5.1.3.37: mannuronan 5-epimerase
This is an abbreviated version!
For detailed information about mannuronan 5-epimerase, go to the full flat file.
Word Map on EC 5.1.3.37
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5.1.3.37
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epimerases
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vinelandii
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azotobacter
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epimerization
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beta-d-mannuronic
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alpha-l-guluronic
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polysaccharide
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guluronic
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mannuronic
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c-5-epimerase
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epimerized
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homopolymeric
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polymannuronate
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laminaria
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analysis
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phaeophyceae
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alginate-producing
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syneresis
- 5.1.3.37
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epimerases
- vinelandii
- azotobacter
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epimerization
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beta-d-mannuronic
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alpha-l-guluronic
- polysaccharide
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guluronic
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mannuronic
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c-5-epimerase
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epimerized
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homopolymeric
- polymannuronate
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laminaria
- analysis
- phaeophyceae
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alginate-producing
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syneresis
Reaction
Synonyms
AlgE1, AlgE2, AlgE3, AlgE4, AlgE5, AlgE6, AlgE7, algG, alginate epimerase, C5-mannuronan epimerase, c5epi, ManC5-E, mannuronan C5-epimerase, MC5E, MEP13, MEP13-C5, MEP18, MEP18-C5, Mep2, MEP2-C5, MEP21, MEP21-C5, MEP25, MEP25-C5, MEP26, MEP26-C5, MEP27, MEP27-C5, MEP28, MEP28-C5, MEP29, MEP29-C5, Mep4, MEP4-C5, Mep6, MEP6-C5, Mep7, MEP7-C5, poly(beta-D-mannuronate) C5 epimerase 4
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Metals Ions
Metals Ions on EC 5.1.3.37 - mannuronan 5-epimerase
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Ca2+
Mg2+
at Ca2+ concentrations lower than optimum, the addition of Sr2+ or Mg2+ has a stimulatory effect, but Mg2+ is not able to substitute for Ca2+ when no calcium is added
Sr2+
additional information
Ca2+
required, optimum concentration 0.8 mM. The Ca2+ requirement of domain AlgE1-1 is much higher (optimum around 3 mM) than that of whole AlgE1, while domain AlgE1-2 needs slightly more Ca2+ than AlgE1 for optimal activity
Ca2+
the epimerization reaction is Ca2+ dependent, and both the A and R modules bind this cation. The R modules appear to reduce the Ca2+ concentration needed for full activity and also stimulate the reaction rate when positioned both N- and C-terminally
Ca2+
required for activity, all the mannuronan C5-epimerases of Azotobacter vinelandii show differences in concentration of calcium ions needed for full activity, overview
Ca2+
required, enhances gelation by 1.7fold following rSjC5-VI activity
may partly substitute for Ca2+. At Ca2+ concentrations lower than optimum, the addition of Sr2+ or Mg21 has a stimulatory effect
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no Ca2+ ions required for activity, and the Ca2+-alginate complex is not a substrate for the enzyme
additional information
no effect by 1 mM of Mg2+, Sr2+, Li+, and Ba2+