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Water-soluble linear sulfated galactans from red seaweeds. They consist of repeating disaccharide units with alternating 3-linked β−d-galactopyranose and 4-linked α-galactopyranose or 3, 6-anhydro- α-galactopyranose. Between the units are α-1,3 glycosidic bonds. kappa, iota, and lambda carrageenan are three main types based on the number of sulfate groups on the repeating disaccharide units.

Li, J., He, Z., Liang, Y., Peng, T. and Hu, Z., 2022. Insights into Algal Polysaccharides: A Review of Their Structure, Depolymerases, and Metabolic Pathways. Journal of Agricultural and Food Chemistry, 70(6), pp .1749-1765. Click here to redirect detail information.
Zia, K. M., Tabasum, S., Nasif, M., Sultan, N., Aslam, N., Noreen, A., & Zuber, M. (2017). A review on synthesis, properties and applications of natural polymer based carrageenan blends and composites. International journal of biological macromolecules, 96, 282–301. Click here to redirect detail information.

CAZyme Gene Cluster:
Substrate Genome_ID CGC_ID CGC_Content Species Name
carrageenan MGYG000001507 MGYG000001507_1|CGC58
Paenibacillus ihuae
carrageenan MGYG000001525 MGYG000001525_20|CGC32
Paenibacillus_A rubinfantis

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