Development of New Cyclic Plasmin Inhibitors with Excellent Potency and Selectivity
摘要:
The trypsin-like serine protease plasmin is a target for the development of antifibrinolytic drugs for use in cardiac surgery with cardiopulmonary bypass or organ transplantations to reduce excessive blood loss. The optimization of our recently described substrate-analogue plasmin inhibitors, which were cyclized between their P3 and P2 side chains, provided a new series with improved efficacy and excellent selectivity. The most potent inhibitor 8 binds to plasmin with an inhibition constant of 0.2 nM, whereas K-i values >1 mu M were determined for nearly all other tested trypsin-like serine proteases, with the exception of trypsin, which is also inhibited in the nanomolar range. Docking studies revealed a potential binding mode in the widely open active site of plasmin that explains the strong potency and selectivity profile of these inhibitors. The dialkylated piperazine-linker segment contributes to an excellent solubility of all analogues. Based on their overall profile the presented inhibitors are well suited for further development as injectable antifibrinolytic drugs.
derivatives (rac-1a-s) by enzymatic ammonia elimination and also in the enantiotope selective ammonia addition reactions to cinnamic acid derivatives (2a-s). The enantiotope selectivity of PzaPAL with o-, m-, p-fluoro-, o-, p-chloro- and o-, m-bromo-substituted cinnamic acids proved to be higher than that of PcPAL.
Phenylalanine Ammonia Lyase Catalyzed Synthesis of Amino Acids by an MIO-Cofactor Independent Pathway
作者:Sarah L. Lovelock、Richard C. Lloyd、Nicholas J. Turner
DOI:10.1002/anie.201311061
日期:2014.4.25
MIO‐independent reaction pathway, which proceeds in a non‐stereoselective manner and results in the generation of both L‐ and D‐phenylalanine derivatives, is described. The mechanism of the MIO‐independent pathway is explored through isotopic‐labeling studies and mutagenesis of key active‐site residues. The results obtained are consistent with amino acid deamination occurring by a stepwise E1cBelimination mechanism
苯丙氨酸解氨酶 (PAL) 属于 4-亚甲基咪唑-5-酮 (MIO) 辅因子依赖性酶家族,其负责在真核生物和原核生物中将L-苯丙氨酸转化为反式肉桂酸。在高氨浓度条件下,这种脱氨反应是可逆的,因此人们对开发 PAL 作为非天然氨基酸的对映选择性合成的生物催化剂有相当大的兴趣。在此发现了一种以前未观察到的竞争性 MIO 非依赖性反应途径,该反应途径以非立体选择性方式进行并导致L-和D的产生描述了-苯丙氨酸衍生物。通过同位素标记研究和关键活性位点残基的诱变探索了 MIO 非依赖性途径的机制。获得的结果与通过逐步 E 1 cB 消除机制发生的氨基酸脱氨基作用一致。
[EN] AZASULFURYLPEPTIDE-BASED CD36 MODULATORS AND USES THEREOF<br/>[FR] MODULATEURS CD36 À BASE D'AZASULFURYLPEPTIDES ET UTILISATIONS DE CEUX-CI
申请人:RSEM LTD PARTNERSHIP
公开号:WO2016029324A1
公开(公告)日:2016-03-03
Novel azasulfuryl-containing peptidomimetics capable of inhibiting CD36 activity are disclosed. Use of these azasulfuryl-containing peptidomimetics for the treatment of CD36-related diseases, disorders or conditions, including TLR2-mediated inflammatory disease, disorder or condition, and methods of obtaining such azasulfuryl-containing peptidomimetics, are also disclosed.
isomerization of various racemic α- and β-arylalanines catalysed by phenylalanine 2,3-aminomutase from Pantoea agglomerans (PaPAM) was investigated. Both α- and β-arylalanines were accepted as substrates when the aryl moiety was relatively small, like phenyl, 2-, 3-, 4-fluorophenyl or thiophen-2-yl. While 2-substituted α-phenylalanines bearing bulky electron withdrawing substituents did not react, the corresponding
Disclosed herein are methods, compositions, probes, assays and kits for identifying a lipid binding protein as a drug binding target. Also disclosed herein are methods, compositions, and probes for mapping a ligand binding site on a lipid binding protein, identification of lipid binding proteins, generating drug-lipid binding protein profiles, high throughput drug screening, and identification of drugs as potential lipid binding protein ligands.