(2R)-2-methyltetradecanoyl-CoA(4-)

• 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: (2R)-2-methyltetradecanoyl-CoA(4-)
• 英文别名: [(2R,3S,4R,5R)-5-(6-aminopurin-9-yl)-4-hydroxy-2-[[[[(3R)-3-hydroxy-2,2-dimethyl-4-[[3-[2-[(2R)-2-methyltetradecanoyl]sulfanylethylamino]-3-oxopropyl]amino]-4-oxobutoxy]-oxidophosphoryl]oxy-oxidophosphoryl]oxymethyl]oxolan-3-yl] phosphate
• 化学式: C36H60N7O17P3S-4
• 分子量: 987.9
• InChiKey: KJEFZXSIQKASDI-MOTPQXBDSA-J

计算性质

• 辛醇/水分配系数(LogP)：
  0.8
• 重原子数：
  64
• 可旋转键数：
  31
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.78
• 拓扑面积：
  400
• 氢给体数：
  5
• 氢受体数：
  22

反应信息

• 作为产物：
  描述：

  (2S)-2-methylmyristoyl-CoA 生成 (2R)-2-methyltetradecanoyl-CoA(4-)
  参考文献：
  名称：

  α-Methylacyl-CoA Racemase from Mycobacterium tuberculosis

  摘要：

  Alpha-methylacyl-CoA racemase (Amacr) catalyzes the racemization of alpha-methyl-branched CoA esters. Sequence comparisons have shown that this enzyme is a member of the family III CoA transferases. The mammalian Amacr is involved in bile acid synthesis and branched-chain fatty acid degradation. In human, mutated variants of Amacr have been shown to be associated with disease states. Amino acid sequence alignment of Amacrs and its homologues from various species revealed 26 conserved protic residues, assumed to be potential candidates as catalytic residues. Amacr from Mycobacterium tuberculosis (MCR) was taken as a representative of the racemases. To determine their importance for efficient catalysis, each of these 26 protic residues of MCR was mutated into an alanine, respectively, and the mutated variants were overexpressed in Escherichia coli. It was found that four variants (R91A, H126A, D156A, and E241A) were properly folded but had much decreased catalytic efficiency. Apparently, Arg91, His126, Asp156, and Glu241 are important catalytic residues of MCR. The importance of these residues for catalysis can be rationalized by the 1.8 A resolution crystal structure of MCR, which shows that the catalytic site is at the interface between the large and small domain of two different subunits of the dimeric enzyme. This crystal structure is the first structure of a complete enzyme of the bile acid synthesis pathway. It shows that MCR has unique structural features, not seen in the structures of the sequence related formyl-CoA transferases, suggesting that the family III CoA transferases can be subdivided in at least two classes, being racemases and CoA transferases.

  DOI：

  10.1074/jbc.m409704200