4.2.2.5: chondroitin AC lyase
This is an abbreviated version!
For detailed information about chondroitin AC lyase, go to the full flat file.
Word Map on EC 4.2.2.5
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4.2.2.5
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glycosaminoglycans
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proteoglycans
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dermatan
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heparan
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hyaluronic
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hyaluronidase
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glucuronic
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heparinum
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flavobacterium
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heparitinase
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6-sulfate
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lyases
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iduronic
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4-sulphate
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glca
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cetylpyridinium
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hexasaccharide
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monosulfated
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cuprolinic
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3hglucosamine
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galactosaminoglycans
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aurescens
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undersulfated
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oversulfated
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keratanase
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35ssulfate
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analysis
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medicine
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synthesis
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trisulfated
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blue-positive
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chondroitin-4-sulfate
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food industry
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cupromeronic
- 4.2.2.5
- glycosaminoglycans
- proteoglycans
- dermatan
- heparan
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hyaluronic
- hyaluronidase
-
glucuronic
- heparinum
- flavobacterium
- heparitinase
- 6-sulfate
- lyases
-
iduronic
-
4-sulphate
-
glca
-
cetylpyridinium
- hexasaccharide
-
monosulfated
-
cuprolinic
-
3hglucosamine
- galactosaminoglycans
- aurescens
-
undersulfated
-
oversulfated
- keratanase
-
35ssulfate
- analysis
- medicine
- synthesis
-
trisulfated
-
blue-positive
- chondroitin-4-sulfate
- food industry
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cupromeronic
Reaction
= n-1 4-deoxy-beta-D-gluc-4-enuronosyl-1,4-beta-D-hexosylamine +
Synonyms
A-Chase, AC I lyase, c-ACI, c-ACII, ChnAC, chon-AC-lyase, ChonAC, chondroitin AC eliminase, chondroitin AC I lyase, Chondroitin AC lyase, chondroitin ACII lyase, chondroitin lyase AC, chondroitin sulfate lyase, chondroitinase, chondroitinase AC, chondroitinase ACI, chondroitinase ACII, ChSase-AC, EC 4.2.99.6, F-Chase, lyase, chondroitin AC, Pedsa_3808, PL8A
ECTree
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Reaction
Reaction on EC 4.2.2.5 - chondroitin AC lyase
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[1,3-beta-D-glucuronic acid-1,4-beta-D-hexosylamine]n = n-1 4-deoxy-beta-D-gluc-4-enuronosyl-1,4-beta-D-hexosylamine + [1,3-beta-D-glucuronic acid-1,4-beta-D-hexosylamine]
[1,3-beta-D-glucuronic acid-1,4-beta-D-hexosylamine]n = n-1 4-deoxy-beta-D-gluc-4-enuronosyl-1,4-beta-D-hexosylamine + [1,3-beta-D-glucuronic acid-1,4-beta-D-hexosylamine]
random attack
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[1,3-beta-D-glucuronic acid-1,4-beta-D-hexosylamine]n = n-1 4-deoxy-beta-D-gluc-4-enuronosyl-1,4-beta-D-hexosylamine + [1,3-beta-D-glucuronic acid-1,4-beta-D-hexosylamine]
stepwise attack
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[1,3-beta-D-glucuronic acid-1,4-beta-D-hexosylamine]n = n-1 4-deoxy-beta-D-gluc-4-enuronosyl-1,4-beta-D-hexosylamine + [1,3-beta-D-glucuronic acid-1,4-beta-D-hexosylamine]
acts on chondroitin 4-sulfate and chondroitin 6-sulfate, but less well on hyaluronate
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[1,3-beta-D-glucuronic acid-1,4-beta-D-hexosylamine]n = n-1 4-deoxy-beta-D-gluc-4-enuronosyl-1,4-beta-D-hexosylamine + [1,3-beta-D-glucuronic acid-1,4-beta-D-hexosylamine]
acts on chondroitin 4-sulfate and chondroitin 6-sulfate, but less well on hyaluronate
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[1,3-beta-D-glucuronic acid-1,4-beta-D-hexosylamine]n = n-1 4-deoxy-beta-D-gluc-4-enuronosyl-1,4-beta-D-hexosylamine + [1,3-beta-D-glucuronic acid-1,4-beta-D-hexosylamine]
acts on chondroitin 4-sulfate and chondroitin 6-sulfate, but less well on hyaluronate
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[1,3-beta-D-glucuronic acid-1,4-beta-D-hexosylamine]n = n-1 4-deoxy-beta-D-gluc-4-enuronosyl-1,4-beta-D-hexosylamine + [1,3-beta-D-glucuronic acid-1,4-beta-D-hexosylamine]
acts on chondroitin 4-sulfate and chondroitin 6-sulfate, but less well on hyaluronate
[1,3-beta-D-glucuronic acid-1,4-beta-D-hexosylamine]n = n-1 4-deoxy-beta-D-gluc-4-enuronosyl-1,4-beta-D-hexosylamine + [1,3-beta-D-glucuronic acid-1,4-beta-D-hexosylamine]
acts on chondroitin 4-sulfate and chondroitin 6-sulfate, but less well on hyaluronate, lytic mechanism with Tyr242 acting as a general base that abstracts the proton from the C5 position of glucuronic acid while Asn183 and His233 neutralize the charge on the glucuronate acidic group, substrate binding site
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[1,3-beta-D-glucuronic acid-1,4-beta-D-hexosylamine]n = n-1 4-deoxy-beta-D-gluc-4-enuronosyl-1,4-beta-D-hexosylamine + [1,3-beta-D-glucuronic acid-1,4-beta-D-hexosylamine]
acts on chondroitin 4-sulfate and chondroitin 6-sulfate, but less well on hyaluronate, mechanism, active site structure, His225, Tyr234, Arg288, and Glu371 form a catalytic tetrad
[1,3-beta-D-glucuronic acid-1,4-beta-D-hexosylamine]n = n-1 4-deoxy-beta-D-gluc-4-enuronosyl-1,4-beta-D-hexosylamine + [1,3-beta-D-glucuronic acid-1,4-beta-D-hexosylamine]
acts on chondroitin 4-sulfate and chondroitin 6-sulfate, but less well on hyaluronate, random endolytic elimination mechanism
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[1,3-beta-D-glucuronic acid-1,4-beta-D-hexosylamine]n = n-1 4-deoxy-beta-D-gluc-4-enuronosyl-1,4-beta-D-hexosylamine + [1,3-beta-D-glucuronic acid-1,4-beta-D-hexosylamine]
acts on chondroitin 4-sulfate and chondroitin 6-sulfate, but less well on hyaluronate, reaction mechanism
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[1,3-beta-D-glucuronic acid-1,4-beta-D-hexosylamine]n = n-1 4-deoxy-beta-D-gluc-4-enuronosyl-1,4-beta-D-hexosylamine + [1,3-beta-D-glucuronic acid-1,4-beta-D-hexosylamine]
acts on chondroitin 4-sulfate and chondroitin 6-sulfate, but less well on hyaluronate, stepwise reaction mechanism
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[1,3-beta-D-glucuronic acid-1,4-beta-D-hexosylamine]n = n-1 4-deoxy-beta-D-gluc-4-enuronosyl-1,4-beta-D-hexosylamine + [1,3-beta-D-glucuronic acid-1,4-beta-D-hexosylamine]
acts on chondroitin 4-sulfate and chondroitin 6-sulfate, but less well on hyaluronate
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