4.2.2.13: exo-(1->4)-alpha-D-glucan lyase

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For detailed information about exo-(1->4)-alpha-D-glucan lyase, go to the full flat file.

Reaction

Synonyms

(1,4)-alpha-D-glucan exo-4-lyase (1,5-anhydro-D-fructose-forming), Ag111, alpha-(1,4)-Glucan 1,5-anhydro-D-fructose eliminase, alpha-1,4-Glucan exo-lyase, alpha-1,4-Glucan lyase, alpha-1,4-glucan lyase isozyme 1, Dehydratase, alpha-1,4-glucan, exo-(1,4)-alpha-D-glucan lyase, Exo-alpha-1,4-glucan lyase, GLase

ECTree

     4 Lyases

         4.2 Carbon-oxygen lyases

             4.2.2 Acting on polysaccharides

                4.2.2.13 exo-(1->4)-alpha-D-glucan lyase

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Results	in table
8	AA Sequence
1	CAS Registry Number
1	Cloned(Commentary)
2	Crystallization (Commentary)
5	General Stability
20	Inhibitors
4	Ki Value [mM]
23	KM Value [mM]
1	Localization
1	Metals/Ions
5	Molecular Weight [Da]
5	Natural Substrates/ Products (Substrates)
16	Organism
1	Pathway
20	PDB ID
5	pH Optimum
3	pH Range
2	Posttranslational Modification
6	Purification (Commentary)
2	Reaction
4	Reaction Type
16	Reference
1	Specific Activity [micromol/min/mg]
2	Storage Stability
59	Substrates and Products (Substrate)
2	Subunits
13	Synonyms
1	Systematic Name
7	Temperature Optimum [°C]
5	Temperature Range [°C]
2	Temperature Stability [°C]
16	Turnover Number [1/s]

Systematic Name

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Systematic Name on EC 4.2.2.13 - exo-(1->4)-alpha-D-glucan lyase

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SYSTEMATIC NAME

IUBMB Comments

(1->4)-alpha-D-glucan exo-4-lyase (1,5-anhydro-D-fructose-forming)

The enzyme catalyses the sequential degradation of (1->4)-alpha-D-glucans from the non-reducing end with the release of 1,5-anhydro-D-fructose. Thus, for an alpha-glucan containing n (1->4)-linked glucose units, the final products are 1 glucose plus (n-1) 1,5-anhydro-D-fructose. Maltose, maltosaccharides and amylose are all completely degraded. It does not degrade (1->6)-alpha-glucosidic bonds and thus the degradation of a branched glucan, such as amylopectin or glycogen, will result in the formation of 1,5-anhydro-D-fructose plus a limit dextrin. Other enzymes involved in the anhydrofructose pathway are EC 4.2.1.110 (aldos-2-ulose dehydratase), EC 4.2.1.111 (1,5-anhydro-D-fructose dehydratase) and EC 5.3.2.7 (ascopyrone tautomerase).