NDLI: Characterization of ech-42, a Trichoderma harzianum endochitinase gene expressed during mycoparasitism.

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Characterization of ech-42, a Trichoderma harzianum endochitinase gene expressed during mycoparasitism.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Carsolio, C. Van Montagu, M. Jiménez, B. Herrera-estrella, A. Gutiérrez, A.
Description	Author Affiliation: Carsolio C ( Centro de Investigación y Estudios Avanzados, Unidad Irapuato, Guanajuato, México.);
Abstract	A gene (ech-42; previously named ThEn-42) coding for one of the endochitinases produced by the biocontrol agent Trichoderma harzianum IMI206040 was cloned and characterized. Expression of the cDNA clone in Escherichia coli resulted in bacteria with chitinase activity. This chitinase has been shown to have lytic activity on Botrytis cinerea cell walls in vitro. The ech-42 gene was assigned to a double chromosomal band (chromosome V or VI) upon electrophoretic separation and Southern analysis of the chromosomes. Primer extension analysis indicated that transcription of the gene begins preferentially 109 bp upstream of the translation initiation codon. Expression of ech-42 was strongly enhanced during direct interaction of the mycoparasite with a phytopathogenic fungus when confronted in vitro and by growing it in minimal medium containing chitin as sole carbon source. Similarly, light-induced sporulation resulted in high levels of transcript, suggesting developmental regulation of the gene. The implications of these findings are discussed.
ISSN	00278424
e-ISSN	10916490
Journal	Proceedings of the National Academy of Sciences of the United States of America
Issue Number	23
Volume Number	91
Language	English
Publisher	National Academy of Sciences
Publisher Date	1994-12-01
Publisher Place	United States
Access Restriction	Open
Subject Keyword	Chitinase Genetics Trichoderma Amino Acid Sequence Chitin Pharmacology Chromosome Mapping DNA Primers Chemistry DNA, Complementary DNA, Fungal Enzyme Induction Drug Effects Gene Expression Regulation, Developmental Gene Expression Regulation, Fungal Genes, Fungal Molecular Sequence Data RNA, Fungal RNA, Messenger Enzymology Pathogenicity Research Support, Non-U.S. Gov't Multidisciplinary
Content Type	Text
Resource Type	Article
Subject	Multidisciplinary

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