Cytotoxic Necrotizing Factors (CNFs)−A Growing Toxin Family

The Escherichia coli Cytotoxic Necrotizing Factors, CNF1, CNF2, CNF3 and CNFY from Yersinia pseudotuberculosis belong to a family of deamidating toxins. CNFs deamidate glutamine 63/61 in the switch II region of Rho GTPases that is essential for GTP hydrolysing activity. Deamidation leads to constitu...

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Detalles Bibliográficos
Autores principales: Knust, Zeynep, Schmidt, Gudula
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Molecular Diversity Preservation International 2011
Materias:
Review
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3206620/
https://www.ncbi.nlm.nih.gov/pubmed/22069550
http://dx.doi.org/10.3390/toxins2010116
Descripción
Sumario:The Escherichia coli Cytotoxic Necrotizing Factors, CNF1, CNF2, CNF3 and CNFY from Yersinia pseudotuberculosis belong to a family of deamidating toxins. CNFs deamidate glutamine 63/61 in the switch II region of Rho GTPases that is essential for GTP hydrolysing activity. Deamidation leads to constitutive activation of Rho GTPases. However, cellular mechanisms like proteasomal degradation of the activated Rho proteins restrict the action of the GTPases. This review describes the differences between the toxin family members concerning expression, cellular entry and substrate specificity.

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