Characterization of a sucrase gene from Staphylococcus xylosus.
AUTOR(ES)
Brückner, R
RESUMO
The Staphylococcus xylosus gene scrB, encoding a sucrase, has been isolated from a genomic library of S. xylosus constructed in Escherichia coli. The gene was detected by its ability to confer utilization of the glucose and fructose residues of raffinose in an E. coli strain that is not able to metabolize galactose. It was found to reside within a 1.8-kb DNA fragment, the nucleotide sequence of which was determined. One large open reading frame, which is preceded by a ribosome binding site, is encoded on the fragment. Its deduced amino acid sequence yields a protein with a molecular mass of 57.377 kDa which shows significant homology with bacterial sucrose-6-phosphate hydrolases and sucrases. Overexpression of scrB in E. coli by the bacteriophage T7 polymerase promoter system resulted in the production of a protein with an apparent molecular mass of 58 kDa. Disruption of the scrB gene in the S. xylosus genome rendered S. xylosus unable to utilize sucrose. Thus, the ScrB sucrase is essential for sucrose metabolism in S. xylosus.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=196229Documentos Relacionados
- Characterization of a genetic locus essential for maltose-maltotriose utilization in Staphylococcus xylosus.
- Glucose kinase-dependent catabolite repression in Staphylococcus xylosus.
- Transcriptional regulation of the sucrase gene of Staphylococcus xylosus by the repressor ScrR.
- Expression of recombinant proteins on the surface of the coagulase-negative bacterium Staphylococcus xylosus.
- Characterization of an HPr Kinase Mutant of Staphylococcus xylosus
