NOVELTY - An isolated polypeptide having beta-glucosidase activity, is new. The polypeptide is selected from e.g. a polypeptide having at least 85% sequence identity to the specific mature polypeptide; a polypeptide encoded by a polynucleotide that hybridizes under high stringency conditions with (i) the specific mature polypeptide coding a specific nucleotide sequence, (ii) its cDNA sequence, or (iii) full-length complement of (i) or (ii); and a polypeptide encoded by a polynucleotide having at least 85% sequence identity to the specific mature polypeptide or its cDNA sequence.    USE - For degrading or converting a cellulosic material; fermenting a cellulosic material to produce fermentation product; and for producing a protein (claimed). The fermentation products are alcohol (e.g. arabinitol, n-butanol, isobutanol, ethanol, glycerol, methanol, ethylene glycol, 1,3-propanediol (propylene glycol), butanediol, glycerin, sorbitol, and xylitol); alkane (e.g. pentane, hexane, heptane, octane, nonane, decane, undecane, and dodecane), cycloalkane (e.g. cyclopentane, cyclohexane, cycloheptane, and cyclooctane), alkene (e.g. pentene, hexene, heptene, and octene); amino acid (e.g. aspartic acid, glutamic acid, glycine, lysine, serine, and threonine); gas (e.g. methane, hydrogen, carbon dioxide, and carbon monoxide); ketone (e.g. acetone); organic acid (e.g. acetic acid, formic acid, and succinic acid); and polyketide.    ADVANTAGE - The polypeptide having enhanced beta-glucosidase activity, enhances the hydrolysis of a cellulosic material and simultaneously carries out fermentation.    DETAILED DESCRIPTION - An isolated polypeptide having beta-glucosidase activity, is new. The polypeptide is selected from: a) a polypeptide having at least 85% e.g. at least 86%, at least 87%, at least 88%, at least 89%, at least 90%, at least 91%, at least 92%, at least 93%, at least 94%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99%, and 100% sequence identity to the mature polypeptide of amino acid sequence containing 883 amino acids (SEQ ID NO: 2); b) a polypeptide encoded by a polynucleotide that hybridizes under high stringency conditions or very high stringency conditions with (i) the mature polypeptide coding a nucleotide sequence containing 2793 base pairs (SEQ ID NO: 1), (ii) its cDNA sequence, or (iii) the full-length complement of (i) or (ii); c) a polypeptide encoded by a polynucleotide having at least 85% e.g. at least 86%, at least 87%, at least 88%, at least 89%, at least 90%, at least 91 %, at least 92%, at least 93%, at least 94%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99%, and 100% sequence identity to the mature polypeptide coding sequence of (SEQ ID NO: 1) or its cDNA sequence; d) a variant of the mature polypeptide of (SEQ ID NO: 2) comprising a substitution, deletion, and/or insertion at, at least one position; and e) a fragment of the polypeptide of (a), (b), (c), or (d) that has beta-glucosidase activity. INDEPENDENT CLAIMS are included for the following:    (1) a composition comprising the polypeptide;    (2) an isolated polynucleotide (P1) encoding the polypeptide;    (3) a method of producing the polypeptide;    (4) new transgenic plant, plant part or plant cell transformed with a polynucleotide encoding the polypeptide;    (5) a method of producing a mutant of a parent cell involving inactivating a polynucleotide encoding the polypeptide, which results in the mutant producing less of the polypeptide than the parent cell;    (6) new double-stranded inhibitory RNA (dsRNA) molecule comprising a subsequence of the polynucleotide, where optionally the dsRNA is siRNA or miRNA molecule;    (7) a method of inhibiting the expression of a polypeptide having beta-glucosidase activity in a cell, involving administering to the cell or expressing in the cell the dsRNA molecule;    (8) new isolated polynucleotide (P2) encoding a signal peptide comprising amino acids 1-21 of SEQ ID NO: 2;    (9) a method of producing a protein, involving: cultivating a recombinant host cell comprising a gene encoding a protein operably linked to the polynucleotide (P2), where the gene is foreign to the polynucleotide encoding the signal peptide, under conditions conducive for production of the protein; and recovering the protein;    (10) a method (M1) for degrading or converting a cellulosic material, involving: treating the cellulosic material with an enzyme composition in the presence of the polypeptide having beta-glucosidase activity; and    (11) a method (M2) of fermenting a cellulosic material, involving: fermenting the cellulosic material with at least one fermenting microorganism, where the cellulosic material is saccharified with an enzyme composition in the presence of the polypeptide having beta-glucosidase activity.