Virtual Ligand Screening of the p300/CBP Histone Acetyltransferase: Identification of a Selective Small Molecule Inhibitor
摘要:
The histone acetyltransferase (HAT) p300/CBP is a transcriptional coactivator implicated in many gene regulatory pathways and protein acetylation events. Although p300 inhibitors have been reported, a potent, selective, and readily available active-site-directed small molecule inhibitor is not yet known. Here we use a structure-based, in silico screening approach to identify a commercially available pyrazolone-containing small molecule p300 HAT inhibitor, C646. C646 is a competitive p300 inhibitor with a K-i of 400 nM and is selective versus other acetyltransferases. Studies on site-directed p300 HAT mutants and synthetic modifications of C646 confirm the importance of predicted interactions in conferring potency. Inhibition of histone acetylation and cell growth by C646 in cells validate its utility as a pharmacologic probe and suggest that p300/CBP HAT is a worthy anticancer target.
Virtual Ligand Screening of the p300/CBP Histone Acetyltransferase: Identification of a Selective Small Molecule Inhibitor
摘要:
The histone acetyltransferase (HAT) p300/CBP is a transcriptional coactivator implicated in many gene regulatory pathways and protein acetylation events. Although p300 inhibitors have been reported, a potent, selective, and readily available active-site-directed small molecule inhibitor is not yet known. Here we use a structure-based, in silico screening approach to identify a commercially available pyrazolone-containing small molecule p300 HAT inhibitor, C646. C646 is a competitive p300 inhibitor with a K-i of 400 nM and is selective versus other acetyltransferases. Studies on site-directed p300 HAT mutants and synthetic modifications of C646 confirm the importance of predicted interactions in conferring potency. Inhibition of histone acetylation and cell growth by C646 in cells validate its utility as a pharmacologic probe and suggest that p300/CBP HAT is a worthy anticancer target.
Compounds are disclosed of general formula (I): ##STR1## wherein R.sub.1 and R.sub.2 each independently represents a hydrogen atom, or an aryl, aralkyl, cycloalkyl, fluoroalkyl or alkyl group, which alkyl group is optionally substituted by an alkenyl group or by a group -OR.sub.7 or by ##STR2## where R.sub.7 and R.sub.8 each independently represents a hydrogen atom, an alkyl, aryl or aralkyl group; or R.sub.1 and R.sub.2 together with the nitrogen atom to which they are attached form a saturated monocyclic 5 to 7 membered ring which may contain a further hetero function (viz--O--, --NH or ##STR3## R.sub.3 and R.sub.4 have the same meanings as R.sub.1 and R.sub.2 and may together form an aralkylidene group; R.sub.5 represents a hydrogen atom or an alkyl or aralkyl group; R.sub.6 represents a hydrogen atom or an aryl or C.sub.1 -C.sub.3 alkyl group; Alk represents an C.sub.1 -C.sub.4 alkylene group optionally substituted at one or more of its carbon atoms by one to three C.sub.1 -C.sub.3 alkyl groups; and X represents an oxygen or sulphur atom, and its physiologically acceptable salts, hydrates and bioprecursors. The indoles (I) may be prepared by combinations of reactions to introduce the desired substituents into suitable intermediates either before or after cyclization to form the indole nucleus. The compounds have selective actions on blood vessels and, in particular exhibit antihypertensive properties. They may be formulated in conventional manner as pharmaceutical compositions.
[EN] A PROCESS FOR THE PREPARATION OF FROVATRIPTAN AND FROVATRIPTAN SUCCINATE AND THEIR SYNTHETIC INTERMEDIATES<br/>[FR] PROCÉDÉ POUR LA PRÉPARATION DE FROVATRIPTAN ET DE SUCCINATE DE FROVATRIPTAN ET DE LEURS PRODUITS INTERMÉDIAIRES DE SYNTHÈSE
申请人:GENERICS UK LTD
公开号:WO2010122343A1
公开(公告)日:2010-10-28
The present invention relates to the active pharmaceutical ingredient frovatriptan and pharmaceutically acceptable salts thereof. In particular, it relates to efficient processes for the preparation of frovatriptan and its synthetic intermediates, which are amenable to large scale commercial production and provide the required products with improved yield and purity.
Discovery of 4-[3-(<i>trans</i>-3-Dimethylaminocyclobutyl)-1<i>H</i>-indol-5-ylmethyl]- (4<i>S</i>)-oxazolidin-2-one (4991W93), a 5HT<sub>1B/1D</sub> Receptor Partial Agonist and a Potent Inhibitor of Electrically Induced Plasma Extravasation
作者:Karamjit Singh Jandu、Vikki Barrett、Michael Brockwell、David Cambridge、Duncan R. Farrant、Christopher Foster、Heather Giles、Robert C. Glen、Alan P. Hill、Heather Hobbs、Andrew Honey、Graeme R. Martin、John Salmon、Donna Smith、Patrick Woollard、David L. Selwood
DOI:10.1021/jm000956k
日期:2001.3.1
pharmacophoric model of binding of 3-(2-aminoethyl)indoles to 5HT(1B/1D) receptors, we identified the 3-aminocyclobutyl group as a potential ethylamine isostere. A novel multidimensional chemometric approach was used to predict the intrinsic activity (degree of agonism) at the receptor. A qualitative model for pharmacokinetic properties was then used to guide the synthesis toward molecules likely to have
LABELING AGENT FOR ANALYZING POST-TRANSLATIONAL MODIFICATIONS OF SERINE AND THREONINE
申请人:Shinohara Yasuro
公开号:US20140024124A1
公开(公告)日:2014-01-23
A glycoprotein and/or a glycopeptide which are a test substance is heated in the presence of a pyrazolone derivative, an isoxazolone derivative, a hydantoin derivative, a rhodanine derivative, a maleimide derivative, or the like under a basic condition to cleave and label a post-translational modification group for analysis, thereby enabling analysis of a post-translational modification of a serine residue and/or a threonine residue.
skeleton bearing two nitrogen redox centers were designed by introducing amines or hydrazines to fit with the novel binding region of NQO1. Compound 24 with a (4-fluorophenyl)hydrazine substituent was identified as the most efficient substrate for NQO1 with the reduction rate and catalytic efficiency of 1972 ± 82 μmol NADPH/min/μmol NQO1 and 6.4 ± 0.4 × 106 M-1s-1, respectively. Molecular dynamics (MD) simulation