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Experimental detection of conformational transitions between forms of DNA: problems and prospects

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Abstract

Under different conditions, the DNA double helix can take different geometric forms. Of the large number of its conformations, in addition to the “canonical” B form, the A, C, and Z forms are widely known, and the D, Hoogsteen, and X forms are less known. DNA locally takes the A, C, and Z forms in the cell, in complexes with proteins. We compare different methods for detecting non-canonical DNA conformations: X-ray, IR, and Raman spectroscopy, linear and circular dichroism in both the infrared and ultraviolet regions, as well as NMR (measurement of chemical shifts and their anisotropy, scalar and residual dipolar couplings and inter-proton distances from NOESY (nuclear Overhauser effect spectroscopy) data). We discuss the difficulties in applying these methods, the problems of theoretical interpretation of the experimental results, and the prospects for reliable identification of non-canonical DNA conformations.

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Abbreviations

2D:

Two-dimensional

3D:

Three-dimensional

A (a), T (t), G (g), C (c) in DNA sequences:

Adenine, thymine, guanine, cytosine

a.s.:

Additional salt

AFH:

Anti-ferromagnetic Heisenberg

AFI:

Anti-ferromagnetic Ising

AFP:

Anti-ferromagnetic Potts

asym:

Antisymmetric

C:

Carbon

Ca:

Calcium

Cd:

Cadmium

CD:

Circular dichroism

chem.shift:

Chemical shift

Cl:

Chloride

Co:

Cobalt

Cr:

Chromium

cryo-EM:

Cryogenic electron microscopy

Cs:

Cesium

CSA:

Chemical shift anisotropy

DFT:

Density functional theory

DNA:

Deoxyribonucleic acid

ECD:

Electronic circular dichroism

eNOE:

Exact nuclear Overhauser effect

F:

FluorideFM - ferromagnetic

Freq.:

Frequency

GAFF:

General AMBER force field

H:

Hydrogen

IR:

Infrared

K:

Potassium

KDNA:

Deoxyribonucleic acid potassium salt

LD:

Linear dichroism

LD\(^r\) :

Reduced linear dichroism

LiDNA:

Deoxyribonucleic acid lithium salt

MD:

Molecular dynamics

Mg:

Magnesium

MG:

Major groove width

mG:

Minor groove width

MM:

Molecular mechanics

Mn:

Manganese

N:

Nitrogen

Na:

Sodium

NaDNA:

Deoxyribonucleic acid sodium salt

Ni:

Nickel

NMR:

Nuclear magnetic resonance

NOE:

Nuclear Overhauser effect

NOESY:

Nuclear Overhauser effect spectroscopy

O:

Oxygen

O-P-O:

group of DNA atoms O3’-P-O5’

P:

Phosphorus

PDB:

Protein data bank

pH:

Pondus Hydrogenii

PSI, \(\psi \) :

Polymer and Salt Induced

r.h.:

Relative humidity

Rb:

Rubidium

RDC:

Residual dipolar coupling

RNA:

Ribonucleic acid

ROA:

Raman optical activity

sym:

Symmetric

T[MYAMP:

F] Taylor & Francis

Tb:

Terbium

TD-DFT:

Time-dependent density functional theory

Tl:

Thallium

U:

Purine

UV:

Ultraviolet

VCD:

Vibrational circular dichroism

VMD:

Visual molecular dynamics

Y:

Pyrimidine

References

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Acknowledgements

The authors thank Natalya A. Kovaleva for her work in the laboratory on literature search and for technical assistance in preparing Figs. 1, 5, 6, and 8.

Funding

This work was supported by the Program of Fundamental Researches of the Russian Academy of Sciences (project FFZE-2022-0009, registration number 122040500069-7).

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Authors

Contributions

The review conception and design belong to EAZ. Literature search and analysis were performed by both authors. IAS carried out the PDB data analysis. The first draft of the manuscript was written by EAZ; IAS commented on all the versions of the manuscript, and he also read and approved the final version.

Corresponding author

Correspondence to Elena A. Zubova.

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The authors declare no competing interests.

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Zubova, E.A., Strelnikov, I.A. Experimental detection of conformational transitions between forms of DNA: problems and prospects. Biophys Rev 15, 1053–1078 (2023). https://doi.org/10.1007/s12551-023-01143-9

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