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N-acetylneuraminic acid

中文名称
——
中文别名
——
英文名称
N-acetylneuraminic acid
英文别名
sialic acid;N-[(2R,3R,4S)-6-carboxy-4,6-dihydroxy-2-[(1R,2R)-1,2,3-trihydroxypropyl]oxan-3-yl]ethanimidate
N-acetylneuraminic acid化学式
CAS
——
化学式
C11H18NO9
mdl
——
分子量
308.265
InChiKey
SQVRNKJHWKZAKO-LUWBGTNYSA-M
BEILSTEIN
——
EINECS
——
  • 物化性质
  • 计算性质
  • ADMET
  • 安全信息
  • SDS
  • 制备方法与用途
  • 上下游信息
  • 反应信息
  • 文献信息
  • 表征谱图
  • 同类化合物
  • 相关功能分类
  • 相关结构分类

计算性质

  • 辛醇/水分配系数(LogP):
    -2.8
  • 重原子数:
    21
  • 可旋转键数:
    4
  • 环数:
    1.0
  • sp3杂化的碳原子比例:
    0.82
  • 拓扑面积:
    180
  • 氢给体数:
    6
  • 氢受体数:
    9

反应信息

  • 作为反应物:
    描述:
    N-acetylneuraminic acidsodium hydroxide氮气 作用下, 以 为溶剂, 以to give 535 g (constant amount) of sodium N-acetylneuraminate as colorless powder的产率得到N-acetylneuraminic acid sodium salt
    参考文献:
    名称:
    Sodium N-acetylneuraminate trihydrate
    摘要:
    提供的三水合乙酰神经氨酸钠的化学式为:##STR1## 可以通过以下方法制备三水合乙酰神经氨酸钠:将其溶解在水或水和有机溶剂的混合物中,让溶液静置,沉淀和分离出三水合乙酰神经氨酸钠的晶体,然后将分离出的晶体干燥。三水合乙酰神经氨酸钠具有极低的吸湿性,因此可以以粉末形式轻松处理。
    公开号:
    US05231177A1
  • 作为产物:
    描述:
    N-[(5-acetamido-3,5-dideoxy-D-glycero-α-D-galacto-non-2-ulopyranosyl)onate]-3',4'-dihydro-2'H-pyrano[3',2'-c]pyridiniumN-甲基吗啉甲醇 作用下, 生成 (2S,4S,5R,6R)-5-Acetylamino-4-hydroxy-2-methoxy-6-((1R,2R)-1,2,3-trihydroxy-propyl)-tetrahydro-pyran-2-carboxylic acid anion 、 (4S,5R,6R)-5-Acetylamino-4-hydroxy-6-((1R,2R)-1,2,3-trihydroxy-propyl)-5,6-dihydro-4H-pyran-2-carboxylic acid anion 、 N-acetylneuraminic acid
    参考文献:
    名称:
    α-D- N-乙酰基神经氨酸吡啶鎓两性离子的水溶液甲醇分解:溶剂分解发生,且没有异头羧酸酯基团的分子内参与†
    摘要:
    报告了3,4-二氢-2H-吡喃并[3,2- c ]吡啶鎓α- D - N-乙酰基神经氨酸酯的合成(4),随后的甲醇水解速率常数和相关的反应产物。当与类似的2-脱氧葡萄糖吡喃糖基4'-溴异喹啉鎓盐(11)相比时,溶剂分解速率4显示出对溶剂的电离能力的降低的敏感性。溶剂分解产物分析表明,取代主要发生于构型的反转。因此可以得出结论,4的甲醇分解反应通过解离过渡态进行,没有异头羧酸酯基团的分子内亲核参与。版权所有©2004 John Wiley&Sons,Ltd.
    DOI:
    10.1002/poc.776
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文献信息

