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Positive selection analysis of Cyt proteins from Bacillus thuringiensis: a conservative trend driven by negative (purifying) selection

Bacillus thuringiensis is a Gram-positive entomopathogenic bacterium that produces different pesticidal proteins: vegetative insecticidal proteins (Vpb1/Vpa2, Vip3, and Vpb4) during vegetative growth, which are secreted to the culture medium, and δ–endotoxins (Cry and Cyt) during sporulation, which...

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Main Authors: Palma, Leopoldo, Sauka, Diego Herman, Berry, Colin, Peralta, Cecilia
Format: info:ar-repo/semantics/artículo
Language:Inglés
Published: Elsevier 2024
Subjects:
Bacillus thuringiensis
Control Biológico
Biological Control
Pesticides
Plaguicidas
Cyt proteins
pesticidas
bacteria entomopatógena
Biocontrol
Online Access:http://hdl.handle.net/20.500.12123/19360
https://www.sciencedirect.com/science/article/abs/pii/S0041010124004252
https://doi.org/10.1016/j.toxicon.2024.107853
Summary:Bacillus thuringiensis is a Gram-positive entomopathogenic bacterium that produces different pesticidal proteins: vegetative insecticidal proteins (Vpb1/Vpa2, Vip3, and Vpb4) during vegetative growth, which are secreted to the culture medium, and δ–endotoxins (Cry and Cyt) during sporulation, which accumulate into parasporal crystals. Cyt proteins are the smaller subset of δ–endotoxins targeting Diptera species. While Cry and Vip3 proteins undergo positive selection, our analysis suggests that Cyt proteins evolve following a conservative trend driven negative (purifying) selection.

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