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Catalytically Perfect Enzymes01:07

Catalytically Perfect Enzymes

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The theory of catalytically perfect enzymes was first proposed by W.J. Albery and J. R. Knowles in 1976. These enzymes catalyze biochemical reactions at high-speed. Their catalytic efficiency values range from 108-109 M-1s-1. These enzymes are also called 'diffusion-controlled' as the only rate-limiting step in the catalysis is that of the substrate diffusion into the active site. Examples include triose phosphate isomerase, fumarase, and superoxide dismutase.
 
Most enzymes...
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Introduction to Mechanisms of Enzyme Catalysis01:13

Introduction to Mechanisms of Enzyme Catalysis

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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...
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Enzymes02:34

Enzymes

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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...
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Cofactors and Coenzymes01:24

Cofactors and Coenzymes

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Enzymes are proteins made of amino acids. The functional group of each constituent amino acid catalyzes a wide variety of chemical reactions via ionic interactions or acid-base reactions. However, amino acids cannot catalyze oxidation-reduction and group transfer reactions and need to be aided by non-protein components called cofactors. Cofactors are also referred to as the chemical teeth of an enzyme.
Cofactors can be metallic ions or organic molecules called coenzymes. These types of helper...
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Introduction to Enzymes01:22

Introduction to Enzymes

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The use of enzymes by humans dates to 7000 BCE. Humans first used enzymes to ferment sugars and produce alcohol without knowing that this was an enzyme-catalyzed reaction. Wilhelm Kuhne coined the term 'enzyme' in 1877 from the Greek words ‘en’ meaning ‘in’ or ‘within’ and ‘zyme’ meaning ‘yeast.’
Most enzymes are proteins that speed up biochemical reactions without being consumed. Enzymes contain one or more active sites that...
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Introduction to Enzyme Kinetics01:19

Introduction to Enzyme Kinetics

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Enzyme kinetics studies the rates of biochemical reactions. Scientists monitor the reaction rates for a particular enzymatic reaction at various substrate concentrations. Additional trials with inhibitors or other molecules that affect the reaction rate may also be performed.
The experimenter can then plot the initial reaction rate or velocity (Vo) of a given trial against the substrate concentration ([S]) to obtain a graph of the reaction properties. For many enzymatic reactions involving a...
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関連する実験動画

Updated: Sep 17, 2025

Immobilization of Multi-biocatalysts in Alginate Beads for Cofactor Regeneration and Improved Reusability
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バイオカタリシスのための共降酵素包装の共振有機フレームワーク

Satyadip Paul1, Mani Gupta2, Shayan Karak1

  • 1Department of Chemical Sciences, Indian Institute of Science Education and Research, Mohanpur, Kolkata 741246, India.

Journal of the American Chemical Society
|June 27, 2025
PubMed
まとめ

酵素を共性有機フレームワーク (COF) に取り込み 安定性と再利用性を高めました この方法は,厳しい条件下での酵素性能を改善し,より広範なバイオカタリシスアプリケーションを可能にします.

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Microfluidic-based Synthesis of Covalent Organic Frameworks COFs: A Tool for Continuous Production of COF Fibers and Direct Printing on a Surface
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Microfluidic-based Synthesis of Covalent Organic Frameworks COFs: A Tool for Continuous Production of COF Fibers and Direct Printing on a Surface
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科学分野:

  • 生物触媒
  • 材料科学
  • ナノテクノロジー

背景:

  • 酵素は効率的な生物触媒であるが,過酷な工業環境下では安定性が限られている.
  • 強力な酵素不動化戦略の開発は,その実用的なアプリケーションの拡大に不可欠です.
  • 協和有機フレームワーク (COF) は,調整可能な構造と高い表面積により,バイオ分子封じ込めのための有望なプラットフォームを提供します.

研究 の 目的:

  • 酵素で封じ込められたCOFの容易な水性合成を開発する.
  • カプセル化酵素とCOFマトリックスとの相互作用を調査する.
  • カプセル化酵素の安定性と再利用性を評価する.

主な方法:

  • ベータ・グルコシダース (BGL) とアルカリ・フォスファタース (ALP) を含む様々な酵素をカプセル化したTpAzo COFの1ポット水合成.
  • 固体2D NMR相関スペクトロスコーピーは,分子レベルで酵素-COFの相互作用を調査します.
  • スキャッティング型近地光学顕微鏡 (s-SNOM) とナノスケールフーリエ変換赤外線顕微鏡 (nanoFTIR) で検証する.
  • 酵素活性,デナチュレーション条件下での安定性 (SDS),および再利用性を測定する試験.

主要な成果:

  • TpAzo COF内の複数の酵素とタンパク質の封入が成功しました.
  • 酵素とCOFの骨格の間の分子相互作用の直接的な証拠で,構造的整合性を確認します.
  • 封装されたBGLとALPは高い触媒活性を維持し,10サイクルまで再利用可能であった.
  • COFの封入は,SDSの1~15%の溶液におけるBGLの安定性を著しく高め,デナチュレーションを緩和した.

結論:

  • 酵素-COF複合物に対する堅固な1ポット水性合成戦略が確立された.
  • 酵素とCOFの相互作用は,酵素の安定性と再利用性を高めるための鍵です.
  • このアプローチは 安定した再利用可能な生体触媒を 要求の高い用途に 生み出すための実用的な方法を提供します