Chlamydia pan-genomic analysis reveals balance between host adaptation and selective pressure to genome reduction

O.M. Sigalova, A.V. Chaplin, O. Bochkareva, P.V. Shelyakin, V.A. Filaretov, E.E. Akkuratov, V. Burskaia, M.S. Gelfand, BMC Genomics 20 (2019) 710.

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Journal Article | Published | English
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Abstract
Background Chlamydia are ancient intracellular pathogens with reduced, though strikingly conserved genome. Despite their parasitic lifestyle and isolated intracellular environment, these bacteria managed to avoid accumulation of deleterious mutations leading to subsequent genome degradation characteristic for many parasitic bacteria. Results We report pan-genomic analysis of sixteen species from genus Chlamydia including identification and functional annotation of orthologous genes, and characterization of gene gains, losses, and rearrangements. We demonstrate the overall genome stability of these bacteria as indicated by a large fraction of common genes with conserved genomic locations. On the other hand, extreme evolvability is confined to several paralogous gene families such as polymorphic membrane proteins and phospholipase D, and likely is caused by the pressure from the host immune system. Conclusions This combination of a large, conserved core genome and a small, evolvable periphery likely reflect the balance between the selective pressure towards genome reduction and the need to adapt to escape from the host immunity.
Publishing Year
Date Published
2019-09-12
Journal Title
BMC Genomics
Volume
20
Issue
1
Article Number
710
eISSN
IST-REx-ID

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Sigalova OM, Chaplin AV, Bochkareva O, et al. Chlamydia pan-genomic analysis reveals balance between host adaptation and selective pressure to genome reduction. BMC Genomics. 2019;20(1):710. doi:10.1186/s12864-019-6059-5
Sigalova, O. M., Chaplin, A. V., Bochkareva, O., Shelyakin, P. V., Filaretov, V. A., Akkuratov, E. E., … Gelfand, M. S. (2019). Chlamydia pan-genomic analysis reveals balance between host adaptation and selective pressure to genome reduction. BMC Genomics, 20(1), 710. https://doi.org/10.1186/s12864-019-6059-5
Sigalova, Olga M., Andrei V. Chaplin, Olga Bochkareva, Pavel V. Shelyakin, Vsevolod A. Filaretov, Evgeny E. Akkuratov, Valentina Burskaia, and Mikhail S. Gelfand. “Chlamydia Pan-Genomic Analysis Reveals Balance between Host Adaptation and Selective Pressure to Genome Reduction.” BMC Genomics 20, no. 1 (2019): 710. https://doi.org/10.1186/s12864-019-6059-5.
O. M. Sigalova et al., “Chlamydia pan-genomic analysis reveals balance between host adaptation and selective pressure to genome reduction,” BMC Genomics, vol. 20, no. 1, p. 710, 2019.
Sigalova OM, Chaplin AV, Bochkareva O, Shelyakin PV, Filaretov VA, Akkuratov EE, Burskaia V, Gelfand MS. 2019. Chlamydia pan-genomic analysis reveals balance between host adaptation and selective pressure to genome reduction. BMC Genomics. 20(1), 710.
Sigalova, Olga M., et al. “Chlamydia Pan-Genomic Analysis Reveals Balance between Host Adaptation and Selective Pressure to Genome Reduction.” BMC Genomics, vol. 20, no. 1, BioMed Central, 2019, p. 710, doi:10.1186/s12864-019-6059-5.
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