(1) Pacific Institute of Bioorganic Chemistry, Far-East Branch of RAS, 690022, 159 Prospect 100-letya Vladivostoku, Vladivostok, Russia;(2) N.D. Zelinsky Institute of Organic Chemistry, RAS, 47 Leninsky Prospect, 119991 Moscow, Russia
Abstract:
Specificities of actions of fucoidanases from the marine microorganism Pseudoalteromonas citrea KMM 3296 and the marine mollusk Littorina kurila were studied. The enzymes possess similar specificities and catalyze the cleavage of accessible α-(1→3)-fucoside bonds in fucoidans with highly sulfated α-(1→4; 1→3)-L-fucooligosaccharides. A high degree of sulfation of the fucose residues in fucoidans makes α-(1→3)-L-fucoside bonds inaccessible for the action of the studied enzymes. The maximum degree of cleavage of fucoidan was achieved by the fucoidanase from the marine bacterium Pseudoalteromonas citrea KMM 3296.