D-galactaro-1,5-lactone

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: D-galactaro-1,5-lactone
• 英文别名: (2S,3R,4S,5R)-3,4,5-trihydroxy-6-oxooxane-2-carboxylic acid
• 化学式: C₆H₈O₇
• 分子量: 192.125
• InChiKey: YLKFQNUGXOLRNI-KXMYSMCESA-N

计算性质

• 辛醇/水分配系数(LogP)：
  -1.8
• 重原子数：
  13
• 可旋转键数：
  1
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.67
• 拓扑面积：
  124
• 氢给体数：
  4
• 氢受体数：
  7

反应信息

• 作为反应物：
  描述：

  D-galactaro-1,5-lactone 在 A₉CEQ₇ 作用下， 生成 D-galactaro-1,4-lactone
  参考文献：
  名称：

  Galactaro δ-Lactone Isomerase: Lactone Isomerization by a Member of the Amidohydrolase Superfamily

  摘要：

  Agrobacterium tumefaciens strain C58 can utilize D-galacturonate as a sole source of carbon via a pathway in which the first step is oxidation of D-galacturonate to D-galactaro-1,5-lactone. We have identified a novel enzyme, D-galactarolactone isomerase (GLI), that catalyzes the isomerizaton of D-galactaro-1,5-lactone to D-galactaro-1,4-lactone. GLI; a member of the functionally diverse amidohydrolase superfamily, is a homologue of LigI that catalyzes the hydrolysis of 2-pyrone-4,6-dicarboxylate in lignin degradation. The ability of GLI to catalyze lactone isomerization instead of hydrolysis can be explained by the absence of the general basic catalysis used by 2-pyrone-4,6-dicarbolcylate lactonase.

  DOI：

  10.1021/bi5000492
• 作为产物：
  描述：

  氨甲酸,(2-氟环丙基)-,1,1-二甲基乙基酯,顺-(9CI) 在 platinum on activated charcoal 氢氧化钾 作用下， 以 水 为溶剂， 25.0 ℃ 、101.32 kPa 条件下， 反应 3.0h， 生成 D-galactaro-1,5-lactone
  参考文献：
  名称：

  碱性溶液中还原糖的催化脱氢

  摘要：

  摘要碱性介质中的醛类在铂或铑的催化作用下被高选择性地转化为醛糖酸，并伴随着氢气的逸出。已经针对25种不同的单糖和二糖研究了脱氢反应，该反应通常可用于还原糖。研究了几个反应变量的影响，得出了一个吸附模型，在该模型中，带负电荷的O-1和H-1与催化剂表面的紧密接触均被视为推动氢化物从C-转移的动力。将1的糖加入催化剂中。

  DOI：

  10.1016/s0008-6215(00)86025-5

文献信息

• carba Nicotinamide Adenine Dinucleotide Phosphate: Robust Cofactor for Redox Biocatalysis
  作者：Ioannis Zachos、Manuel Döring、Georg Tafertshofer、Robert C. Simon、Volker Sieber

  DOI：10.1002/anie.202017027

  日期：2021.6.21

  Here we report a new robust nicotinamide dinucleotide phosphate cofactor analog (carba-NADP+) and its acceptance by many enzymes in the class of oxidoreductases. Replacing one ribose oxygen with a methylene group of the natural NADP+ was found to enhance stability dramatically. Decomposition experiments at moderate and high temperatures with the cofactors showed a drastic increase in half-life time

  在这里，我们报告了一种新的强大的烟酰胺二核苷酸磷酸辅因子类似物（carba-NADP +）及其被氧化还原酶类中的许多酶所接受。研究发现，用天然 NADP +的亚甲基取代一个核糖氧可显着增强稳定性。使用辅因子在中温和高温下进行的分解实验表明，高温下的半衰期急剧增加，因为它显着不利于吡啶鎓-N-糖苷键的水解。总体而言，成功测试了超过 27 种不同的氧化还原酶，并给出了全面的分析表征和比较。辅因子 carba-NADP +开辟了恶劣条件下氧化还原生物催化领域。
• Catalytic dehydrogenation of reducing sugars in alkaline solution
  作者：Gert de Wit、Jan J. de Vlieger、Alida C. Kock-van Dalen、Roelf Heus、Rob Laroy、Antonius J. van Hengstum、Antonius P.G. Kieboom、Herman van Bekkum

  DOI：10.1016/s0008-6215(00)86025-5

  日期：1981.5

  Abstract Aldoses in alkaline medium under the catalytic action of platinum or rhodium are converted into aldonic acids with high selectivity and with concomitant evolution of hydrogen gas. The dehydrogenation reaction has been studied for 25 different mono- and di-saccharides, and is generally applicable for reducing sugars. The influence of several reaction variables has been studied, leading to an

  摘要碱性介质中的醛类在铂或铑的催化作用下被高选择性地转化为醛糖酸，并伴随着氢气的逸出。已经针对25种不同的单糖和二糖研究了脱氢反应，该反应通常可用于还原糖。研究了几个反应变量的影响，得出了一个吸附模型，在该模型中，带负电荷的O-1和H-1与催化剂表面的紧密接触均被视为推动氢化物从C-转移的动力。将1的糖加入催化剂中。
• Galactaro δ-Lactone Isomerase: Lactone Isomerization by a Member of the Amidohydrolase Superfamily
  作者：Jason T. Bouvier、Fiona P. Groninger-Poe、Matthew Vetting、Steven C. Almo、John A. Gerlt

  DOI：10.1021/bi5000492

  日期：2014.2.4

  Agrobacterium tumefaciens strain C58 can utilize D-galacturonate as a sole source of carbon via a pathway in which the first step is oxidation of D-galacturonate to D-galactaro-1,5-lactone. We have identified a novel enzyme, D-galactarolactone isomerase (GLI), that catalyzes the isomerizaton of D-galactaro-1,5-lactone to D-galactaro-1,4-lactone. GLI; a member of the functionally diverse amidohydrolase superfamily, is a homologue of LigI that catalyzes the hydrolysis of 2-pyrone-4,6-dicarboxylate in lignin degradation. The ability of GLI to catalyze lactone isomerization instead of hydrolysis can be explained by the absence of the general basic catalysis used by 2-pyrone-4,6-dicarbolcylate lactonase.