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Assembly of Nucleosomal Arrays from Recombinant Core Histones and Nucleosome Positioning DNA
Published on: September 11, 2013
Estructura del factor de cromatina RCC1 unido a la partícula del núcleo del nucleosoma
Ravindra D Makde1, Joseph R England, Hemant P Yennawar
1Center for Eukaryotic Gene Regulation, Department of Biochemistry & Molecular Biology, The Pennsylvania State University, University Park, Pennsylvania 16802, USA.
Nature
|August 27, 2010
Resumen
El regulador de la condensación cromosómica (RCC1) de la proteína.
Área de la Ciencia:
- Biología molecular La biología molecular.
- Biología celular Biología celular.
- Biología estructural Biología estructural.
Sus antecedentes:
- La pequeña GTPasa Ran regula el transporte nuclear y la mitosis.
- La proteína RCC1 crea el gradiente RanGTP esencial para estas funciones.
- RCC1 se une a los nucleosomas, pero los detalles de la interacción eran desconocidos.
Objetivo del estudio:
- Para determinar los detalles moleculares de la interacción entre el RCC1 y el nucleosoma.
- Para proporcionar una visión a nivel atómico de cómo las proteínas de cromatina interactúan con los nucleosomas.
Principales métodos:
- Cristalografía de rayos X con rayos X.
- Determinó la estructura cristalina de un complejo de partículas de núcleo de Drosophila RCC1-nucleosoma con una resolución de 2,9 Å.
Principales resultados:
- Proporcionó una vista atómica de RCC1 interactuando con los componentes de histona y ADN del nucleosoma.
- La estructura reveló una partícula de núcleo de nucleosoma de 145-bp, que se desvía de la longitud canónica de 147-bp.
Conclusiones:
- El estudio aclara el mecanismo molecular de la unión de RCC1 a los nucleosomas.
- Los hallazgos ofrecen información sobre la estructura de la cromatina y su regulación por RCC1.
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