  • MEDICINAL CARBOHYDRATES FOR TREATMENT OF RESPIRATORY CONDITIONS
    申请人:Jin Betty
    公开号:US20120142619A1
    公开(公告)日:2012-06-07
    The present invention relates to a method and compounds of Formula (1) and/or (2) or their pharmaceutically acceptable inorganic or organic salt thereof, and their compositions for treating respiratory conditions including post viral/bacterial infections, acute/chronic bronchitis, COPD, cystic fibrosis, and inflammatory conditions. It has been found by the applicants that the compounds of Formula (1) and/or (2) or their pharmaceutically acceptable inorganic or organic salt thereof could speed up the recovery of the viability of damaged respiratory tract cells by restoring sialylglyco-conjugates on their surface.
    本发明涉及一种方法和式(1)和/或(2)化合物,以及它们的药学上可接受的无机或有机盐和它们的组合物,用于治疗呼吸道疾病,包括病毒/细菌感染后的状况、急性/慢性支气管炎、慢性阻塞性肺疾病、囊性纤维化和炎症性疾病。申请人发现,式(1)和/或(2)化合物或它们的药学上可接受的无机或有机盐可以通过恢复呼吸道细胞表面的唾液酸糖结合物来加速受损呼吸道细胞的生存能力恢复。
  • Medicinal carbohydrates for treatment of respiratory conditions
    申请人:Jin Betty
    公开号:US09040503B2
    公开(公告)日:2015-05-26
    A method of promoting recovery of cell viability of a damaged respiratory cell. The method includes a step of administering to the cell at least one pharmaceutically acceptable compound, which accelerates sialyglycoconjugate biosynthesis to restore sialylglycoconjugates on the surface of the respiratory cell. Also disclosed are a method and a pharmaceutical composition, both for treating a respiratory condition.
    一种促进受损呼吸细胞细胞活力恢复的方法。该方法包括向细胞施加至少一种药物可接受的化合物的步骤,该化合物加速唾液酸糖蛋白合成,以恢复呼吸细胞表面上的唾液酸糖蛋白。还公开了一种治疗呼吸疾病的方法和制药组合物。
  • Structural and Mechanistic Analysis of Sialic Acid Synthase NeuB from Neisseria meningitidis in Complex with Mn2+, Phosphoenolpyruvate, and N-Acetylmannosaminitol
    作者:Jason Gunawan、Dave Simard、Michel Gilbert、Andrew L. Lovering、Warren W. Wakarchuk、Martin E. Tanner、Natalie C.J. Strynadka
    DOI:10.1074/jbc.m411942200
    日期:2005.2
    cavity at the C-terminal end of the barrel; however, the positioning of the swapped antifreeze-like domain from the adjacent monomer provides key residues for hydrogen bonding with substrates in the active site of NeuB, a structural feature that leads to distinct modes of substrate binding from other PEP-utilizing enzymes that lack an analogous antifreeze-like domain. Our observation of a direct interaction
    在脑膜炎奈瑟氏球菌和相关细菌病原体中,唾液酸在逃避哺乳动物细胞的免疫中起关键作用,并通过包括唾液酸合酶(NeuB,SiaC或SynC)的保守酶途径合成。NeuB催化磷酸烯醇丙酮酸(PEP)和N-乙酰甘露糖胺的缩合,直接形成N-乙酰神经氨酸(或唾液酸)。在本文中,我们报告了监测NeuB反应动力学的偶联测定法的发展和一项18O标记研究,该研究证明了合酶通过CO键裂解机制起作用。我们还报告了唾液酸合酶的第一结构,即NeuB的结构,揭示了一个独特的域交换同型二聚体结构,该结构由N端的(beta / alpha)8桶(TIM桶)型折叠和一个与冰结合III型抗冻蛋白具有高度序列同一性和结构相似性的域组成酶的C末端。我们已经确定了苹果酸结合形式的NeuB的结构,并结合了PEP和底物类似物N-乙酰甘露糖醇至1.9和2.2 A的分辨率。NeuB的典型活性蛋白是其他TIM桶蛋白的典型代表,位于桶C末端的空腔中
  • Purification and Characterization of<i>N</i>-Acetylneuraminate Synthase from<i>Escherichia coli</i>K1-M12
    作者:Eriko Komaki、Yasuhiro Ohta、Yoji Tsukada
    DOI:10.1271/bbb.61.2046
    日期:1997.1
    N-Acetylneuraminate (NeuAc) synthase, which catalyzes NeuAc synthesis by condensation of N-acetyl-d-mannosamine (ManNAc) and phosphoenolpyruvate (PEP), was purified from a cell extract of Escherichia coli KI-M12 to electrophoretically homogeneity by serial column chromatographies. The molecular weight of native enzyme was estimated to be 106,000 by gel filtration. After denaturation in sodium dodecyl sulfate, the molecular weight was reduced to 52,000, indicating the existence of 2 identical subunits. The optimum pH was 7.5 and the stable pH range was 7.0 to 10.0. The enzyme was thermostable up to 30°C. No metal ion was required for the enzyme activity. SH-inhibitors such as p-chloromercuribenzoic acid and mercury chloride were potent inhibitors. The Km for ManNAc and PEP were 5.6 mm and 0.04 mm, respectively.
    N-乙酰神经氨酸(NeuAc)合成酶通过N-乙酰-D-甘露糖胺(ManNAc)和磷酸烯醇丙酮酸(PEP)的缩合催化NeuAc的合成,从大肠杆菌KI-M12的细胞提取物中纯化,并通过连续柱色谱法电泳纯化。通过凝胶过滤法估计天然酶的分子量为106,000。在十二烷基硫酸钠中变性后,分子量减少到52,000,表明存在2个相同的亚基。最佳pH值为7.5,稳定pH范围为7.0至10.0。该酶在30°C下具有热稳定性。酶活性不需要金属离子。SH抑制剂如对氯汞苯甲酸和氯化汞是有效的抑制剂。ManNAc和PEP的Km分别为5.6 mm和0.04 mm。
  • 9-O-Acetylation of sialic acids is catalysed by CASD1 via a covalent acetyl-enzyme intermediate
    作者:Anna-Maria T. Baumann、Mark J. G. Bakkers、Falk F. R. Buettner、Maike Hartmann、Melanie Grove、Martijn A. Langereis、Raoul J. de Groot、Martina Mühlenhoff
    DOI:10.1038/ncomms8673
    日期:——
    Abstract

