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Videos de Conceptos Relacionados

Viral Structure00:56

Viral Structure

Viruses are extraordinarily diverse in shape and size, but they all have several structural features in common. All viruses have a core that contains a DNA- or RNA-based genome. The core is surrounded by a protective coat of proteins called the capsid. The capsid is composed of subunits called capsomeres. The capsid and genome-containing core are together known as the nucleocapsid.
Protein Complex Assembly02:41

Protein Complex Assembly

Proteins can form homomeric complexes with another unit of the same protein or heteromeric complexes with different types.  Most protein complexes self-assemble spontaneously via ordered pathways, while some proteins need assembly factors that guide their proper assembly. Despite the crowded intracellular environment, proteins usually interact with their correct partners and form functional complexes.
Many viruses self-assemble into a fully functional unit using the infected host cell to...
Protein Complex Assembly02:41

Protein Complex Assembly

Proteins can form homomeric complexes with another unit of the same protein or heteromeric complexes with different types.  Most protein complexes self-assemble spontaneously via ordered pathways, while some proteins need assembly factors that guide their proper assembly. Despite the crowded intracellular environment, proteins usually interact with their correct partners and form functional complexes.
Many viruses self-assemble into a fully functional unit using the infected host cell to...
Inhibitors of Virion Maturation and Assembly01:19

Inhibitors of Virion Maturation and Assembly

As part of their replication cycle, certain viruses synthesize long precursor proteins called polyproteins within infected host cells. In human immunodeficiency virus (HIV), two major polyproteins are produced: Gag and Gag-Pol. The Gag polyprotein supplies the structural components of the virus, while Gag-Pol includes essential viral enzymes such as reverse transcriptase, integrase, and protease. After synthesis, these polyproteins move to the host cell membrane, where they assemble into an...
Introduction to Virus01:28

Introduction to Virus

Viruses are unique biological entities that blur the boundary between living and non-living systems. Although they lack cellular structure and metabolic processes, they can exhibit characteristics of life when infecting a host. Their defining feature is a nucleic acid core, composed of either DNA or RNA, encapsulated within a protein coat called a capsid. This simple structure allows them to invade host cells and use their machinery for replication efficiently.Viral Structure and...
Size and Structure of Viral Genomes01:26

Size and Structure of Viral Genomes

Viral genomes exhibit remarkable diversity in size, structure, and composition, influencing their replication strategies and interactions with host cells. These genomes consist of either DNA or RNA and may be linear or circular. Additionally, they can be single-stranded or double-stranded, with each configuration affecting how the virus propagates within a host. RNA viruses, for instance, generally have smaller genomes than DNA viruses, a factor that contributes to their high mutation rates and...

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Updated: Jun 25, 2026

Generation and Assembly of Virus-Specific Nucleocapsids of the Respiratory Syncytial Virus
09:08

Generation and Assembly of Virus-Specific Nucleocapsids of the Respiratory Syncytial Virus

Published on: July 27, 2021

El polimorfismo invariante en el ensamblaje de la cápside del virus.

Hung D Nguyen1, Vijay S Reddy, Charles L Brooks

  • 1Department of Chemistry and Biophysics Program, 930 North University Avenue, University of Michigan, Ann Arbor, Michigan 48109, USA.

Journal of the American Chemical Society
|February 10, 2009
PubMed
Resumen
Este resumen es generado por máquina.

Las simulaciones moleculares revelan las condiciones para el autoensamblaje de la cápside viral. Este estudio aclara cómo la temperatura y la concentración de proteínas influyen en la formación de cápsidas icosaédricas y estructuras aberrantes, ofreciendo ideas para el ensamblaje controlado.

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In Vitro Disassembly of Influenza A Virus Capsids by Gradient Centrifugation
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Área de la Ciencia:

  • La biofísica es la biofísica.
  • Ciencia de los materiales Ciencia de los materiales.
  • Biología computacional Biología computacional.

Sus antecedentes:

  • El autoensamblaje de la cápside viral es crucial para la ciencia de los materiales y la medicina.
  • La comprensión de los mecanismos de ensamblaje está limitada por los desafíos experimentales.

Objetivo del estudio:

  • Para dilucidar el autoensamblaje de proteínas virales en cápsidas icosaédricas utilizando simulaciones moleculares.
  • Para identificar las condiciones que rigen la formación de cápsidas y el polimorfismo.

Principales métodos:

  • Modelos de grano grueso geométricamente realistas.
  • Métodos especializados en dinámica molecular.
  • Simulación de la concentración de proteínas de la capa y los efectos de la temperatura.

Principales resultados:

  • Se observó el autoensamblaje espontáneo de T = 1 y T = 3 cápsidas icosaédricas.
  • Formación ubicua de cápsulas aberrantes no icosaédricas junto con productos icosaédricos.
  • El polimorfismo estructural es una propiedad inherente que surge de la cinética dependiente de la condición.

Conclusiones:

  • Conocimiento de los complejos procesos de ensamblaje de la cápside viral.
  • Identificación de los mecanismos cinéticos para la formación de cápsulas tanto icosaédricas como aberrantes.
  • Potencial para controlar el ensamblaje de cápsidas mediante la manipulación de la temperatura y la concentración de proteínas.