4-pentynoyl-S-N-acetylcysteamine | 1431016-49-7

• 分子结构分类: 有机化合物 - 脂质和类脂质分子 - 脂肪酰基
• 英文名称: 4-pentynoyl-S-N-acetylcysteamine
• 英文别名: N-[2-(pent-4-ynoylsulfanyl)ethyl]acetamide；S-(2-acetamidoethyl) pent-4-ynethioate
• CAS: 1431016-49-7
• 化学式: C₉H₁₃NO₂S
• 分子量: 199.274
• InChiKey: XJICBYQKLBAAPU-UHFFFAOYSA-N

物化性质

• 沸点：
  379.6±27.0 °C(Predicted)
• 密度：
  1.120±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  0.8
• 重原子数：
  13.0
• 可旋转键数：
  5.0
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.56
• 拓扑面积：
  46.17
• 氢给体数：
  1.0
• 氢受体数：
  3.0

反应信息

• 作为反应物：
  描述：

  4-pentynoyl-S-N-acetylcysteamine 在 peptidoglycan O-acetyltransferase B 、 copper(II) sulfate 、 sodium ascorbate 、 三[(1-苄基-1H-1,2,3-三唑-4-基)甲基]胺 作用下， 以 水 、 叔丁醇 为溶剂， 反应 2.5h， 生成
  参考文献：
  名称：

  Postsynthetic Modification of Bacterial Peptidoglycan Using Bioorthogonal N-Acetylcysteamine Analogs and Peptidoglycan O-Acetyltransferase B

  摘要：

  Bacteria have the natural ability to install protective postsynthetic modifications onto its bacterial peptidoglycan (PG), the coat woven into bacterial cell wall. Peptidoglycan O-acetyltransferase B (PatB) catalyzes the O-acetylation of PG in Gram (-) bacteria, which aids in bacterial survival, as it prevents autolysins such as lysozyme from cleaving the PG. We explored the mechanistic derails of PatB's acetylation function and determined that PatB has substrate specificity for bioorthgonal short N-acetyl cysteamine (SNAc) donors. A variety of functionality including azides and alkynes were installed on tri-N-acetylglucosamine (NAG)3, a PG mimic, as well as PG isolated from various Gram (+) and Gram () bacterial species. The bioorthogonal modifications protect the isolated PG against lysozyme degradation in vitro. We further demonstrate that this postsynthetic Modification of PG can be extended to use click chemistry to fluorescently label the mature PG in whole bacterial cells of Bacillus subtilis. Modifying PG postsynthetically can aid in the development of antibiotics and immune modulators by expanding the understanding of how PG is processed by lytic enzymes.

  DOI：

  10.1021/jacs.7b06820
• 作为产物：
  描述：

  炔丙基脲 、 N-乙酰基半胱胺 在 盐酸-N-乙基-Nˊ-(3-二甲氨基丙基)碳二亚胺 、 三乙胺 作用下， 以 二氯甲烷 为溶剂， 反应 16.17h， 生成 4-pentynoyl-S-N-acetylcysteamine
  参考文献：
  名称：

  Investigating the reactivities of a polyketide synthase module through fluorescent click chemistry

  摘要：

  开发了一种监测体外聚酮合成的方法，通过与磺罗丹明B叠氮衍生物的铜催化叠氮-炔环加成反应（CuAAC），以简单、快速、经济且生物相容的方式，将非发色团的聚酮产物转化为亮荧光物质。

  DOI：

  10.1039/c3cc47513a

文献信息

• Repurposing the 3‐Isocyanobutanoic Acid Adenylation Enzyme SfaB for Versatile Amidation and Thioesterification
  作者：Mengyi Zhu、Lijuan Wang、Jing He

  DOI：10.1002/anie.202010042

  日期：2021.1.25

  molecules with novel skeletons, but also to identify the enzymes that catalyze diverse chemical reactions. Exploring the substrate promiscuity and catalytic mechanism of those biosynthetic enzymes facilitates the development of potential biocatalysts. SfaB is an acyl adenylate‐forming enzyme that adenylates a unique building block, 3‐isocyanobutanoic acid, in the biosynthetic pathway of the diisonitrile

  微生物天然产物的基因组挖掘使化学家不仅能够发现具有新颖骨架的生物活性分子，而且能够识别催化多种化学反应的酶。探索这些生物合成酶的底物混杂性和催化机理有助于开发潜在的生物催化剂。SFAB是一种形成酰基腺苷酸的酶，可在由硫链霉菌产生的二异腈自然产物SF2768的生物合成途径中，对独特的结构单元3-异氰基丁酸进行腺苷酸化。，并且该AMP连接酶被证明可以接受各种短链脂肪酸（SCFA）。在本文中，我们将SFAB重新用于催化那些SCFA与各种胺或硫醇亲核试剂之间的酰胺化或硫酯化反应，从而提供了另一种酶促方法来体外制备相应的酰胺和硫酯。
• Characterization of AntB, a Promiscuous Acyltransferase Involved in Antimycin Biosynthesis
  作者：Moriah Sandy、Xuejun Zhu、Zhe Rui、Wenjun Zhang

  DOI：10.1021/ol4014365

  日期：2013.7.5

  The in vivo and in vitro characterization of AntB, a dedicated acyltransferase encoded in the antimycin biosynthetic gene cluster, which catalyzes the C-8 acyloxy formation is reported. It is demonstrated that AntB has broad substrate specificity toward both the acyl substrate and the acyl carrier and produces more antimycin analogues with varying C-8 acyloxy moieties.