Cellulase enzymes having a modified linker and reduced lignin binding
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United States of America Patent
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Mar 8, 2016
Grant Date -
Sep 2, 2010
app pub date -
Feb 26, 2010
filing date -
Feb 27, 2009
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Abstract
Provided are modified cellulase enzymes exhibiting increase cellulose-hydrolyzing activity in the presence of lignin and/or reduced binding to lignin comprising modified linker peptides comprising one or more amino acid substitutions, insertions, or deletions that result in (a) a decrease in the calculated isoelectric point of the linker peptide and/or (b) an increase in the ratio of threonine:serine in the linker peptide relative to a parental linker peptide from which said modified linker peptide is derived. Also provided are genetic constructs comprising nucleic acid sequences encoding for modified cellulase enzymes, methods for the production of the modified cellulase enzymes from host strains and a process for hydrolyzing cellulose with the modified cellulases in the presence of lignin.
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