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Updated: Jul 27, 2026

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Vaccinia Virus Infection & Temporal Analysis of Virus Gene Expression: Part 1
Published on: April 8, 2009
El virus Vaccinia codifica un polipéptido homólogo al factor de crecimiento epidérmico y al factor de crecimiento
Nature
|February 7, 1985
Resumen
Una proteína del virus de la vacuna se asemeja mucho al factor de crecimiento epidérmico (EGF) y al factor de crecimiento transformador (TGF). Esta proteína viral puede causar enfermedades proliferativas en las infecciones por poxvirus.
Área de la Ciencia:
- Virología Virología.
- Biología Molecular Biología Molecular
- Biología celular Biología celular.
Sus antecedentes:
- El factor de crecimiento epidérmico (EGF) y el factor de crecimiento transformador (TGF) son polipéptidos clave que se unen al receptor EGF, iniciando las vías de señalización del crecimiento celular.
- El receptor del FEA es una glicoproteína transmembrana que, al unirse al ligando, se somete a autofosforilación y activa su actividad intrínseca de tirosina quinasa, promoviendo la proliferación celular.
Objetivo del estudio:
- Para investigar la relación entre un producto genético temprano del virus de la vacuna (VV) y los factores de crecimiento conocidos.
- Explorar el papel potencial de los factores de crecimiento codificados por virus en las enfermedades proliferativas asociadas al poxvirus.
Principales métodos:
- Análisis de secuencia de un polipéptido de 140 residuos codificado por un gen temprano del virus de la vacuna.
- Identificación de la señal putativa y las secuencias transmembranosas dentro de la proteína viral.
- Comparación de la estructura y la función potencial de la proteína viral con el EGF y el TGF.
Principales resultados:
- Un polipéptido de 140 residuos del virus de la vacuna muestra una estrecha homología con el EGF y el TGF.
- La proteína viral posee señales predichas y secuencias transmembranosas, lo que sugiere que es una proteína de membrana integral.
- La forma ligada a la membrana de la proteína viral puede servir como precursor de un factor de crecimiento soluble, similar al EGF.
Conclusiones:
- El virus Vaccinia codifica una proteína estructuralmente relacionada con el EGF y el TGF.
- La capacidad de esta proteína viral para actuar como un factor de crecimiento podría explicar las condiciones de proliferación vinculadas a los poxvirus como el virus del fibroma de Shope, el virus del tumor de Yaba y el virus del molusco contagioso (MCV).
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