|Superclasses:||Reactions Classified By Conversion Type → Simple Reactions → Chemical Reactions|
|Reactions Classified By Substrate → Small-Molecule Reactions|
EC Number: 18.104.22.168
Enzymes and Genes:
|Archaeoglobus fulgidus 7324 :||cyclodextrin glucanotransferase
|Thermococcus sp. B1001 :||cyclomaltodextrin glucanotransferase
Note that this reaction equation differs from the official Enzyme Commission reaction equation for this EC number, which can be found here .
Reaction Locations: extracellular space
The reaction direction shown, that is, A + B ↔ C + D versus C + D ↔ A + B, is in accordance with the Enzyme Commission system.
Mass balance status: Marked as unbalanced.
Enzyme Commission Primary Name: cyclomaltodextrin glucanotransferase
Enzyme Commission Synonyms: Bacillus macerans amylase, cyclodextrin glucanotransferase, α-cyclodextrin glucanotransferase, α-cyclodextrin glycosyltransferase, β-cyclodextrin glucanotransferase, β-cyclodextrin glycosyltransferase, γ-cyclodextrin glycosyltransferase, cyclodextrin glycosyltransferase, cyclomaltodextrin glucotransferase, cyclomaltodextrin glycosyltransferase, konchizaimu, α-1,4-glucan 4-glycosyltransferase, cyclizing, BMA, CGTase, neutral-cyclodextrin glycosyltransferase, 1,4-α-D-glucan 4-α-D-(1,4-α-D-glucano)-transferase (cyclizing)
Enzyme Commission Summary:
The enzyme cyclizes a part of a (1→4)-α-D-glucan chain by formation of a (1→4)-α-D-glucosidic bond.
Cyclodextrins (Schardinger dextrins) of various sizes (6,7,8, etc. glucose units) are formed reversibly from starch and similar substrates.
Will also disproportionate linear maltodextrins without cyclizing (cf. EC 22.214.171.124, 4-α-glucanotransferase).
Labes07: Labes A, Schonheit P (2007). "Unusual starch degradation pathway via cyclodextrins in the hyperthermophilic sulfate-reducing archaeon Archaeoglobus fulgidus strain 7324." J Bacteriol 189(24);8901-13. PMID: 17921308
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