羊毛硫肽是多环肽,其特征在于存在羊毛硫氨酸 (Lan) 和/或甲基羊毛硫氨酸 (MeLan)。它们是核糖体合成和翻译后修饰肽 (RiPP) 的成员。(Me)Lan 交联的立体化学构型对羊毛硫肽的生物活性很重要。迄今为止,已表征的羊毛硫肽中的 MeLan 残基具有 2 S ,3 S或 2 R ,3 R立体化学。在此,我们在大肠杆菌中重建了通往 SapT 的生物合成途径,SapT 是一种具有形态发生活性的 I 类羊毛硫肽。通过标准品的合成,异源产生的肽被证明具有三个 MeLan 残基和 2S ,3 R立体化学 ( d - allo - l -MeLan),首次在羊毛硫肽中观察到这种立体化学。生物合成酶的生物信息学分析表明,这种立体化学也可能存在于其他羊毛硫肽中。天蓝色链霉菌中广泛存在于放线菌中的另一个基因簇的分析证实了d - allo - l -MeLan的另一个例子,并验证了生物信息学预测。
羊毛硫肽是多环肽,其特征在于存在羊毛硫氨酸 (Lan) 和/或甲基羊毛硫氨酸 (MeLan)。它们是核糖体合成和翻译后修饰肽 (RiPP) 的成员。(Me)Lan 交联的立体化学构型对羊毛硫肽的生物活性很重要。迄今为止,已表征的羊毛硫肽中的 MeLan 残基具有 2 S ,3 S或 2 R ,3 R立体化学。在此,我们在大肠杆菌中重建了通往 SapT 的生物合成途径,SapT 是一种具有形态发生活性的 I 类羊毛硫肽。通过标准品的合成,异源产生的肽被证明具有三个 MeLan 残基和 2S ,3 R立体化学 ( d - allo - l -MeLan),首次在羊毛硫肽中观察到这种立体化学。生物合成酶的生物信息学分析表明,这种立体化学也可能存在于其他羊毛硫肽中。天蓝色链霉菌中广泛存在于放线菌中的另一个基因簇的分析证实了d - allo - l -MeLan的另一个例子,并验证了生物信息学预测。
Synthesis and Structure–Activity Relationship (SAR) of 2-Methyl-4-oxo-3-oxetanylcarbamic Acid Esters, a Class of Potent <i>N</i>-Acylethanolamine Acid Amidase (NAAA) Inhibitors
(2) and (S)-N-(2-oxo-3-oxetanyl)-biphenyl-4-carboxamide (3) inhibitNAAA, prevent FAE hydrolysis in activated inflammatory cells, and reduce tissue reactions to pro-inflammatory stimuli. Recently, our group disclosed ARN077 (4), a potent NAAAinhibitor that is active in vivo by topical administration in rodent models of hyperalgesia and allodynia. In the present study, we investigated the structure–activity
<i>N</i>-(2-Oxo-3-oxetanyl)carbamic Acid Esters as <i>N</i>-Acylethanolamine Acid Amidase Inhibitors: Synthesis and Structure–Activity and Structure–Property Relationships
known and new β-lactone derivatives, focusing on the new class of N-(2-oxo-3-oxetanyl)carbamates. Replacement of the amide group with a carbamate one led to different stereoselectivity for NAAA inhibition and higher intrinsic stability, because of the reduced level of intramolecular attack at the lactone ring. The introduction of a syn methyl at the β-position of the lactone further improved chemical
The invention provides a compound of formula I:
or a salt thereof, wherein R1, R2, R3, R4, L1, L2 and Y have any of the values described in the specification, as well as compositions comprising a compound of formula I. The compounds are useful for labeling penicillin-binding proteins (PBPs).
本发明提供了一种式 I 的化合物:
或其盐,其中 R1、R2、R3、R4、L1、L2 和 Y 具有说明书中描述的任一数值,以及包含式 I 化合物的组合物。这些化合物可用于标记青霉素结合蛋白(PBPs)。
Synthesis and Structure−Activity Relationships of <i>N</i>-(2-Oxo-3-oxetanyl)amides as <i>N</i>-Acylethanolamine-hydrolyzing Acid Amidase Inhibitors
The fatty acid ethanolamides (FAEs) are a family of bioactive lipid mediators that include the endogenous agonist of peroxisome proliferator-activated receptor-alpha, palmitoylethanolamide (PEA). FAEs are hydrolyzed intracellularly by either fatty acid amide hydrolase or N-acylethanolamine-hydrolyzing acid amidase (NAAA). Selective inhibition of NAAA by (S)-N-(2-oxo-3-oxetanyl)-3-phenylpropionamide [(S)-OOPP, 7a] prevents PEA degradation in mouse leukocytes and attenuates responses to proinflammatory stimuli. Starting from the structure of 7a, a series of beta-lactones was prepared and tested on recombinant rat NAAA to explore structure-activity relationships (SARs) for this class of inhibitors and improve their in vitro potency. Following the hypothesis that these compounds inhibit NAAA by acylation of the catalytic cysteine, we identified several requirements for recognition at the active site and obtained new potent inhibitors. In particular, (S)-N-(2-oxo-3-oxetanyl)biphenyl-4-carboxamide (7h) was more potent than 7a at inhibiting recombinant rat NAAA activity (7a, IC(50) = 420 nM; 7h, IC(50) = 115 nM) in vitro and at reducing carrageenan-induced leukocyte infiltration in vivo.
Unexpected Methyllanthionine Stereochemistry in the Morphogenetic Lanthipeptide SapT
作者:Raymond Sarksian、Julian D. Hegemann、Max A. Simon、Jeella Z. Acedo、Wilfred A. van der Donk
DOI:10.1021/jacs.2c00517
日期:2022.4.13
heterologously produced peptide was shown to possess three MeLan residues with the 2S,3R stereochemistry (d-allo-l-MeLan), the first time such stereochemistry has been observed in a lanthipeptide. Bioinformatic analysis of the biosynthetic enzymes suggests this stereochemistry may also be present in other lanthipeptides. Analysis of another gene cluster in Streptomyces coelicolor that is widespread in actinobacteria
羊毛硫肽是多环肽,其特征在于存在羊毛硫氨酸 (Lan) 和/或甲基羊毛硫氨酸 (MeLan)。它们是核糖体合成和翻译后修饰肽 (RiPP) 的成员。(Me)Lan 交联的立体化学构型对羊毛硫肽的生物活性很重要。迄今为止,已表征的羊毛硫肽中的 MeLan 残基具有 2 S ,3 S或 2 R ,3 R立体化学。在此,我们在大肠杆菌中重建了通往 SapT 的生物合成途径,SapT 是一种具有形态发生活性的 I 类羊毛硫肽。通过标准品的合成,异源产生的肽被证明具有三个 MeLan 残基和 2S ,3 R立体化学 ( d - allo - l -MeLan),首次在羊毛硫肽中观察到这种立体化学。生物合成酶的生物信息学分析表明,这种立体化学也可能存在于其他羊毛硫肽中。天蓝色链霉菌中广泛存在于放线菌中的另一个基因簇的分析证实了d - allo - l -MeLan的另一个例子,并验证了生物信息学预测。