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Updated: May 16, 2026
09:39
DNA Fingerprinting of Mycobacterium leprae Strains Using Variable Number Tandem Repeat (VNTR) - Fragment Length Analysis (FLA)
Published on: July 15, 2011
[The study of inter-simple sequences repeat genotyping based on one pentanucleotide repeat sequences in mycobacteria]
Shi-hui Gao1, Zhong-yi Hu, Ying-wei Zhao
1School of Biology and Basic Medical Sciences Soochow University, Suzhou 215123, China.
Summary
Inter-simple sequence repeat (ISSR) markers using the (CAGCG)n sequence effectively genotype mycobacterial strains. This molecular tool aids in differentiating various species and clinical isolates of Mycobacterium.
Area of Science:
- Microbiology
- Genetics
- Molecular Biology
Context:
- Mycobacteria possess abundant pentanucleotide repeat sequences, primarily within coding regions.
- Microsatellite analysis is crucial for understanding genetic diversity within bacterial populations.
Purpose:
- To develop novel Inter-Simple Sequence Repeat (ISSR) molecular markers for mycobacteria.
- To utilize the (CAGCG)n repeat sequence for creating a specific ISSR primer.
Summary:
- The pentanucleotide repeat sequence (CAGCG)n was analyzed in mycobacterial genomes using MICdb 2.0 software.
- A novel ISSR primer, MISP6, based on (CAGCG)n, was designed and tested on 17 reference mycobacterial strains and 41 clinical Mycobacterium tuberculosis strains.
- ISSR analysis successfully clustered reference strains into two major groups with subtypes and differentiated clinical M. tuberculosis strains into two clusters with subtypes.
Impact:
- The developed ISSR primer MISP6 serves as a reliable genetic marker for genotyping diverse mycobacterial strains.
- This molecular tool facilitates accurate genetic characterization and differentiation of mycobacteria, including clinical isolates.
- The findings contribute to improved molecular epidemiology and diagnostics for mycobacterial infections.
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