| abstract |
A novel thermostable β-xylosidase exhibiting hydrolysis activity using PNPX as a substrate under the conditions of at least 105 ° C. and pH 5.0, a polynucleotide encoding the thermostable β-xylosidase, and the thermostable β-xylosidase An expression vector for expressing, a transformant in which the expression vector is incorporated, and a method for producing a lignocellulose degradation product using the thermostable β-xylosidase. A polypeptide comprising an amino acid sequence represented by a specific amino acid sequence or another specific amino acid sequence, wherein one or several amino acids of the above specific or other specific amino acid sequences are deleted or substituted Alternatively, a thermostable β-xylosidase which is a polypeptide comprising an added amino acid sequence, or a polypeptide comprising an amino acid sequence having 75% or more sequence identity with the above-mentioned specific or other specific amino acid sequence. [Selection figure] None |