Dual functionality of the amyloid protein TasA in Bacillus physiology and fitness on the phylloplane

Jesús Cámara-Almirón, Yurena Navarro, Luis Díaz-Martínez, María Concepción Magno-Pérez-Bryan, Carlos Molina-Santiago, John R. Pearson, Antonio de Vicente, Alejandro Pérez-García and Diego Romero ()
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Jesús Cámara-Almirón: Instituto de Hortofruticultura Subtropical y Mediterránea “La Mayora” – Departamento de Microbiología, Universidad de Málaga, Bulevar Louis Pasteur 31 (Campus Universitario de Teatinos)
Yurena Navarro: Instituto de Hortofruticultura Subtropical y Mediterránea “La Mayora” – Departamento de Microbiología, Universidad de Málaga, Bulevar Louis Pasteur 31 (Campus Universitario de Teatinos)
Luis Díaz-Martínez: Instituto de Hortofruticultura Subtropical y Mediterránea “La Mayora” – Departamento de Microbiología, Universidad de Málaga, Bulevar Louis Pasteur 31 (Campus Universitario de Teatinos)
María Concepción Magno-Pérez-Bryan: Instituto de Hortofruticultura Subtropical y Mediterránea “La Mayora” – Departamento de Microbiología, Universidad de Málaga, Bulevar Louis Pasteur 31 (Campus Universitario de Teatinos)
Carlos Molina-Santiago: Instituto de Hortofruticultura Subtropical y Mediterránea “La Mayora” – Departamento de Microbiología, Universidad de Málaga, Bulevar Louis Pasteur 31 (Campus Universitario de Teatinos)
John R. Pearson: Nano-imaging Unit, Andalusian Centre for Nanomedicine and Biotechnology, BIONAND
Antonio de Vicente: Instituto de Hortofruticultura Subtropical y Mediterránea “La Mayora” – Departamento de Microbiología, Universidad de Málaga, Bulevar Louis Pasteur 31 (Campus Universitario de Teatinos)
Alejandro Pérez-García: Instituto de Hortofruticultura Subtropical y Mediterránea “La Mayora” – Departamento de Microbiología, Universidad de Málaga, Bulevar Louis Pasteur 31 (Campus Universitario de Teatinos)
Diego Romero: Instituto de Hortofruticultura Subtropical y Mediterránea “La Mayora” – Departamento de Microbiología, Universidad de Málaga, Bulevar Louis Pasteur 31 (Campus Universitario de Teatinos)

Nature Communications, 2020, vol. 11, issue 1, 1-21

Abstract: Abstract Bacteria can form biofilms that consist of multicellular communities embedded in an extracellular matrix (ECM). In Bacillus subtilis, the main protein component of the ECM is the functional amyloid TasA. Here, we study further the roles played by TasA in B. subtilis physiology and biofilm formation on plant leaves and in vitro. We show that ΔtasA cells exhibit a range of cytological symptoms indicative of excessive cellular stress leading to increased cell death. TasA associates to the detergent-resistant fraction of the cell membrane, and the distribution of the flotillin-like protein FloT is altered in ΔtasA cells. We propose that, in addition to a structural function during ECM assembly and interactions with plants, TasA contributes to the stabilization of membrane dynamics as cells enter stationary phase.

Date: 2020
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DOI: 10.1038/s41467-020-15758-z

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