Novel Penicillium cellulases for total hydrolysis of lignocellulosics

Kaisa Marjamaa, Karolina Toth, Paul Andrew Bromann, G. Szakács, Kristiina Kruus

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

The (hemi)cellulolytic systems of two novel lignocellulolytic Penicillium strains (Penicillium pulvillorum TUB F-2220 and P. cf. simplicissimum TUB F-2378) have been studied. The cultures of the Penicillium strains were characterized by high cellulase and β-glucosidase as well moderate xylanase activities compared to the Trichoderma reesei reference strains QM 6a and RUTC30 (volumetric or per secreted protein, respectively). Comparison of the novel Penicillium and T. reesei secreted enzyme mixtures in the hydrolysis of (ligno)cellulose substrates showed that the F-2220 enzyme mixture gave higher yields in the hydrolysis of crystalline cellulose (Avicel) and similar yields in hydrolysis of pre-treated spruce and wheat straw than enzyme mixture secreted by the T. reesei reference strain. The sensitivity of the Penicillium cellulase complexes to softwood (spruce) and grass (wheat straw) lignins was lignin and temperature dependent: inhibition of cellulose hydrolysis in the presence of wheat straw lignin was minor at 35. °C while at 45. °C by spruce lignin a clear inhibition was observed. The two main proteins in the F-2220 (hemi)cellulase complex were partially purified and identified by peptide sequence similarity as glycosyl hydrolases (cellobiohydrolases) of families 7 and 6. Adsorption of the GH7 enzyme PpCBH1 on cellulose and lignins was studied showing that the lignin adsorption of the enzyme is temperature and pH dependent. The ppcbh1 coding sequence was obtained using PCR cloning and the translated amino acid sequence of PpCBH1 showed up to 82% amino acid sequence identity to known Penicillium cellobiohydrolases.

Original languageEnglish
Pages (from-to)358-369
Number of pages12
JournalEnzyme and Microbial Technology
Volume52
Issue number6-7
DOIs
Publication statusPublished - May 10 2013

Fingerprint

Cellulases
Lignin
Penicillium
Hydrolysis
Cellulose
Enzymes
Cellulase
Straw
Cellulose 1,4-beta-Cellobiosidase
Triticum
Adsorption
Amino acids
Amino Acid Sequence
Glucosidases
Proteins
Amino Acids
Hydrolases
Trichoderma
Temperature
Softwoods

Keywords

  • Adsorption
  • Cellobiohydrolase
  • Hydrolysis
  • Lignin
  • Lignocellulose
  • Penicillium

ASJC Scopus subject areas

  • Biochemistry
  • Biotechnology
  • Applied Microbiology and Biotechnology

Cite this

Novel Penicillium cellulases for total hydrolysis of lignocellulosics. / Marjamaa, Kaisa; Toth, Karolina; Bromann, Paul Andrew; Szakács, G.; Kruus, Kristiina.

In: Enzyme and Microbial Technology, Vol. 52, No. 6-7, 10.05.2013, p. 358-369.

Research output: Contribution to journalArticle

Marjamaa, Kaisa ; Toth, Karolina ; Bromann, Paul Andrew ; Szakács, G. ; Kruus, Kristiina. / Novel Penicillium cellulases for total hydrolysis of lignocellulosics. In: Enzyme and Microbial Technology. 2013 ; Vol. 52, No. 6-7. pp. 358-369.
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