SIRT1 is an NAD(+)-dependent deacetylase, whose activators have potential therapeutic applications in age-related diseases. Here we report a new class of SIRT1 activators. The activation is dependent on the fluorophore labeled to the substrate. To elucidate the activation mechanism, we solved the crystal structure of SIRT3/ac-RHKKac-AMC complex. The structure revealed that the fluorophore blocked the H-bond formation and created a cavity between the substrate and the Rossmann fold. We built the SIRT1/ac-RHKKac-AMC complex model based on the crystal structure. K-m and K-d determinations demonstrated that the fluorophore decreased the peptide binding affinity. The binding modes of SIRT1 activators indicated that a portion of the activators interacts with the fluorophore through pi-stacking, while the portion inserts into the cavity or interacts with the Rossmann fold, thus increasing the substrate affinity. Our study provides new insights into the mechanism of SIRT1 activation and may aid the design of novel SIRT1 activators.
[EN] 5-ARYL-1,3,4-OXADIAZOLE-2-AMINES AS NICOTINIC ACETYLCHOLINE RECEPTOR AGONISTS<br/>[FR] 5-ARYL-L, 1 3, 4-OXADIAZOLE-2-AMINES UTILISÉES COMME AGONISTES DU RÉCEPTEUR D'ACÉTYLCHOLINE NICOTINIQUE
申请人:GLAXO GROUP LTD
公开号:WO2009071576A1
公开(公告)日:2009-06-11
The present invention relates to novel oxadiazole derivatives having pharmacological activity, processes for their preparation, compositions containing them and their use in the treatment of neurological, psychiatric disorders and gastrointestinal disorders. wherein R1 and R2 independently represent hydrogen, C1-6 alkyl or C3-6 cycloalkyl; or R1 and R2 together with the nitrogen atom to which they are attached form a nitroge containing heterocyclyl group which is unsubstituted or substituted with 1, 2, or 3 substituents selected from methyl or fluoro; Q represents -(CH2)n- wherein n represents 3 or 4; A represents a phenyl ring and B represents a 5 or 6 membered heteroaryl ring or B represents a phenyl ring and A represents a 5 or 6 membered heteroaryl ring; R3 and R4 independently represent C1-6 alkyl, C1-6 alkoxy and halo; t and m independently represent an integer from 0 to 3. Compounds of formula (I) and their pharmaceutically acceptable salts may have affinity for and be agonists at the nicotinic α7 receptor and are believed to be of potential use in the treatment of neurological diseases including Alzheimer's disease.
Identification of novel benzoyl hydrazine derivatives as activators of neddylation pathway to inhibit the tumor progression in vitro
作者:Xuan Wang、Sumeng Guan、Zunming Tian、Mei Zhao、Mengyu Li、Hua Yang、Ling Zhu、Moran Sun
DOI:10.1007/s00044-024-03193-4
日期:2024.3
against A549, MGC-803, MCF-7KYSE-30 cell lines. The cell-based mechanistic studies showed that IIb-10 bearing the benzoyl hydrazine motif can selectively inhibit the Neddylation modification of Cullin1 and Cullin3 by inhibiting NEDD8 activase and then, leads to a dose-dependent reduction in the level of UBC12-NEDD8 complex via interacting with NAE1 directly. Cellular mechanisms elucidated that compound