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Proteome analysis of plant-induced proteins of Agrobacterium tumefaciens

✍ Scribed by Ran Rosen; Ann G Matthysse; Dörte Becher; Dvora Biran; Takashi Yura; Michael Hecker; Eliora Z Ron

Publisher
John Wiley and Sons
Year
2003
Tongue
English
Weight
280 KB
Volume
44
Category
Article
ISSN
0168-6496

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✦ Synopsis

Abstract A proteome study of Agrobacterium tumefaciens exposed to plant roots demonstrated the existence of a plant-dependent stimulon. This stimulon was induced by exposure to cut roots and consists of at least 30 soluble proteins (pI 4-7), including several proteins whose involvement in agrobacteria-host interactions has not been previously reported. Exposure of the bacteria to tomato roots also resulted in modification of the proteins: Ribosomal Protein L19, GroEL, AttM, and ChvE, indicating the significance of protein modifications in the interactions of agrobacteria with plants.

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The effect of a large number of Tn3 insertions in the vir region of the Ti plasmid pTiA6NC on the virulence of Agrobacterium was determined. The Vir- insertions were mapped in three of the five loci that have been defined previously. Merodiploid Rec- strains carrying one insertion mutation on the Ti