In vitro selection of ATP-binding receptors using a ribonucleopeptide complex

Area of Science:

• Molecular Biology
• Biochemistry
• Structural Biology

Background:

• Ribosomes showcase the diverse structures of RNA-protein complexes.
• Artificial receptors are crucial for molecular recognition and drug design.

Purpose of the Study:

• To design a new class of artificial receptors using peptide-RNA complexes.
• To create a specific ribonucleopeptide receptor for adenosine triphosphate (ATP).

Main Methods:

• Designed a scaffold combining a short peptide and RNA with a randomized nucleotide region.
• Utilized the HIV-1 Rev response element for ribonucleopeptide pool formation.
• Employed in vitro selection to isolate RNA oligonucleotides with specific binding properties.

Main Results:

• Successfully generated a ribonucleopeptide receptor with high specificity for ATP.
• The identified ATP-binding ribonucleopeptide sequence differed from known ATP aptamers.
• ATP binding was dependent on the presence of the Rev peptide and modulated by its amino acid substitutions.

Conclusions:

• The peptide component is integral to the functional structure of the RNA receptor.
• Amino acids outside the RNA-binding region of the peptide influence ATP binding.
• This approach offers a strategy for designing custom ribonucleopeptide receptors and enzymes.