What question did this study set out to answer?

Characterize the complete methylome of clinical Mycobacterium tuberculosis isolates to evaluate how epigenetic mechanisms drive phenotypic heterogeneity across lineages.

December 16, 2020PeerJOpen Access

Characterization of DNA methylation in Malawian Mycobacterium tuberculosis clinical isolates

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Authors

VNVictor NdhlovuKamuzu Central Hospital AKAnmol KiranAndhra University DSDerek J. SloanRadboud University Nijmegen

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Implication

Sequencing study reveals lineage-specific DNA methylation patterns and novel methyltransferase mutations in Mycobacterium tuberculosis, highlighting epigenetic drivers of phenotypic diversity.

Key Points

Characterize the complete methylome of clinical Mycobacterium tuberculosis isolates to evaluate how epigenetic mechanisms drive phenotypic heterogeneity across lineages.
Generated methylomes for 18 Mycobacterium tuberculosis clinical isolates from Malawi using Single Molecule Real Time (SMRT) sequencing.
Conducted comparative genomic and methylomic analyses across lineages, benchmarked against a global reference collection of 16 isolates.
Confirmed four methylation-disrupting mutations across four lineages, including complete loss of methylation driven by a C758T (S253L) mutation in the mamB gene of the Indo-oceanic lineage.
Identified a novel G454A (G152S) missense mutation in the mamA gene of the Euro-American lineage linked to total loss of methylation in the CCCAG motif.
Detected previously uncharacterized mutations affecting the pks15/1 locus in Lineage 6 isolates, confirming lineage-specific DNA methylation profiles.

Cite This Study

Ndhlovu et al. (2020) studied this question.

synapsesocial.com/papers/6a847f24da9d2319e77c09ed https://doi.org/10.7717/peerj.10432

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Implication

Sequencing study reveals lineage-specific DNA methylation patterns and novel methyltransferase mutations in Mycobacterium tuberculosis, highlighting epigenetic drivers of phenotypic diversity.

Characterization of DNA methylation in Malawian Mycobacterium tuberculosis clinical isolates

Discussion

Member takes

Implication

Key Points

Cite This Study

Characterization of DNA methylation in Malawian Mycobacterium tuberculosis clinical isolates

Discussion

Member takes

Implication

Key Points

Cite This Study

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