Reaction: Endohydrolysis of (1→4)-β-linkages in the backbone of λ-carrageenan, resulting in the tetrasaccharide α-D-Galp2,6S2-(1→3)-β-D-Galp2S-(1→4)-α-D-Galp2,6S2-(1→3)-D-Galp2S
For diagram click here.
Glossary: carrageenan
Other name(s): endo-β-1,4-carrageenose 2,6,2'-trisulfate-hydrolase
Systematic name: endo-(1→4)-β-carrageenose 2,6,2'-trisulfate-hydrolase
Comments: The enzyme from Pseudoalteromonas sp. is specific for λ-carrageenan. ι-Carrageenan (see EC 3.2.1.157, ι-carrageenase), κ-carrageenan (see EC 3.2.1.83, κ-carrageenase), agarose and porphyran are not substrates.
Links to other databases: BRENDA, EXPASY, KEGG, Metacyc, PDB, CAS registry number:
References:
1. Ohta, Y. and Hatada, Y. A novel enzyme, λ-carrageenase, isolated from a deep-sea bacterium. J. Biochem. (Tokyo) 140 (2006) 475-481. [PMID: 16926183]