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. 1993 Apr;61(4):1563–1566. doi: 10.1128/iai.61.4.1563-1566.1993

Analysis of a DNA polymorphic region in the gtfB and gtfC genes of Streptococcus mutans.

J S Chia 1, S W Lin 1, T Y Hsu 1, J Y Chen 1, H W Kwan 1, C S Yang 1
PMCID: PMC281402  PMID: 8454365

Abstract

We have previously demonstrated the existence of DNA polymorphisms at the 5' coding regions of the gtfB and gtfC genes specifying the streptococcal glucosyltransferases (J.S. Chia, T.Y. Hsu, L.J. Teng, J.Y. Chen, L.J. Hahn, and C.S. Yang, Infect. Immun. 59:1656-1660, 1991). DNA sequence analysis by polymerase chain reaction and direct sequencing revealed that while several nucleotide changes were identified, accounting for the polymorphisms, the amino acids which they code for remain unchanged. The polymorphic region is located in a highly conserved amino terminus of the glucosyltransferases. A peptide of 19 amino acids from this region reversed the inhibiting activity of an antiserum raised against the proteins coded for by the gtfB and gtfC genes. The results suggest that the polymorphic region, varying in DNA but not in amino acid sequences, might specify some biological function.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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