Stress response as implemented by hibernating ribosomes: a structural overview

Area of Science:

• Molecular Biology
• Microbiology
• Structural Biology

Background:

• Protein synthesis is an energy-intensive process crucial for cellular function.
• Ribosome dimerization into hibernation complexes is a key mechanism for regulating protein synthesis under stress.
• Hibernating promoting factor (HPF) and ribosome modulation factor (RMF) are involved in bacterial ribosome dimerization.

Purpose of the Study:

• To review bacterial ribosome dimerization mechanisms.
• To discuss how these mechanisms influence 100S complex structures.
• To explore the potential of targeting ribosome dimerization for antimicrobial drug development.

Main Methods:

• Review of recent advances in cryogenic electron microscopy (cryo-EM) studies of 100S complexes.
• Analysis of structural data to understand ribosome dimerization and inhibition of protein synthesis.
• Comparative analysis of different bacterial dimerization mechanisms.

Main Results:

• Detailed near-atomic resolution structures of 100S complexes reveal insights into dimerization.
• Different bacterial species employ distinct mechanisms for ribosome dimerization.
• Ribosomal dimerization is vital for bacterial survival, particularly under stress conditions.

Conclusions:

• Ribosome dimerization represents a conserved yet diverse bacterial survival strategy.
• The structural understanding of 100S complexes facilitates the design of novel antimicrobials.
• Targeting bacterial ribosome dimerization offers potential for species-specific antimicrobial therapies.