title: Three kinds of extracellular glucosyltransferases from Streptococcus mutans 6715 (serotype g).
abstract: In addition to the 1,3-alpha-D-glucan synthetase (pI 4.9) and the highly-branched 1,6-alpha-D-glucan synthetase (pI 3.9-4.1), Streptococcus mutans 6715 (serotype g) was found to secrete the third glucosyltransferase in multiple forms (pI 5.5-7.0), which exhibited 87% 1,6-alpha-bond-, 6% 1,3-alpha-bond- and 7% 1,3,6-branch-forming activities. The production of this enzyme was extremely enhanced when the organism was grown in Tween 80-supplemented medium. The 3 glucosyltransferases from the same organism were enzymatically and immunologically distinct from each other, and they were commonly found among the serotype g strains.
mesh_terms: D055598:Chemical Phenomena; D002621:Chemistry; D005964:Glucosyltransferases / Q000145:classification / Q000302:isolation & purification*; D005779:Immunodiffusion; D007525:Isoelectric Focusing; D012703:Serotyping; D013295:Streptococcus mutans / Q000145:classification / Q000201:enzymology*
chemical_list: D005964:Glucosyltransferases