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Videos de Conceptos Relacionados

Conservation of Protein Domains Over Different Proteins02:26

Conservation of Protein Domains Over Different Proteins

Protein domains are small structurally independent units that are part of a single amino acid chain.  Although these domains are often structurally independent, they may rely on synergistic effects to perform their functions as part of a larger protein. Protein domains may be conserved within the same organism, as well as across different organisms.
A limited set of protein domains often duplicate and recombine during evolution. These domains can be organized in different combinations to form...
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...
Protein Complexes with Interchangeable Parts01:57

Protein Complexes with Interchangeable Parts

Groups of proteins may form a complex where each protein in this complex has a different role in the overall execution of the complex’s function. Often some of the proteins in the complex can be replaced by a closely related variant to give a complex that contains many of the same components yet is functionally distinct.
The SCF ubiquitin ligase is a protein complex of five individual proteins. This complex attaches ubiquitin to other target proteins to mark them for degradation. In order to...
Membrane Domains01:18

Membrane Domains

The membrane domains concentrate specific lipids and proteins at one place within the membrane, which helps in cell signaling, adhesion, and other critical cellular processes. These domains can differ in size, composition, function, and lifespan.
Protein Domains
The membrane comprises a group of distinct proteins responsible for carrying out a cell's specific function. For example, the plasma membrane of the human sperm, or a single germ cell, contains a unique set of proteins in the anterior...
Protein Complexes with Interchangeable Parts01:57

Protein Complexes with Interchangeable Parts

Groups of proteins may form a complex where each protein in this complex has a different role in the overall execution of the complex’s function. Often some of the proteins in the complex can be replaced by a closely related variant to give a complex that contains many of the same components yet is functionally distinct.
The SCF ubiquitin ligase is a protein complex of five individual proteins. This complex attaches ubiquitin to other target proteins to mark them for degradation. In order to...
Mechanisms of Membrane Domain Formation00:59

Mechanisms of Membrane Domain Formation

Different physical properties of lipids and proteins allow them to localize and form distinct islands or domains in the membrane. Some membrane domains are formed due to protein-protein interactions, whereas others are formed due to the presence of specific lipids such as sphingolipids and sterols—for example, large proteins, such as bacteriorhodopsin, aggregate and create distinct domains.
Another mechanism for membrane domain formation involves membrane proteins interacting with cytoskeletal...

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91st annual meeting of the American Association for Cancer Research.

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Video Experimental Relacionado

Updated: Jun 4, 2026

Lipid Vesicle-mediated Affinity Chromatography using Magnetic Activated Cell Sorting (LIMACS): a Novel Method to Analyze Protein-lipid Interaction
07:33

Lipid Vesicle-mediated Affinity Chromatography using Magnetic Activated Cell Sorting (LIMACS): a Novel Method to Analyze Protein-lipid Interaction

Published on: April 26, 2011

El dominio LIM es una interfaz modular de unión a proteínas.

K L Schmeichel1, M C Beckerle

  • 1Biology Department, University of Utah, Salt Lake City 84112.

Cell
|October 21, 1994
PubMed
Resumen

Los dominios LIM son secuencias esenciales de proteínas de unión al zinc. Los estudios muestran que un dominio LIM específico en la proteína zyxin es crucial para la unión con su socio, la proteína rica en cisteína (CRP), revelando su papel en las interacciones proteicas.

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Last Updated: Jun 4, 2026

Lipid Vesicle-mediated Affinity Chromatography using Magnetic Activated Cell Sorting (LIMACS): a Novel Method to Analyze Protein-lipid Interaction
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Área de la Ciencia:

  • Biología Molecular Biología Molecular
  • Biología celular Biología celular.
  • La bioquímica es la bioquímica.

Sus antecedentes:

  • Los dominios LIM son motivos conservados de unión al zinc presentes en varias proteínas.
  • Estas proteínas incluyen reguladores de la transcripción, proto-oncogenes y componentes de las placas de adhesión.
  • Zyxin es una proteína de placa de adhesión caracterizada por tres dominios LIM C-terminales.

Objetivo del estudio:

  • Para definir la actividad biológica y la función de los dominios LIM.
  • Para investigar el papel de los dominios LIM en las interacciones proteína-proteína utilizando la xixina como modelo.
  • Para identificar los dominios LIM específicos responsables de las interacciones de la zyxin con los socios de unión.

Principales métodos:

  • Reconstitución de complejos proteicos que involucran a la zixina y sus socios de unión, la alfa-actinina y la proteína rica en cisteína (CRP).
  • Análisis de las interacciones proteína-proteína mediadas por los dominios LIM de la xixina.
  • Ensayos funcionales para determinar la necesidad y la suficiencia de los dominios LIM individuales para el enlace.

Principales resultados:

  • Uno de los tres dominios LIM C-terminales de la xixina es esencial para su asociación con la PCR.
  • Este dominio LIM específico es necesario y suficiente para mediar la interacción zyxin-CRP.
  • El estudio proporciona evidencia directa de que el dominio LIM actúa como una interfaz de unión a las proteínas.

Conclusiones:

  • Los dominios LIM funcionan como interfaces específicas de unión a las proteínas.
  • Los hallazgos aclaran el mecanismo molecular por el cual la zyxin interactúa con la CRP.
  • Esta investigación contribuye a comprender el papel más amplio de los dominios LIM en los procesos celulares y la formación de complejos proteicos.