XanFur, a novel Fur protein induced by HO, positively regulated by the global transcriptional regulator Clp and required for the full virulence of pv. in rice.

Although pv. () has been found to be a bacterial pathogen causing bacterial leaf blight in rice for many years, the molecular mechanisms of the rice- interaction has not been fully understood. In this study, we found that XanFur of is a novel ferric uptake regulator (Fur) protein conserved among major pathogenic species. XanFur is required for the virulence of in rice, and likely involved in regulating the virulence determinants of . The expression of is induced by HO, and positively regulated by the global transcriptional regulator Clp. Our results reveal the function and regulation of the novel virulence-related Fur protein XanFur in providing new insights into the interaction mechanisms of rice-.