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Surface hydrophobic amino acid residues in cellulase molecules as a structural factor responsible for their high denim-washing performanceстатья
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
- Авторы: Gusakov A.V., Sinitsyn A.P., Berlin A.G., Markov A.V., Ankudimova N.V.
- Журнал: Enzyme and Microbial Technology
- Том: 27
- Номер: 9
- Год издания: 2000
- Издательство: Elsevier BV
- Местоположение издательства: Netherlands
- Первая страница: 664
- Последняя страница: 671
- DOI: 10.1016/S0141-0229(00)00264-7
- Аннотация: The denim-washing performance of six purified fungal cellulases (four endo-1,4-beta -D-glucanases and two cellobiohydrolases) was compared using a model microassay. The performance of cellobiohydrolases per mg of protein was much lower than that of endoglucanases. For endoglucanases, it varied up to 5 times between the best and the worst enzyme. Experiments with amino acids immobilized on cross-linked agarose showed that their side chains may bind indigo owing to hydrophobic interactions and formation of hydrogen bonds. The best binding effects provided Tyr and Phe. Analysis of three-dimensional structures of cellulase molecules showed that a certain correlation exists between the washing performance of enzyme and (i) quantity (percentage) of aromatic residues exposed to solvent on the surface of protein globule or (ii) overall percentage of the surface hydrophobic residues. Data presented provide an evidence that the molecules of certain cellulases, which have hydrophobic domains (clusters of closely located non-polar residues) on their surface, may bind indigo and thus act as emulsifiers helping the dye to float out of cellulose fibers to the bulk solution. (C) 2000 Elsevier Science Inc. All rights reserved.
- Добавил в систему: Гусаков Александр Васильевич