|Reaction:||Endohydrolysis of (1→4)-β-D-linkages between D-galactose 4-sulfate and 3,6-anhydro-D-galactose in κ-carrageenans|
|Glossary:||In the field of oligosaccharides derived from agarose, carrageenans, etc., in which alternate residues are 3,6-anhydro sugars, the prefix ’neo’ designates an oligosaccharide whose non-reducing end is the anhydro sugar, and the absence of this prefix means that it is not.
ι-neocarrabiose = 3,6-anhydro-2-O-sulfo-α-D-galactopyranosyl-(1→3)-4-O-sulfo-D-galactose
ι-carrabiose = 4-O-sulfo- β-D-galactopyranosyl-(1→4)-3,6-anhydro-2-O-sulfo-D-galactose
|Other name(s):||κ-carrageenan 4-β-D-glycanohydrolase|
|Systematic name:||κ-carrageenan 4-β-D-glycanohydrolase (configuration-retaining)|
|Comments:||The main products of hydrolysis are neocarrabiose-sulfate and neocarratetraose-sulfate . Unlike EC 22.214.171.124 (ι-carrageenase), but similar to EC 126.96.36.199 (β-agarase), this enzyme proceeds with retention of the anomeric configuration.|