Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9144673 | Physiological and Molecular Plant Pathology | 2005 | 9 Pages |
Abstract
The cel5A gene, coding for an extracellular endo-Ã-1,4-glucanase, has been cloned from the phytopathogenic fungus Botrytis cinerea. The gene contains only one 62-bp intron and encodes a putative protein of 424 amino acids with a signal peptide, a family-5 glycosyl hydrolase domain, and a serine-threonine-rich domain of unknown function. The levels of cel5A transcript and extracellular Ã-1,4-glucanase activity were regulated by the carbon source in the same way: both were induced by carboxymethylcellulose and repressed by glucose. The cel5A mRNA could also be detected during the infection of tomato leaves by B. cinerea. Disruption of cel5A results in a strain with identical virulence as the wild-type on tomato leaves or gerbera petals, with no significant reduction in the extracellular Ã-1,4-glucanase activity, and with similar growth rate with carboxymethylcellulose or Avicel as the only carbon sources.
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Authors
J.J. Espino, N. Brito, J. Noda, C. González,