Fluorescent Protein Variants Generated by Reassembly between Skeleton and Chromophore

Area of Science:

• Biochemistry
• Molecular Biology
• Biotechnology

Background:

• Fluorescent proteins (FPs) are crucial intrinsic molecular tags for tracking live-cell dynamics.
• Generating a wide array of FP variants efficiently remains a significant challenge in biological research.

Purpose of the Study:

• To develop a computer-based parallel synthesis method for the massive generation of fluorescent protein variants.
• To reassemble chromophore and skeleton components of FPs using designed oligonucleotides.

Main Methods:

• Utilized DNAWorks for segmenting FP templates into overlapping oligonucleotides (20-43 mer).
• Optimized oligonucleotides for balanced annealing temperature, G+C content, and codon frequency.
• Synthesized designed oligonucleotides on photo-programmable microfluidic arrays.

Main Results:

• Demonstrated high reassembly rates of oligonucleotides through sequence analysis and induced expression of FPs.
• Characterized randomly selected FP variants, confirming distinct monomeric proteins with preserved photoactivity.
• Spectra, photostability, and molecular size analyses validated the functionality of the generated FP variants.

Conclusions:

• The computer-designed parallel synthesis approach provides an effective strategy for obtaining diverse fluorescent protein variants.
• This method facilitates the massive production of functional FP variants for advanced live-cell imaging and molecular tagging.