Synthesis of peptide-oligonucleotide conjugates: application to basic peptides.

Area of Science:

• Bioconjugation Chemistry
• Molecular Biology
• Drug Delivery Systems

Background:

• Peptide-oligonucleotide conjugates are crucial tools for studying cellular uptake mechanisms.
• Existing synthesis methods for these conjugates can be inefficient, particularly for basic peptides.
• Development of streamlined and versatile conjugation techniques is required.

Purpose of the Study:

• To enhance existing "native ligation" methods for synthesizing peptide-oligonucleotide conjugates, extending their applicability to basic peptides.
• To develop a novel, fully solid-phase synthesis strategy for creating these conjugates.
• To provide researchers with more efficient tools for creating peptide-oligonucleotide conjugates for biological studies.

Main Methods:

• Improvements to solution-phase "native ligation" for conjugating basic peptides with oligonucleotides.
• Development of a total solid-phase synthesis approach utilizing a L-homoserine linker.
• Sequential solid-phase synthesis of both oligonucleotide and peptide chains on a single support.

Main Results:

• Successful adaptation of "native ligation" to include basic peptides, broadening its utility.
• Demonstration of a novel, integrated solid-phase synthesis strategy for peptide-oligonucleotide conjugates.
• The L-homoserine linker proved effective in facilitating sequential chain growth on a single solid support.

Conclusions:

• The presented methods offer significant improvements in the synthesis of peptide-oligonucleotide conjugates.
• These advancements facilitate the creation of conjugates for cell culture uptake studies.
• The developed solid-phase approach represents a key step towards more accessible and efficient conjugate synthesis.