doi: 10.1016/0167-4781(94)90298-4.
Formation of a hairpin structure by telomere 3' overhang
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- PMID: 8148384
- DOI: 10.1016/0167-4781(94)90298-4
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Formation of a hairpin structure by telomere 3' overhang
Biochim Biophys Acta.
.
Abstract
The telomeres of most eukaryotes contain tandemly-repeated DNA sequences, with a cluster of G residues on one strand. Recent studies showed that the Oxytricha telomeric DNA oligonucleotide, d(G4T4G4), dimerizes to form a quadruplex in the presence of Na+ or K+. We have observed that the oligonucleotide d(G4T4G4) does not dimerize in the presence of Li+ ion at low sample concentrations. In the monomeric state, this molecule forms a simple foldback hairpin structure containing G x G reverse Hoogsteen basepairs in the stem region. This hairpin structure has a thermal stability which is well reconciled with telomere functions in vivo.
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