Characterization of cellulolytic extract from Pycnoporus sanguineus PF-2 and its application in biomass saccharification

Appl Biochem Biotechnol. 2012 Mar;166(6):1586-603. doi: 10.1007/s12010-012-9565-3. Epub 2012 Feb 11.

Abstract

The aim of this work was to evaluate the biochemical features of the white-rot fungi Pycnoporus sanguineus cellulolytic complex and its utilization to sugarcane bagasse hydrolysis. When cultivated under submerged fermentation using corn cobs as carbon source, P. sanguineus produced high FPase, endoglucanase, β-glucosidase, xylanase, mannanase, α-galactosidase, α-arabinofuranosidase, and polygalacturonase activities. Cellulase activities were characterized in relation to pH and temperature. β-Glucosidase and FPase activities were higher at 55 °C, pH 4.5, and endoglucanase activity was higher at 60 °C, in a pH range of 3.5-4.0. All cellulase activities were highly stable at 40 and 50 °C through 48 h of pre-incubation. Crude enzymatic extract from P. sanguineus was applied in a saccharification experiment using acid-treated and alkali-treated sugarcane bagasse as substrate, and the hydrolysis yields were compared to that obtained by a commercial cellulase preparation. Reducing sugar yields of 60.4% and 64.0% were reached when alkali-treated bagasse was hydrolyzed by P. sanguineus extract and commercial cellulase, respectively. Considering the glucose production, it was observed that P. sanguineus extract and commercial cellulase ensured yields of 22.6% and 36.5%, respectively. The saccharification of acid-treated bagasse was lower than that of alkali-treated bagasse regardless of the cellulolytic extract. The present work showed that P. sanguineus has a great potential as an enzyme producer for biomass saccharification.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Biomass*
  • Carbon / chemistry
  • Cellulase / chemistry
  • Cellulases / chemistry*
  • Cellulose / chemistry
  • Enzyme Activation
  • Enzyme Assays
  • Fermentation*
  • Glycoside Hydrolases / chemistry*
  • Hydrogen-Ion Concentration
  • Polygalacturonase / chemistry
  • Pycnoporus / chemistry
  • Pycnoporus / enzymology*
  • Saccharum / chemistry
  • Temperature
  • Zea mays / chemistry
  • alpha-Galactosidase / chemistry
  • beta-Glucosidase / chemistry

Substances

  • Carbon
  • Cellulose
  • bagasse
  • Cellulases
  • Glycoside Hydrolases
  • hemicellulase
  • Polygalacturonase
  • beta-Glucosidase
  • alpha-Galactosidase
  • Cellulase