Abstract
The ethanol effect on the Trichoderma reesei cellulases was studied to quantify and clarify this inhibition type. To determine inhibition parameters of crude cellulase and purified exoglucanase Cel7A, integrated Michaelis-Menten equations were used assuming the presence of two inhibitors: cellobiose as the reaction product and ethanol as a possible bioproduct of cellulose fermentation.
It was found that hydrolysis of cellulose by crude enzyme follows a model that considers noncompetitive inhibition by ethanol, whereas Cel7A is very slightly competitively inhibited. Crude cellulase is much more inhibited (K iul=K icl=151.9 mM) than exoglucanase Cel7A (K icl=1.6 × 1015 mM). Also, calculated inhibition constants showed that cellobiose inhibition is more potent than ethanol inhibition both for the crude enzyme as well as exoglucanase Cel7A.
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Pettersson, P. O., Eklund, R., and Zacchi, G. (2002), Appl. Biochem. Biotechnol. 98–100, 733–746.
Sun, Y. and Cheng, J. (2004), Biotechnol. Prog. 20, 698–705.
Eriksson, T., Karlsson, J., and Tjerneld, F. A. (2002), Appl. Biochem. Biotech. 101, 41–60.
Rabinovich, M. L., Melnick, M. S., and Bolovova, A. V. (2002) Appl. Biochem. Microbiol. 38, 305–321.
Ooshima, H., Ishitani, Y., and Harano, Y. (1985), Biotechnol. Bioeng. 27, 389–397.
Holtzapple, M., Cognata, M., Shu, Y., and Hendrickson, C. (1990), Biotechnol. Bioeng. 36, 275–287.
Kennedy, J. F. and Cabral, J. M. S. (1987), in Biotechnology, vol. 7a (Rehm, H. J. and Reed, G., eds.), pp. 253–391.
Caldini, C., Bonomi, F., Pifferi, P. G., Lanzarini, G., and Galante, Y. M. (1994), Enzyme Microb. Technol. 16, 286–291.
Takagi, M. (1984), Biotechnol. Bioeng. XXVI, 1506–1507.
Wu, Z. and Lee, Y. Y. (1997), Biotechnol. Lett. 19, 977–979.
Orsi, B. A. and Tipton, K. F. (1979), Methods Enzymol. 63, 159–183.
Duggleby, R. G. (1986), Biochem. J. 235, 613–615.
Howell, J. A. and Stuck, J. D. (1975), Biotechnol. Bioeng. 17, 873–893.
Hsu, T.-A. and Tsao, G. T. (1979), Biotechnol. Bioeng. 21, 2235–2246.
Hsu, T.-A., Gong, C.-S., and Tsao, G. T. (1980), Biotechnol. Bioeng. 12, 2305–2320.
Pereira, A. N. (1987), PhD Thesis, Purdue University, West Lafayette, IN.
Nidetzky, B., Hayn, M., Macarron, R., and Steiner, W. (1993), Biotechnol. Lett. 15, 71–76.
Bezerra, R. M. F. and Dias, A. A. (2004) Appl. Biochem. Biotechnol. 112, 173–184.
Jones, E. and Weatherley, L. R. (2003), J. Chem. Technol. Biotechnol. 78, 194–198.
Foster, R. J. and Niemann, C. (1955), J. Am. Chem. Soc. 77, 1886–1892.
Philo, R. D. and Selwyn, M. J. (1973) Biochem. J. 135, 525–530.
Wood, T. M. and Bhat, K. M. (1988), Methods Enzymol. 160, 87–113.
Bezerra, R. M. F. (1999) J. Med. Biochem. 3, 9–16.
Hsu, T.-A. (1979), PhD Thesis, Purdue University, West Lafayette, IN.
Mannervik, B. (1982), Methods Enzymol. 87C, 370–391.
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Bezerra, R.M.F., Dias, A.A. Enzymatic kinetic of cellulose hydrolysis. Appl Biochem Biotechnol 126, 49–59 (2005). https://doi.org/10.1007/s12010-005-0005-5
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DOI: https://doi.org/10.1007/s12010-005-0005-5