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Unexpected homology between inducible cell wall protein QID74 of filamentous fungi and BR3 salivary protein of the insect Chironomus

Opened Access Unexpected homology between inducible cell wall protein QID74 of filamentous fungi and BR3 salivary protein of the insect Chironomus

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Autor: Rey, Manuel
Ohno, Susumu
Pintor Toro, José Antonio
Benítez Fernández, Concepción Tahía
Departamento: Universidad de Sevilla. Departamento de Genética
Fecha: 1998
Publicado en: Proceedings of the National Academy of Sciences of the United States of America, 95 (11), 6212-6216.
Tipo de documento: Artículo
Resumen: A gene, qid74, of mycoparasitic filamentous fungus Trichoderma harzianum and its allies encodes a cell wall protein that is induced by replacing glucose in the culture medium with chitin (simulated mycoparasitism conditions). Because no trace of this gene can be detected in related species such as Gibberella fujikuroi and Saccharomyces cerevisiae, the qid74 gene appears to have arisen de novo within the genus Trichoderma. Qid74 protein, 687 residues long, is now seen as highly conserved tandem repeats of the 59- residue-long unit. This unit itself, however, may have arisen as tandem repeats of the shorter 13-residue-long basic unit. Within the genus Trichoderma, the amino acid sequence of Qid74 proteins has been conserved in toto. The most striking is the fact that Qid74 shares 25.3% sequence identity with the carboxyl-terminal half of the 1,572-residue-long BR3 protein of the dipteran insect Chironomus tentans. BR3 protein is secreted by the salivary gland of each aquatic larva of Ch...
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Cita: Rey, M., Ohno, S., Pintor Toro, J.A. y Benítez Fernández, C.T. (1998). Unexpected homology between inducible cell wall protein QID74 of filamentous fungi and BR3 salivary protein of the insect Chironomus. Proceedings of the National Academy of Sciences of the United States of America, 95 (11), 6212-6216.
Tamaño: 353.9Kb
Formato: PDF

URI: https://hdl.handle.net/11441/69758

DOI: 10.1073/pnas.95.11.6212

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