Queuine: A Bacterial Nucleobase Shaping Translation in Eukaryotes.

Area of Science:

• Biochemistry
• Molecular Biology
• Nutritional Science

Background:

• Queuosine (Q) is a complex tRNA modification at the wobble position (34) of GUN anticodon tRNAs.
• Unlike bacteria, eukaryotes are auxotrophic for Q, requiring dietary intake or gut microbiota for acquisition.
• Q modification is crucial for accurate translation, influencing codon-anticodon pairing and translational speed.

Purpose of the Study:

• To review the cellular and organismal impacts of Q deficiency in eukaryotes.
• To discuss advancements in detecting Q modifications at single-base resolution.
• To explore potential biotechnological applications of the Q modification system.

Main Methods:

• Literature review of existing research on Q biosynthesis, function, and deficiency.
• Analysis of studies on eukaryotic auxotrophy for Q.
• Examination of emerging technologies for Q modification detection.
• Exploration of Q system applications in biotechnology.

Main Results:

• Q deficiency in eukaryotes is linked to impaired oxidative stress response, mitochondrial dysfunction, and protein folding issues.
• Q absence is associated with neurodegeneration, cancer, and inflammation.
• New technologies enable single-base resolution detection of Q modifications.
• The Q modification system shows promise for biotechnological applications.

Conclusions:

• Eukaryotic reliance on external Q sources underscores a critical nutritional link to translation.
• Q deficiency has profound cellular and organismal consequences, impacting health and disease.
• Advances in detection technologies and potential biotech applications highlight the significance of Q modification.