Research Articles

Three-dimensional structure of cellobiohydrolase II from Trichoderma reesei

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Science  27 Jul 1990:
Vol. 249, Issue 4967, pp. 380-386
DOI: 10.1126/science.2377893


The enzymatic degradation of cellulose is an important process, both ecologically and commercially. The three-dimensional structure of a cellulase, the enzymatic core of CBHII from the fungus Trichoderma reesei reveals an alpha-beta protein with a fold similar to but different from the widely occurring barrel topology first observed in triose phosphate isomerase. The active site of CBHII is located at the carboxyl-terminal end of a parallel beta barrel, in an enclosed tunnel through which the cellulose threads. Two aspartic acid residues, located in the center of the tunnel are the probable catalytic residues.