Please use this identifier to cite or link to this item: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1076994
Research center of Embrapa/Collection: Embrapa Agroindústria de Alimentos - Artigo em periódico indexado (ALICE)
Date Issued: 2017
Type of Material: Artigo em periódico indexado (ALICE)
Authors: TAMIETTI, M. S.
MIDORIKAWA, G. E. O.
MENDES, T. D.
DAMASO, M. C. T.
BOM, E. P. S.
SILVA, A. S.
GOTTSCHALK, L. M. F.
NORONHA, E. F.
FAVARO, L. C. de L.
Additional Information: MARIANA S. TAMIETTI, UNB; GLÁUCIA E. O. MIDORIKAWA; THAIS DEMARCHI MENDES, CNPAE; MONICA CARAMEZ TRICHES DAMASO, CNPAE; ELBA P. S. BOM, UFRJ; AYLA S. SILVA, INT; LEDA MARIA FORTES GOTTSCHALK, CTAA; ELIANE F. NORONHA, UNB; LEIA CECILIA DE LIMA FAVARO, CNPAE.
Title: Enhancement of Trichoderma harzianum CFAM-422 for cellulase and hemicellulase production by deletion of the carbon catabolite repressor gene cre1.
Publisher: In: SIMPÓSIO NACIONAL DE BIOPROCESSOS, 21.; SIMPÓSIO DE HIDRÓLISE ENZIMÁTICA DE BIOMASSA, 12., 2017, Aracaju, SE. [Proceedings ...]. São Paulo: Associação Brasileira de Engenharia Química, 2017.
Pages: Não paginado.
Language: en
Notes: SINAFERM; SHEB. 3 a 6 de setembro. Seção Trabalhos. Ref. 59019.
Keywords: Processos de hidrolise enzimática de biomassa
Carbon Catabolite Repression
Cellulolytic and hemicellulolytic enzymes.
Description: Carbon catabolite repression (CCR) is a mechanism by which microorganisms can utilize preferably highly energetic compounds over those of difficult degradation. For Trichoderma reesei, the protein that acts as repressor in the presence of glucose is CRE1. In this project, we aim to delete cre1 gene in Trichoderma harzianum CFAM-422 and obtain mutants with enhanced production of biomass degrading enzymes. Disruption of cre1 in T. harzianum CFAM-422 was performed by gene replacement of cre1 for hph (hygromycin B phosphotransferase) via homologous recombination. Hygromycin resistant mutants and parental strains enzyme production was evaluated in both inductive and repressive conditions in four different carbon sources. Enzymatic indexes (EI) were determined and compared. All genetically stable transformants showed increased enzymatic index under inductive conditions and modest inhibition under repressive conditions for most carbon sources, indicating that the deletion of cre1 in T. harzianum can be beneficial to cellulase and hemicellulase production with reduced product inhibition.
Thesagro: Celulase
Trichoderma Harzianum.
Data Created: 2017-10-09
ISSN: 2447-2816
Appears in Collections:Artigo em periódico indexado (CTAA)

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