Capturing Intermediates in the Reaction Catalyzed by NosN, a Class C Radical <i>S</i>-Adenosylmethionine Methylase Involved in the Biosynthesis of the Nosiheptide Side-Ring System
作者:Bo Wang、Joseph W. LaMattina、Savannah L. Marshall、Squire J. Booker
DOI:10.1021/jacs.8b13157
日期:2019.4.10
of Glu6 of the core peptide and the nascent C1 unit. However, exactly when NosN performs its function during the biosynthesis of nosiheptide is unknown. Herein, we report the syntheses and use of three peptidemimics as potential substrates designed to address the timing of NosN's function. Our results show that NosN clearly closes the side ring before NosO forms the pyridine ring and most likely before
compound 19 with a novel indole-2-carboxamide hinge scaffold. Compound 19 displays potent anti-ASK1 kinase activity and stronger inhibitory effect on ASK1 in AP1-HEK293 cells than previously described ASK1 inhibitor GS-4997. Besides improved in vitro activity, compound 19 also exhibits an appropriate in vivo PK profile. In a dextran sulfate sodium (DSS)-induced mouse model of ulcerativecolitis (UC), compound
Drug Design, in Vitro Pharmacology, and Structure−Activity Relationships of 3-Acylamino-2-aminopropionic Acid Derivatives, a Novel Class of Partial Agonists at the Glycine Site on the <i>N</i>-Methyl-<scp>d</scp>-aspartate (NMDA) Receptor Complex
作者:Stephan Urwyler、Philipp Floersheim、Bernard L. Roy、Manuel Koller
DOI:10.1021/jm900363q
日期:2009.8.27
Retaining agonistic activity at the glycine coagonist site of the NMDA receptor in molecules derived from glycine or D-serine has proven to be difficult because in the vicinity of the alpha-amino acid group little substitution is tolerated. We have solved this problem by replacing the hydroxy group of D-serine with an amido group, thus keeping the hydrogen donor function and allowing For further substitution and exploration of the adjacent space. Heterocyclic substitutions resulted in a series of 3-acylamino-2-aminopropionic acid derivatives, with high affinities in a binding assay for the glycine site. In a functional assay assessing the activation of the glycine site, these compounds displayed a wide range of intrinsic efficacies, from antagonism to a high degree of partial agonism. Structure-activity relationships reveal that lipophilic substituents, presumably filling an additional hydrophobic pocket, are accepted by the glycine site, provided that they are separated from the alpha-amino acid group by a short linker.
Using Peptide Mimics to Study the Biosynthesis of the Side-Ring System of Nosiheptide
作者:Bo Wang、Joseph W. LaMattina、Edward D. Badding、Lauren K. Gadsby、Tyler L. Grove、Squire J. Booker
DOI:10.1016/bs.mie.2018.06.005
日期:——
Hiremath, Shivayogi P.; Bajji, Ashok C.; Biradar, Jaiprakash S., Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1988, vol. 27, # 1-12, p. 756 - 757
作者:Hiremath, Shivayogi P.、Bajji, Ashok C.、Biradar, Jaiprakash S.