Activity and conformation of catalase in water-ethanol mixtures

Citation
Pg. Yi et al., Activity and conformation of catalase in water-ethanol mixtures, ACT CHIM S, 58(6), 2000, pp. 652-655
Citations number
11
Categorie Soggetti
Chemistry
Journal title
ACTA CHIMICA SINICA
ISSN journal
05677351 → ACNP
Volume
58
Issue
6
Year of publication
2000
Pages
652 - 655
Database
ISI
SICI code
0567-7351(2000)58:6<652:AACOCI>2.0.ZU;2-Z
Abstract
The activity and conformation changes of catalase in water - ethanol mixtur es were measured at 298.15K by means of microcalorimetry and fluorescence s pectroscopy. The results showed that the Michaelis constant K-m of catalase catalyzed reaction as well as the relative fluorescence intensity of catal ase increased the rate constant k(2) and the activity of catalase decreased with increasing the ethanol concentration. The conformation of catalase wa s changed with losing activity at the various concentration of ethanol. The lose of activity of catalase in water - ethanol mixtures was caused by the inhibition of ethanol and the conformational change of catalase.