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Fixed points and limit cycles in the population dynamics of lysogenic viruses and their hosts [PDF]
Physical Review E, 2010 Starting with stochastic rate equations for the fundamental interactions between microbes and their viruses, we derive a mean field theory for the population dynamics of microbe-virus systems, including the effects of lysogeny. In the absence of lysogeny, our model is a generalization of that proposed phenomenologically by Weitz and Dushoff.
Zhenyu Wang, Nigel Goldenfeld
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Low Host Abundance and High Temperature Determine Switching from Lytic to Lysogenic Cycles in Planktonic Microbial Communities in a Tropical Sea (Red Sea) [PDF]
Viruses, 2020 The lytic and lysogenic life cycles of marine phages are influenced by environmental conditions such as solar radiation, temperature, and host abundance. Temperature can regulate phage infection, but its role is difficult to discern in oligotrophic waters where there is typically low host abundance and high temperatures.
Ruba A. Ashy, Susana Agustı́
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Modulation of Lactobacillus casei bacteriophage A2 lytic/lysogenic cycles by binding of Gp25 to the early lytic mRNA [PDF]
Molecular Microbiology, 2015 SummaryThe genetic switch of Lactobacillus casei bacteriophage A2 is regulated by the CI protein, which represses the early lytic promoter PR and Cro that abolishes expression from the lysogenic promoter PL. Lysogens contain equivalent cI and cro‐gp25 mRNA concentrations, i.e., CI only partially represses PR, predicting a lytic cycle dominance. However,
Begoña Carrasco +3 more
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Regional Variation in Lytic and Lysogenic Viral Infection in the Southern Ocean and Its Contribution to Biogeochemical Cycling [PDF]
Applied and Environmental Microbiology, 2012 ABSTRACT Lytic and lysogenic viral infection was investigated throughout the Southern Ocean at sites spanning the sub-Antarctic zone, the Antarctic Circumpolar Current, and an Antarctic continental sea. Higher lytic virus activity was recorded in the more productive sub-Antarctic zone than in the iron-limited waters of the ...
Claire Evans, Corina P. D. Brussaard
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Molecular and biochemical analysis of the system regulating the lytic/lysogenic cycle in the pneumococcal temperate phage MM1 [PDF]
FEMS Microbiology Letters, 2003 The temperate phage MM1 forms stable lysogens in Streptococcus pneumoniae. We report here the first characterization of the lysogenic control region in Pneumococcus which contains two functional divergent promoters (P(R) and P(L)). MM1 encodes a 14-kDa cI protein (CI) that appears to be responsible for maintaining the lysogenic state in Pneumococcus ...
Virginia Obregà n +3 more
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Virology, 1999 Lysogenic induction of temperate bacteriophage A2 of Lactobacillus casei is controlled by the action of its cI and cro products at the phage operator region. Three 20-bp inverted repeated DNA segments (subsites O1, O2, and O3) and the two divergent (PL and PR) promoters were mapped within the 153-bp operator region.
Víctor Ladero +3 more
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The Induction of the Lytic Cycle in Lysogenic Bacteria by Phagolessin A 58 [PDF]
Journal of General Microbiology, 1956 SUMMARY: Phagolessin A58, an antibiotic having antiphage activity, was found to have an action which induced the lytic cycle in some strains of lysogenic bacteria. Four different lysogenic organisms were tested: Bacillus megaterium 899; Escherichia coli FCb; E. coli Temple; E. coli Lampert.
E. Hall-Asheshov, Igor N. Asheshov
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Virus Research, 2014 Expression of bacteriophage A2-encoded cro in Escherichia coli gives rise to two co-linear polypeptides, Cro and Cro*, which were proposed to form a regulatory tandem to modulate the frequency with which the phage would choose between the lytic and the lysogenic cycles. In this communication, it is reported that Cro is the canonical product of the gene
Susana Escobedo +4 more
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Bacteriophages in activated sludge bioreactor-role of lytic and lysogenic phage cycles
, 2012 Bacteriophages are viruses that infect bacteria and are known to be a very important component of microbial ecology in aquatic environments. Bacteria are involved in removing organics, ammonia and phosphorus in activated sludge processes. Frequent upsets, however, were found in the activated sludge process such as nitrification failure and filamentous ...
Jeongdong Choi
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Exploring the Lytic and Lysogenic Life Cycles of Bacteriophages
CourseSource, 2021 Jaimy Joy
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