Genetic code flexibility in microorganisms: novel mechanisms and impact on physiology

Area of Science:

• Microbiology
• Genetics
• Molecular Biology

Background:

• The genetic code was historically considered universal and immutable.
• Recent advances in sequencing, biochemistry, bioinformatics, and structural biology have revealed significant variations.
• These variations include biased codon usage, codon reassignment, ambiguous decoding, and recoding.

Purpose of the Study:

• To review the prevalence, evolution, and mechanistic basis of genetic code variations in microorganisms.
• To discuss the physiological implications of genetic code flexibility in microbes.

Main Methods:

• Review of recent literature in genome sequencing, biochemistry, bioinformatics, and structural biology.
• Analysis of data on genetic code variations in microbial systems.
• Discussion of evolutionary and mechanistic aspects.

Main Results:

• Genetic code variations are prevalent in microorganisms.
• These variations have evolved through various mechanisms.
• Genetic code flexibility demonstrably affects microbial physiology.

Conclusions:

• The genetic code exhibits substantial flexibility, particularly in microorganisms.
• Understanding these variations is crucial for comprehending microbial life and evolution.
• Genetic code flexibility plays a key role in microbial adaptation and function.