ENZYME

Home | Contact

A new class EC 7, Translocases, has been added to the EC list. It will be part of ENZYME from release 2018_10. Read more about EC 7 here.

ENZYME entry: EC 4.2.2.13

Accepted Name
Exo-(1->4)-alpha-D-glucan lyase.
Alternative Name(s)
Alpha-1,4-glucan 1,5-anhydro-D-fructose eliminase.
Alpha-1,4-glucan exo-lyase.
Alpha-1,4-glucan lyase.
Exo-(1,4)-alpha-D-glucan lyase.
Exo-alpha-1,4-glucan lyase.
Reaction catalysed
Linear alpha-glucan <=> (n-1) 1,5-anhydro-D-fructose + D-glucose
Comment(s)
Catalyzes 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. Does not degrade (1->6)-alpha-gucosidic 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, EC 4.2.1.111 and EC 5.3.2.7.
Cross-references
BRENDA	4.2.2.13
EC2PDB	4.2.2.13
ExplorEnz	4.2.2.13
PRIAM enzyme-specific profiles	4.2.2.13
KEGG Ligand Database for Enzyme Nomenclature	4.2.2.13
IUBMB Enzyme Nomenclature	4.2.2.13
IntEnz	4.2.2.13
MEDLINE	Find literature relating to 4.2.2.13
MetaCyc	4.2.2.13