    Sialic acids, terminal sugars of glycoproteins and glycolipids, play important roles in development, cellular recognition processes and host–pathogen interactions. A common modification of sialic acids is 9-O-acetylation, which has been implicated in sialoglycan recognition, ganglioside biology, and the survival and drug resistance of acute lymphoblastic leukaemia cells. Despite many functional implications, the molecular basis of 9-O-acetylation has remained elusive thus far. Following cellular approaches, including selective gene knockout by CRISPR/Cas genome editing, we here show that CASD1—a previously identified human candidate gene—is essential for sialic acid 9-O-acetylation. In vitro assays with the purified N-terminal luminal domain of CASD1 demonstrate transfer of acetyl groups from acetyl-coenzyme A to CMP-activated sialic acid and formation of a covalent acetyl-enzyme intermediate. Our study provides direct evidence that CASD1 is a sialate O-acetyltransferase and serves as key enzyme in the biosynthesis of 9-O-acetylated sialoglycans.

    摘要

    唾液酸是糖蛋白和糖脂的末端糖,对于发育、细胞识别过程和宿主-病原体相互作用起着重要作用。唾液酸的常见修饰是9-O-乙酰化,已被证明在唾液糖基的识别、神经节苷脂生物学以及急性淋巴细胞白血病细胞的存活和抗药性中起着重要作用。尽管有许多功能意义,但9-O-乙酰化的分子基础迄今仍然不清楚。通过细胞方法,包括CRISPR/Cas基因组编辑的选择性基因敲除,我们在这里展示了之前鉴定的人类候选基因CASD1对唾液酸9-O-乙酰化是必不可少的。通过对CASD1纯化的N端腔内结构域的in vitro测定,我们证明了乙酰辅酶A向CMP激活的唾液酸转移乙酰基的形成,以及形成共价的乙酰-酶中间体。我们的研究提供了直接证据,证明CASD1是一种唾液酸O-乙酰转移酶,是合成9-O-乙酰化唾液糖基的关键酶。

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