Format

Send to

Choose Destination
Biochim Biophys Acta. 1999 Dec 23;1489(2-3):457-61.

Genetic analysis of the gene cluster responsible for synthesis of serotype e-specific polysaccharide antigen in Actinobacillus actinomycetemcomitans.

Author information

1
Department of Preventive Dentistry, Kyushu University Faculty of Dentistry, Fukuoka, Japan.

Abstract

A gene cluster associated with the biosynthesis of the serotype e-specific polysaccharide antigen (SPA) of Actinobacillus actinomycetemcomitans IDH1705 belonging to serotype e was cloned and sequenced. This cluster consisted of 18 open reading frames. Escherichia coli produced the polysaccharide that reacts with the serotype e-specific antiserum when transformed with a plasmid containing the cluster. Comparing the structure of the gene cluster with similar clusters from A. actinomycetemcomitans strains Y4 (serotype b) and NCTC9710 (serotype c) revealed that a 5.3-kb region containing the distal half of one gene and two entire genes in the cluster from strain IDH1705 replaced a 6.2-kb region containing eight genes in the cluster from strain Y4, and a 4.7-kb region containing four genes in the cluster from strain NCTC9710. These results suggest that this region is essential to the antigenic specificity of serotype e A. actinomycetemcomitans.

PMID:
10673051
DOI:
10.1016/s0167-4781(99)00192-x
[Indexed for MEDLINE]

Supplemental Content

Full text links

Icon for Elsevier Science
Loading ...
Support Center