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Videos de Conceptos Relacionados

Conserved Binding Sites01:49

Conserved Binding Sites

Many proteins’ biological role depends on their interactions with their ligands, small molecules that bind to specific locations on the protein known as ligand-binding sites. Ligand-binding sites are often conserved among homologous proteins as these sites are critical for protein function.
Binding sites are often located in large pockets, and if their location on a protein’s surface is unknown, it can be predicted using various approaches. The energetic method computationally analyses the...
Ligand Binding and Linkage00:49

Ligand Binding and Linkage

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 the...
Covalently Linked Protein Regulators02:04

Covalently Linked Protein Regulators

Proteins can undergo many types of post-translational modifications, often in response to changes in their environment. These modifications play an important role in the function and stability of these proteins. Covalently linked molecules include functional groups, such as methyl, acetyl, and phosphate groups, and also small proteins, such as ubiquitin. There are around 200 different types of covalent regulators that have been identified.
These groups modify specific amino acids in a protein.
Regulation of Nuclear Protein Sorting01:45

Regulation of Nuclear Protein Sorting

Nuclear protein sorting regulates nucleus composition and gene expression, crucial for determining the fate of a eukaryotic cell. Hence, the entry and exit of molecules across the nuclear envelope is a tightly controlled process. Nuclear protein sorting can be inhibited by one of the following ways: 1) masking cargo signal sequences, 2) modifying the nuclear receptor's affinity for cargo, 3) controlling the nuclear pore size, 4) retaining the cargo during its transit to the cytosol or the...
Covalently Linked Protein Regulators02:04

Covalently Linked Protein Regulators

Proteins can undergo many types of post-translational modifications, often in response to changes in their environment. These modifications play an important role in the function and stability of these proteins. Covalently linked molecules include functional groups, such as methyl, acetyl, and phosphate groups, and also small proteins, such as ubiquitin. There are around 200 different types of covalent regulators that have been identified.
These groups modify specific amino acids in a protein.
Bacterial Protein Maturation01:26

Bacterial Protein Maturation

Bacterial protein maturation is a tightly regulated process that ensures newly synthesized polypeptides achieve correct functional conformations. This maturation involves a series of modifications, folding events, and quality control steps, often assisted by specialized chaperone proteins.N-Terminal ModificationsThe maturation of bacterial polypeptides begins cotranslationally as the polypeptide exits the ribosome. The first amino acid, N-formylmethionine (fMet), is typically modified at the...

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Video Experimental Relacionado

Updated: Jul 14, 2026

The Importance of Correct Protein Concentration for Kinetics and Affinity Determination in Structure-function Analysis
19:16

The Importance of Correct Protein Concentration for Kinetics and Affinity Determination in Structure-function Analysis

Published on: March 17, 2010

La regulación activa de las proteínas dirigida al sitio.

B Kobe1, B E Kemp

  • 1St. Vincent's Institute of Medical Research, Fitzroy, Victoria, Australia. b.kobe@medicine.unimelb.edu.au

Nature
|December 10, 1999
PubMed
Resumen

La regulación de las proteínas es clave para el control celular. Un nuevo mecanismo emergente, la regulación intrastérica, influye directamente en los sitios activos de las proteínas, complementando el control alostérico.

Área de la Ciencia:

  • La bioquímica es la bioquímica.
  • Biología Molecular Biología Molecular
  • Regulación de las comunicaciones celulares.

Sus antecedentes:

  • La regulación de la función de las proteínas es esencial para los procesos celulares.
  • La regulación alostérica, que involucra a los efectores vinculados a sitios distintos, es un mecanismo bien establecido.
  • La regulación intrastérica está emergiendo como una vía reguladora significativa.

Objetivo del estudio:

  • Para resaltar la importancia emergente de la regulación intrastérica.
  • Para diferenciar la regulación intrástrica del control alostérico.
  • Para subrayar el papel de los mecanismos activos dirigidos al sitio en la función de las proteínas.

Principales métodos:

  • Revisión de la literatura sobre los mecanismos de regulación de las proteínas.

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  • Análisis comparativo de la regulación alostérica e intrastérica.
  • Desarrollo del marco conceptual para el control intrastérico.

    • Principales resultados:

    • La regulación intrastérica se dirige directamente al sitio activo de la proteína.
    • Este mecanismo actúa como una contraparte de la regulación alostérica.
    • La regulación intrastérica ofrece un modo distinto de controlar la actividad de las proteínas.

    Conclusiones:

    • La regulación intrastérica es un mecanismo crítico y emergente para controlar la función de las proteínas.
    • Comprender la regulación intrastérica es vital para comprender el control de los procesos celulares.
    • Una mayor investigación sobre los mecanismos intrastéricos ampliará nuestro conocimiento de la regulación molecular.