6ndo

Structural highlights

Function

[BPHY_XANC8] Photoreceptor which exists in two forms that are reversibly interconvertible by light: far-red light (733 nm) converts protein to the red-absorbing (Pr) form, while red light (630 nm) partly converts the protein to the far-red-absorbing (Pfr) form (PubMed:27107635). Regulates virulence of X.campestris pv. campestris on its host plants, perhaps by fine-tuning expression to ambient light levels and/or spatial cues (PubMed:27621284). The Pr form may sense light and partially inhibit virulence; in the dark (Pfr form) biofilm and xanathan production rise and bacteria are more virulent (PubMed:27621284). Strains overexpressing this protein have significantly decreased amounts of extracellular beta-1,4-endoglucanase, produce less xanthin and have decreased transcription of genes involved in virulence such as endoglucanases, type 2 secretion systems, xanthan production and flagellar-dependent motility (PubMed:27621284).^{[1] [2] [3]}

References

1. ↑ Otero LH, Klinke S, Rinaldi J, Velazquez-Escobar F, Mroginski MA, Fernandez Lopez M, Malamud F, Vojnov AA, Hildebrandt P, Goldbaum FA, Bonomi HR. Structure of the Full-Length Bacteriophytochrome from the Plant Pathogen Xanthomonas campestris Provides Clues to its Long-Range Signaling Mechanism. J Mol Biol. 2016 Apr 20. pii: S0022-2836(16)30071-7. doi:, 10.1016/j.jmb.2016.04.012. PMID:27107635 doi:http://dx.doi.org/10.1016/j.jmb.2016.04.012
2. ↑ Bonomi HR, Toum L, Sycz G, Sieira R, Toscani AM, Gudesblat GE, Leskow FC, Goldbaum FA, Vojnov AA, Malamud F. Xanthomonas campestris attenuates virulence by sensing light through a bacteriophytochrome photoreceptor. EMBO Rep. 2016 Nov;17(11):1565-1577. doi: 10.15252/embr.201541691. Epub 2016 Sep , 12. PMID:27621284 doi:http://dx.doi.org/10.15252/embr.201541691
3. ↑ Bonomi HR, Toum L, Sycz G, Sieira R, Toscani AM, Gudesblat GE, Leskow FC, Goldbaum FA, Vojnov AA, Malamud F. Xanthomonas campestris attenuates virulence by sensing light through a bacteriophytochrome photoreceptor. EMBO Rep. 2016 Nov;17(11):1565-1577. doi: 10.15252/embr.201541691. Epub 2016 Sep , 12. PMID:27621284 doi:http://dx.doi.org/10.15252/embr.201541691