Video Experimental Relacionado
Updated: Jan 8, 2026
13:00
Engineering Antiviral Agents via Surface Plasmon Resonance
Published on: June 14, 2022
2.7K
Visualización de la complementariedad electrostática interfacial revela cambios evolutivos en las interacciones
Yosuke Muroya1, Hiroki Ozono1, Takeshi Ishikawa1
1Department of Chemistry, Biotechnology, and Chemical Engineering, Graduate School of Science and Engineering, Kagoshima University, 1-21-40 Korimoto, Kagoshima, Kagoshima 890-0065, Japan. ishi@cb.kagoshima-u.ac.jp.
Physical chemistry chemical physics : PCCP
|December 15, 2025
Resumen
Comprender las mutaciones en el dominio de unión al receptor (RBD) de la proteína espiga del SARS-CoV-2 es clave. Un nuevo método, VIINEC, visualiza los cambios electrostáticos en las interacciones RBD-hACE2, revelando mecanismos adaptativos en la proteína ACE2 humana durante la evolución viral.
Área de la Ciencia:
- Virología
- Biología Estructural
- Bioquímica
Sus antecedentes:
- El dominio de unión al receptor (RBD) de la proteína espiga del SARS-CoV-2 interactúa con la enzima convertidora de angiotensina 2 humana (hACE2), un paso crítico en la infección viral.
- Las mutaciones de aminoácidos dentro del RBD impulsan la evolución viral y pueden alterar esta interacción proteína-proteína (PPI) crucial.
Objetivo del estudio:
- Analizar de manera integral el impacto de las mutaciones de aminoácidos en el RBD del SARS-CoV-2 en la interacción proteína-proteína (PPI) RBD-hACE2.
- Investigar los cambios adaptativos en la complementariedad electrostática en la interfaz RBD-hACE2 durante la evolución viral.
Principales métodos:
- Se utilizó un método novedoso de análisis de PPI, visualización de la complementariedad electrostática interfacial (VIINEC).
- Se aplicó VIINEC para estudiar complejos RBD-hACE2 en 15 variantes del SARS-CoV-2.
- Se visualizó y analizó el potencial electrostático (ESP) en la interfaz proteína-proteína.
Principales resultados:
- Se observaron alteraciones significativas en el potencial electrostático (ESP) de los RBD en diferentes variantes del SARS-CoV-2.
- Se demostró que el ESP de la proteína hACE2 cambió significativamente en respuesta a las mutaciones del RBD, a pesar de no tener mutaciones propias.
- Se encontró que hACE2 mantuvo una alta complementariedad electrostática con los RBD en evolución.
- Se atribuyeron los cambios adaptativos del ESP en hACE2 a cambios conformacionales en cuatro residuos cargados.
Conclusiones:
- VIINEC proporciona un método intuitivo para comprender cómo las mutaciones afectan las PPI al visualizar la complementariedad electrostática.
- Las variantes del SARS-CoV-2 exhiben cambios adaptativos en la interfaz RBD-hACE2, y hACE2 ajusta dinámicamente su perfil electrostático.
- Estos hallazgos resaltan la compleja dinámica coevolutiva entre el virus y su receptor huésped.
Palabras clave:
SARS-CoV-2RBDhACE2mutacionesevolución viralcomplementariedad electrostáticaproteína espigaVIINECinteracción proteína-proteínapotencial electrostáticoMás Videos Relacionados
Videos de Conceptos Relacionados
02:04Protein-Protein Interfaces
4.4K
4.4K
02:04Protein-protein Interfaces
14.4K
Many proteins form complexes to carry out their functions, making protein-protein interactions (PPIs) essential for an organism's survival. Most PPIs are stabilized by numerous weak noncovalent chemical forces. The physical shape of the interfaces determines the way two proteins interact. Many globular proteins have closely-matching shapes on their surfaces, which form a large number of weak bonds. Additionally, many PPIs occur between two helices or between a surface cleft and a...
14.4K
02:35Noncovalent Attractions in Biomolecules
63.0K
Noncovalent attractions are associations within and between molecules that influence the shape and structural stability of complexes. These interactions differ from covalent bonding in that they do not involve sharing of electrons.
Four types of noncovalent interactions are hydrogen bonds, van der Waals forces, ionic bonds, and hydrophobic interactions.
Hydrogen bonding results from the electrostatic attraction of a hydrogen atom covalently bonded to a strong-electronegative atom like oxygen,...
Four types of noncovalent interactions are hydrogen bonds, van der Waals forces, ionic bonds, and hydrophobic interactions.
Hydrogen bonding results from the electrostatic attraction of a hydrogen atom covalently bonded to a strong-electronegative atom like oxygen,...
63.0K
02:35Noncovalent Attractions in Biomolecules
19.2K
19.2K
02:50Conjugated Proteins
27.2K
Simple proteins and protein complexes contain only amino acids. In contrast, many other proteins, called conjugated proteins, covalently bond with non-protein moieties.
Nucleoproteins are protein complexes that contain nucleic acids, categorized as deoxyribonucleoproteins (DNPs) or ribonucleoproteins (RNPs) respectively. The nucleosome is a typical example of a DNP where nuclear DNA is associated with histone proteins. The major antigen for the Covid-19 virus SARS-CoV is an RNP that is critical...
Nucleoproteins are protein complexes that contain nucleic acids, categorized as deoxyribonucleoproteins (DNPs) or ribonucleoproteins (RNPs) respectively. The nucleosome is a typical example of a DNP where nuclear DNA is associated with histone proteins. The major antigen for the Covid-19 virus SARS-CoV is an RNP that is critical...
27.2K
01:49Conserved Binding Sites
5.0K
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...
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...
5.0K