DSpace Repository

Prediction of Mycobacterium tuberculosis pyrazinamidase function based on structural stability, physicochemical and geometrical descriptors

Show simple item record

dc.contributor.author Supo-Escalante, R.R.
dc.contributor.author Médico, A.
dc.contributor.author Gushiken, E.
dc.contributor.author Olivos-Ramírez, G.E.
dc.contributor.author Quispe, Y.
dc.contributor.author Torres, F.
dc.contributor.author Zamudio, M.
dc.contributor.author Antiparra, R.
dc.contributor.author Mario Amzel, L.
dc.contributor.author Gilman, R.H.
dc.contributor.author Sheen, P.
dc.contributor.author Zimic, M.
dc.date.accessioned 2020-12-14T16:10:16Z
dc.date.available 2020-12-14T16:10:16Z
dc.date.issued 2020
dc.identifier.uri https://hdl.handle.net/20.500.12866/8817
dc.description.abstract Background: Pyrazinamide is an important drug against the latent stage of tuberculosis and is used in both first- and second-line treatment regimens. Pyrazinamide-susceptibility test usually takes a week to have a diagnosis to guide initial therapy, implying a delay in receiving appropriate therapy. The continued increase in multi-drug resistant tuberculosis and the prevalence of pyrazinamide resistance in several countries makes the development of assays for prompt identification of resistance necessary. The main cause of pyrazinamide resistance is the impairment of pyrazinamidase function attributed to mutations in the promoter and/or pncA coding gene. However, not all pncA mutations necessarily affect the pyrazinamidase function. Objective: To develop a methodology to predict pyrazinamidase function from detected mutations in the pncA gene. Methods: We measured the catalytic constant (kcat), KM, enzymatic efficiency, and enzymatic activity of 35 recombinant mutated pyrazinamidase and the wild type (Protein Data Bank ID = 3pl1). From all the 3D modeled structures, we extracted several predictors based on three categories: structural stability (estimated by normal mode analysis and molecular dynamics), physicochemical, and geometrical characteristics. We used a stepwise Akaike's information criterion forward multiple log-linear regression to model each kinetic parameter with each category of predictors. We also developed weighted models combining the three categories of predictive models for each kinetic parameter. We tested the robustness of the predictive ability of each model by 6-fold cross-validation against random models. Results: The stability, physicochemical, and geometrical descriptors explained most of the variability (R2) of the kinetic parameters. Our models are best suited to predict kcat, efficiency, and activity based on the root-mean-square error of prediction of the 6-fold cross-validation. Conclusions: This study shows a quick approach to predict the pyrazinamidase function only from the pncA sequence when point mutations are present. This can be an important tool to detect pyrazinamide resistance. Copyright: © 2020 Supo-Escalante et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. en_US
dc.language.iso eng
dc.publisher PLoS
dc.relation.ispartof urn:issn:1932-6203
dc.rights info:eu-repo/semantics/restrictedAccess
dc.rights.uri https://creativecommons.org/licenses/by-nc-nd/4.0/deed.es
dc.subject UNAVAILABLE en_US
dc.title Prediction of Mycobacterium tuberculosis pyrazinamidase function based on structural stability, physicochemical and geometrical descriptors en_US
dc.type info:eu-repo/semantics/article
dc.identifier.doi https://doi.org/10.1371/journal.pone.0235643
dc.subject.ocde https://purl.org/pe-repo/ocde/ford#3.02.00 es_PE
dc.subject.ocde https://purl.org/pe-repo/ocde/ford#3.02.07
dc.subject.ocde https://purl.org/pe-repo/ocde/ford#3.01.05


Files in this item

Files Size Format View

There are no files associated with this item.

This item appears in the following Collection(s)

Show simple item record

info:eu-repo/semantics/restrictedAccess Except where otherwise noted, this item's license is described as info:eu-repo/semantics/restrictedAccess

Search DSpace


Browse

My Account

Statistics