G-Quadruplex Secondary Structure Obtained from Circular Dichroism Spectroscopy.
Angew Chem Int Ed Engl
; 57(24): 7171-7175, 2018 06 11.
Article
in En
| MEDLINE
| ID: mdl-29076232
ABSTRACT
A curated library of circular dichroism spectra of 23â
G-quadruplexes of known structure was built and analyzed. The goal of this study was to use this reference library to develop an algorithm to derive quantitative estimates of the secondary structure content of quadruplexes from their experimental CD spectra. Principal component analysis and singular value decomposition were used to characterize the reference spectral library. CD spectra were successfully fit to obtain estimates of the amounts of base steps in anti-anti, syn-anti or anti-syn conformations, in diagonal or lateral loops, or in other conformations. The results show that CD spectra of nucleic acids can be analyzed to obtain quantitative structural information about secondary structure content in an analogous way to methods used to analyze protein CD spectra.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
DNA
/
Circular Dichroism
/
G-Quadruplexes
Language:
En
Journal:
Angew Chem Int Ed Engl
Year:
2018
Document type:
Article
Affiliation country:
United States