Regulation of the Production of Pectinases and Other Extracellular Enzymes in the Soft-Rotting Erwinia spp.

  • A. K. Chatterjee
  • J. L. McEvoy
  • H. Murata
  • A. Collmer


Members of the enterobacterial genus Erwinia cause diseases in a wide variety of plant hosts producing an array of symptoms including necrosis, wilt, gall, and soft-rot. In addition to bona fide plant pathogens, this genus houses commensals such as E. herbicola that largely sustain an epiphytic lifestyle, but can occasionally infect immunocompromised humans and animals. During the past decade Erwinia spp. have been extensively studied and several reviews (Chatterjee et al., 1990; Chatterjee et al., 1986; Collmer et al., 1986; Kotoujansky, 1987) discuss contemporary developments. For that reason and for the sake of brevity in this report we focus primarily on our recent work on the regulation of the production of pectinases and other extracellular enzymes in the soft-rotting bacteria: E. chrysanthemi (Echr) strain EC16 and E. carotovora subsp. carotovora (Ecc) strain Ecc71. The evidence presented here allows the following general conclusions: (1) The pel (pectate lyase) genes of EC16 are regulated differently. (2) Extracellular enzyme production in Ecc71 is subject to a common control. (3) Pectin lyase production in Ecc71 in response to DNA-damaging agents requires a transcriptional activator.


Extracellular Enzyme Pectate Lyase Pectin Lyase Pectolytic Enzyme Pectinase Production 
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Copyright information

© Springer Science+Business Media New York 1991

Authors and Affiliations

  • A. K. Chatterjee
  • J. L. McEvoy
  • H. Murata
  • A. Collmer

There are no affiliations available

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