A novel proteinase inhibitor gene transiently induced by tobacco mosaic virus infection

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Title
A novel proteinase inhibitor gene transiently induced by tobacco mosaic virus infection
Author(s)
Kyung Soon Park; Jong Joo Cheong; Sang Jik Lee; Mi Chung Suh; Do Il Choi
Bibliographic Citation
Biochimica et Biophysica Acta-Gene Regulatory Mechanisms, vol. 1492, no. 2, pp. 509-512
Publication Year
2000
Abstract
A gene (NgPI) encoding a novel proteinase inhibitor (PI) has been isolated from tobacco leaves. Protein encoded by the gene consists of 241 amino acid residues having a predicted molecular mass of 26.7 kDa and a calculated pI of 8.7. A predicted N-terminal signal sequence followed by a vacuolar targeting signal and a peptide conserved in the Kunitz type PIs were identified. The deduced NgPI protein has sequence homology with aspartic and cysteine protease inhibitors. The gene is present as double copies in the Nicotiana glutinosa genome. Expression of the NgPI gene is rapidly and transiently induced by tobacco mosaic virus infection at a time earlier than apparent lesions of hypersensitive responses appear on the leaves.
Keyword
woundingproteinase inhibitortobaccoplant defensetobacco mosaic virus
ISSN
1874-9399
Publisher
Elsevier
DOI
http://dx.doi.org/10.1016/S0167-4781(00)00126-3
Type
Article
Appears in Collections:
1. Journal Articles > Journal Articles
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