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@ARTICLE{Schtt:646213,
author = {Schütt, Isabell and Einwohlt, Philip and Wandinger,
Anna-Maria and Teuffel, Jonathan and Wirsing, Regina and
Hlawatschke, Ben H. and Fehlauer, Hanna L. and Bothe,
Sebastian and Bader, Nicole and Monaci, Emanuele and
Kreikemeyer, Bernd and Schindelin, Hermann and Wade, Rebecca
C. and Fiedler, Tomas},
title = {{I}nhibitors of {G}ap{N}-dependent {NADPH} supply as
potential lead compounds for novel therapeutics against
{S}treptococcus pyogenes},
journal = {Virulence},
volume = {17},
number = {1},
issn = {2150-5594},
address = {Austin, Tex.},
publisher = {Landes Bioscience},
reportid = {PUBDB-2026-00758},
pages = {2609393},
year = {2026},
abstract = {Infections with Streptococcus pyogenes are among the most
important diseases caused by bacteria and are responsible
for around 500,000 deaths every year. In 2024,
macrolide-resistant S. pyogenes was added to the WHO’s
list of priority pathogens. The non-phosphorylating
glyceraldehyde-3-phosphate dehydrogenase GapN has been
identified as a potential drug target in S. pyogenes.
SpyGapN is the major NADP-reducing enzyme in these bacteria
as they lack the oxidative part of the pentose phosphate
pathway. In this study, in silico docking of compound
libraries to the glyceraldehyde 3-phosphate binding pocket
of SpyGapN was used to screen for potential competitive
inhibitors. Among the candidates identified with this
approach, 1,2-dihydroxyethane-1,2-disulfonate (glyoxal
bisulfite) showed the strongest inhibition of SpyGapN
activity in vitro. In a complementary approach,
crystallographic fragment screening was conducted, which
identified the ultra-low-molecular-weight compounds
pyrimidine-5-amine and 4-hydroxypyridazine targeting the
cofactor-binding pocket of SpyGapN. Both
low-molecular-weight compounds were experimentally confirmed
to inhibit the activity of purified SpyGapN. Combinations of
glyoxal bisulfite with either pyrimidine-5-amine or
4-hydroxypyridazine enhanced the inhibitory effect of
SpyGapN. Glyoxal bisulfite was able to kill S. pyogenes.
This effect was accelerated by combining glyoxal bisulfite
with 4-hydroxypyridazine. While these findings suggest that
inhibition of SpyGapN probably contributes to the observed
antibacterial activity, the exact mechanism of action
remains to be confirmed, as the compounds also affect other
G3P-converting enzymes. Nevertheless, these compounds
provide a promising starting point for the development of
more specific SpyGapN inhibitors.},
cin = {EMBL-User},
ddc = {610},
cid = {I:(DE-H253)EMBL-User-20120814},
pnm = {6G3 - PETRA III (DESY) (POF4-6G3)},
pid = {G:(DE-HGF)POF4-6G3},
experiment = {EXP:(DE-H253)P-P13-20150101},
typ = {PUB:(DE-HGF)16},
doi = {10.1080/21505594.2025.2609393},
url = {https://bib-pubdb1.desy.de/record/646213},
}