Agrobacterium tumefaciens and Plant Cell Interactions and Activities Required for Interkingdom Macromolecular Transfer

Author:

McCullen Colleen A.12,Binns Andrew N.1

Affiliation:

1. Department of Biology and Plant Sciences Institute, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6018;

2. Current address: National Institutes of Health, Bethesda, Maryland 20892

Abstract

Host recognition and macromolecular transfer of virulence-mediating effectors represent critical steps in the successful transformation of plant cells by Agrobacterium tumefaciens. This review focuses on bacterial and plant-encoded components that interact to mediate these two processes. First, we examine the means by which Agrobacterium recognizes the host, via both diffusible plant-derived chemicals and cell-cell contact, with emphasis on the mechanisms by which multiple host signals are recognized and activate the virulence process. Second, we characterize the recognition and transfer of protein and protein-DNA complexes through the bacterial and plant cell membrane and wall barriers, emphasizing the central role of a type IV secretion system—the VirB complex—in this process.

Publisher

Annual Reviews

Subject

Cell Biology,Developmental Biology

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