A Gram-negative, motile, rod-shaped, psychrophilic and weakly halophilic bacterial strain, SL13

Photobacterium aplysiae sp. nov., a lipolytic marine bacterium isolated from eggs of the sea hare Aplysia kurodai

No abstract

Arylsulfatase from Sphingomonas sp. nov. was purified through ionic exchange chromatography and gel filtration. The molecular weight of the enzyme was estimated to be 64 kDa by SDS-PAGE. The enzyme showed an optimum reaction condition at pH 7.0 and 45•Ž. With the reaction of agar with arylsulfatase in the ratio of 1:10-6 (w/w) for 2 hr at 50•Ž, gel strength of agar was increased to 2.3 fold and 97% (p<0.01) of sulfate in agar was removed. The result suggests that arylsulfatase could be applicable to the production of value-added products such as electrophoretic grade agarose.

In this study, we focused on myomoduline A (MMA) released from the central nervous system of Aplysia kurodai. The primary structure of MMA is Pro-Met-Ser-Met-Leu-Arg-Leu-NH2. This peptide is the same as that of the myomodulin family peptide found in other mollusks. The purified MMA showed a modulating activity of phasic contraction on the anterior byssus retractor muscle (ABRM) of Mytilus edulis. In order to study the relationship between the structure and biological activity of