NOVELTY - A host cell (H1) comprising two or more recombinant nucleic acids chosen from (a) nucleotide sequences of SEQ ID NOs: 4, 8, 14, 20, 28, 34, and 38, and (b) nucleic acid encoding polypeptide of SEQ ID NOs: 3, 7, 13, 19, 27, 33 and 37, is new.    USE - The host cell chosen from Escherichia, Pseudomonas, Proteus, Ralstonia, Streptomyces, Staphylococcus, Lactococcus, Bacillus, Saccharomyces cerevisiae, Schizosaccharomyces pombe, Yarrowia lipolytica, Hansenula polymorpha, Kluyveromyces lactis, Pichia pastoris, Aspergillus, Chrysosporium lucknowense and Trichoderma reesei are useful for producing enzyme useful for degrading lignocellulose, preferably cellulose or hemicellulose containing material comprising plant material chosen from Miscanthus, switchgrass, cordgrass, rye grass, reed canary grass, elephant grass, common reed, wheat straw, barley straw, canola straw, oat straw, corn stover, soybean stover, oat hulls, Sorghum, rice hulls, sugarcane bagasse, corn fiber, distillers dried grains with solubles (DDGS), blue stem, corncobs, pine, birch, willow, aspen, poplar wood, and energy cane, converting lignocellulose-containing material to fermentation product, reducing viscosity of pretreated lignocellulose-containing material, converting biomass to fermentation product or fuel and degrading hemicellulose (all claimed).    ADVANTAGE - The host cell enables excellent production of thermostable cellulase and/or hemicellulases.    DETAILED DESCRIPTION - A host cell (H1) comprising two or more recombinant nucleic acids chosen from (a) nucleotide sequences of SEQ ID NOs: 4, 8, 14, 20, 28, 34, and 38, and (b) (i) nucleic acid encoding polypeptide of SEQ ID NO: 3 (Caldicellulosiruptor bescii endoxylanase (cb193)), (ii) nucleic acid encoding polypeptide of SEQ ID NO: 7 (cb195), (iii) nucleic acid encoding polypeptide of SEQ ID NO: 13 (C.bescii alpha -arabinofuranosidase (Cb1172)), (iv) nucleic acid encoding polypeptide of SEQ ID NO: 19 (C.bescii alpha -glucuronidase (cb909)), (v) nucleic acid encoding polypeptide of SEQ ID NO: 27 (C.bescii beta -xylosidase (cb2487)), (vi) nucleic acid encoding polypeptide of SEQ ID NO: 33 (C.bescii acetyl xylan esterase (cb162)), and (vii) nucleic acid encoding polypeptide of SEQ ID NO: 37 (C.bescii endoxylanase (cbl93) lacking signal peptide), is new. Sequences not defined here may be found at ftp://ftp.wipo.int/pub/published_pct_sequences/publication. INDEPENDENT CLAIMS are included for the following:    (1) host cell (H2) comprising one or more recombinant nucleic acids, where the recombinant nucleic acids encode one or more polypeptides chosen from cb1952, cb1953, cb1954, cb1946, cb629 and cb486 polypeptides;    (2) method (M1) for producing one or more cellulases, involves (a) culturing the host cell in culture media under conditions sufficient to support the expression of recombinant nucleic acid(s), and (b) collecting one or more cellulases from media and/or host cell;    (3) composition (C1) comprising the host cell and culture medium;    (4) composition (C2) comprising two or more recombinant proteins chosen from polypeptide sequences of SEQ ID NOs: 3, 7, 13, 19, 27, 33 and 37;    (5) method (M2) for degrading lignocellulose-containing material, involves (a) contacting lignocellulose-containing material with the host cell or the composition, and (b) incubating the host cell or composition and lignocellulose-containing material under conditions that support lignocellulose degradation;    (6) method (M3) of converting lignocellulose-containing material to fermentation product, involves contacting lignocellulose-containing material with the host cell, and culturing the host cell under conditions sufficient to produce fermentation product from lignocellulose-containing material;    (7) method (M4) of reducing viscosity of pretreated lignocellulose-containing material, involves contacting pretreated lignocellulose-containing material with the host cell or the above-mentioned composition;    (8) method (M5) of converting biomass to fermentation product or fuel, involves contacting the biomass with the host cell or the composition to yield sugar solution, and culturing the sugar solution with fermentative microorganism under conditions sufficient to produce fermentation product; and    (9) method (M6) for degrading hemicellulose, involves (a) providing plant material comprising hemicellulose, where the hemicellulose comprises xylose backbone comprising beta -1,4-linkages and one or more functional groups, and (b) treating the hemicellulose with two or more enzymes chosen from polypeptides of SEQ ID NOs: 3, 7, 13, 19, 27, 33, and 37, where the treating cleaves one or more functional groups from xylose backbone to form cleaved hemicellulose.