Analysis of DNA corresponding to group A streptococcal A- and B-regions of M protein by restriction fragment length polymorphism
The emm gene amplicons encoding the N- and partial C-terminal regions of the M protein from Group A streptococcus (GAS) isolates were amplified by PCR and digested with a restriction endonuclease, AluI. Digested PCR products were then resolved by polyacrylamide gel electrophoresis. Using one pair of...
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| Main Authors: | , , , , |
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| Format: | Book Series |
| Published: |
2018
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| Subjects: | |
| Online Access: | https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=33645951662&origin=inward http://cmuir.cmu.ac.th/jspui/handle/6653943832/61880 |
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| Institution: | Chiang Mai University |
| Summary: | The emm gene amplicons encoding the N- and partial C-terminal regions of the M protein from Group A streptococcus (GAS) isolates were amplified by PCR and digested with a restriction endonuclease, AluI. Digested PCR products were then resolved by polyacrylamide gel electrophoresis. Using one pair of primers, 13 known GAS M types showed one to four bands of PCR products. Digested with AluI, they exhibited different restriction RFLP patterns. Of 106 GAS isolates examined from normal population and patients with GAS-associated complications, 95 isolates showed RFLP patterns that corresponded to the 13 known M types. The other 11 isolates demonstrated different RFLP patterns other than the known M types. They were then analyzed by DNA sequencing and other six M types were obtained. In addition, M93 GAS was the most common from the population studied, which is consistent with a previous study of Thai GAS isolates. This PCR-RFLP protocol has the potential for the rapid screening of GAS emm types, and would be able to characterize the number of C-region in different types of GAS. This method is considerably advantageous as an alternative M typing approach for epidemiological studies in developing countries in which GAS is endemic and DNA sequencer and budgets are limited. © 2005 Elsevier B.V. All rights reserved. |
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