酵素のATP反応活性調節のためのボロン酸付属分子接着剤
Kou Okuro1, Mizuki Sasaki1, Takuzo Aida1,2
1Department of Chemistry and Biotechnology, School of Engineering, The University of Tokyo , 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.
Journal of the American Chemical Society
|April 19, 2016
まとめ
新しいポリマーであるGumBAnは,アデノシン三酸化物 (ATP) と結合することで,酵素活性に対するATP反応変調剤として作用する. これらのポリマーはトリプシンのような酵素を無効化しますが,ATPを追加すると,低濃度で活性を再生します.
科学分野:
- ポリマー化学
- 生物化学
- 酵素工学
背景:
- 生物学的プロセスを制御するための 反応性のある材料の開発は 極めて重要です
- アデノシントリホスファート (ATP) は 細胞の重要なエネルギー分子で 多くの生物学的機能を制御します
- 酵素活性調節は,様々な生化学的応用と治療戦略において不可欠である.
研究 の 目的:
- 水溶性線形ポリマー (GumBAn) を二重機能ペンダント (グアニジニウムイオンとボロン酸) で合成し,特徴づけること.
- 酵素活性に対するATP反応変調剤としてのGumBAnポリマーを調査する.
- GumBAnとATPを用いてトリプシン (Trp) の制御された無活性化と再活性化を実証する.
主な方法:
- グアニジニウムイオン (Gu(+)) とボロン酸 (BA) の比率が異なるGumBAnポリマーの合成.
- アデノシン三酸化物 (ATP) とタンパク質とのポリマー-グアニジウムイオンとボロン酸の相互作用の特徴.
- トリプシン (Trp) を用いた酵素活性アッセイは,ATPの存在と欠如においてGumBAnによる調節を示すため,細胞条件も含む.
主要な成果:
- GumBAnポリマーは,Gu(+) とBAペンダントの両方を介してATPに効果的に結合する.
- GumBAnはハイブリッド化により トリプシン活性を無効にしました
- ATP添加により,GumBAnからトリプシンが解放され,以前報告されたよりも著しく低いATP濃度で水解活性が回復した.細胞条件下でも調節が観察された.
結論:
- GumBAnポリマーは,酵素活性に対するATP反応変調剤の新種である.
- Gu ((+) ペンダントはタンパク質の相互作用の鍵であり,酵素の調節を可能にします.
- 開発されたシステムは酵素活性に対する効率的で敏感な制御を提供し,生物学的システムと治療薬に潜在的に応用できます.
さらに関連する動画
関連する概念動画
ATP and Macromolecule Synthesis
7.2K
Biological macromolecules are organic compounds, predominantly composed of carbon atoms. The carbon atoms are covalently bonded with hydrogen, oxygen, nitrogen, and other minor elements. There are four major biological macromolecule classes: carbohydrates, lipids, proteins, and nucleic acids.
Most macromolecules are composed of single subunits, or building blocks, called monomers. The monomers combine with each other using covalent bonds to form larger molecules known as polymers.
Conversion of...
Most macromolecules are composed of single subunits, or building blocks, called monomers. The monomers combine with each other using covalent bonds to form larger molecules known as polymers.
Conversion of...
7.2K
Allosteric Proteins-ATCase
6.9K
Binding sites linkages can regulate a protein's function. For example, enzyme activity is often regulated through a feedback mechanism where the end product of the biochemical process serves as an inhibitor.
Aspartate transcarbamoylase (ATCase) is a cytosolic enzyme that catalyzes the condensation of L-aspartate and carbamoyl phosphate to N-carbamoyl-L-aspartate. This reaction is the first step in pyrimidine biosynthesis. UTP and CTP, the end products of the pyrimidine synthesis...
Aspartate transcarbamoylase (ATCase) is a cytosolic enzyme that catalyzes the condensation of L-aspartate and carbamoyl phosphate to N-carbamoyl-L-aspartate. This reaction is the first step in pyrimidine biosynthesis. UTP and CTP, the end products of the pyrimidine synthesis...
6.9K
Actin Polymerization
8.9K
Actin polymerization occurs through the head-to-tail association of binding sites on monomeric actin or G-actin to form filamentous or F-actin. The polymerization can be divided into three phases ̶ nucleation, elongation, and steady-state phase.
The nucleation phase involves forming a stable nucleus consisting of three actin monomers to form a new actin filament. Actin-binding proteins such as formins and Arp2/3 complex help filament growth post-nucleation. The Formins form straight...
The nucleation phase involves forming a stable nucleus consisting of three actin monomers to form a new actin filament. Actin-binding proteins such as formins and Arp2/3 complex help filament growth post-nucleation. The Formins form straight...
8.9K
Enzymes
96.7K
Inside living organisms, enzymes act as catalysts for many biochemical reactions involved in cellular metabolism. The role of enzymes is to reduce the activation energies of biochemical reactions by forming complexes with its substrates. The lowering of activation energies favor an increase in the rates of biochemical reactions.
Enzyme deficiencies can often translate into life-threatening diseases. For example, a genetic abnormality resulting in the deficiency of the enzyme G6PD...
Enzyme deficiencies can often translate into life-threatening diseases. For example, a genetic abnormality resulting in the deficiency of the enzyme G6PD...
96.7K
ATP Synthase: Mechanism
18.5K
In animals, the mitochondrial F1F0 ATP synthase is the key protein that synthesizes ATP molecules through a complex catalytic mechanism. While the nuclear genome encodes the majority of ATP synthase subunits, the mitochondrial genome encodes some of the enzyme's most critical components. The formation of this multi-subunit enzyme is a complex multi-step process regulated at the level of transcription, translation, and assembly. Defects in one or more of these steps can result in decreased...
18.5K
ATP Driven Pumps I: An Overview
10.4K
ATP-driven pumps, also known as transport ATPases, are integral membrane proteins. They have binding sites for ATP located on the membrane's cytosolic side and the ion-conducting domain in the transmembrane region. These pumps use the free energy released from ATP hydrolysis to move the solutes across cell membranes against an electrochemical gradient.
There are four main types of ATP-driven pumps - P-type, V-type, F-type, and ABC transporter. All these pumps are of varying complexities and...
There are four main types of ATP-driven pumps - P-type, V-type, F-type, and ABC transporter. All these pumps are of varying complexities and...
10.4K


