4.7 Article

Molecular crowding of the cosolutes induces an intramolecular i-motif structure of triplet repeat DNA oligomers at neutral pH

Journal

CHEMICAL COMMUNICATIONS
Volume 46, Issue 8, Pages 1299-1301

Publisher

ROYAL SOC CHEMISTRY
DOI: 10.1039/b922050j

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Funding

  1. Ministry of Education, Culture, Sports, Science and Technology, Japan
  2. Hirao Taro Foundation of the Konan University Association for Academic Research
  3. Grants-in-Aid for Scientific Research [21245040] Funding Source: KAKEN

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We now present the first example in which triplet repeat DNAs adopt the i-motif structure at neutral pH by molecular crowding. Crowding stabilized the i-motif and the pK(a) of N3 of cytosine was raised in such a microenvironment. Molecular crowding is known to accelerate the formation of the multi-stranded i-motif while the triplet repeats adopt the single-strand structure.

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