Title

Isolation of Rhp-PSP, a Member of YER057c/YjgF/UK114 Protein Family with Antiviral Properties, from the Photosynthetic Bacterium Rhodopseudomonas palustris Strain JSC-3b

Abstract

Rhodopseudomonas palustris strain JSC-3b isolated from a water canal adjacent to a vegetable field produces a protein that was purified by bioactivity-guided fractionation based on ammonium sulfate precipitation, ion-exchange absorption and size exclusion. The protein was further identified as an endoribonuclease L-PSP (Liver-Perchloric acid-soluble protein) by shotgun mass spectrometry analysis and gene identification, and it is member of YER057c/YjgF/UK114 protein family. Herein, this protein is designated Rhp-PSP. Rhp-PSP exhibited significant inhibitory activities against tobacco mosaic virus (TMV) in vivo and in vitro. To our knowledge, this represents the first report on the antiviral activity of a protein of the YER057c/YjgF/UK114 family and also the first antiviral protein isolated from R. palustris. Our research provides insight into the potential of photosynthetic bacterial resources in biological control of plant virus diseases and sustainable agriculture.

Document Type

Article

Publication Date

11-4-2015

Notes/Citation Information

Published in Scientific Reports, v. 5, article 16121, p. 1-10.

Copyright © 2015, Macmillan Publishers Limited

This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/

Digital Object Identifier (DOI)

http://dx.doi.org/10.1038/srep16121

Funding Information

This research was supported by the Special Fund for the Agro-scientific Research in the Public Interest (201303028), the National Science Foundation of China (31272067) and the Agricultural Research System of China (CARS-25-B-05).

srep16121-s1.xls (89 kB)
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