title: Transcriptional control of the cellulase genes in Trichoderma reesei.
abstract: The expression of the cellulase transcripts of Trichoderma reesei is controlled by the nature of the energy carbon sources used in the culture medium. Cellulose and the soluble disaccharide sophorose, but not glycerol or glucose, act as inducers. Evidence is presented suggesting that a low constitutive extracellular cellulolytic system catalyzes the formation of a soluble inducer from cellulose, and this inducer triggers the expression of the cellulase transcripts. This basal and cellulose-induced expression of the cellobiohydrolase I mRNAs (cbh1), the major member of the cellulase system, is transcriptionally controlled by two independent cis-acting DNA regions. In addition, expression of the cbh1 transcript is influenced by the physiological state of the mitochondria and this sensitivity is controlled through the 5'-flanking DNA sequence of this gene.
authors.affiliation: Departamento de Bioquímica, Universidade de São Paulo, Brasil. hfadorry@quim.iq.usp.br
authors.forename: H
authors.initials: H
authors.lastname: el-Dorry
authors.forename: O
authors.initials: O
authors.lastname: Crivellaro
authors.forename: A
authors.initials: A
authors.lastname: Leite
authors.forename: J
authors.initials: J
authors.lastname: Abrahäo-Neto
authors.forename: F
authors.initials: F
authors.lastname: Henrique-Silva
authors.forename: J
authors.initials: J
authors.lastname: Escobar-Vera
authors.forename: E
authors.initials: E
authors.lastname: Matheucci Júnior
authors.forename: J C
authors.initials: JC
authors.lastname: Carle-Urioste
authors.forename: G G
authors.initials: GG
authors.lastname: Pereira
authors.forename: D M
authors.initials: DM
authors.lastname: Carraro-Pereira
authors.forename: S
authors.initials: S
authors.lastname: el-Gogary
mesh_terms: D002480:Cellulase / Q000235:genetics*; D015966:Gene Expression Regulation, Fungal / Q000235:genetics*; D008928:Mitochondria / Q000502:physiology; D014158:Transcription, Genetic; D014242:Trichoderma / Q000235:genetics*
chemical_list: D002480:Cellulase