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Science 20 December 1996:
Vol. 274. no. 5295, pp. 2063 - 2065
DOI: 10.1126/science.274.5295.2063
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Reports

Molecular Basis of Gene-for-Gene Specificity in Bacterial Speck Disease of Tomato

Steven R. Scofield, * Christian M. Tobias, * John P. Rathjen, Jeff H. Chang, Daniel T. Lavelle, Richard W. Michelmore, Brian J. Staskawicz dagger

Transient expression of the Pseudomonas syringae avirulence gene avrPto in plant cells resulted in a Pto-dependent necrosis. The AvrPto avirulence protein was observed to interact directly with the Pto resistance protein in the yeast two-hybrid system. Mutations in the Pto and avrPto genes which reduce in vivo activity had parallel effects on association in the two-hybrid assay. These data suggest that during infection the pathogen delivers AvrPto into the plant host cell and that resistance is specified by direct interaction of Pto with AvrPto.

S. R. Scofield, J. P. Rathjen, J. H. Chang, D. T. Lavelle, NSF Center for Engineering Plants for Resistance Against Pathogens (CEPRAP), University of California, Davis, CA 95616.
C. M. Tobias, Department of Plant and Microbial Biology, University of California, Berkeley, CA 94720.
R. W. Michelmore, NSF Center for Engineering Plants for Resistance Against Pathogens and Department of Vegetable Crops, University of California, Davis, CA 95616.
B. J. Staskawicz, NSF Center for Engineering Plants for Resistance Against Pathogens and Department of Plant and Microbial Biology, University of California, Davis, CA 94720.
*   These authors made equal contributions to this report.

dagger    To whom correspondence should be addressed. E-mail: stask{at}garnet.berkeley.edu

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   Abstract »    Full Text »    PDF »
HrpZPsph from the plant pathogen Pseudomonas syringae pv. phaseolicola binds to lipid bilayers and forms an ion-conducting pore invitro.
J. Lee, B. Klusener, G. Tsiamis, C. Stevens, C. Neyt, A. P. Tampakaki, N. J. Panopoulos, J. Noller, E. W. Weiler, G. R. Cornelis, et al. (2001)
PNAS 98, 289-294
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The gene coding for the Hrp pilus structural protein is required for type III secretion of Hrp and Avr proteins in Pseudomonas syringae pv. tomato.
W. Wei, A. Plovanich-Jones, W.-L. Deng, Q.-L. Jin, A. Collmer, H.-C. Huang, and S. Y. He (2000)
PNAS 97, 2247-2252
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The Cf-9 Disease Resistance Protein Is Present in an ~420-Kilodalton Heteromultimeric Membrane-Associated Complex at One Molecule per Complex.
S. Rivas, T. Romeis, and J. D. G. Jones (2002)
PLANT CELL 14, 689-702
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