. As seeds develop from the ovules contained within, the ovary wall undergoes a series of complex changes to form fruit. In some fruits, such as soybeans, the ovary wall dries; in other fruits, such as grapes, it remains fleshy. In some cases, organs other than the ovary contribute to fruit formation; such fruits are called accessory fruits.
25.4K
Antibiotic Selection
60.1K
Overview
60.1K


