- Synthesis of 2-oxoglutarate derivatives and their evaluation as cosubstrates and inhibitors of human aspartate/asparagine-β-hydroxylase
-
2-Oxoglutarate (2OG) is involved in biological processes including oxidations catalyzed by 2OG oxygenases for which it is a cosubstrate. Eukaryotic 2OG oxygenases have roles in collagen biosynthesis, lipid metabolism, DNA/RNA modification, transcriptional regulation, and the hypoxic response. Aspartate/asparagine-β-hydroxylase (AspH) is a human 2OG oxygenase catalyzing post-translational hydroxylation of Asp/Asn-residues in epidermal growth factor-like domains (EGFDs) in the endoplasmic reticulum. AspH is of chemical interest, because its Fe(ii) cofactor is complexed by two rather than the typical three residues. AspH is upregulated in hypoxia and is a prognostic marker on the surface of cancer cells. We describe studies on how derivatives of its natural 2OG cosubstrate modulate AspH activity. An efficient synthesis of C3- and/or C4-substituted 2OG derivatives, proceedingviacyanosulfur ylid intermediates, is reported. Mass spectrometry-based AspH assays with >30 2OG derivatives reveal that some efficiently inhibit AspHviacompeting with 2OG as evidenced by crystallographic and solution analyses. Other 2OG derivatives can substitute for 2OG enabling substrate hydroxylation. The results show that subtle changes,e.g.methyl- to ethyl-substitution, can significantly alter the balance between catalysis and inhibition. 3-Methyl-2OG, a natural product present in human nutrition, was the most efficient alternative cosubstrate identified; crystallographic analyses reveal the binding mode of (R)-3-methyl-2OG and other 2OG derivatives to AspH and inform on the balance between turnover and inhibition. The results will enable the use of 2OG derivatives as mechanistic probes for other 2OG utilizing enzymes and suggest 2-oxoacids other than 2OG may be employed by some 2OG oxygenasesin vivo.
- Brewitz, Lennart,Nakashima, Yu,Schofield, Christopher J.
-
p. 1327 - 1342
(2021/02/12)
-
- Visible-Light-Enabled Paternò-Büchi Reaction via Triplet Energy Transfer for the Synthesis of Oxetanes
-
One of the most efficient ways to synthesize oxetanes is the light-enabled [2 + 2] cycloaddition reaction of carbonyls and alkenes, referred to as the Paternò-Büchi reaction. The reaction conditions for this transformation typically require the use of hig
- Rykaczewski, Katie A.,Schindler, Corinna S.
-
supporting information
p. 6516 - 6519
(2020/09/02)
-
- A facile aerobic copper-catalyzed α-oxygenation of aryl thioacetamides: An efficient access to α-keto aryl thioamides
-
Copper(II) efficiently catalyzes the aerobic oxidation of aryl thioacetamides into the corresponding α-keto aryl thioamides in moderate to high yields in the presence of K2CO3 under O 2 atmosphere. This protocol is simple, clean, and generates water as the only byproduct. A mechanism is proposed for the reaction course. Georg Thieme Verlag Stuttgart.
- Moghaddam, Firouz Matloubi,Mirjafary, Zohreh,Saeidian, Hamdollah,Javan, Marjan Jebeli
-
p. 892 - 896
(2008/12/22)
-
- HYDROXYALKYLARYLAMIDE DERIVATIVES
-
The present invention relates to a novel class of hydroxyalkylarylamide derivatives. The instant compounds can be used to treat cancer. The fluorinated arylamide derivatives can also inhibit histone deacetylase and are suitable for use in selectively indu
- -
-
Page/Page column 55
(2008/06/13)
-
- FLUORINATED ARYLAMIDE DERIVATIVES
-
The present invention relates to a novel class of fluorinated arylamide derivatives. The instant compounds can be used to treat cancer. The fluorinated arylamide derivatives can also inhibit histone deacetylase and are suitable for use in selectively indu
- -
-
Page/Page column 77
(2008/06/13)
-
- HISTONE DEACETYLASE INHIBITORS WITH ARYL-PYRAZOLYL MOTIFS
-
The present invention relates to a novel class of histone deacetylase inhibitors with aryl-pyrazolyl motifs. The compounds of this invention can be used to treat cancer. The compounds of this invention are suitable for use in selectively inducing terminal
- -
-
Page/Page column 71
(2008/06/13)
-