Development of Uniform Ribosome Display Technology Enabling Easy and Efficient Identification of Full-Length Proteins...

Area of Science:

• Biochemistry
• Molecular Biology
• Proteomics

Background:

• Identifying protein targets of bioactive molecules is crucial for understanding drug mechanisms.
• Current methods for target identification can be complex and require deep sequencing.

Purpose of the Study:

• To develop and validate a uniform ribosome display technology for improved target identification.
• To enable efficient identification of full-length proteins interacting with small and large bioactive molecules.

Main Methods:

• Utilized equal-length DNA and mRNA for synthesizing full-length protein-ribosome-mRNA complexes.
• Performed uniform ribosome display selections with dihydrofolate reductase and haloalkane dehalogenase mutant.
• Tested the technology's ability to identify target proteins from complex pools, even with low mRNA representation.

Main Results:

• Demonstrated specific selection of target protein-displaying ribosomal complexes through molecular interactions.
• Successfully identified target proteins (e.g., dihydrofolate reductase, proteins interacting with anti-DDX46 antibody) with high precision.
• Showcased precise identification even when target mRNA constituted only 1/20,000 of the total pool.

Conclusions:

• The uniform ribosome display technology offers an efficient and simplified approach for target protein identification.
• This method accurately identifies interacting proteins with bioactive molecules without the need for deep sequencing.
• The technology has broad applicability for discovering interactions with both small and large bioactive molecules.