» Articles » PMID: 9990053

Triplet Repeats Form Secondary Structures That Escape DNA Repair in Yeast

Overview
Specialty Science
Date 1999 Feb 17
PMID 9990053
Citations 81
Authors
Affiliations
Soon will be listed here.
Abstract

Several human neurodegenerative diseases result from expansion of CTG/CAG or CGG/CCG triplet repeats. The finding that single-stranded CNG repeats form hairpin-like structures in vitro has led to the hypothesis that DNA secondary structure formation is an important component of the expansion mechanism. We show that single-stranded DNA loops containing 10 CTG/CAG or CGG/CCG repeats are inefficiently repaired during meiotic recombination in Saccharomyces cerevisiae. Comparisons of the repair of DNA loops with palindromic and nonpalindromic sequences suggest that this inefficient repair reflects the ability of these sequences to form hairpin structures in vivo.

Citing Articles

Structural and Dynamical Properties of Nucleic Acid Hairpins Implicated in Trinucleotide Repeat Expansion Diseases.

Pan F, Xu P, Roland C, Sagui C, Weninger K Biomolecules. 2024; 14(10).

PMID: 39456210 PMC: 11505666. DOI: 10.3390/biom14101278.


Huntington disease update: new insights into the role of repeat instability in disease pathogenesis.

Arning L, Nguyen H Med Genet. 2024; 33(4):293-300.

PMID: 38835439 PMC: 11006308. DOI: 10.1515/medgen-2021-2101.


Recent Advances in DNA Nanomaterials.

Bekkouche I, Kuznetsova M, Rejepov D, Vetcher A, Shishonin A Nanomaterials (Basel). 2023; 13(17).

PMID: 37686956 PMC: 10490369. DOI: 10.3390/nano13172449.


Site-specific R-loops induce CGG repeat contraction and fragile X gene reactivation.

Lee H, Imaichi S, Kraeutler E, Aguilar R, Lee Y, Sheridan S Cell. 2023; 186(12):2593-2609.e18.

PMID: 37209683 PMC: 11505655. DOI: 10.1016/j.cell.2023.04.035.


Low Complexity Regions in Proteins and DNA are Poorly Correlated.

Enright J, Dickson Z, Golding G Mol Biol Evol. 2023; 40(4).

PMID: 37036379 PMC: 10124876. DOI: 10.1093/molbev/msad084.


References
1.
Sinden R, Wells R . DNA structure, mutations, and human genetic disease. Curr Opin Biotechnol. 1992; 3(6):612-22. DOI: 10.1016/0958-1669(92)90005-4. View

2.
Detloff P, White M, Petes T . Analysis of a gene conversion gradient at the HIS4 locus in Saccharomyces cerevisiae. Genetics. 1992; 132(1):113-23. PMC: 1205110. DOI: 10.1093/genetics/132.1.113. View

3.
Bollag R, Elwood D, Tobin E, Godwin A, Liskay R . Formation of heteroduplex DNA during mammalian intrachromosomal gene conversion. Mol Cell Biol. 1992; 12(4):1546-52. PMC: 369596. DOI: 10.1128/mcb.12.4.1546-1552.1992. View

4.
Perkins D . Biochemical Mutants in the Smut Fungus Ustilago Maydis. Genetics. 1949; 34(5):607-26. PMC: 1209467. DOI: 10.1093/genetics/34.5.607. View

5.
Nag D, Petes T . Seven-base-pair inverted repeats in DNA form stable hairpins in vivo in Saccharomyces cerevisiae. Genetics. 1991; 129(3):669-73. PMC: 1204734. DOI: 10.1093/genetics/129.3.669. View