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M. bovis BCG Moreau N-Terminal Loss Leads to a Less Stable Dodecin With Lower Flavin Binding Capacity

Tuberculosis still remains a concerning health problem worldwide. Its etiologic agent, Mycobacterium tuberculosis, continues to be the focus of research to unravel new prophylactic and therapeutic strategies against this disease. The only vaccine in use against tuberculosis is based on the in vitro...

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Autores principales: Schwarz, Marcos Gustavo Araujo, Luzes, Bianca Gallart Cinelli, Correa, Paloma Rezende, da Silva-Gonçalves, Antônio José, Machado, Lucas de Almeida, Guimarães, Ana Carolina Ramos, Mendonça-Lima, Leila
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8044443/
https://www.ncbi.nlm.nih.gov/pubmed/33869088
http://dx.doi.org/10.3389/fcimb.2021.658888
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author Schwarz, Marcos Gustavo Araujo
Luzes, Bianca Gallart Cinelli
Correa, Paloma Rezende
da Silva-Gonçalves, Antônio José
Machado, Lucas de Almeida
Guimarães, Ana Carolina Ramos
Mendonça-Lima, Leila
author_facet Schwarz, Marcos Gustavo Araujo
Luzes, Bianca Gallart Cinelli
Correa, Paloma Rezende
da Silva-Gonçalves, Antônio José
Machado, Lucas de Almeida
Guimarães, Ana Carolina Ramos
Mendonça-Lima, Leila
author_sort Schwarz, Marcos Gustavo Araujo
collection PubMed
description Tuberculosis still remains a concerning health problem worldwide. Its etiologic agent, Mycobacterium tuberculosis, continues to be the focus of research to unravel new prophylactic and therapeutic strategies against this disease. The only vaccine in use against tuberculosis is based on the in vitro attenuated strain, M. bovis BCG. Dodecin is a dodecameric complex important for flavin homeostasis in Archea and Eubacteria, and the M. tuberculosis protein is described as thermo- and halostable. M. bovis BCG Moreau, the Brazilian vaccine strain, has a single nucleotide polymorphism in the dodecin start codon, leading to a predicted loss of seven amino acids at the protein N-terminal end. In this work we aimed to characterize the effect of this mutation in the BCG Moreau protein features. Our recombinant protein assays show that the predicted BCG homolog is less thermostable than M.tb’s but maintains its dodecamerization ability, although with a lower riboflavin-binding capacity. These data are corroborated by structural analysis after comparative modeling, showing that the predicted BCG dodecin complex has a lower interaction energy among its monomers and also a distinct electrostatic surface near the flavin binding pocket. However, western blotting assays with the native proteins were unable to detect significant differences between the BCG Moreau and M.tb orthologs, indicating that other factors may be modulating protein structure/function in the bacterial context.
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spelling pubmed-80444432021-04-15 M. bovis BCG Moreau N-Terminal Loss Leads to a Less Stable Dodecin With Lower Flavin Binding Capacity Schwarz, Marcos Gustavo Araujo Luzes, Bianca Gallart Cinelli Correa, Paloma Rezende da Silva-Gonçalves, Antônio José Machado, Lucas de Almeida Guimarães, Ana Carolina Ramos Mendonça-Lima, Leila Front Cell Infect Microbiol Cellular and Infection Microbiology Tuberculosis still remains a concerning health problem worldwide. Its etiologic agent, Mycobacterium tuberculosis, continues to be the focus of research to unravel new prophylactic and therapeutic strategies against this disease. The only vaccine in use against tuberculosis is based on the in vitro attenuated strain, M. bovis BCG. Dodecin is a dodecameric complex important for flavin homeostasis in Archea and Eubacteria, and the M. tuberculosis protein is described as thermo- and halostable. M. bovis BCG Moreau, the Brazilian vaccine strain, has a single nucleotide polymorphism in the dodecin start codon, leading to a predicted loss of seven amino acids at the protein N-terminal end. In this work we aimed to characterize the effect of this mutation in the BCG Moreau protein features. Our recombinant protein assays show that the predicted BCG homolog is less thermostable than M.tb’s but maintains its dodecamerization ability, although with a lower riboflavin-binding capacity. These data are corroborated by structural analysis after comparative modeling, showing that the predicted BCG dodecin complex has a lower interaction energy among its monomers and also a distinct electrostatic surface near the flavin binding pocket. However, western blotting assays with the native proteins were unable to detect significant differences between the BCG Moreau and M.tb orthologs, indicating that other factors may be modulating protein structure/function in the bacterial context. Frontiers Media S.A. 2021-03-31 /pmc/articles/PMC8044443/ /pubmed/33869088 http://dx.doi.org/10.3389/fcimb.2021.658888 Text en Copyright © 2021 Schwarz, Luzes, Correa, Silva-Gonçalves, Machado, Guimarães and Mendonça-Lima https://creativecommons.org/licenses/by/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
spellingShingle Cellular and Infection Microbiology
Schwarz, Marcos Gustavo Araujo
Luzes, Bianca Gallart Cinelli
Correa, Paloma Rezende
da Silva-Gonçalves, Antônio José
Machado, Lucas de Almeida
Guimarães, Ana Carolina Ramos
Mendonça-Lima, Leila
M. bovis BCG Moreau N-Terminal Loss Leads to a Less Stable Dodecin With Lower Flavin Binding Capacity
title M. bovis BCG Moreau N-Terminal Loss Leads to a Less Stable Dodecin With Lower Flavin Binding Capacity
title_full M. bovis BCG Moreau N-Terminal Loss Leads to a Less Stable Dodecin With Lower Flavin Binding Capacity
title_fullStr M. bovis BCG Moreau N-Terminal Loss Leads to a Less Stable Dodecin With Lower Flavin Binding Capacity
title_full_unstemmed M. bovis BCG Moreau N-Terminal Loss Leads to a Less Stable Dodecin With Lower Flavin Binding Capacity
title_short M. bovis BCG Moreau N-Terminal Loss Leads to a Less Stable Dodecin With Lower Flavin Binding Capacity
title_sort m. bovis bcg moreau n-terminal loss leads to a less stable dodecin with lower flavin binding capacity
topic Cellular and Infection Microbiology
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8044443/
https://www.ncbi.nlm.nih.gov/pubmed/33869088
http://dx.doi.org/10.3389/fcimb.2021.658888
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