dc.contributor |
Universitat Politècnica de Catalunya. Departament de Matemàtiques |
dc.contributor |
Universitat Politècnica de Catalunya. SD - Sistemes Dinàmics de la UPC |
dc.contributor.author |
Forners, Joan |
dc.contributor.author |
Lázaro Ochoa, José Tomás |
dc.contributor.author |
Alarcón, Tomás |
dc.contributor.author |
F. Elena, Santiago |
dc.contributor.author |
Sardanyes, Josep |
dc.date |
2019-01-07 |
dc.identifier.citation |
Forners, J., Lazaro, J. Tomás, Alarcón, T., F. Elena, S., Sardanyes, J. Viral replication modes in single-peak fitness landscapes: A dynamical systems analysis. "Journal of theoretical biology", 7 Gener 2019, vol. 460, p. 170-183. |
dc.identifier.citation |
0022-5193 |
dc.identifier.citation |
10.1016/j.jtbi.2018.10.007 |
dc.identifier.uri |
http://hdl.handle.net/2117/125463 |
dc.language.iso |
eng |
dc.relation |
https://www.sciencedirect.com/science/article/pii/S0022519318304776?via%3Dihub |
dc.rights |
Attribution-NonCommercial-NoDerivs 3.0 Spain |
dc.rights |
info:eu-repo/semantics/openAccess |
dc.rights |
http://creativecommons.org/licenses/by-nc-nd/3.0/es/ |
dc.subject |
Àrees temàtiques de la UPC::Matemàtiques i estadística |
dc.subject |
Differentiable dynamical systems |
dc.subject |
Bifurcations |
dc.subject |
Dynamical systems |
dc.subject |
Error threshold |
dc.subject |
Replication modes |
dc.subject |
RNA viruses |
dc.subject |
Single-peak fitness landscape |
dc.subject |
Sistemes dinàmics diferenciables |
dc.title |
Viral replication modes in single-peak fitness landscapes: A dynamical systems analysis |
dc.type |
info:eu-repo/semantics/submittedVersion |
dc.type |
info:eu-repo/semantics/article |
dc.description.abstract |
Positiv e-sense, single-stranded RN A viruses are im portant pathogens infecting almost all types of organ- isms. Experimental evidence from distributions of mutations and from viral RN A ampli¿cation suggest that these pathogens may follow different RN A replication modes, r anging from the stamping machine replication (SMR) to the geo metric replication (GR) mode. Although previous theoretical work has focuse d on the evolutionary dynamics of RNA viruses amplifying their genomes with dif fer ent strategies, little is known in ter ms of the bifurcations and transitions invol ving the so-called error threshold (mutation- induced dominance of mutants) and lethal mutagenesis (extinction of all sequences due to mutation ac- cumulation and demographic stochasti city). Here we analyze a dynamical system describing the intracel- lular ampli¿cation of viral RN A genomes e volving on a single-peak ¿tness landscape focusing on thr ee cases considering neutral, deleterious, and lethal mutants. We analytically derive the critical mutation rates causing lethal mutagenesis and err or thr eshold, governe d by transcritical bifurcations that depend on parameters a (paramet er introducing the mode of replication), repl icat ive ¿tness of mutants ( k 1 ), and on the spontaneous degradation rate s of the sequences ( ¿ ). Our re sults re late the error catastrophe with lethal mutag enesis in a model with continuous populations of viral genome s. The form er case invol ves dominance of the mutant sequences, while the latter , a deterministic extinction of the viral RNAs during replication due to increased mutation. Fo r the lethal case the critical mutation ra te involving lethal mu- tagenesis is µ c = 1 - e / v a . Here, the SMR involv es lower critical mutation ra tes, being the system more robu st to lethal mutagenesis replicating closer to the GR mode. This resul t is also f ound for the neutral and deleterious cases, but for these later cases lethal mutagenesis can shift to the er r or threshold once the replication mode surpasses a threshold given by v a = ¿ /k 1 |
dc.description.abstract |
Peer Reviewed |