Production and characterization of cellulase-free xylanase from Trichoderma inhamatum.
The production of extracellular cellulase-free xylanase from Trichoderma inhamatum was evaluated in liquid Vogel medium with different carbon sources as natural substrates and agricultural or agro-industrial wastes. Optimal production of 244.02 U/mL was obtained with xylan as carbon source, pH 6.0 at 25 degrees C, 120 rpm, and 60-h time culture. Optimal conditions for enzyme activity were 50 degrees C and pH 5.5. Thermal stability of T. inhamatum xylanolytic complex expressed as T1/2 was 2.2 h at 40 degrees C and 2 min at 50 degrees C. The pH stability was high from 4.0 to 11.0. These results indicate possible employment of such enzymatic complex in some industrial processes which require activity in acid pH, wide-ranging pH stability, and cellulase activity absence.
de Oliveira da Silva
Leonor Alves
LA
Biochemistry and Microbiology Department, Bioscience Institute, São Paulo State University, UNESP, Av: 24A, 1515, P.O. Box 199, CEP 13.506-900 Rio Claro, SP, Brazil.
Carmona
Eleonora Cano
EC
D002480:Cellulase / Q000172:deficiency; D043364:Endo-1,4-beta Xylanases / Q000096:biosynthesis / Q000378:metabolism*; D004795:Enzyme Stability; D006863:Hydrogen-Ion Concentration; D013696:Temperature; D014242:Trichoderma / Q000201:enzymology*; D043325:Xylan Endo-1,3-beta-Xylosidase; D014990:Xylans / Q000378:metabolism
D014990:Xylans; D043325:Xylan Endo-1,3-beta-Xylosidase; D002480:Cellulase; D043364:Endo-1,4-beta Xylanases