O uso de bactérias para biorremediação de ambientes contaminados com tolueno: uma análise molecular por docking

Autores

DOI:

https://doi.org/10.5902/2179460X68835

Palavras-chave:

BTXs, Proteínas, Combustíveis

Resumo

As bactérias podem ser organismos úteis para a descontaminação ambiental através de processos de biorremediação. Dentre os contaminantes ambientais, o tolueno é um dos compostos presentes na gasolina e pode ser tóxico no ambiente aquático, causando danos significativos aos organismos deste ecossistema. A compreensão detalhada sobre as principais proteínas e processos envolvidos em rotas celulares de biorremediação é pouco explorada, o que encoraja os estudos na área para a otimização desses processos. Sabe-se que o sistema transportador ABC está envolvido no transporte de uma ampla variedade de compostos inorgânicos e de moléculas orgânicas complexas. O docking molecular (DM) é uma metodologia in silico na qual unem-se duas moléculas (receptor versus ligante) e verifica-se características químicas dessa ligação. Desse modo, o objetivo desse estudo foi avaliar, através da ferramenta de docking molecular, a interação entre o tolueno e transportadores ABC das espécies bacterianas de Staphylococcus aureus e Thermotoga maritima, possibilitando identificar espécies promissoras para a biorremediação do tolueno. Para o DM utilizou-se os softwares UCFS Chimera (para eliminação de heteroátomos e produção das imagens em 3D), AutoDock Tools (para preparação das proteínas e do tolueno para o docking), AutoDock Vina (para o docking per se) e LigPlot + (para verificação de aminoácidos e tipos de ligação entre moléculas). A energia de ligação entre os transportadores ABC e o tolueno foi semelhante para ambas as espécies, sendo para S. aureus -5.2 Kcal/mol e para T. maritima -5.5 Kcal/mol. O número de aminoácidos do transportador que se ligaram ao tolueno foi diferente para as duas espécies: S. aureus uniu-se através de três aminoácidos, enquanto T. maritima uniu-se através de sete aminoácidos. Os resultados apresentados nesse estudo demonstram que ambas as espécies avaliadas são promissoras para estudo in vitro e in vivo para biorremediação do tolueno.

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Biografia do Autor

Eduarda Medran Rangel, Instituto Federal Sul-rio-grandense

Science Professor at the Rio Grande City. Environmental Management and Environmental Sanitation degree at the Instituto Federal Sul-rio-grandense, and a degree in Chemistry from the Universidade de Franca. Specialization in Urban Environmental Education by the `Programa Universidade Aberta do Brazil, Specialization in Environmental Chemistry by the Instituto Federal Sul-rio-grandense. Master's and PhD in Materials Science and Engineering by the Universidade Federal de Pelotas.

Estela Fernandes e Silva, Prefeitura Municipal de Rio Grande, Rio Grande, RS

Biotechnology degree by the Universidade Federal de Pelotas, Biology degree by the Universidade de Franca, Master's and PhD from the Postgraduate Program in Physiological Sciences of the Universidade Federal de Rio Grande.

Karine Laste Macagnan, Prefeitura Municipal de Rio Grande, Rio Grande, RS, Brazil

Biotechnology degree by the Universidade Federal de Pelotas and Pedagogical Training in Biology by the Universidade de Franca. Master's and PhD in Sciences by the Graduate Program in Biotechnology by the Universidade Federal de Pelotas.

Louise Vargas Ribeiro, Universidade Federal de Pelotas, Pelotas, RS

Degree in Biological Sciences by the Universidade Federal de Pelotas, Pedagogical Training by the from the Instituto Federal Sul-rio-grandense (IFSUL), and a Specialization in Environmental Chemistry (IFSUL). Master´'s and PhD in Agronomy from the Universidade Federal de Pelotas.

Tainã Figueiredo Cardoso, Embrapa Pecuária Sudeste, Pelotas, RS

Biotechnology degree at the Federal Universidade Federal de Pelotas, Master's in Physiological Sciences - Comparative Animal Physiology from the Universidade Federal de Rio Grande, and PhD in Animal Production from the Universitat Autònoma de Barcelona.

Daiana Kaster Garcez, Universidade Federal do Rio Grande, Rio Grande, RS

Science Professor at the Rio Grande City. Master's and PhD in Biology of Continental Aquatic Environments by the Universidade Federal de Rio Grande. Biological Sciences degree with emphasis in Zoology by the Universidade Federal de Pelotas, and a Licentiate in Biological Sciences from the Instituto Federal Sul-Rio-Grandense.

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Publicado

2022-04-04 — Atualizado em 2022-04-18

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Rangel, E. M., Silva, E. F. e, Macagnan, K. L., Ribeiro, L. V., Cardoso, T. F., & Garcez, D. K. (2022). O uso de bactérias para biorremediação de ambientes contaminados com tolueno: uma análise molecular por docking. Ciência E Natura, 44, e17. https://doi.org/10.5902/2179460X68835 (Original work published 4º de abril de 2022)

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