Hyaluronan synthases and methods of making and using same
First Claim
1. A functionally active hyaluronan synthase having an altered enzymatic activity as compared to a corresponding functionally active native hyaluronan synthase, wherein the functionally active hyaluronan synthase has at least one modified amino acid residue therein as compared to the corresponding functionally active native hyaluronan synthase.
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Abstract
A functionally active hyaluronan synthase having at least one modified amino acid residue therein as compared to a corresponding functionally active native hyaluronan synthase such that the functionally active hyaluronan synthase has an altered enzymatic activity as compared to the corresponding functionally active native hyaluronan synthase is disclosed. The altered enzymatic activity may result in increased or decreased activity when compared to the corresponding native hyaluronan synthase, or the altered enzymatic activity may result in production of hyaluronan having an average molecular mass that is greater than or less than an average molecular mass of hyaluronan produced by the corresponding native hyaluronan synthase. Methods of producing hyaluronic acid utilizing a recombinant host cell having an expression construct encoding the functionally active hyaluronan synthase with altered enzymatic activity are also disclosed.
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Citations
44 Claims
- 1. A functionally active hyaluronan synthase having an altered enzymatic activity as compared to a corresponding functionally active native hyaluronan synthase, wherein the functionally active hyaluronan synthase has at least one modified amino acid residue therein as compared to the corresponding functionally active native hyaluronan synthase.
- 10. A recombinant host cell having a functionally active hyaluronan synthase having an altered enzymatic activity as compared to a corresponding functionally active native hyaluronan synthase incorporated therein such that the host cell is capable of producing hyaluronan, wherein the functionally active hyaluronan synthase has at least one modified amino acid residue therein as compared to the corresponding functionally active native hyaluronan synthase.
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21. A method of providing a functionally active hyaluronan synthase having an altered enzymatic activity as compared to a corresponding functionally active native hyaluronan synthase, comprising the steps of:
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providing a hyaluronan synthase; and
modifying at least one amino acid residue of the hyaluronan synthase to provide a functionally active hyaluronan synthase having an altered enzymatic activity. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29)
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30. A method for producing hyaluronic acid, comprising the steps of:
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providing a recombinant host cell having at least one expression construct comprising a hyaluronan synthase gene encoding a functionally active hyaluronan synthase incorporated therein such that the host cell is capable of producing hyaluronan, wherein the functionally active hyaluronan synthase has at least one modified amino acid residue therein as compared to a corresponding functionally active native hyaluronan synthase such that the functionally active hyaluronan synthase has an altered enzymatic activity as compared to the corresponding functionally active native hyaluronan synthase; and
culturing the host cell under conditions appropriate for the production of hyaluronic acid. - View Dependent Claims (31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44)
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Specification