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The Effects of Vitamin C on Oxidative DNA Damage and Mutagenesis
antigenotoxic potential S. cerevisiae reversion assay yeast comet assay
2009/3/6
DNA damage induced by reactive oxygen species is involved in mutagenesis and generation of mutation-related diseases, including cancer. Therefore, study of antigenotoxic potential of antioxidants is o...
Improvement of the Enzymatic Properties of Kojibiose Phosphorylase from Thermoanaerobacter brockii by Random Mutagenesis and Chimerization
kojibiose phosphorylase random mutagenesis chimerization Thermoanaerobacter brockii
2008/4/20
Random mutagenesis by error-prone PCR was introduced to kojibiose phosphorylase (KP; EC 2.4.1.230) from Thermoanaerobacter brockii ATCC35047. One thermostable mutant and two DP-mutants that were defin...
Improvement of the Thermal Stability of a Calcium-free, Alkaline α-Amylase by Site-directed Mutagenesis
Bacillus alkaliphile α-amylase thermostability site-directed mutagenesis
2008/4/20
Alkaline α-amylase from Bacillus sp. strain KSM-K38 (AmyK38) is a calcium-free enzyme that is stable against chelating and oxidative reagents. Recently, the thermostability of this enzyme was improved...
Creation of a Novel Hydrolase by Site-directed Mutagenesis of Malto-oligosyltrehalose Synthase
trehalose malto-oligosyltrehalose synthase site-directed mutagenesis transglycosylation hydrolysis
2008/4/20
Malto-oligosyltrehalose synthase (EC 5.4.99.15, MTSase) catalyzes the conversion of α-1,4-glucan to glycosyltrehalose by forming an α,α-1,1-glucosidic linkage on the reducing side of the α-1,4-glucan....
Enhancing the Thermal Stability of Sucrose Phosphorylase from Streptococcus mutans by Random Mutagenesis
sucrose phosphorylase Streptococcus mutans random mutagenesis thermostable enzyme
2008/4/20
The thermal stability of sucrose phosphorylase (EC 2.4.1.7) from Streptococcus mutans was enhanced using random and site-directed mutageneses. Random mutagenesis studies revealed that eight single ami...
Mutagenesis and Structural Analysis of Thermoactinomyces vulgaris R-47 α-Amylase II (TVA II)
TVA II subsite substrate recognition α-amylase family
2008/4/20
An α-amylase II (TVA II) produced by Thermoactinomyces vulgaris R-47 exhibits wide substrate specificity for starch, pullulan, cyclodextrins and isopanose. Asp465 and Arg469 are located at subsite (-2...
Site-Directed Mutagenesis of Tryptophan 622 of Thermoactinomyces vulgaris R-47 Glucoamylase:pH Optima and Activities of Five Mutants
glucoamylase optimal pH catalytic base
2008/4/20
In Aspergillus awamori glucoamylase, the optimal pH has been reported to increase to maintain activity by a mutation of Ser411 which forms a hydrogen-bond with a catalytic base (Fang and Ford, Protein...
Use of Chemical Mutagenesis for the Isolation of Food Grade ß-Galactosidase Overproducing Mutants of Bifidobacteria,Lactobacilli and Streptococcus thermophilus
probiotics ß beta -galactosidase mutagenesis
2008/4/1
A classical chemical mutagenesis protocol was evaluated for increasing ß-galactosidase production by probiotic bacteria to improve their potential to treat symptoms of lactose malabsorption in h...