Processes for producing fermentation products
The present invention relates to processes for producing fermentation products from starch-containing material, wherein an alpha-amylase and optionally a thermostable protease, pullulanase and/or glucoamylase are present and/or added during liquefaction, wherein a cellulolytic composition is present and/or added during fermentation or simultaneous saccharification and fermentation. The invention also relates to a composition suitable for use in a process of the invention.
1 . A cellulolytic composition comprising:
(a) a beta-glucosidase having an amino acid sequence that is at least 85% identical to the amino acid sequence of SEQ ID NO: 22 and having the substitutions F100D, S283G, N456E and F512Y; and
(b) a cellobiohydrolase I (“CBHI”) having an amino acid sequence that is at least 85% identical to the amino acid sequence of SEQ ID NO: 24; and
(c) a cellobiohydrolase II (“CBHII”) having an amino acid sequence that is at least 85% identical to the amino acid sequence of SEQ ID NO: 25; and
a glucoamylase.
2 . The composition of claim 1 , wherein the composition is derived from a strain of Trichoderma.
3 . The composition of claim 1 , wherein the composition is derived from a strain of Trichoderma reesei.
4 . The composition of claim 1 , wherein the beta-glucosidase has an amino acid sequence that is at least 90% identical to the amino acid sequence of SEQ ID NO: 22.
5 . The composition of claim 1 , wherein the beta-glucosidase has an amino acid sequence that is at least 95% identical to the amino acid sequence of SEQ ID NO: 22.
6 . The composition of claim 1 , further comprising a GH61 polypeptide having cellulolytic enhancing activity.
7 . The composition of claim 6 , wherein the GH61 polypeptide has an amino acid sequence that is at least 85% identical to the amino acid sequence of SEQ ID NO: 23.
8 . The composition of claim 6 , wherein the GH61 polypeptide has an amino acid sequence that is at least 90% identical to the amino acid sequence of SEQ ID NO: 23.
9 . The composition of claim 6 , wherein the GH61 polypeptide has an amino acid sequence that is at least 95% identical to the amino acid sequence of SEQ ID NO: 23.
10 . The composition of claim 1 , wherein the CBHI has an amino acid sequence that is at least 90% identical to the amino acid sequence of SEQ ID NO: 24.
11 . The composition of claim 1 , wherein the CBHI has an amino acid sequence that is at least 95% identical to the amino acid sequence of SEQ ID NO: 24.
12 . The cellulolytic composition of claim 1 , wherein the CBHII has an amino acid sequence that is at least 90% identical to the amino acid sequence of SEQ ID NO: 25.
13 . The cellulolytic composition of claim 1 , wherein the CBHII has an amino acid sequence that is at least 95% identical to the amino acid sequence of SEQ ID NO: 25.
14 . A process for producing ethanol from corn, the process comprising:
(i) liquefying the corn at a temperature above the initial gelatinization temperature using a thermostable alpha-amylase and a thermostable protease;
(ii) saccharifying using a glucoamylase; and
(iii) fermenting with a yeast, wherein a cellulolytic composition is present or added during saccharifying step (ii) and/or fermenting step (iii), wherein the cellulolytic composition comprises:
(a) a beta-glucosidase having an amino acid sequence that is at least 85% identical to the amino acid sequence of SEQ ID NO: 22 and having the substitutions F100D, S283G, N456E and F512Y; and
(b) a cellobiohydrolase I (“CBHI”) having an amino acid sequence that is at least 85% identical to the amino acid sequence of SEQ ID NO: 24; and
(c) a cellobiohydrolase II (“CBHII”) having an amino acid sequence that is at least 85% identical to the amino acid sequence of SEQ ID NO: 25.
15 . The process of claim 14 , wherein the composition is derived from a strain of Trichoderma.
16 . The process of claim 14 , wherein the composition is derived from a strain of Trichoderma reesei.
17 . The process of claim 14 , wherein the beta-glucosidase has an amino acid sequence that is at least 90% identical to the amino acid sequence of SEQ ID NO: 22.
18 . The process of claim 14 , wherein the beta-glucosidase has an amino acid sequence that is at least 95% identical to the amino acid sequence of SEQ ID NO: 22.
19 . The process of claim 14 , wherein the cellulolytic composition further comprises a GH61 polypeptide having cellulolytic enhancing activity.
20 . The process of claim 19 , wherein the GH61 polypeptide has an amino acid sequence that is at least 85% identical to the amino acid sequence of SEQ ID NO: 23.
21 . The process of claim 19 , wherein the GH61 polypeptide has an amino acid sequence that is at least 90% identical to the amino acid sequence of SEQ ID NO: 23.
22 . The process of claim 19 , wherein the GH61 polypeptide has an amino acid sequence that is at least 95% identical to the amino acid sequence of SEQ ID NO: 23.
23 . The process of claim 19 , wherein the CBHI has an amino acid sequence that is at least 90% identical to the amino acid sequence of SEQ ID NO: 24.
24 . The process of claim 19 , wherein the CBHI has an amino acid sequence that is at least 95% identical to the amino acid sequence of SEQ ID NO: 24.
25 . The process of claim 19 , wherein the CBHII has an amino acid sequence that is at least 90% identical to the amino acid sequence of SEQ ID NO: 25.
26 . The process of claim 19 , wherein the CBHII has an amino acid sequence that is at least 95% identical to the amino acid sequence of SEQ ID NO: 25.
27 . The composition of claim 1 , wherein the glucoamylase comprises a blend comprising a Talaromyces emersonii glucoamylase, a Trametes cingulate glucoamylase, and a Rhizomucor pusillus alpha-amylase with Aspergillus niger glucoamylase linker and starch binding domain (SBD).