N-tetradecanoyl homoserine lactone

• 分子结构分类: 有机化合物 - 有机酸及其衍生物 - 羧酸及其衍生物
• 英文名称: N-tetradecanoyl homoserine lactone
• 英文别名: Tetradecanoyl-L-homoserine lactone；N-[(3S)-2-oxooxolan-3-yl]tetradecanamide
• 化学式: C₁₈H₃₃NO₃
• 分子量: 311.465
• InChiKey: ZQAYHOXXVBVXPZ-INIZCTEOSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  5.9
• 重原子数：
  22
• 可旋转键数：
  13
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.89
• 拓扑面积：
  55.4
• 氢给体数：
  1
• 氢受体数：
  3

反应信息

• 作为产物：
  描述：

  高丝氨酸内酯氢溴酸盐 、 肉豆蔻酸 在 sodium hydroxide 、 盐酸-N-乙基-Nˊ-(3-二甲氨基丙基)碳二亚胺 作用下， 以 水 为溶剂， 反应 24.0h， 以98%的产率得到N-tetradecanoyl homoserine lactone
  参考文献：
  名称：

  Long-Chain Acyl-Homoserine Lactones from Methylobacterium mesophilicum: Synthesis and Absolute Configuration

  摘要：

  The acyl-homoserine lactones (acyl-HSLs) produced by Methylobacterium mesophilicum isolated from orange trees infected with the citrus variegated chlorosis (CVC) disease have been studied, revealing the occurrence of six long-chain acyl-HSLs, i.e., the saturated homologues (S)-N-dodecanoyl (1) and (S)-N-tetradecanoyl-HSL (5), the uncommon odd-chain N-tridecanoyl-HSL (3), the new natural product (S)-N-(2E)-dodecenoyl-HSL (2), and the rare unsaturated homologues (S)-N-(7Z)-tetradecenoyl (4) and (S)-N-(2E,7Z)-tetradecadienyl-HSL (6). The absolute configurations of all HSLs were determined as 3S. Compounds 2 and 6 were synthesized for the first time. Antimicrobial assays with synthetic acyl-HSLs against Gram-positive bacterial endophytes co-isolated with M. mesophilicum from CVC-infected trees revealed low or no antibacterial activity.

  DOI：

  10.1021/np900043j

文献信息

• Acyl-group specificity of AHL synthases involved in quorum-sensing in <i>Roseobacter</i> group bacteria
  作者：Lisa Ziesche、Jan Rinkel、Jeroen S Dickschat、Stefan Schulz

  DOI：10.3762/bjoc.14.112

  日期：——

  N-Acylhomoserine lactones (AHLs) are important bacterial messengers, mediating different bacterial traits by quorum sensing in a cell-density dependent manner. AHLs are also produced by many bacteria of the marine Roseobacter group, which constitutes a large group within the marine microbiome. Often, specific mixtures of AHLs differing in chain length and oxidation status are produced by bacteria, but how the biosynthetic enzymes, LuxI homologs, are selecting the correct acyl precursors is largely unknown. We have analyzed the AHL production in Dinoroseobacter shibae and three Phaeobacter inhibens strains, revealing strain-specific mixtures. Although large differences were present between the species, the fatty acid profiles, the pool for the acyl precursors for AHL biosynthesis, were very similar. To test the acyl-chain selectivity, the three enzymes LuxI₁ and LuxI₂ from D. shibae DFL-12 as well as PgaI₂ from P. inhibens DSM 17395 were heterologously expressed in E. coli and the enzymes isolated for in vitro incubation experiments. The enzymes readily accepted shortened acyl coenzyme A analogs, N-pantothenoylcysteamine thioesters of fatty acids (PCEs). Fifteen PCEs were synthesized, varying in chain length from C₄ to C₂₀, the degree of unsaturation and also including unusual acid esters, e.g., 2E,11Z-C18:2-PCE. The latter served as a precursor of the major AHL of D. shibae DFL-12 LuxI₁, 2E,11Z-C18:2-homoserine lactone (HSL). Incubation experiments revealed that PgaI₂ accepts all substrates except C₄ and C₂₀-PCE. Competition experiments demonstrated a preference of this enzyme for C₁₀ and C₁₂ PCEs. In contrast, the LuxI enzymes of D. shibae are more selective. While 2E,11Z-C18:2-PCE is preferentially accepted by LuxI₁, all other PCEs were not, except for the shorter, saturated C₁₀–C₁₄-PCEs. The AHL synthase LuxI₂ accepted only C₁₄ PCE and 3-hydroxydecanoyl-PCE. In summary, chain-length selectivity in AHLs can vary between different AHL enzymes. Both, a broad substrate acceptance and tuned specificity occur in the investigated enzymes.

