title: Interaction between potyvirus P3 and ribulose-1,5-bisphosphate carboxylase/oxygenase (RubisCO) of host plants.
abstract: The P3 protein encoded by Shallot yellow stripe virus onion isolate (SYSV-O) interacted in the Yeast Two-hybrid (Y2H) system and in co-immunoprecipitation (Co-IP) assays with the large subunit of the ribulose-1,5-bisphosphate carboxylase/oxygenase (RubisCO) protein that is encoded by the rbcL gene of its onion host. Dissection analysis by Y2H showed that the main part of SYSV P3 (amino acids 1-390) and onion RbcL (amino acids 1-137) were responsible for the interaction. The P3 proteins encoded by Onion yellow dwarf virus (OYDV), Soybean mosaic virus Pinellia isolate (SMV-P), and Turnip mosaic virus (TuMV) also interacted with RbcL, suggesting that a P3/RbcL interaction might exist generally for potyviruses. An interaction between P3 of these potyviruses and the small subunit of RubisCO (RbcS) was also demonstrated. Moreover, the P3N-PIPO protein encoded by a newly identified open reading frame embedded within the P3 cistron also interacted with both RbcL and RbcS. It is possible that the potyvirus P3 protein affects the normal functions of RubisCO which thus contributes to symptom development.
authors.affiliation: State Key Laboratory Breeding Base for Zhejiang Sustainable Pest and Disease Control, Institute of Virology and Biotechnology, Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021, China.
authors.forename: Lin
authors.initials: L
authors.lastname: Lin
authors.forename: Zhaopeng
authors.initials: Z
authors.lastname: Luo
authors.forename: Fei
authors.initials: F
authors.lastname: Yan
authors.forename: Yuwen
authors.initials: Y
authors.lastname: Lu
authors.forename: Hongying
authors.initials: H
authors.lastname: Zheng
authors.forename: Jianping
authors.initials: J
authors.lastname: Chen
mesh_terms: D054884:Host-Pathogen Interactions; D047468:Immunoprecipitation; D019697:Onions / Q000821:virology*; D017800:Potyvirus / Q000472:pathogenicity*; D011485:Protein Binding; D025941:Protein Interaction Mapping; D012273:Ribulose-Bisphosphate Carboxylase / Q000378:metabolism*; D020798:Two-Hybrid System Techniques; D014764:Viral Proteins / Q000378:metabolism*
chemical_list: D014764:Viral Proteins; D012273:Ribulose-Bisphosphate Carboxylase