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US 12,630,807 B2Granted
Modified transglutaminase
AssigneeAmano Enzyme Inc.
InventorKazunori Yoshida
Life of this patent
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Abstract
An object of the present invention is to find a new mutation effective for improving transglutaminase, and to provide a highly useful modified transglutaminase. Disclosed is a highly useful modified transglutaminase having an amino acid substitution that results in a reduction in temperature stability, an improvement in heat resistance, an improvement in oxidation resistance, an improvement in reactivity, or conversion into deamidase.
Claims9
A modified transglutaminase,
- wherein the modified transglutaminase exhibits a property change corresponding to the an amino acid substitution,
- the property changes due to the amino acid substitution are a reduction in temperature stability and an improvement in oxidation resistance,
- the modified transglutaminase has an amino acid sequence comprising the amino acid sequence of SEQ ID NO:
- 1 with any one of the following amino acid substitutions (1) to (10), or an amino acid sequence showing having 90% or more sequence identity to the amino acid sequence of SEQ ID NO:
- 1 with the amino acid substitutions (1) to (10), provided that a difference in the amino acid sequence occurs at a portion other than the position of the amino acid substitution:
- (1) an amino acid substitution at residue V6, the amino acid after substitution is P;
- (2) an amino acid substitution at residue R26, the amino acid after substitution is K, Q, M, Y, D, G, N, P or H;
- (3) an amino acid substitution at residue E28, the amino acid after substitution is V, R, K, M, N, F, G, L or Y;
- (4) an amino acid substitution at residue Y42, the amino acid after substitution is F, L or M;
- (5) an amino acid substitution at residue E58, the amino acid after substitution is Y, M, A, F, I, V, R, K, L or Q;
- (6) an amino acid substitution at residue V67, the amino acid after substitution is A or S;
- (7) an amino acid substitution at residue T68, the amino acid after substitution is C, L or M;
- (8) an amino acid substitution at residue T77, the amino acid after substitution is C;
- (9) an amino substitution at residue T273, the amino acid after substitution is E;
- and
- (10) an amino acid substitution at residue Y291, the amino acid after substitution is I, L, C, N, S or V.
13 more elements
Dependencies are inferred from the claim text.