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@ARTICLE{Toulmin:837797,
author = {Toulmin, A. and Baltierra-Jasso, L. E. and Morten, M. J.
and Sabir, T. and McGlynn, P. and Schröder, Gunnar and
Smith, B. O. and Magennis, S. W.},
title = {{C}onformational {H}eterogeneity in a {F}ully
{C}omplementary {DNA} {T}hree-{W}ay {J}unction with a
{GC}-{R}ich {B}ranchpoint.},
journal = {Biochemistry},
volume = {56},
number = {37},
issn = {0006-2960},
address = {Columbus, Ohio},
publisher = {American Chemical Society},
reportid = {FZJ-2017-06586},
pages = {4985–4991},
year = {2017},
abstract = {DNA three-way junctions (3WJs) are branched structures that
serve as important biological intermediates and as
components in DNA nanostructures. We recently derived the
global structure of a fully complementary 3WJ and found that
it contained unpaired bases at the branchpoint, which is
consistent with previous observations of branch flexibility
and branchpoint reactivity. By combining high-resolution
single-molecule Förster resonance energy transfer,
molecular modeling, time-resolved ensemble fluorescence
spectroscopy, and the first 19F nuclear magnetic resonance
observations of fully complementary 3WJs, we now show that
the 3WJ structure can adopt multiple distinct conformations
depending upon the sequence at the branchpoint. A 3WJ with a
GC-rich branchpoint adopts an open conformation with
unpaired bases at the branch and at least one additional
conformation with an increased number of base interactions
at the branchpoint. This structural diversity has
implications for branch interactions and processing in vivo
and for technological applications.},
cin = {ICS-6},
ddc = {570},
cid = {I:(DE-Juel1)ICS-6-20110106},
pnm = {551 - Functional Macromolecules and Complexes (POF3-551)},
pid = {G:(DE-HGF)POF3-551},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:28820590},
UT = {WOS:000411548900009},
doi = {10.1021/acs.biochem.7b00677},
url = {https://juser.fz-juelich.de/record/837797},
}