title: Rational design of inhibitors of VirA-VirG two-component signal transduction.
abstract: VirA-VirG two-component system regulates the vir (virulence) operon in response to specific host factors (xenognosins) in the plant pathogen Agrobacterium tumefaciens. Using whole cell assays, stable inhibitors inspired by the labile natural benzoxazinone inhibitor HDMBOA are developed. It is found that aromatic aldehydes represent a minimal structural unit for activity. In particular, 3-hydroxy-4,6-dimethoxy-3H-isobenzofuran-1-one (HDI) was found to have the highest activity, making it the most potent developed inhibitor of virulence gene expression in Agrobacterium.
authors.affiliation: Department of Chemistry, Center for Fundamental and Applied Molecular Evolution, Emory University, Atlanta, GA 30322, USA.
authors.forename: Justin
authors.initials: J
authors.lastname: Maresh
authors.forename: Jin
authors.initials: J
authors.lastname: Zhang
authors.forename: Yih-Ling
authors.initials: YL
authors.lastname: Tzeng
authors.forename: Nora A
authors.initials: NA
authors.lastname: Goodman
authors.forename: David G
authors.initials: DG
authors.lastname: Lynn
mesh_terms: D000447:Aldehydes / Q000494:pharmacology; D000998:Antiviral Agents / Q000494:pharmacology*; D001572:Benzofurans / Q000494:pharmacology*; D048588:Benzoxazines / Q000037:antagonists & inhibitors; D001681:Biological Assay; D015195:Drug Design; D015964:Gene Expression Regulation, Bacterial / Q000187:drug effects* / Q000235:genetics / Q000502:physiology; D012231:Rhizobium / Q000187:drug effects* / Q000235:genetics / Q000254:growth & development; D015398:Signal Transduction / Q000187:drug effects* / Q000235:genetics / Q000502:physiology; D014740:Vidarabine / Q000037:antagonists & inhibitors* / Q000235:genetics; D037521:Virulence Factors / Q000037:antagonists & inhibitors* / Q000235:genetics
chemical_list: C522190:3-hydroxy-4,6-dimethoxy-3H-isobenzofuran-1-one; D000447:Aldehydes; D000998:Antiviral Agents; D001572:Benzofurans; D048588:Benzoxazines; D037521:Virulence Factors; D014740:Vidarabine