i-Motif DNA: structural features and significance to cell biology

H Abou Assi, M Garavís, C González… - Nucleic acids …, 2018 - academic.oup.com
The i-motif represents a paradigmatic example of the wide structural versatility of nucleic
acids. In remarkable contrast to duplex DNA, i-motifs are four-stranded DNA structures held …

DNA quadruple helices in nanotechnology

JL Mergny, D Sen - Chemical Reviews, 2019 - ACS Publications
DNA has played an early and powerful role in the development of bottom-up
nanotechnologies, not least because of DNA's precise, predictable, and controllable …

Genome-wide map** of i-motifs reveals their association with transcription regulation in live human cells

I Zanin, E Ruggiero, G Nicoletto, S Lago… - Nucleic Acids …, 2023 - academic.oup.com
Abstract i-Motifs (iMs) are four-stranded DNA structures that form at cytosine (C)-rich
sequences in acidic conditions in vitro. Their formation in cells is still under debate. We …

I-motif DNA structures are formed in the nuclei of human cells

M Zeraati, DB Langley, P Schofield, AL Moye… - Nature …, 2018 - nature.com
Human genome function is underpinned by the primary storage of genetic information in
canonical B-form DNA, with a second layer of DNA structure providing regulatory control. I …

Mass spectrometry of nucleic acid noncovalent complexes

E Largy, A Konig, A Ghosh, D Ghosh… - Chemical …, 2021 - ACS Publications
Nucleic acids have been among the first targets for antitumor drugs and antibiotics. With the
unveiling of new biological roles in regulation of gene expression, specific DNA and RNA …

Evaluation of the stability of DNA i‐Motifs in the nuclei of living mammalian cells

S Dzatko, M Krafcikova… - Angewandte Chemie …, 2018 - Wiley Online Library
C‐rich DNA has the capacity to form a tetra‐stranded structure known as an i‐motif. The i‐
motifs within genomic DNA have been proposed to contribute to the regulation of DNA …

pH-dependent cap** interactions induce large-scale structural transitions in i-motifs

I Serrano-Chacón, B Mir, L Cupellini… - Journal of the …, 2023 - ACS Publications
We study here a DNA oligonucleotide having the ability to form two different i-motif structures
whose relative stability depends on pH and temperature. The major species at neutral pH is …

The i-motif as a molecular target: more than a complementary DNA secondary structure

SL Brown, S Kendrick - Pharmaceuticals, 2021 - mdpi.com
Stretches of cytosine-rich DNA are capable of adopting a dynamic secondary structure, the i-
motif. When within promoter regions, the i-motif has the potential to act as a molecular switch …

Stability prediction of canonical and non-canonical structures of nucleic acids in various molecular environments and cells

S Takahashi, N Sugimoto - Chemical Society Reviews, 2020 - pubs.rsc.org
Nucleic acids (DNA and RNA) dynamically fold and unfold to exert their functions in cells.
These folding and unfolding behaviours are also the basis for various technical applications …

Thermal and pH stabilities of i‐DNA: confronting in vitro experiments with models and in‐cell NMR data

M Cheng, D Qiu, L Tamon, E Ištvánková… - Angewandte Chemie …, 2021 - Wiley Online Library
Recent studies indicate that i‐DNA, a four‐stranded cytosine‐rich DNA also known as the i‐
motif, is actually formed in vivo; however, a systematic study on sequence effects on stability …