Three cellulases from Melanocarpus albomyces for textile treatment at neutral pH

Arja Miettinen-Oinonen (Corresponding Author), John Londesborough, Vesa Joutsjoki, Raija Lantto, Jari Vehmaanperä

    Research output: Contribution to journalArticleScientificpeer-review

    87 Citations (Scopus)

    Abstract

    Culture supernatants from strains of Melanocarpus albomyces, Myceliophthora thermophila, Chaetomium thermophilum, and Sporotrichum thermophilum were tested for their ability to release dye in neutral pH conditions from indigo-dyed cotton-containing fabric in biostoning applications. The supernatants from M. albomyces worked well in biostoning, with low backstaining. Three cellulases were purified to homogeneity from the culture medium of this species. Two of the cellulases were endoglucanases with apparent molecular masses of 20 and 50 kDa. The 20 kDa endoglucanase was a relatively heat-stable cellulase with high pH optimum. The partially purified enzyme crystallized spontaneously at pH 4.0 and 7 °C. The 50 kDa endoglucanase also had activity against 4-methylumbelliferyl-β-d-lactoside (MUL) and was active over a wide range of pH values. The third purified cellulase was the 50 kDa cellobiohydrolase with low MUL activity at acidic pH and detectable activity towards filter paper and acid swollen Solca Floc-cellulose, but no endoglucanase activity. The purified 20 kDa endoglucanase performed well in biostoning of denim fabric at neutral pH. Addition of the purified 50 kDa endoglucanase or the 50 kDa cellobiohydrolase to the 20 kDa endoglucanase decreased backstaining in biostoning.
    Original languageEnglish
    Pages (from-to)332 - 341
    Number of pages10
    JournalEnzyme and Microbial Technology
    Volume34
    Issue number3-4
    DOIs
    Publication statusPublished - 2004
    MoE publication typeA1 Journal article-refereed

    Keywords

    • Melanocarpus albomyces
    • Textile treatment
    • Neutral cellulase

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