Plasmid stability analysis based on a new theoretical model employing stochastic simulations

Olesia Werbowy , Sławomir Werbowy , Tadeusz Kaczorowski

Abstract

Here, we present a simple theoretical model to study plasmid stability, based on one input parameter which is the copy number of plasmids present in a host cell. The Monte Carlo approach was used to analyze random fluctuations affecting plasmid replication and segregation leading to gradual reduction in the plasmid population within the host cell. This model was employed to investigate maintenance of pEC156 derivatives, a high-copy number ColE1-type Escherichia coli plasmid that carries an EcoVIII restriction-modification system. Plasmid stability was examined in selected Escherichia coli strains (MG1655, wild-type; MG1655 pcnB, and hyper-recombinogenic JC8679 sbcA). We have compared the experimental data concerning plasmid maintenance with the simulations and found that the theoretical stability patterns exhibited an excellent agreement with those empirically tested. In our simulations, we have investigated the influence of replication fails (α parameter) and uneven partition as a consequence of multimer resolution fails (δ parameter), and the post-segregation killing factor (β parameter). All of these factors act at the same time and affect plasmid inheritance at different levels. In case of pEC156-derivatives we concluded that multimerization is a major determinant of plasmid stability. Our data indicate that even small changes in the fidelity of segregation can have serious effects on plasmid stability. Use of the proposed mathematical model can provide a valuable description of plasmid maintenance, as well as enable prediction of the probability of the plasmid loss.
Autor Olesia Werbowy (WB / KM)
Olesia Werbowy
- Katedra Mikrobiologii
, Sławomir Werbowy (WMFiI / IFD)
Sławomir Werbowy
- Instytut Fizyki Doświadczalnej
, Tadeusz Kaczorowski (WB / KM)
Tadeusz Kaczorowski
- Katedra Mikrobiologii
Inne wersje tytułu
Tytuł czasopisma/seriiPlos One, ISSN 1932-6203, (A 35 pkt)
Rok wydania2017
Tom12
Nr8
Paginacja1-21
Objętość publikacji w arkuszach wydawniczych1
Słowa kluczowe w języku angielskimMonte Carlo method, postsegregational cell killing, plasmid persistence, restriction-modification system, plasmid multimerization, plasmid copy number
Klasyfikacja ASJC1100 General Agricultural and Biological Sciences; 1300 General Biochemistry, Genetics and Molecular Biology; 2700 General Medicine
DOIDOI:10.1371/journal.pone.0183512
URL http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0183512
Języken angielski
LicencjaCzasopismo (tylko dla artykułów); licence.documentVersion.FINAL_PUBLISHED; Uznanie Autorstwa (CC-BY); w dniu opublikowania
Punktacja (całkowita)35
PunktacjaPunktacja MNiSW = 35.0, 24-07-2019, ArticleFromJournal
Wskaźniki publikacji Cytowania WoS = 3; Scopus SNIP (Source Normalised Impact per Paper): 2017 = 1.111; Impact Factor WoS: 2017 = 2.766 (2) - 2017=3.352 (5)
Liczba cytowań*
Cytuj
Udostępnij Udostępnij

Pobierz odnośnik do tego rekordu


* Podana liczba cytowań wynika z analizy informacji dostępnych w Internecie i jest zbliżona do wartości obliczanej przy pomocy systemu Publish or Perish.
Powrót