A pause for thought along the co-translational folding pathway

Area of Science:

• Biochemistry
• Molecular Biology
• Structural Biology

Background:

• A comprehensive understanding of protein self-organization into functional 3D structures is lacking.
• Protein folding is primarily understood as a co-translational process.
• The role of messenger RNA (mRNA) beyond encoding amino acid sequences in protein folding is under investigation.

Purpose of the Study:

• To explore the potential of mRNA as a regulatory element in protein folding.
• To investigate the influence of translation kinetics on co-translational protein folding pathways.
• To understand how translational pausing affects the folding of nascent polypeptides.

Main Methods:

• Review of recent experimental findings.
• Analysis of theoretical in silico modeling studies.

Main Results:

• Evidence suggests mRNA contains additional information that modulates in vivo protein folding.
• Translation kinetics appear to direct the co-translational folding pathway.
• Translational pausing at rare codons may facilitate sequential folding of polypeptide segments.

Conclusions:

• Messenger RNA (mRNA) may play a crucial role in fine-tuning protein folding.
• Translation kinetics and pausing are potential mechanisms for regulating co-translational protein folding.
• A new conceptual framework integrating mRNA information and translation dynamics may be needed for understanding protein self-organization.