Gene cloning, purification, and characterization of a heat-stable phytase from the fungus Aspergillus fumigatus.
AUTOR(ES)
Pasamontes, L
RESUMO
The finding of heat-stable enzymes or the engineering of moderately thermostable enzymes into more stable ones by random or site-directed mutagenesis has become a main priority of modern biotechnology. We report here for the first time a heat-stable phytase able to withstand temperatures up to 100 degrees C over a period of 20 min, with a loss of only 10% of the initial enzymatic activity. The gene (phyA) encoding this heat-stable enzyme has been cloned from Aspergillus fumigatus and overexpressed in Aspergillus niger. The enzyme showed high activity with 4-nitrophenyl phosphate at a pH range of 3 to 5 and with phytic acid at a pH range of 2.5 to 7.5.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=168464Documentos Relacionados
- Purification and characterization of heat-stable enterotoxin from bovine enterotoxigenic Escherichia coli.
- Purification and characterization of Escherichia coli heat-stable enterotoxin II.
- Purification and partial characterization of heat-stable enterotoxin of enterotoxigenic Escherichia coli.
- Gene Cloning, Purification, and Characterization of a Phosphodiesterase from Delftia acidovorans
- Purification and characterization of Vibrio cholerae non-O1 heat-stable enterotoxin.
