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Conocimiento funcional y evolutivo de la estructura cristalina de la proteína E1 del virus de la rubéola

Rebecca M DuBois¹, Marie-Christine Vaney, M Alejandra Tortorici

¹Institut Pasteur, Département de Virologie, Unité de Virologie Structurale and CNRS URA 3015, F-75724 Paris Cedex 15, France.

|January 8, 2013

Resumen

La estructura de la glicoproteína E1 del virus de la rubéola revela su mecanismo único de proteína de fusión de clase II. Este hallazgo es crucial para comprender la entrada del virus de la rubéola y desarrollar nuevas estrategias contra el síndrome de rubéola congénita.

Área de la Ciencia:

Virología Virología.
Biología Estructural Biología estructural.
Inmunología Inmunología.

Sus antecedentes:

El virus de la rubéola causa enfermedades leves en los niños pero sí síndrome congénito de rubéola grave in utero.
Si bien está relacionado con los alfavirus, el virus de la rubéola comparte características con los virus transmitidos por aerosoles como el sarampión y las paperas.
El síndrome de rubéola congénita sigue siendo un importante problema de salud mundial, particularmente en las naciones en desarrollo.

Objetivo del estudio:

Para determinar la estructura tridimensional de la envoltura del virus de la rubéola la glicoproteína E1.1.
Para dilucidar el mecanismo de la entrada celular mediada por E1 y la neutralización de anticuerpos.
Para comprender la relación evolutiva del virus de la rubéola E1 con otras proteínas de fusión viral.

Principales métodos:

1.8 Å resolución determinación de la estructura cristalina de la envoltura del virus de la rubéola glicoproteína E1.1.
Análisis estructural y comparación con otras proteínas de fusión viral.
Identificación del epítopo E1 y posibles sitios de neutralización.

Principales resultados:

La estructura cristalina del virus de la rubéola E1 se determinó a una resolución de 1,8 Å.
El virus de la rubéola E1 es una proteína de fusión de clase II, que anteriormente solo se caracterizaba en los alfavirus y los flavivirus.
E1 posee características únicas, incluyendo una extensa superficie de fusión de membrana con un sitio de unión de metal, distinto de otras proteínas de fusión conocidas.

Conclusiones:

La estructura proporciona información sobre la entrada del virus de la rubéola y los mecanismos de neutralización de anticuerpos.
El virus de la rubéola E1 representa una proteína de fusión de clase II única, lo que sugiere una divergencia evolutiva significativa.
Comprender estos aspectos estructurales y funcionales es vital para combatir las infecciones por el virus de la rubéola y el síndrome de rubéola congénita.

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