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Dissecting the Molecular Mechanism of the Subcellular Localization and Cell-to-cell Movement of the Sugarcane mosaic virus P3N-PIPO.


ABSTRACT: The coding sequence of P3N-PIPO was cloned by fusion PCR from Sugarcane mosaic virus (SCMV), a main causal agent of sugarcane (Saccharum spp. hybrid) mosaic disease. SCMV P3N-PIPO preferentially localized to the plasma membrane (PM) compared with the plasmodesmata (PD), as demonstrated by transient expression and plasmolysis assays in the leaf epidermal cells of Nicotiana benthamiana. The subcellular localization of the P3N-PIPO mutants P3N-PIPOT1 and P3N-PIPOT2 with 29 and 63 amino acids deleted from the C-terminus of PIPO, respectively, revealed that the 19 amino acids at the N-terminus of PIPO contributed to the PD localization. Interaction assays showed that the 63 amino acids at the C-terminus of PIPO determined the P3N-PIPO interaction with PM-associated Ca2+-binding protein 1, ScPCaP1, which was isolated from the SCMV-susceptible sugarcane cultivar Badila. Like wild-type P3N-PIPO, P3N-PIPOT1 and P3N-PIPOT2 could translocate to neighbouring cells and recruit the SCMV cylindrical inclusion protein to the PM. Thus, interactions with ScPCaP1 may contribute to, but not determine, SCMV Pm3N-PIPO's localization to the PM or PD. These results also imply the existence of truncated P3N-PIPO in nature.

SUBMITTER: Cheng G 

PROVIDER: S-EPMC5575073 | biostudies-literature | 2017 Aug

REPOSITORIES: biostudies-literature

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Dissecting the Molecular Mechanism of the Subcellular Localization and Cell-to-cell Movement of the Sugarcane mosaic virus P3N-PIPO.

Cheng Guangyuan G   Dong Meng M   Xu Qian Q   Peng Lei L   Yang Zongtao Z   Wei Taiyun T   Xu Jingsheng J  

Scientific reports 20170829 1


The coding sequence of P3N-PIPO was cloned by fusion PCR from Sugarcane mosaic virus (SCMV), a main causal agent of sugarcane (Saccharum spp. hybrid) mosaic disease. SCMV P3N-PIPO preferentially localized to the plasma membrane (PM) compared with the plasmodesmata (PD), as demonstrated by transient expression and plasmolysis assays in the leaf epidermal cells of Nicotiana benthamiana. The subcellular localization of the P3N-PIPO mutants P3N-PIPOT1 and P3N-PIPOT2 with 29 and 63 amino acids delete  ...[more]

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