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2001 | 48 | 4 | 995-1002
Article title

Influence of Me2SO and incubation time on papain activity studied using fluorogenic substrates.

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Abstracts
EN
Papain activity in a buffer containing Me2SO was studied using fluorogenic substrates. It was found that the number of active sites of papain decreases with increasing Me2SO concentration whereas the incubation time, in a buffer containing 3% Me2SO does not affect the number of active sites. However, an increase of papain incubation time in the buffer with 3% Me2SO decreased the initial rate of hydrolysis of Z-Phe-Arg-Amc as well as Dabcyl-Lys-Phe-Gly-Gly-Ala-Ala-Edans. Moreover, an increase of Me2SO concentration in working buffer decreased the initial rate of papain-catalysed hydrolysis of both substrates. A rapid decrease of the initial rate (by up to 30%) was observed between 1 and 2% Me2SO. Application of the Michaelis-Menten equation revealed that at the higher Me2SO concentrations the apparent values of kcat/Km decreased as a result of Km increase and kcat decrease. However, Me2SO changed the substrate binding process more effectively (Km) than the rate of catalysis kcat..
Publisher

Year
Volume
48
Issue
4
Pages
995-1002
Physical description
Dates
published
2001
received
2001-07-27
revised
2001-09-19
accepted
2001-10-27
Contributors
  • Faculty of Chemistry, University of Gdańsk, Gdańsk, Poland
  • Faculty of Chemistry, University of Gdańsk, Gdańsk, Poland
  • Faculty of Chemistry, University of Gdańsk, Gdańsk, Poland
References
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Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-abpv48i4p995kz
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