The group A streptococcal M-type 3 protein gene exhibits a C terminus typical for class I M proteins
โ Scribed by Andreas Podbielski; Robert Baird; Achim Kaufhold
- Publisher
- Springer-Verlag
- Year
- 1992
- Tongue
- English
- Weight
- 304 KB
- Volume
- 181
- Category
- Article
- ISSN
- 0300-8584
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โฆ Synopsis
The M protein gene (emm gene) from a reference group A streptococcal strain of serotype M3 was amplified by the polymerase chain reaction and partially sequenced. Hybridization assays using an oligonucleotide probe derived from the N-terminal sequence revealed that this gene segment is highly homologous among M-type 3 isolates. Of note, analysis of the nucleotide sequence data from the C terminus of the gene confirmed that the emm 3 gene exhibited all the features characteristic for group A streptococcal M-class I molecules. Recently published sequence data that were assigned to emm 3 resulted from a strain confusion and were shown to be the first one derived from an emm gene of an M-untypable isolate.
๐ SIMILAR VOLUMES
Two genes coding for cell surface proteins were cloned from a group A streptococcus type M4: the gene for an IgA binding protein and the gene for a fibrinogen binding protein. Both proteins were purified and partially characterized after expression in Escherichia coli. There was no immunological cro