  N-酰基脱氨核糖乳酸（AHLs）是重要的细菌信使，在细胞密度依赖的方式中介导不同的细菌特征。AHLs也被许多海洋玫瑰细菌组的细菌产生，这在海洋微生物组中占据着一个大的群体。通常，细菌会产生具有不同链长和氧化状态的AHLs的特定混合物，但是生物合成酶LuxI同源物如何选择正确的酰前体大部分是未知的。我们分析了Dinoroseobacter shibae和三株Phaeobacter inhibens菌株中的AHL产生，揭示了菌株特异性混合物。尽管这些物种之间存在很大差异，但脂肪酸谱，即AHL生物合成的酰前体池，非常相似。为了测试酰链选择性，从D. shibae DFL-12的三种酶LuxI1和LuxI2以及从P. inhibens DSM 17395的PgaI2在大肠杆菌中异源表达，并将酶分离用于体外孵育实验。这些酶容易接受缩短的酰辅酶A类似物，即脂肪酸的泛酸半胱氨基乙酰硫酯（PCEs）。合成了15种PCEs，链长从C4到C20不等，不饱和度不同，还包括不寻常的酸酯，例如2E,11Z-C18:2-PCE。后者作为D. shibae DFL-12 LuxI1的主要AHL的前体，2E,11Z-C18:2-脱氨核糖乳酸（HSL）。孵育实验表明，PgaI2接受除C4和C20-PCE之外的所有底物。竞争实验表明，这种酶对C10和C12 PCE有偏好。相比之下，D. shibae的LuxI酶更具选择性。虽然2E,11Z-C18:2-PCE优先被LuxI1接受，但除了较短的饱和C10-C14-PCE之外，所有其他PCE都不被接受。AHL合酶LuxI2仅接受C14 PCE和3-羟基癸酰-PCE。总之，AHL中的链长选择性在不同的AHL酶之间可能有所不同。在研究的酶中既有广泛的底物接受性，也有调节的特异性。
• Cell-free expression system for the detection of bacterial biofilms
  申请人：Freemont Paul

  公开号：US20100021942A1

  公开（公告）日：2010-01-28

  Provided is a cell-free expression system and method for its use for detecting the presence of a bacterial biofilm on a surface, wherein the film comprises a) an exogenous quorum sensing protein or an exogenous nucleic acid sequence coding for a quorum sensing protein capable of selectively binding to a bacterial signaling molecule; and b) an exogenous nucleic acid sequence comprising a promoter operably linked to a nucleic acid sequence coding for a marker protein, wherein the promoter is regulated by the binding of the quorum sensing protein to the bacterial signaling molecule. Further provided is an aerosol formulation, as well as an adhesive bandage, each of which may be used for detecting the presence of a bacterial biofilm on a surface, comprising the disclosed cell free expression system and methods therefor.

