Thermophilic and thermoacidophilic biopolymer-degrading genes and enzymes from
Isolated and/or purified polypeptides and nucleic acid sequences encoding polypeptides from Alicyclobacillus acidocaldarius are provided. Further provided are methods of at least partially degrading, cleaving, or removing polysaccharides, lignocellulose, cellulose, hemicellulose, lignin, starch, chitin, polyhydroxybutyrate, heteroxylans, glycosides, xylan-, glucan-, galactan-, or mannan-decorating groups using isolated and/or purified polypeptides and nucleic acid sequences encoding polypeptides from Alicyclobacillus acidocaldarius.
1. An isolated nucleotide sequence comprising a nucleic acid sequence encoding a polypeptide selected from the group consisting of polypeptides having at least 90% sequence identity to SEQ ID NO:337, wherein the polypeptide exhibits activity as an α-glucuronidase.
2. The isolated nucleotide sequence of claim 1 , wherein the polypeptide has enzymatic activity at or below a pH of about 9.
3. The isolated nucleotide sequence of claim 1 , wherein the polypeptide has enzymatic activity at a temperature at or above about 50 degrees Celsius.
4. The isolated nucleotide sequence of claim 1 , wherein the nucleic acid sequence is present in a vector.
5. An isolated polypeptide comprising a polypeptide selected from the group consisting of polypeptides having at least 90% sequence identity to SEQ ID NO:337, wherein the polypeptide exhibits activity as an α-glucuronidase.
6. The isolated polypeptide of claim 5 , wherein the polypeptide has α-glucuronidase activity at or below about pH 9.
7. The isolated polypeptide of claim 5 , wherein the polypeptide has α-glucuronidase activity at a temperature at or above about 50 degrees Celsius.
8. The isolated polypeptide of claim 5 , wherein the polypeptide is glycosylated, pegylated, or otherwise post-translationally modified.
9. A method of at least partially degrading, cleaving, or removing polysaccharides, lignocellulose, hemicellulose, or heteroxylan, the method comprising:
placing the polypeptide of claim 5 in fluid contact with a polysaccharide, lignocellulose, hemicellulose, or heteroxylan.
10. The method according to claim 9 , wherein placing the polypeptide of claim 5 in fluid contact with a polysaccharide, lignocellulose, hemicellulose, or heteroxylan occurs at or below about pH 7.
11. The method according to claim 9 , wherein placing the polypeptide of claim 5 in fluid contact with a polysaccharide, lignocellulose, hemicellulose, or heteroxylan occurs at a temperature at or above 50 degrees Celsius.
12. The method according to claim 9 , wherein the polypeptide is glycosylated, pegylated, or otherwise post-translationally modified.