Identification of TyeA residues required to interact with YopN and to regulate Yop secretion

Sabrina S. Joseph, Gregory V. Plano

Research output: Chapter in Book/Report/Conference proceedingConference contribution

15 Scopus citations


The secretion of Yops via the Yersinia type III secretion system (T3SS) is controlled, in part, by a cytoplasmic YopN/TyeA complex. This complex is required to prevent Yop secretion in the presence of extracellular calcium and prior to contact between the bacterium and a eukaryotic cell. In this study we utilized site-directed mutagenesis to analyze the role of specific TyeA regions and residues in the regulation of Yop secretion. We identified two spatially distinct, surface-exposed regions of the TyeA molecule that were required to regulate Yop secretion. One region, identified by residues M51, F55 and P56, was required for TyeA to interact with YopN. A second region, identified by residues R19, W20 and D25 was not involved in the interaction of TyeA with YopN, but may be required for the YopN/TyeA complex to interact with the T3S apparatus in a manner that blocks Yop secretion.

Original languageEnglish (US)
Title of host publicationThe Genus Yersinia
Subtitle of host publicationFrom Genomics to Function
PublisherSpringer New York
Number of pages11
ISBN (Print)9780387721231
StatePublished - 2007

Publication series

NameAdvances in Experimental Medicine and Biology
ISSN (Print)0065-2598

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)


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