Cellulose binding fusion proteins having a substrate binding region of cellulase
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United States of America Patent
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Apr 13, 1993
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app pub date -
Oct 25, 1990
filing date -
Jul 8, 1988
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Abstract
A fusion protein is prepared containing a polypeptide such as an enzyme and an amino acid sequence having a substrate binding region of a polysaccharidase such as cellulase that has essentially no polysaccharidase activity. By contacting the fusion protein with an affinity matrix containing a substrate such as cellulose for the cellulase substrate binding region, the substrate binding region binds to the affinity matrix to immobilize the polypeptide. The polypeptide can be purified by separating the fusion protein or polypeptide from the affinity matrix. The polypeptide can be separated by cleaving the protein with a Cellulomonas fimi protease.
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