EC Number   |
Reaction |
Reference |
|---|
   4.2.2.1 | [hyaluronate]n = (4-deoxy-beta-D-gluc-4-enuronosyl)-N-acetyl-D-glucosamine-[hyaluronate]n-m-1 + 2 3-(4-deoxy-beta-D-gluc-4-enuronosyl)-N-acetyl-D-glucosamine + hyaluronate |
- |
- |
| 4.2.2.1 | [hyaluronate]n = (4-deoxy-beta-D-gluc-4-enuronosyl)-N-acetyl-D-glucosamine-[hyaluronate]n-m-1 + 2 3-(4-deoxy-beta-D-gluc-4-enuronosyl)-N-acetyl-D-glucosamine + hyaluronate |
5-step reaction mechanism, catalytic residues are Arg349, His399, Tyr40, residues responsible for substrate binding and translocation of the remaining substrate are Arg243and Asn580, enzyme and acitive site strucure |
655681 |
| 4.2.2.1 | [hyaluronate]n = (4-deoxy-beta-D-gluc-4-enuronosyl)-N-acetyl-D-glucosamine-[hyaluronate]n-m-1 + 2 3-(4-deoxy-beta-D-gluc-4-enuronosyl)-N-acetyl-D-glucosamine + hyaluronate |
active site structure |
665742 |
| 4.2.2.1 | [hyaluronate]n = (4-deoxy-beta-D-gluc-4-enuronosyl)-N-acetyl-D-glucosamine-[hyaluronate]n-m-1 + 2 3-(4-deoxy-beta-D-gluc-4-enuronosyl)-N-acetyl-D-glucosamine + hyaluronate |
active site structure and hydrophobic patch, molecular mechanism, enzyme flexibility and structural requirements |
666077 |
| 4.2.2.1 | [hyaluronate]n = (4-deoxy-beta-D-gluc-4-enuronosyl)-N-acetyl-D-glucosamine-[hyaluronate]n-m-1 + 2 3-(4-deoxy-beta-D-gluc-4-enuronosyl)-N-acetyl-D-glucosamine + hyaluronate |
active site structure and substrate binding of wild-type and mutant enzymes with chondroitin, mode of action |
656185 |
| 4.2.2.1 | [hyaluronate]n = (4-deoxy-beta-D-gluc-4-enuronosyl)-N-acetyl-D-glucosamine-[hyaluronate]n-m-1 + 2 3-(4-deoxy-beta-D-gluc-4-enuronosyl)-N-acetyl-D-glucosamine + hyaluronate |
along with the substrate binding, the phenylhydroxyl hydrogen atom of Tyr408 will transfer to nearby His399 via a near barrierless transition state, which results in a negatively charged Tyr408 and positively charged His399. The Tyr408, rather than the previously proposed His399, acts as the general base for the subsequent beta-elimination reaction. The His399 has the function of neutralizing the C5-carboxyl group, reaction mechanism, overview |
730253 |
| 4.2.2.1 | [hyaluronate]n = (4-deoxy-beta-D-gluc-4-enuronosyl)-N-acetyl-D-glucosamine-[hyaluronate]n-m-1 + 2 3-(4-deoxy-beta-D-gluc-4-enuronosyl)-N-acetyl-D-glucosamine + hyaluronate |
also acts on chondroitin, the product is more systematically known as 3-(4-deoxy-alpha-L-threo-hex-4-enopyranosyluronic acid)-2-acetamido-2-deoxy-D-glucose |
652640, 652762, 654497, 655596, 655682 |
| 4.2.2.1 | [hyaluronate]n = (4-deoxy-beta-D-gluc-4-enuronosyl)-N-acetyl-D-glucosamine-[hyaluronate]n-m-1 + 2 3-(4-deoxy-beta-D-gluc-4-enuronosyl)-N-acetyl-D-glucosamine + hyaluronate |
also acts on chondroitin, the product is more systematically known as 3-(4-deoxy-alpha-L-threo-hex-4-enopyranosyluronic acid)-2-acetamido-2-deoxy-D-glucose, catalytic mechanism |
654042 |
| 4.2.2.1 | [hyaluronate]n = (4-deoxy-beta-D-gluc-4-enuronosyl)-N-acetyl-D-glucosamine-[hyaluronate]n-m-1 + 2 3-(4-deoxy-beta-D-gluc-4-enuronosyl)-N-acetyl-D-glucosamine + hyaluronate |
also acts on chondroitin, the product is more systematically known as 3-(4-deoxy-alpha-L-threo-hex-4-enopyranosyluronic acid)-2-acetamido-2-deoxy-D-glucose, substrate binding site |
655596 |
| 4.2.2.1 | [hyaluronate]n = (4-deoxy-beta-D-gluc-4-enuronosyl)-N-acetyl-D-glucosamine-[hyaluronate]n-m-1 + 2 3-(4-deoxy-beta-D-gluc-4-enuronosyl)-N-acetyl-D-glucosamine + hyaluronate |
Asn349, His399, and Tyr408 are involved in catalysis, flexible, allosteric behavior of the enzyme, mechanism, active site structure and substrate binding and interactions, overview |
656063 |
