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Comparison of Tobamovirus Coat Protein Structural Features That Affect Elicitor Activity in Pepper, Eggplant, and Tobacco

March 1999 , Volume 12 , Number  3
Pages  247 - 251

Christopher D. Dardick , 1 Zenobia Taraporewala , 1 Bin Lu , 2 and James N. Culver 1 , 2 , 3

1Molecular and Cell Biology Program and 2Department of Plant Biology, University of Maryland; and 3Center for Agricultural Biotechnology, University of Maryland Biotechnology Institute, College Park 20742, U.S.A.

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Accepted 9 November 1998.

Specific mutations designed to affect the tertiary, quaternary, and surface structures of the tobacco mosaic tobamovirus (TMV) coat protein (CP) were compared for their effect on CP elicitor activity in pepper (L1 gene), eggplant, and tobacco (N′ gene). Recognition by all three hosts was dependent upon the maintenance of the CP's α-helical bundle. However, variations in recognition resulted from mutations that affected different CP surface features and/or quaternary configurations. The relationship between CP structure and recognition in these hosts is discussed.

Additional keywords: hypersensitive response.

© 1999 The American Phytopathological Society