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Kobayashi C, Kato M, Nagaya H, Shimizu N, Ishibashi K, Ishikawa M, Katoh E. Purification and functional characterization of tomato mosaic virus 130K protein expressed in silkworm pupae using a baculovirus vector. Protein Expr Purif 2018; 154:85-90. [PMID: 30291968 DOI: 10.1016/j.pep.2018.10.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2018] [Revised: 10/01/2018] [Accepted: 10/01/2018] [Indexed: 01/21/2023]
Abstract
Tomato mosaic virus (ToMV; genus, Tobamovirus) is a member of the alpha-like virus superfamily of positive-strand RNA viruses, which includes many plant and animal viruses of agronomical and clinical importance. The genomes of alpha-like viruses encode replication-associated proteins that contain methyltransferase, helicase and/or polymerase domains. The three-dimensional structure of the helicase domain fragment of ToMV has been determined, but the structures of the other domains of alpha-like virus replication proteins are not available. In this study, we expressed full-length ToMV replication-associated protein 130 K, which contains the methyltransferase and helicase domains, using the baculovirus-silkworm expression system and purified the recombinant protein to near homogeneity. Purified 130 K, which was stable in phosphate buffer containing magnesium ions and ATP, formed a dimer in solution and hydrolyzed nucleoside 5'-triphosphates.
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Affiliation(s)
- Chihoko Kobayashi
- Structural Biology Team, Advanced Analysis Center, National Agriculture and Food Research Organization, Tsukuba, Ibaraki, 305-8602, Japan
| | - Masahiko Kato
- Business Development, Research and Industry Business, Sysmex Corporation, Kobe, Hyogo, 651-2241, Japan
| | - Hidekazu Nagaya
- Business Development, Research and Industry Business, Sysmex Corporation, Kobe, Hyogo, 651-2241, Japan
| | - Nobutaka Shimizu
- Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK), 1-1 Oho, Tsukuba, Ibaraki, 305-0801, Japan
| | - Kazuhiro Ishibashi
- Plant and Microbial Research Unit, Institute of Agrobiological Science, National Agriculture and Food Research Organization, Tsukuba, Ibaraki, 305-8602, Japan
| | - Masayuki Ishikawa
- Plant and Microbial Research Unit, Institute of Agrobiological Science, National Agriculture and Food Research Organization, Tsukuba, Ibaraki, 305-8602, Japan
| | - Etsuko Katoh
- Structural Biology Team, Advanced Analysis Center, National Agriculture and Food Research Organization, Tsukuba, Ibaraki, 305-8602, Japan.
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Devanna NB, Vijayan J, Sharma TR. The blast resistance gene Pi54of cloned from Oryza officinalis interacts with Avr-Pi54 through its novel non-LRR domains. PLoS One 2014; 9:e104840. [PMID: 25111047 PMCID: PMC4128725 DOI: 10.1371/journal.pone.0104840] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2014] [Accepted: 07/15/2014] [Indexed: 11/23/2022] Open
Abstract
The dominant rice blast resistance gene Pi54 cloned by map-based cloning approach from indica rice cultivar Tetep confers broad spectrum resistance to Magnaporthe oryzae. In this investigation, an orthologue of Pi54 designated as Pi54of was cloned from Oryza officinalis conferring high degree of resistance to M. oryzae and is functionally validated. We have also characterized the Pi54of protein and demonstrate its interaction with AVR-Pi54 protein. The Pi54of encoded ∼43 kDa small and unique cytoplasmic LRR family of disease resistance protein having unique Zinc finger domain overlapped with the leucine rich repeat regions. Pi54of showed Magnaporthe-induced expression. The phylogenetic and western blot analysis confirmed orthologous nature of Pi54 and Pi54of genes, whereas the identity of protein was confirmed through MALDI-TOF analysis. The in silico analysis showed that Pi54of is structurally more stable than other cloned Pi54 proteins. The molecular docking revealed that Pi54of protein interacts with AVR-Pi54 through novel non-LRR domains such as STI1 and RhoGEF. The STI1 and GEF domains which interact with AVR-Pi54 are also components of rice defensome complex. The Pi54of protein showed differential domain specificity while interacting with the AVR protein. Functional complementation revealed that Pi54of transferred in two rice lines belonging to indica and japonica background imparts enhanced resistance against three highly virulent strains of M. oryzae. In this study, for the first time, we demonstrated that a rice blast resistance gene Pi54of cloned from wild species of rice provides high degree of resistance to M. oryzae and might display different molecular mechanism involved in AVRPi54-Pi54of interaction.
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Affiliation(s)
- Navadagi B. Devanna
- National Research Centre on Plant Biotechnology, Indian Agricultural Research Institute, New Delhi, India
| | - Joshitha Vijayan
- National Research Centre on Plant Biotechnology, Indian Agricultural Research Institute, New Delhi, India
| | - Tilak R. Sharma
- National Research Centre on Plant Biotechnology, Indian Agricultural Research Institute, New Delhi, India
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Devanna NB, Vijayan J, Sharma TR. The blast resistance gene Pi54of cloned from Oryza officinalis interacts with Avr-Pi54 through its novel non-LRR domains. PLoS One 2014. [PMID: 25111047 DOI: 10.137/journal.pone.0104840] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/10/2023] Open
Abstract
The dominant rice blast resistance gene Pi54 cloned by map-based cloning approach from indica rice cultivar Tetep confers broad spectrum resistance to Magnaporthe oryzae. In this investigation, an orthologue of Pi54 designated as Pi54of was cloned from Oryza officinalis conferring high degree of resistance to M. oryzae and is functionally validated. We have also characterized the Pi54of protein and demonstrate its interaction with AVR-Pi54 protein. The Pi54of encoded ∼43 kDa small and unique cytoplasmic LRR family of disease resistance protein having unique Zinc finger domain overlapped with the leucine rich repeat regions. Pi54of showed Magnaporthe-induced expression. The phylogenetic and western blot analysis confirmed orthologous nature of Pi54 and Pi54of genes, whereas the identity of protein was confirmed through MALDI-TOF analysis. The in silico analysis showed that Pi54of is structurally more stable than other cloned Pi54 proteins. The molecular docking revealed that Pi54of protein interacts with AVR-Pi54 through novel non-LRR domains such as STI1 and RhoGEF. The STI1 and GEF domains which interact with AVR-Pi54 are also components of rice defensome complex. The Pi54of protein showed differential domain specificity while interacting with the AVR protein. Functional complementation revealed that Pi54of transferred in two rice lines belonging to indica and japonica background imparts enhanced resistance against three highly virulent strains of M. oryzae. In this study, for the first time, we demonstrated that a rice blast resistance gene Pi54of cloned from wild species of rice provides high degree of resistance to M. oryzae and might display different molecular mechanism involved in AVRPi54-Pi54of interaction.
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Affiliation(s)
- Navadagi B Devanna
- National Research Centre on Plant Biotechnology, Indian Agricultural Research Institute, New Delhi, India
| | - Joshitha Vijayan
- National Research Centre on Plant Biotechnology, Indian Agricultural Research Institute, New Delhi, India
| | - Tilak R Sharma
- National Research Centre on Plant Biotechnology, Indian Agricultural Research Institute, New Delhi, India
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