MODIFIED URICASE AND USES THEREOF
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United States of America Patent
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Issued Date -
Jan 4, 2024
app pub date -
Nov 3, 2021
filing date -
Nov 3, 2020
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Abstract
A modified uricase is described herein, as well as a method of reducing a level of uric acid by contacting a medium with the modified uricase. The modified uricase comprises a uricase polypeptide crosslinked by at least one bifunctional linking moiety that comprises a poly(alkylene glycol) moiety. A molecular weight of the bifunctional linking moiety is from about 1.5 kDa to about 4 kDa, and/or the modified uricase comprises a plurality of polypeptides having the amino acid sequence SEQ ID NO: 2. Further described is a polypeptide having the amino acid sequence SEQ ID NO: 2. A process of preparing the modified uricase is also described, comprising contacting the polypeptide with a crosslinking agent that comprises a poly(alkylene glycol) moiety and at least two aldehyde groups, to obtain a conjugate; and contacting the conjugate with a reducing agent.
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