Aptamer
Aptamer — A short single-stranded DNA or RNA molecule that binds a specific target with high affinity, used as an alternative to antibodies in peptide detection.
What Is an Aptamer?
An aptamer is a short single-stranded DNA or RNA oligonucleotide that folds into a three-dimensional structure capable of binding a specific target with high affinity and specificity. Aptamers are selected through SELEX (Systematic Evolution of Ligands by EXponential enrichment), analogous to phage display for peptides. Peptide-aptamer hybrids and aptamer-peptide conjugates are emerging research tools.
Aptamers vs. Peptides
- Selection: SELEX (aptamers) vs. phage display/peptide libraries (peptides)
- Synthesis: Both produced by chemical synthesis. Aptamers by phosphoramidite chemistry, peptides by SPPS
- Stability: RNA aptamers are nuclease-sensitive (like peptides are protease-sensitive). Both require chemical modifications for in vivo use
Frequently Asked Questions
What is Aptamer?
A short single-stranded DNA or RNA molecule that binds a specific target with high affinity, used as an alternative to antibodies in peptide detection.
Why is Aptamer important in peptide research?
Aptamer is a fundamental concept in technology as it relates to peptide science. It directly influences experimental design, compound characterization, and the reliability of research outcomes across biochemistry and molecular biology disciplines.