Desenvolvimento de novo inibidor de ß-Lactamase de Staphylococcus aureus através do Software Mb-Isoster e Glide Docking

Autores

  • William Mesquita da Costa Universidade Federal de Alfenas
  • Luiz Felipe Gomês Simões
  • Sara Evelyn de Castro Silva
  • Nelson José Freitas da Silveira Universidade Federal de Alfenas https://orcid.org/0000-0001-9257-7322
  • Raíssa Gabrielle Rossi Universidade Federal de Alfenas https://orcid.org/0009-0005-1867-3558

Palavras-chave:

Staphylococcus aureus, β-lactamase, Docking Molecular, Bioisosterismo

Resumo

Staphylococcus aureus é uma bactéria oportunista que causa doenças em indivíduos
imunocomprometidos e está entre os patógenos responsáveis por infecções hospitalares. Cepas resistentes a
antibióticos como a MRSA e a VRSA tornaram-se uma preocupação crescente ao longo dos anos. Um dos seus
mecanismos de resistência a antibióticos é a produção de enzimas inativantes chamadas β-lactamases de classe
A. Neste estudo, visamos encontrar um novo fármaco capaz de se ligar à enzima β-lactamase da S. aureus e inibir
sua atividade, tornando a S. aureus multirresistente suscetível aos antibióticos β-lactâmicos novamente.
Escolhemos como alvo a estrutura tridimensional da β-lactamase da S. aureus PC-1, resolvida por cristalografia
de raios X à resolução de 2,0 Å. Realizamos o docking molecular usando o software Glide do Schrödinger Suite
para fazer a triagem de uma biblioteca de 228 potenciais inibidores, derivados do ácido clavulânico por
substituição bioisostérica através do software MB-Isoster. Descobrimos 5 novos compostos que se ligam mais
fortemente à β-lactamase da S. aureus do que o ácido clavulânico, um inibidor conhecido. Também avaliamos
suas propriedades farmacocinéticas usando o software QikProp do Schrödinger Suite, e encontramos um ligante
com um Percent Human Oral Absorption satisfatório de 82,976%. Nosso estudo demonstra o potencial da
substituição bioisostérica como uma estratégia para a descoberta de fármacos. Trabalhos futuros testarão a
eficácia e a segurança dos nossos inibidores in vivo.

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Publicado

25-12-2023

Como Citar

Mesquita da Costa, W., Gomês Simões, L. F., de Castro Silva, S. E., José Freitas da Silveira, N., & Gabrielle Rossi, R. (2023). Desenvolvimento de novo inibidor de ß-Lactamase de Staphylococcus aureus através do Software Mb-Isoster e Glide Docking. Sigmae, 12(2), 58–74. Recuperado de https://publicacoes.unifal-mg.edu.br/revistas/index.php/sigmae/article/view/1910

Edição

Seção

Ciências da Computação