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Videos de Conceptos Relacionados

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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Enzyme Kinetics01:19

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Enzymes speed up reactions by lowering the activation energy of the reactants. The speed at which the enzyme turns reactants into products is called the rate of reaction. Several factors impact the rate of reaction, including the number of available reactants. Enzyme kinetics is the study of how an enzyme changes the rate of a reaction.
Scientists typically study enzyme kinetics with a fixed amount of enzyme in the controlled environment of a test tube. When more reactant, or substrate, is...
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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

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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.
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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.
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Ligand Binding and Linkage00:49

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Allosteric proteins have more than one ligand binding site; the binding of a ligand to any of these sites influences the binding of ligands to the other sites. When a protein is allosteric, its binding sites are called coupled or linked.  In the case of enzymes, the site that binds to the substrate is known as the active site and the other site is known as the regulatory site. When a ligand binds to the regulatory site, this leads to conformational changes in the protein that can influence...
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Identification of Kinase-substrate Pairs Using High Throughput Screening
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Un conjunto de datos de cinética orientada a la estructura de las interacciones enzima-sustrato

Sowmya Ramaswamy Krishnan1, Nishtha Pandey1, Rajgopal Srinivasan1

  • 1TCS Research (Life Sciences division), Tata Consultancy Services, Hyderabad, 500081, India.

Scientific data
|August 26, 2025
PubMed
Resumen

Este estudio presenta SKiD, un conjunto de datos que vincula los parámetros cinéticos de la enzima (kcat y Km) con las estructuras 3D. Este recurso mejora la comprensión de la función de las enzimas y ayuda en el diseño de enzimas y aplicaciones de biología sintética.

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Área de la Ciencia:

  • La bioquímica
  • Biología estructural
  • La bioinformática

Sus antecedentes:

  • Las enzimas son catalizadores biológicos cruciales que gobiernan las reacciones bioquímicas.
  • La cinética de la enzima, definida por kcat y Km, cuantifica la eficiencia y la especificidad.
  • Existe una brecha en la vinculación de los parámetros cinéticos con las estructuras tridimensionales complejas de la enzima y el sustrato.

Objetivo del estudio:

  • Para crear SKiD, un conjunto de datos que integra los parámetros cinéticos de la enzima (kcat, Km) con los datos estructurales en 3D.
  • Para cerrar la brecha entre la cinética de las enzimas y la biología estructural.
  • Para apoyar los avances en el diseño de enzimas, biología sintética e ingeniería metabólica.

Principales métodos:

  • Datos integrados de los recursos bioinformáticos existentes.
  • Utilizó programas automatizados para el procesamiento de datos y predicciones computacionales.
  • Datos erróneos resueltos manualmente y metadatos conservados como las condiciones del ensayo.
  • Se proporcionan las coordenadas 3D de los complejos enzima-sustrato con los identificadores UniProtKB.

Principales resultados:

  • Desarrolló SKiD, un conjunto de datos completo que vincula los parámetros cinéticos con las estructuras 3D.
  • Integrado y seleccionado con éxito datos cinéticos y estructurales para enzimas.
  • Se incluyen metadatos y coordenadas 3D para complejos enzima-sustrato.

Conclusiones:

  • SKiD proporciona un recurso valioso para comprender la base estructural de la función de la enzima.
  • El conjunto de datos facilita la investigación en diseño de enzimas, biología sintética e ingeniería metabólica.
  • El mapeo de la cinética a la estructura ofrece una visión más profunda de los mecanismos enzimáticos.