ANALYSIS OF A DNA POLYMORPHIC REGION IN THE GTFB AND GTFC GENES OF STREPTOCOCCUS-MUTANS

被引：18

作者：

CHIA, JS

LIN, SW

HSU, TY

CHEN, JY

KWAN, HW

YANG, CS

机构：

[1] NATL TAIWAN UNIV,COLL MED,GRAD INST MICROBIOL,TAIPEI,TAIWAN

[2] NATL TAIWAN UNIV,COLL MED,SCH DENT,TAIPEI,TAIWAN

[3] NATL TAIWAN UNIV,COLL MED,GRAD INST MED TECHNOL,TAIPEI,TAIWAN

来源：

INFECTION AND IMMUNITY | 1993年 / 61卷 / 04期

关键词：

D O I：

10.1128/IAI.61.4.1563-1566.1993

中图分类号：

R392 [医学免疫学]; Q939.91 [免疫学];

学科分类号：

100102 ;

摘要：

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.

引用

页码：1563 / 1566

页数：4

共 22 条

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