Determinants of pH-dependent modulation of translocation in dermonecrotic G-protein-deamidating toxins
Cytotoxic necrotizing factors from E. coli (CNF1, CNF2) and Yersinia (CNFy)share N-terminal sequence similarity with Pasteurella multocida toxin (PMT). This common N-terminal region harbors the receptor-binding and translocation domains that mediate uptake and delivery of the C-terminal catalytic ca...
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Published in | Toxins Vol. 5; no. 6; pp. 1167 - 1179 |
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Main Authors | , , |
Format | Journal Article |
Language | English |
Published |
Switzerland
MDPI AG
01.06.2013
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Subjects | |
Online Access | Get full text |
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Summary: | Cytotoxic necrotizing factors from E. coli (CNF1, CNF2) and Yersinia (CNFy)share N-terminal sequence similarity with Pasteurella multocida toxin (PMT). This common N-terminal region harbors the receptor-binding and translocation domains that mediate uptake and delivery of the C-terminal catalytic cargo domains into the host cytosol. Subtle variations in the N-terminal ~500 amino acids of CNFs and PMT could allow for selective recognition of cellular receptors and thus, selective target cell specificity. Through studies with cellular inhibitors, we have identified an additional novel function for this region in modulating responses of these toxin proteins to changes in pH during intoxication and delivery of the catalytic cargo domain into the cytosol. |
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ISSN: | 2072-6651 2072-6651 |
DOI: | 10.3390/toxins5061167 |