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Although cellulases have been isolated from various microorganisms, no functional cellulase gene has been reported in the Vibrio genus until now. In this report, a novel endo-beta-1,4-glucanase gene, cel5A, 1,362 bp in length, was cloned from a newly isolated bacterium, Vibrio sp. G21. The deduced protein of cel5A contains a catalytic domain of glycosyl(More)
An extended enzymatic hydrolysis of cotton fibers by crude cellulase from Trichoderma pseudokoningii S-38 is described with characterization of both the enzyme changes of activities and cellulose structure. The hydrolysis rates declined drastically during the early stage and then slowly and steadily throughout the whole hydrolysis process the same trend(More)
Marine organisms are potentially an untapped source of drugs and value-added food production. Currently, Acetes chinensis is an underutilized shrimp species with low commercial value from the Bo Hai Gulf of China. In this paper, the shrimp was digested by a crude protease from Bacillus sp. SM98011 and filtered through a 3 kDa ultrafiltration membrane.(More)
In this study, poly(styrene sulfonic acid) sodium salt/single-wall carbon nanotube film was cast onto the surface of glassy carbon electrode and the electrochemical behavior of the modified electrode was investigated. The results show that the anodic peak current is proportional to the concentration of dopamine in the range of 1.6 x 10(-8)-6 x 10(-4) M. The(More)
The biosorption behaviors and mechanisms of a novel exopolysaccharide (EPS), which is secreted by a mesophilic bacterium (namely Wangia profunda (SM-A87)) isolated from deep-sea sediment, for heavy metals Cu(II) and Cd(II) have been studied in this paper. The effects of SM-A87 EPS concentration, solution pH and ionic strength on the metal uptake were(More)
A homogeneous cellulose-binding module (CBM) of cellobiohydrolase I (CBHI) from Trichoderma pseudokoningii S-38 was obtained by the limited proteolysis with papain and a series of chromatographs filtration. Analysis of FT-IR spectra demonstrated that the structural changes result from a weakening and splitting of the hydrogen bond network in cellulose by(More)
MCP-01, the main protease secreted by the deep-sea cold-adapted bacterium Pseudoalteromonas sp. SM9913, is a cold-adapted serine protease. Gene mcp01 encoding MCP-01 contains an ORF of 2508 bp encoding a protein of 835 amino acid residues with an M(r) of 87 773 Da, which is a multidomain subtilase precursor. Mature MCP-01 purified from the culture of strain(More)
Pseudoalteromonas sp. SM9913 is a psychrotolerant bacterium isolated from deep-sea sediment. The structural characterization and ecological roles of the exopolysaccharide (EPS) secreted by this strain were studied in this work. The yield of the EPS increased as the culture temperature decreased in the range 30-10 degrees C, and it reached 5.25 g l(-1) (dry(More)