Targeting the gatekeeper residue in phosphoinositide 3-kinases
摘要:
A single residue in the ATP binding pocket of protein kinases-termed the gatekeeper-has been shown to control sensitivity to a wide range of small molecule inhibitors (Chem. Biol. 2004, 11, 691; Chem. Biol. 1999, 6, 671). Kinases that possess a small side chain at this position (Thr, Ala, or Gly) are readily targeted by structurally diverse classes of inhibitors, whereas kinases that possess a larger residue at this position are broadly resistant. Recently, lipid kinases of the phosphoinositide 3-kinase (PI3-K) family have become the focus of intense research interest as potential drug targets (Chem. Biol. 2003, 10, 207; Curr. Opin. Pharmacol. 2003, 3, 426). In this study, we identify the residue that corresponds structurally to the gatekeeper in PI3-Ks, and explore its importance in controlling enzyme activity and small molecule sensitivity. Isoleucine 848 of p110 alpha was mutated to alanine and glycine, but the mutated kinase was found to have severely impaired enzymatic activity. A structural bioinformatic comparison of this kinase with its yeast orthologs identified second site mutations that rescued the enzymatic activity of the 1848A kinase. To probe the dimensions of the gatekeeper pocket, a focused panel of analogs of the PI3-K inhibitor LY294002 was synthesized and its activity against gatekeeper mutated and wild-type p110 alpha was assessed. (c) 2005 Elsevier Ltd. All rights reserved.
作者:A. F. McKay、D. L. Garmaise、G. Y. Paris、S. Gelblum、R. J. Ranz
DOI:10.1139/v60-278
日期:1960.11.1
The preparations and properties of a number of substituted thionocarbamates are described.
描述了一系列取代硫代氨基甲酸酯的制备和性质。
Hochmolekulares organisches Material enthaltend ein Metallkomplexpigment auf Hydrazonbasis
申请人:CIBA-GEIGY AG
公开号:EP0349489A2
公开(公告)日:1990-01-03
Hochmolekulares organisches Material enthaltend mindestens einen Metallkomplex aus einem Liganden der Formel I
worin A einen carbocyclisch- oder heterocyclisch-aromatischen Rest und B einen carbocyclischen aromatischen Rest oder einen mindestens ein N-Atom enthaltenden heterocyclischen aromatischen Rest bedeuten, wobei mindestens einer der Reste A und B heterocyclisch sein muss, R₁ -C₁-C₁₈-Alkyl oder einen carbocyclischen aromatischen oder mindestens ein N-Atom enthaltenden heterocyclischen aromatischen Rest bedeutet, und das Metall ein zweifach positiv geladenes Uebergangsmetallkation Ni²⁺, Cu²⁺, Co²⁺, Zn²⁺, Mn²⁺, Fe²⁺, Cd²⁺ oder Pt²⁺ bedeutet oder für den Rest VO²⁺ steht.
一种高分子量有机材料,包含至少一种式 I 配体的金属络合物,其中 A 是碳环芳香基或杂环芳香基,B 是碳环芳香基或含至少一个 N 原子的杂环芳香基。
其中 A 是碳环芳香基或杂环芳香基,B 是碳环芳香基或杂环芳香基,至少含有一个 N 原子,A 和 B 中至少有一个必须是杂环基、R₁ 是-C₁-C₁₈-烷基或含至少一个 N 原子的碳环芳香基或杂环芳香基、金属是带双正电荷的过渡金属阳离子 Ni²⁺、Cu²⁺、Co²⁺、Zn²⁺、Mn²⁺、Fe²⁺、Cd²⁺ 或 Pt²⁺,或代表自由基 VO²⁺。
Method of catalytic crosslinking of polymers and two-pack composition used therein
申请人:ROHM AND HAAS COMPANY
公开号:EP0950669A2
公开(公告)日:1999-10-20
A method of crosslinking an oxidative polymer having oxidatively crosslinkable functional groups and a two-pack composition used therein. The oxidatively crosslinkable functional groups on the oxidative polymer are crosslinked by contacting the oxidative polymer with a catalytic amount of an oxidizing enzyme, such as horseradish peroxidase. The present invention is further directed to a two-pack coating composition which includes a polymeric component and a catalytic component, which are mixed together prior to use.