  提供了一种无细胞表达系统及其使用方法，用于检测表面上细菌生物膜的存在，其中膜包括a）外源性定量感应蛋白或编码定量感应蛋白的外源性核酸序列，其能够选择性地结合到细菌信号分子；以及b）包括可操作地连接到编码标记蛋白的核酸序列的启动子的外源性核酸序列，其中启动子由定量感应蛋白与细菌信号分子的结合调节。此外，还提供了气雾剂配方以及粘合绷带，每种都可以用于检测表面上的细菌生物膜，包括所述的无细胞表达系统及其方法。
• Apoptosis inducer and method of screening for a substance inhibiting acylated homoserine lactone
  申请人：Nomura, Nobuhiko

  公开号：EP1442742A1

  公开（公告）日：2004-08-04

  The present invention relates to an Akt inhibitor comprising a compound represented by formula I: [wherein R is C4-30 linear or branched acyl, which may be substituted.] The present invention further relates to a method of screening for a substance inhibiting acylated homoserine lactone by culturing animal cells with a test substance in the presence of acylated homoserine lactone represented by the above formula I, and then detecting inhibition of Akt activity or inhibition of the survival signalling pathway in which Akt is involved in the cells.

  本发明涉及一种 Akt 抑制剂，包括由式 I 所代表的化合物： [其中R为C4-30直链或支链酰基，可被取代。] 本发明进一步涉及一种筛选抑制酰化高丝氨酸内酯的物质的方法，该方法是在有上述式I代表的酰化高丝氨酸内酯存在的情况下，用试验物质培养动物细胞，然后检测细胞中Akt活性的抑制情况或Akt参与的生存信号通路的抑制情况。
• Methods for the treatment of an infectious bacterial disease with anti-lactone or lactone derived signal molecules antibody
  申请人：Haptogen Ltd

  公开号：EP2260868A2

  公开（公告）日：2010-12-15

  The present invention relates to methods for the control of virulence of infectious bacteria by modulating the extra-cellular concentration of bacterial cell signalling molecules. Derivatives of cell signalling molecules are conjugated to suitable carrier proteins and used to isolate high affinity receptors recognising the native signal molecule(s). By binding to signalling molecules, the receptors reduce and maintain extra-cellular concentrations of signal molecules below the threshold level that would otherwise result in certain opportunistic pathogens adopting a virulent form, and can transform virulent organisms to non-virulent states. These receptors have applications for the treatment of individuals with susceptibility to infection, the treatment of patients with existing infections, in disease monitoring and management, and in related applications where the host for infection is an animal or plant.

  本发明涉及通过调节细菌细胞信号分子的细胞外浓度来控制传染性细菌毒力的方法。细胞信号分子的衍生物与适当的载体蛋白连接，并用于分离识别原生信号分子的高亲和力受体。通过与信号分子结合，受体可将信号分子的细胞外浓度降低并维持在阈值水平以下，否则会导致某些机会性病原体采取毒性形式，并可将毒性生物转化为非毒性状态。这些受体可用于治疗易受感染者、治疗现有感染患者、疾病监测和管理，以及感染宿主为动物或植物的相关应用。
• Methods for inducing autolysis in infectious bacteria
  申请人：Haptogen Ltd

  公开号：EP2261260A2

  公开（公告）日：2010-12-15

  The present invention relates to methods for the killing of infectious bacteria by modulating the extra-cellular concentration of bacterial cell signalling molecules. This has the effect of inducing rapid cell death (autolysis) in the majority of bacterial cells, and preventing virulence or restoring a benign state in surviving cells. These receptors have applications for the treatment of individuals with susceptibility to infection, the treatment of patients with existing infections, in disease management, and in related applications where the host for infection is an animal or plant. The compositions described herein are particularly relevant to Pseudomonas aeruginosa infection, for example in the treatment of pulmonary infection in cystic fibrosis patients, and represent a unique bactericidal medication that does not directly target the bacteria.

  本发明涉及通过调节细菌细胞信号分子的细胞外浓度来杀死传染性细菌的方法。其效果是诱导大多数细菌细胞快速死亡（自溶），防止毒力增强或使存活细胞恢复良性状态。这些受体可用于治疗易受感染的个体、治疗已有感染的病人、疾病管理以及感染宿主为动物或植物的相关应用。本文所述组合物尤其适用于铜绿假单胞菌感染，例如用于治疗囊性纤维化患者的肺部感染，是一种不直接针对细菌的独特杀菌药物。