Yeast HXK2 gene reverts glucose regulation mutation of penicillin biosynthesis in P. chrysogenum
Braz. j. microbiol
; 45(3): 873-883, July-Sept. 2014. ilus, graf, tab
Artigo
em Inglês
| LILACS
| ID: lil-727016
Biblioteca responsável:
BR1.1
ABSTRACT
The mutant Penicillium chrysogenum strain dogR5, derived from strain AS-P-78, does not respond to glucose regulation of penicillin biosynthesis and β-galactosidase, and is partially deficient in D-glucose phosphorilating activity. We have transformed strain dogR5 with the (hexokinase) hxk2 gene from Saccharomyces cerevisiae. Transformants recovered glucose control of penicillin biosynthesis in different degrees, and acquired a hexokinase (fructose phosphorylating) activity absent in strains AS- P-78 and dogR5. Interestingly, they also recovered glucose regulation of β-galactosidase. On the other hand, glucokinase activity was affected in different ways in the transformants; one of which showed a lower activity than the parental dogR5, but normal glucose regulation of penicillin biosynthesis. Our results show that Penicillium chrysogenum AS-P-78 and dogR5 strains lack hexokinase, and suggest that an enzyme with glucokinase activity is involved in glucose regulation of penicillin biosynthesis and β-galactosidase, thus signaling glucose in both primary and secondary metabolism; however, catalytic and signaling activities seem to be independent.
Texto completo:
Disponível
Coleções:
Bases de dados internacionais
Base de dados:
LILACS
Assunto principal:
Penicilinas
/
Penicillium chrysogenum
/
Regulação Fúngica da Expressão Gênica
/
Proteínas de Saccharomyces cerevisiae
/
Glucose
/
Hexoquinase
Idioma:
Inglês
Revista:
Braz. j. microbiol
Assunto da revista:
Microbiologia
Ano de publicação:
2014
Tipo de documento:
Artigo
País de afiliação:
México
Instituição/País de afiliação:
Universidad Autónoma Metropolitana/MX