Sampaio A, Pegos VR, Oshiro EE, Balan A. The periplasmic binding protein NrtT affects xantham gum production and pathogenesis in
Xanthomonas citri.
FEBS Open Bio 2017;
7:1499-1514. [PMID:
28979839 PMCID:
PMC5623697 DOI:
10.1002/2211-5463.12281]
[Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2017] [Revised: 07/19/2017] [Accepted: 07/28/2017] [Indexed: 12/05/2022] Open
Abstract
In Xanthomonas citri, the bacterium that causes citrus canker, three ATP-binding cassette (ABC) transporters are known to be dedicated to the uptake of sulfur compounds. In this work, using functional, biophysical and structural methods, we showed that NrtT, a periplasmic component of the ABC transporter NrtCB, is an alkanesulfonate-binding protein and that the deletion of the nrtT gene affected xantham gum synthesis, adhesion and biofilm production, similarly to the phenotype obtained in the X. citri ssuA-knockout strain, in which the alkanesulfonate-binding protein SsuA is absent. Although NrtA and SsuA share similar ligands, the function of these proteins is not complementary. These results emphasize that organic-sulfur sources are directly involved with bacterial infection in vivo and are needed for pathogenesis in X. citri.
Collapse