These tools will no longer be maintained as of December 31, 2024. Archived website can be found here. PubMed4Hh GitHub repository can be found here. Contact NLM Customer Service if you have questions.
Pubmed for Handhelds
PUBMED FOR HANDHELDS
Search MEDLINE/PubMed
Title: Characterization of glucosyltransferase expressed from a Streptococcus sobrinus gene cloned in Escherichia coli. Author: Russell RR, Gilpin ML, Mukasa H, Dougan G. Journal: J Gen Microbiol; 1987 Apr; 133(4):935-44. PubMed ID: 2958599. Abstract: The gene encoding a glucosyltransferase which synthesized water-insoluble glucan, gtfI, previously cloned from Streptococcus sobrinus strain MFe28 (mutans serotype h) into a bacteriophage lambda vector, was subcloned into the plasmid pBR322. The recombinant plasmid was stable in Escherichia coli and gtfI was efficiently expressed. The GTF-I expressed in E. coli was compared to the corresponding enzymes in S. sobrinus strains MFe28 (serotype h), B13 (serotype d) and 6715 (serotype g) and shown to resemble them closely in molecular mass and isoelectric point. The insoluble glucan produced by GTF-I from recombinant E. coli consisted of 1,3-alpha-D-glycosyl residues (approximately 90%). An internal fragment of the gtfI gene was used as a probe in hybridization experiments to demonstrate the presence of homologous sequences in chromosomal DNA of other streptococci of the mutans group.[Abstract] [Full Text] [Related] [New Search]