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関連する概念動画

Induced-fit Model01:13

Induced-fit Model

Most chemical reactions in cells require enzymes—biological catalysts that speed up the reaction without being consumed or permanently changed. They reduce the activation energy needed to convert the reactants into products. Enzymes are proteins, that usually work by binding to a substrate—a reactant molecule that they act upon.
Enzymes exhibit substrate specificity, meaning that they can only bind to certain substrates. This is mainly determined by the shape and chemical characteristics of...
Enzymes02:34

Enzymes

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...
Protein Networks02:26

Protein Networks

An organism can have thousands of different proteins, and these proteins must cooperate to ensure the health of an organism. Proteins bind to other proteins and form complexes to carry out their functions. Many proteins interact with multiple other proteins creating a complex network of protein interactions.
These interactions can be represented through maps depicting protein-protein interaction networks, represented as nodes and edges. Nodes are circles that are representative of a protein,...
Introduction to Mechanisms of Enzyme Catalysis01:13

Introduction to Mechanisms of Enzyme Catalysis

For many years, scientists thought that enzyme-substrate binding took place in a simple "lock-and-key" fashion. This model stated that the enzyme and substrate fit together perfectly in one instantaneous step. However, current research supports a more refined view scientists call induced fit. The induced-fit model expands upon the lock-and-key model by describing a more dynamic interaction between enzyme and substrate. As the enzyme and substrate come together, their interaction causes a mild...
Protein Organization01:24

Protein Organization

Proteins are polymers of amino acid residues. They are versatile and responsible for different cellular functions, including DNA replication, molecular transport, catalysis, and structural support. Proteins have a hierarchical structure comprising at least three levels of organization: primary, secondary, and tertiary structure. Some large proteins have a quaternary structure where individual protein subunits are linked together.
The primary structure of a protein is its amino acid sequence.
Transducer Mechanism: Enzyme-Linked Receptors01:27

Transducer Mechanism: Enzyme-Linked Receptors

Enzyme-linked receptors are cell-surface receptors acting as an enzyme or associating with an enzyme intracellularly. They make excellent drug targets. Drugs can bind to the extracellular ligand-binding domain or directly affect their enzymatic domain and alter their activity.
Major types that are helpful drug targets include:

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関連する実験動画

Updated: Jul 8, 2026

A Protocol for Computer-Based Protein Structure and Function Prediction
16:41

A Protocol for Computer-Based Protein Structure and Function Prediction

Published on: November 3, 2011

高エネルギーの中間物質を酵素構造にドッキングすることによって基板を予測する.

Johannes C Hermann1, Eman Ghanem, Yingchun Li

  • 1Department of Pharmaceutical Chemistry, University of California, San Francisco, MC 2550, San Francisco, California 94158-2330, USA.

Journal of the American Chemical Society
|December 7, 2006
PubMed
まとめ

酵素活性を予測することは極めて重要です. この研究は,高エネルギー中間物質のドッキングが,酵素基板とステレオ選択性を正確に予測し,標準的な方法を上回ることを示しています.

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Analyzing Dynamic Protein Complexes Assembled On and Released From Biolayer Interferometry Biosensor Using Mass Spectrometry and Electron Microscopy
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Analyzing Dynamic Protein Complexes Assembled On and Released From Biolayer Interferometry Biosensor Using Mass Spectrometry and Electron Microscopy

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Computational Prediction of Amino Acid Preferences of Potentially Multispecific Peptide-Binding Domains Involved in Protein-Protein Interactions
06:50

Computational Prediction of Amino Acid Preferences of Potentially Multispecific Peptide-Binding Domains Involved in Protein-Protein Interactions

Published on: January 26, 2024

関連する実験動画

Last Updated: Jul 8, 2026

A Protocol for Computer-Based Protein Structure and Function Prediction
16:41

A Protocol for Computer-Based Protein Structure and Function Prediction

Published on: November 3, 2011

Analyzing Dynamic Protein Complexes Assembled On and Released From Biolayer Interferometry Biosensor Using Mass Spectrometry and Electron Microscopy
09:30

Analyzing Dynamic Protein Complexes Assembled On and Released From Biolayer Interferometry Biosensor Using Mass Spectrometry and Electron Microscopy

Published on: August 6, 2018

Computational Prediction of Amino Acid Preferences of Potentially Multispecific Peptide-Binding Domains Involved in Protein-Protein Interactions
06:50

Computational Prediction of Amino Acid Preferences of Potentially Multispecific Peptide-Binding Domains Involved in Protein-Protein Interactions

Published on: January 26, 2024

科学分野:

  • バイオケミストリー バイオケミストリー
  • 構造生物学 構造生物学とは
  • コンピューティング・ケミストリー

背景:

  • タンパク質構造から酵素機能を決定することは,ますます大きな課題となっています.
  • 酵素活性の構造に基づく予測には,精密な基質の識別が必要です.

研究 の 目的:

  • 構造ベースのドッキングを使用して酵素基板と活性を予測する方法を開発し,検証する.
  • 基板の高エネルギー中間形態を基底状態形態と比較してドッキングの有効性を評価する.

主な方法:

  • KEGGの代謝産物から高エネルギー移行状態のアナログのデータベースを作成しました.
  • 基底状態と高エネルギー中間形態の両方で,アミドヒドローラゼ酵素にドッキングされた代謝産物.
  • キラル基板を用いたフォスフォトトリエステラゼのエナンチオセレクティビティの予測をテストした.

主要な成果:

  • 高エネルギーの中間物質をドッキングすることで,基板の差別が基底状態のドッキングよりも大幅に改善されました.
  • この方法は,基質/酵素の組み合わせ20種のうち18種においてステレオ選択性を正しく予測した.
  • ステレオ選択性比率とスイッチの有意な差異が観察され,正確に予測されました.

結論:

  • 高エネルギー中間物質をドッキングすることは,酵素基板と活性を予測するための堅実な方法です.
  • このアプローチは,構造に基づく酵素機能予測の精度を高めます.
  • この方法は,より広い範囲の酵素に適用できる可能性を有望に示しています.