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Updated: Sep 13, 2025

Phage Phenomics: Physiological Approaches to Characterize Novel Viral Proteins

Phage Phenomics: Physiological Approaches to Characterize Novel Viral Proteins

Published on: June 11, 2015

Optimizing phage strategies in competitive boom-bust environments.

Oskar Struer Lund¹, Kim Sneppen¹

¹University of Copenhagen, Niels Bohr Institute, Jagtvej 132, Copenhagen 2200, Denmark.

Physical Review. E

|August 1, 2025

Summary

Temperate phages, which can kill or integrate into host cells, survive better against competing phages by forming stable lysogens. Their survival strategy adapts to unstable conditions and phage competition.

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Area of Science:

Microbiology
Evolutionary Biology
Virology

Background:

Temperate phages exhibit a dual life cycle, either lysing host cells or integrating as prophages.
They face competition from virulent phages, particularly in resource-rich environments.
Temperate phage survival strategies are hypothesized to be adapted for fluctuating ecological conditions.

Purpose of the Study:

To investigate the decision-making processes of temperate phages regarding their life cycle (lysis vs. lysogeny).
To analyze how temperate phages compete against each other and against virulent phages.
To understand the evolutionary pressures shaping lysogeny frequency and stability.

Main Methods:

Simulations exploring temperate phage life-or-death decisions in isolation and competition.
Analysis of phage survival rates under varying environmental conditions and competitive pressures.
Modeling of lysogeny frequency and stability in the presence of competing phages.

Main Results:

Temperate phages with more stable lysogens demonstrate superior survival when competing with other temperate phages.
Competitive environments with temperate phages select for a reduced frequency of lysogeny.
Dosage-dependent lysogeny choice appears optimized for competition with phages exhibiting overlapping immunity.

Conclusions:

Temperate phage life cycle strategies are finely tuned for survival in unstable environments and against phage competition.
Lysogeny stability and frequency are critical factors influenced by competitive interactions and environmental conditions.
Temperate phages are outcompeted by virulent phages in environments with independent, fluctuating subsystems, highlighting the importance of phage dispersal dynamics.