Identification, heterologous expression and characterization of a novel glycoside hydrolase family 30 xylanase from the fungus Penicillium purpurogenum

Karina Espinoza, Jaime Eyzaguirre

Resultado de la investigación: Contribución a una revistaArtículorevisión exhaustiva

15 Citas (Scopus)

Resumen

Penicillium purpurogenum grows on a variety of natural carbon sources and secretes to the medium a large number of enzymes that degrade the polysaccharides present in lignocellulose. In this work, the gene coding for a novel xylanase (XynC) belonging to family 30 of the glycoside hydrolases (GH), has been identified in the genome of the fungus. The enzyme has been expressed in Pichia pastoris and characterized. The mature XynC has 454 amino acid residues and a calculated molecular weight of 49 240. The purified protein shows a molecular weight of 67 000, and it is partially deglycosylated using EndoH. Its pH optimum is in the range of 3–5, and the optimal temperature is 45 °C. It is active on both arabinoxylan and glucuronoxylan, similarly to other fungal GH 30 xylanases. It liberates a set of oligosaccharides, which have been detected by thin-layer chromatography, thus indicating that it is an endo-acting xylanase. It hydrolyzes xylooligosaccharides, releasing mainly xylobiose, in contrast to other fungal GH family 30 enzymes which generate chiefly xylose. Highest sequence identity to a characterized family 30 xylanase is found with the enzyme from the fungus Bispora sp (53%). This is the first GH 30 xylanase described from a Penicillium.

Idioma originalInglés
Páginas (desde-hasta)45-50
Número de páginas6
PublicaciónCarbohydrate Research
Volumen468
DOI
EstadoPublicada - 1 oct. 2018

Áreas temáticas de ASJC Scopus

  • Química analítica
  • Bioquímica
  • Química orgánica

Huella

Profundice en los temas de investigación de 'Identification, heterologous expression and characterization of a novel glycoside hydrolase family 30 xylanase from the fungus Penicillium purpurogenum'. En conjunto forman una huella única.

Citar esto