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Journal of Bacteriology, April 1999, p. 2290-2292, Vol. 181, No. 7
0021-9193/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.
Isolation of an Active Catalytic Core of
Streptococcus downei MFe28 GTF-I
Glucosyltransferase
Vincent
Monchois,1,*
Martha
Arguello-Morales,2,3 and
Roy R. B.
Russell1
Department of Oral Biology, The Dental
School, University of Newcastle upon Tyne, Newcastle upon Tyne NE2
4BW, United Kingdom,1 and Centre de
Bioingénierie Gilbert Durand, UMR CNRS
5504,2 and Laboratoire Associé
INRA, DGBA, INSA,3 31077 Toulouse Cedex 4, France
Received 6 October 1998/Accepted 20 January 1999
Truncated variants of GTF-I from Streptococcus downei
MFe28 were purified by means of a histidine tag. Sequential deletions showed that the C-terminal domain was not directly involved in the
catalytic process but was required for primer activation. A fully
active catalytic core of only 100 kDa was isolated.
*
Corresponding author. Mailing address: Department of
Oral Biology, Dental School, University of Newcastle upon Tyne,
Newcastle upon Tyne NE2 4BW, United Kingdom. Phone: (44) 191 222 8391. Fax: (44) 191 222 6137. E-mail:
vincent.monchois{at}ncl.ac.uk.
Journal of Bacteriology, April 1999, p. 2290-2292, Vol. 181, No. 7
0021-9193/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.
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