Calum Johnston

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Publications

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A tripartite protein complex promotes DNA transport during natural transformation in Firmicutes

Marie Dewailly , Yoann Fauconnet , Cécile Ducrot , Anne-Lise Soulet , Nathalie Campo et al.

Proceedings of the National Academy of Sciences of the United States of America, 2025, 122 (47), pp.e2511180122. ⟨10.1073/pnas.25111801221of12⟩

Article dans une revue hal-05380279v1
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Competence induction of homologous recombination genes protects pneumococcal cells from genotoxic stress

David de Lemos , Anne-Lise Soulet , Violette Morales , Mathieu Berge , Patrice Polard et al.

mBio, 2024, 16, ⟨10.1128/mbio.03142-24⟩

Article dans une revue hal-05266409v1
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Pneumococcal competence is a populational health sensor driving multilevel heterogeneity in response to antibiotics

Marc Prudhomme , Calum H G Johnston , Anne-Lise Soulet , Anne Boyeldieu , David de Lemos et al.

Nature Communications, 2024, 15 (1), pp.5625. ⟨10.1038/s41467-024-49853-2⟩

Article dans une revue hal-04730683v1
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The RecA-directed recombination pathway of natural transformation initiates at chromosomal replication forks in the pneumococcus

Calum H G Johnston , Rachel Hope , Anne-Lise Soulet , Marie Dewailly , David de Lemos et al.

Proceedings of the National Academy of Sciences of the United States of America, 2023, 120 (8), pp.e2213867120. ⟨10.1073/pnas.2213867120⟩

Article dans une revue hal-04044806v1
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The alternative sigma factor σX mediates competence shut-off at the cell pole in Streptococcus pneumoniae

Calum Hg Johnston , Anne-Lise Soulet , Mathieu Bergé , Marc Prudhomme , David de Lemos et al.

eLife, 2020, 9, pp.e62907. ⟨10.7554/elife.62907⟩

Article dans une revue hal-03411156v1
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Recombination of the Phase-Variable spnIII Locus Is Independent of All Known Pneumococcal Site-Specific Recombinases

M. de Ste Croix , K y Chen , I Vacca , A. S. Manso , Calum Johnston et al.

Journal of Bacteriology, In press, 201 (15), pp.e00233-19. ⟨10.1128/JB.00233-19⟩

Article dans une revue hal-02367986v1
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Recombination of the Phase-Variable spnIII Locus Is Independent of All Known Pneumococcal Site-Specific Recombinases

M de Ste Croix , K y Chen , I Vacca , A S Manso , P Polard et al.

Journal of Bacteriology, 2019, 201 (15), pp.e00233. ⟨10.1128/jb.00233-19⟩

Article dans une revue hal-03031130v1
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Fine-tuning cellular levels of DprA ensures transformant fitness in the human pathogen Streptococcus pneumoniae.

Calum Johnston , Isabelle Mortier-Barrière , Vanessa Khemici , Patrice P. Polard

Molecular Microbiology, 2018, 109 (5), pp.663-675. ⟨10.1111/mmi.14068⟩

Article dans une revue hal-02367975v1

Streptococcus pneumoniae, le transformiste.

Calum Johnston , N. Campo , Berge M. , P. Polard , J.P. Claverys

Trends in Microbiology, 2014, 22, pp.113-119

Article dans une revue hal-01117721v1

Streptococcus pneumoniae, le transformiste

Calum Johnston , Nathalie N. Campo , Mathieu Bergé , Patrice P. Polard , Jean-Pierre Claverys

Trends in Microbiology, 2014, 22 (3), pp.113-119. ⟨10.1016/j.tim.2014.01.002⟩

Article dans une revue istex hal-02370123v1

Bacterial transformation: distribution, shared mechanisms and divergent control.

Calum Johnston , B. Martin , G. Fichant , P. Polard , J.P. Claverys

Nature Reviews Microbiology, 2014, 12, pp.181-196

Article dans une revue hal-01117850v1

The DpnI/DpnII pneumococcal system, defense against foreign attack without compromising genetic exchange

Calum Johnston , P. Polard , J.P. Claverys

Mobile Genetic Elements, 2013, 3, pp.e25582

Article dans une revue hal-00946759v1

Investigating the role of pneumococcal neuraminidase A activity in isolates from pneumococcal haemolytic uraemic syndrome

Andrew Smith , Calum Johnston , Donald Inverarity , Mary Slack , Gavin K. Paterson et al.

Journal of Medical Microbiology, 2013, 62, pp.1735 - 1742. ⟨10.1099/jmm.0.063479-0⟩

Article dans une revue hal-05266372v1

Postreplication targeting of transformants by bacterial immune systems?

Calum Johnston , B. Martin , P. Polard , J.P. Claverys

Trends in Microbiology, 2013, 21, pp.516-521

Article dans une revue hal-00946765v1

Programmed protection of foreign DNA from restriction allows pathogenicity island exchange during pneumococcal transformation.

Calum Johnston , B. Martin , Chantal Granadel , P. Polard , J.P. Claverys

PLoS Pathogens, 2013, 9 (2), pp.e1003178. ⟨10.1371/journal.ppat.1003178⟩

Article dans une revue hal-00946761v1

Natural genetic transformation generates a population of merodiploids in Streptococcus pneumoniae

Calum Johnston , S. Caymaris , A. Zomer , H.J. Bootsma , M. Prudhomme et al.

PLoS Genetics, 2013, 9 (9), pp.e1003819. ⟨10.1371/journal.pgen.1003819⟩

Article dans une revue hal-00946746v1
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Detection of Large Numbers of Pneumococcal Virulence Genes in Streptococci of the Mitis Group

Calum Johnston , Jason Hinds , Andrew Smith , Mark van der Linden , Johan van Eldere et al.

Journal of Clinical Microbiology, 2010, 48, pp.2762 - 2769. ⟨10.1128/jcm.01746-09⟩

Article dans une revue hal-05266329v1
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Presence of Nonhemolytic Pneumolysin in Serotypes of Streptococcus pneumoniae Associated with Disease Outbreaks

Johanna M C Jefferies , Calum H G Johnston , Lea‐ann S Kirkham , Graeme J M Cowan , Kirsty S Ross et al.

Journal of Infectious Diseases, 2007, 196, pp.936 - 944. ⟨10.1086/520091⟩

Article dans une revue hal-05266305v1
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Identification of a Secreted Cholesterol-Dependent Cytolysin (Mitilysin) from <i>Streptococcus mitis</i>

Johanna Jefferies , Leena Nieminen , Lea-Ann Kirkham , Calum Johnston , Andrew Smith et al.

Journal of Bacteriology, 2006, 189, pp.627 - 632. ⟨10.1128/jb.01092-06⟩

Article dans une revue hal-05266339v1