NOVELTY - A new isolated polypeptide having beta-glucosidase activity comprises: (1) a sequence having at least 85% identity with amino acids 20 to 863 of the 863-amino acid sequence (SEQ ID NO. 2), or its variant; or (2) a sequence encoded by a polynucleotide which hybridizes under at least high stringency conditions with nucleotides 58 to 2580 of the 3060-bp sequence (SEQ ID NO. 1) or its cDNA sequence, or its complement.    USE - The polypeptide having beta-glucosidase activity is useful for degrading cellulose- and hemicellulose-containing biomass (claimed) into monosaccharides, disaccharides and polysaccharides and for producing detergent composition.    DETAILED DESCRIPTION - A new isolated polypeptide having beta-glucosidase activity comprises:    (1) a sequence having at least 85% identity with amino acids 20 to 863 of the 863-amino acid sequence (SEQ ID NO. 2), or its variant comprising conservative substitution, deletion and/or insertion of its one or more amino acids; or    (2) a sequence encoded by a polynucleotide which hybridizes under at least high stringency conditions with nucleotides 58 to 2580 of the 3060-bp sequence (SEQ ID NO. 1) or its cDNA sequence, or its complement.    INDEPENDENT CLAIMS are also included for the following:    (1) an isolated polynucleotide comprising a nucleotide sequence which encodes the polypeptide;    (2) a nucleic acid construct comprising the polynucleotide operably linked to one or more control sequences that direct the production of the polypeptide in an expression host, or a gene encoding a protein operably linked to a nucleotide sequence encoding a signal peptide consisting of nucleotides 1 to 58 of the 3060-bp sequence (SEQ ID NO. 1), where the gene is foreign to the first and second nucleotide sequences;    (3) a recombinant expression vector comprising the nucleic acid construct;    (4) a recombinant host cell comprising the nucleic acid construct;    (5) a method for producing the polypeptide;    (6) a method for producing a mutant of a parent cell;    (7) a method for producing a protein;    (8) an isolated polynucleotide;    (9) a method for producing a polynucleotide having a mutant nucleotide sequence;    (10) a detergent composition comprising the polypeptide and a surfactant;    (11) a transgenic plant, plant part or plant cell, which has been transformed with a polynucleotide encoding the polypeptide; and    (12) a method for degrading cellulose- and hemicellulose-containing biomass.