Addition of substrate-binding domains increases substrate-binding capacity and specific activity of a chitinase from Trichoderma harzianum

M. Carmen Limón, Emilio Margolles-Clark, Tahía Benítez, Merja Penttilä

Research output: Contribution to journalArticleScientificpeer-review

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Chitinase Chit42 from Trichoderma harzianum CECT 2413 is considered to play an important role in the biocontrol activity of this fungus against plant pathogens. Chit42 lacks a chitin-binding domain (ChBD). We have produced hybrid chitinases with stronger chitin-binding capacity by fusing to Chit42 a ChBD from Nicotiana tabacum ChiA chitinase and the cellulose-binding domain from cellobiohydrolase II of Trichoderma reesei. The chimeric chitinases had similar activities towards soluble substrate but higher hydrolytic activity than the native chitinase on high molecular mass insoluble substrates such as ground chitin or chitin-rich fungal cell walls.

Original languageEnglish
Pages (from-to)57-63
Number of pages7
JournalFEMS Microbiology Letters
Issue number1
Publication statusPublished - 20 Apr 2001
MoE publication typeA1 Journal article-refereed



  • Cellulose-binding domain
  • Chitin-binding domain
  • Chitinase
  • Enzyme engineering
  • Trichoderma harzianum

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