Recombinant heterologous proteins can be produced as insoluble aggregates partially or perfectly inactive in Escherichia coli. One of the strateges to improve the solubility of recombinant proteins is fusion with a partner that is excellent in producing soluble fusion proteins. To improve the production of soluble β-galactosidase, the gene of Thermus thermophilus KNOUC112 β-galactosidase (KNOUC...

Background: Fusion of the last two enzymes in pyrimidine biosynthetic pathway inverse order by having COOH-terminal orotate phosphoribosyltransferase (OPRT) and NH 2 -terminal orotidine 5′-monophosphate decarboxylase (OMPDC), as OPRT-OMPDC, has been described many organisms. Objective: The study aimed to select optimum host cell temperature for expressing recombinant fusion OMPDC-OPRT enzymatic...

DNA manipulation routinely requires competent bacteria that can be made using one of numerous methods. To determine the best methods, we compared four commonly used chemical methods (DMSO, MgCl2-CaCl2, CaCl2 and Hanahan's methods) on frequently used Escherichia coli (E. coli) strains: DH5α, XL-1 Blue, SCS110, JM109, TOP10 and BL21-(DE3)-PLysS. Hanahan's method was found to be most effective for...

BACKGROUND Recent analysis of Stenotrophomonas maltophilia has identified a novel family of resistance genes (Smqnr) encoding pentapeptide repeat proteins, which confer low-level resistance to quinolones. This study describes further novel variants present in clinical isolates of S. maltophilia and investigates their effect on resistance to a number of quinolones in an Escherichia coli host. ...

There are many different bacterial infections in the world that patients are suffering from and research teams are trying to find suitable ways to prevent and treat them. Urinary Tract Infections (UTIs) are most important infections in the world , and they are more common among women because vaginal cavity is near to urethral opening. The aim of this study is cloning of synthetic gene include a...

Cellulase is a group of enzymes (endoglucanase, exoglucanase and betaglucosidase) required for cellulosic feedstock hydrolysis during bioethanol production. The use of recombinant cellulase is a strategy to reduce the enzyme cost. In this context, the present work describes the construction of a cellulase expression vector (pEglABglA), which allowed constitutive co-expression of endoglucanase A...

background pe5 is a member of the pe protein family whose precise function is yet to be understood. there are about 100 members of the pe family proteins in mycobacterium tuberculosis. these glycine- and alanine-rich proteins consist of proline-glutamate motifs at their n-termini and may be implicated in pathogenesis of the bacilli. objectives we aimed to clone and over-express the rv0285 codin...