Ekaterina A Vavilova

Learn More
The gene egl3 of the filamentous fungus Penicillium canescens endo-1,4-β-glucanase, belonging to family 12 glycosyl hydrolases, was cloned and sequenced. The gene was expressed in P. canescens under the control of the strong promoter of gene bgaS, coding for β-galactosidase of this fungus, and efficient endoglucanase producer strains were obtained. The(More)
The gene xylE encoding endo-1,4-β-xylanase from the 10th family of glycosyl hydrolases produced by the mycelial fungus Penicillium canescens has been expressed under the control of the strong promoter of the bgaS gene encoding β-galactosidase from P. canescens. As a result, a strain-producer of endoxylanase XylE was developed. The recombinant enzyme was(More)
The complete gene xylA that encodes endo-1,4-β-xylanase secreted byPenicillium canescens was cloned and sequenced. The coding region of the gene is separated by eight introns. The protein comprises 302 amino acids of the mature protein and 25 amino acids of the signal peptide. The xylanase of P. canescens belongs to the glycosyl hydrolase family 10.(More)
The fungus Penicillium canescens strain F178 (VKPM) and its niaD – mutant exhibited an increased capability of synthesizing extracellular enzymes β-galactosidase (50–60 U/ml) and xylanase (100 U/ml). The synthesis was induced by arabinose and its catabolite, arabitol. A deficiency in arabitol dehydrogenase, leading to arabitol accumulation in the cell, was(More)
The induction of the synthesis of secreted enzymes endo-1,4-beta-xylanase (EC 3.2.1.8) and beta-galactosidase (EC 3.2.1.23) in the original and recombinant Penicillium canescens strains has been studied. In all producer strains, the synthesis of these enzymes was induced by arabinose and its metabolite arabitol. The two enzymes differed in the concentration(More)
The F178 strain of Penicillium canescens is a natural producer of beta-galactosidase and endo-1,4-beta-xylanase. Transcription of the genes bgaS and xylA encoding these proteins is affected by the carbon catabolite repression, which occurs in the filamentous fungi, primarily by the transcriptional repressor CreA. The creA gene of P. canescens was cloned and(More)
Gene egl2 of secreted endo-(1–4)-β-glucanase of glycosyl hydrolase family 5 of the mycelial fungus Penicillium canescens was cloned. The gene was expressed in P. canescens under control of a strong promoter of the bgaS gene encoding β-galactosidase of P. canescens, and endoglucanase producing strains were obtained. Chromatographically purified recombinant(More)
Pectin lyase A (molecular weight 38 kD by SDS-PAGE, pI 6.7) was purified to homogeneity from culture broth of the myoelial fungus Penicillium canescens using chromatographic techniques. During genomic library screening, the gene encoding pectin lyase A from P. canescens (pelA) was isolated and sequenced, and the amino acid sequence was generated by applying(More)
A fragment of Penicillium canescens genomic DNA carrying the xlnR gene coding for a translational activator of xylanolytic genes was isolated. It was demonstrated that a loss of this function in genetically modified transformants resulted in a drastic decrease in the production of P. canescens major xylanases and had a negative effect on the syntheses of(More)
A heterologous protein expression in the fungus Penicillium canescens is described for the first time. The fungal strains producing Trametes hirsuta 072 accase under control of a highly efficient promoter of the P. canescens gene bgaS has been constructed. These strains efficiently transcribe the T. hirsuta 072 laccase gene with a correct intron splicing.(More)