Host-hijacking and planktonic piracy: how phages command the microbial high seas.

Area of Science:

• Marine microbiology
• Viral ecology
• Biogeochemical cycles

Background:

• Marine microbial communities drive global biogeochemical cycles.
• Viruses are the most abundant biological entities in the ocean, significantly impacting microbial populations.
• Viral predation is a key factor influencing microbial community structure and function in nutrient-limited oceanic environments.

Purpose of the Study:

• To review the mechanisms by which bacteriophages (viruses) reconfigure host metabolism.
• To explore viral strategies for optimizing viral production and host fitness in diverse oceanic conditions.
• To highlight the broader implications of virus-host interactions for microbial ecology and biogeochemical processes.

Main Methods:

• Literature review of viral mechanisms for host metabolic reprogramming.
• Analysis of viral Auxiliary Metabolic Genes (AMGs) and their roles in host cell hijacking.
• Discussion of viral strategies, including 'plunder and pillage' versus 'batten down the hatches' approaches.

Main Results:

• Viruses utilize Auxiliary Metabolic Genes to redirect host resources for viral replication.
• Viral strategies range from resource exploitation to enhancing host fitness for survival.
• These interactions significantly alter microbial metabolism, substrate uptake, and community dynamics.

Conclusions:

• The traditional predator-prey model inadequately describes the complexity of virus-host interactions.
• Viral metabolic reprogramming plays a crucial role in marine biogeochemical cycles.
• Further research, including viral metagenomics and experimental validation, is needed to fully understand these processes and integrate them into global models.