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Measuring Interactions of Globular and Filamentous Proteins by Nuclear Magnetic Resonance Spectroscopy (NMR) and Microscale Thermophoresis (MST)
Published on: November 2, 2018
RMN J-GFT para la medición precisa de acoplamientos nucleares de espín-espín mutuamente correlacionados
Hanudatta S Atreya1, Erwin Garcia, Yang Shen
1Northeast Structural Genomics Consortium and New York Consortium on Membrane Protein Structure, Department of Chemistry, State University of New York at Buffalo, Buffalo, New York 14260, USA.
Journal of the American Chemical Society
|January 18, 2007
Resumen
La espectroscopia de RMN J-GFT mide con precisión los parámetros estructurales de las proteínas mediante la correlación de acoplamientos nucleares de espín-espín. Este nuevo método mejora la precisión de los acoplamientos dipolares residuales, lo que ayuda a la clasificación de los pliegues de proteínas.
Área de la Ciencia:
- Espectroscopia de Resonancia Magnética Nuclear (RMN) Espectroscopia de Resonancia Magnética Nuclear (RMN) Espectroscopia de Resonancia Magnética Nuclear (RMN) Espectroscopia de Resonancia Magnética Nuclear (RMN) Espectroscopia de Resonancia Magnética Nuclear (RMN) Espectroscopia de Resonancia Magnética Nuclear (RMN) Espectroscopia de Resonancia Magnética Nuclear (RMN) Espectroscopia de Resonancia Magnética Nuclear (RMN) Espectroscopia de Resonancia Magnética Nuclear (RMN) Espectroscopia de Resonancia Magnética Nuclear (RMN) Espectroscopia de Resonancia Magnética Nuclear (RMN) Espectroscopia de Resonancia Magnética Nuclear (RMN)
- Biología Estructural Biología estructural.
- La biofísica es la biofísica.
Sus antecedentes:
- La medición precisa de los cambios químicos y los acoplamientos espín-espín es crucial para determinar la estructura de las proteínas.
- Los métodos de RMN existentes pueden ser limitados en la medición simultánea de múltiples parámetros correlacionados.
Objetivo del estudio:
- Introducir y validar la espectroscopia de RMN con transformación de Fourier de matriz J-G (J-GFT) para la medición precisa de los parámetros de RMN.
- Para demostrar la utilidad de la RMN J-GFT para la medición de los acoplamientos dipolares residuales (RDC) en las proteínas.
Principales métodos:
- Desarrollo de un formalismo de RMN GFT extendido para RMN J-GFT.
- Implementación de un experimento de tiempo constante J-GFT (6,2) D (HA-CA-CO) -N-HN.
- Aplicación a un dominio Z de proteína de 8 kDa alineado con fagos Pf1 para la medición de RDC.
Principales resultados:
- Medición simultánea de desplazamientos químicos de columna vertebral de 15N y cuatro acoplamientos de espín-espín de un solo enlace.
- Alta precisión y exactitud en las mediciones de RDC en comparación con los experimentos convencionales de RMN.
- Los RDCs fueron codificados en forma múltiple, permitiendo mediciones estadísticamente independientes.
Conclusiones:
- La RMN J-GFT proporciona mediciones exactas y precisas de los parámetros de RMN, incluidos los CDR.
- La capacidad del método para correlacionar los acoplamientos por el sistema de espín ayuda a la identificación de la conformación de la columna vertebral de la proteína y la clasificación del pliegue.
- La RMN J-GFT tiene un amplio impacto potencial en la espectroscopia de RMN de proyección.
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