New Mycobacteroides abscessus subsp. massiliense strains with recombinant hsp65 gene laterally transferred from Mycobacteroides abscessus subsp. abscessus: Potential for misidentification of M. abscessus strains with the hsp65-based method

Autoři: Byoung-Jun Kim aff001;  Ga-Na Kim aff001;  Bo-Ram Kim aff001;  Tae-Sun Shim aff002;  Yoon-Hoh Kook aff001;  Bum-Joon Kim aff001
Působiště autorů: Department of Microbiology and Immunology, Biomedical Sciences, Liver Research Institute and Cancer Research Institute, College of Medicine, Seoul National University, Seoul, Korea aff001;  Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea aff002
Vyšlo v časopise: PLoS ONE 14(9)
Kategorie: Research Article
doi: 10.1371/journal.pone.0220312


It has been reported that lateral gene transfer (LGT) events among Mycobacteroides abscessus strains are prevalent. The hsp65 gene, a chronometer gene for bacterial phylogenetic analysis, is resistant to LGT events, particularly among mycobacterial strains, rendering the hsp65-targeting method the most widely used method for mycobacterial detection. To determine the prevalence of M. abscessus strains that are subject to hsp65 LGT, we applied rpoB typing to 100 clinically isolated Korean strains of M. abscessus that had been identified by hsp65 sequence analysis. The analysis indicated the presence of 2 rough strains, showing a discrepancy between the 2 typing methods. MLST analysis based on the partial sequencing of seven housekeeping genes, erm(41) PCR and further hsp65 PCR-restriction enzyme and polymorphism analysis (PRA) were conducted to identify the two strains. The MLST results showed that the two strains belong to M. abscessus subsp. massiliense and not to M. abscessus subsp. abscessus, as indicated by the rpoB-based analysis, suggesting that their hsp65 genes are subject to LGT from M. abscessus subsp. abscessus. Further analysis of these strains using the hsp65 PRA method indicated that these strains possess a PRA pattern identical to that of M. abscessus subsp. abscessus and distinct from that of M. abscessus subsp. massiliense. In conclusion, we identified two M. abscessus subsp. massiliense rough strains from Korean patients with hsp65 genes that might be laterally transferred from M. abscessus subsp. abscessus. To the best of our knowledge, this is the first demonstration of possible LGT events associated with the hsp65 gene in mycobacteria. Our results also suggest that there is the potential for misidentification when the hsp65-based protocol is used for mycobacterial identification.

Klíčová slova:

Biology and life sciences – Evolutionary biology – Evolutionary systematics – Phylogenetics – Phylogenetic analysis – Taxonomy – Molecular biology – Molecular biology techniques – Artificial gene amplification and extension – Polymerase chain reaction – Artificial genetic recombination – Gene targeting – Organisms – Bacteria – Actinobacteria – Mycobacterium tuberculosis – Mycobacteria – Microbiology – Medical microbiology – Microbial pathogens – Bacterial pathogens – Computer and information sciences – Data management – Research and analysis methods – Database and informatics methods – Bioinformatics – Sequence analysis – Sequence alignment – DNA sequence analysis – Medicine and health sciences – Pathology and laboratory medicine – Pathogens


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