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PURPOSE Renal fibrosis characterized by accumulation of extracellular matrix protein results in chronic renal diseases including diabetic nephropathy. Transforming growth factor β1 (TGF-β1) signaling pathway plays a key role in mediating renal fibrosis. Hence, agents that antagonize TGF-β signaling could be candidate for kidney disease therapy. METHODS We(More)
Pleurotus ferulae is a mushroom typically found in arid steppe that is distributed widely in the Junggar Basin of Xinjiang, China. In this work, laccase production by P. ferulae JM30X was optimized in terms of medium composition and culture conditions. After optimization, the highest laccase activity obtained was 6,832.86 U/L. A single isozyme with a(More)
Hirudin is the most potent non-covalent inhibitor of thrombin. Several expression systems have been used to produce recombinant hirudin for pharmaceutical purposes. However, high expression of active hirudin in Escherichia coli cytoplasm has not been successful owing to the fact that heterogenetic small peptide is easily degraded in the cell. To solve this(More)
We investigated the relationship between monosaccharide composition of Ganoderma lucidum exopolysaccharide (EPS) and activities of EPS synthesis enzymes under various culture temperatures and initial pH values. The mole percentages of three major EPS monosaccharides, glucose, galactose and mannose, varied depending on culture conditions and the resulting(More)
To produce recombinant phospholipase A(1) (PLA(1)) by Escherichian coli, the pla gene encoding PLA(1) was amplified from Serratia liquefaciens by PCR and cloned into two vectors pET20-b(+) and pET28-a(+). The two recombinant plasmids were then transformed into E. coli BL21 (DE3) individually to express PLA(1). E. coli BL21(DE3)/pET28a-pla yielded(More)
OBJECTIVE In this study, we constructed two recombinant Escherichia coli strains to produce phospholipase C (PLC) from Acinetobacter calcoaceticus. The recombinant enzymes were purified to homogeneity and characterized. [Methods] We cloned the PLC encoding gene plc1, plc2 from genome DNA of A. calcoaceticus ATCC17902. The amplified fragments were inserted(More)
Trehalose synthase (TreS) could transform maltose into trehalose via isomerization. It is a crucial enzyme in the process of trehalose enzymatical transformation. In this study, plasmid-based inducible expression systems were constructed to produce Thermomonospora curvata TreS in B. licheniformis. Xylose operons from B. subtilis, B. licheniformis and B.(More)
In this study, the relationship between mycelium morphology and laccase production was studied. The results indicated that the morphology of P. ferulae pellets was changed when glass beads were added. Laccase production showed higher with spherical mycelium than with filamentous or flocculent mycelium. In addition, the spherical mycelium with a diameter of(More)
A sawdust sample collected from a wet environment was used to screen for crystal violet-decolorizing and methyl violet-decolorizing bacterial strains. A strain with degrading and decolorizing abilities was isolated and identified as Rhodococcus qingshengii JB301. The decolorization of crystal violet and methyl violet was improved by optimizing culture(More)
Isoamylase catalyzes the hydrolysis of α-1,6-glycosidic linkages in glycogen, amylopectin and α/β-limit dextrins. A semi-rational design strategy was performed to improve catalytic properties of isoamylase from Bacillus lentus. Three residues in vicinity of the essential residues, Arg505, Asn513, and Gly608, were chosen as the mutation sites and were(More)