(3R,8R,9S,10R,13S,14S,17S)-17-methoxy-10,13-dimethyl-2,3,4,7,8,9,11,12,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthren-3-ol

• 分子结构分类: 有机化合物 - 脂质和类脂质分子 - 类固醇和类固醇衍生物
• 英文名称: (3R,8R,9S,10R,13S,14S,17S)-17-methoxy-10,13-dimethyl-2,3,4,7,8,9,11,12,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthren-3-ol
• 化学式: C₂₀H₃₂O₂
• 分子量: 304.5
• InChiKey: YQVNELYVHGIKRR-WDCLZLQXSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4.1
• 重原子数：
  22
• 可旋转键数：
  1
• 环数：
  4.0
• sp3杂化的碳原子比例：
  0.9
• 拓扑面积：
  29.5
• 氢给体数：
  1
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  (3R,8R,9S,10R,13S,14S,17S)-17-methoxy-10,13-dimethyl-2,3,4,7,8,9,11,12,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthren-3-ol 在 chromium(VI) oxide 、 4-二甲氨基吡啶 、 三乙胺 作用下， 以 二氯甲烷 为溶剂， 反应 20.0h， 生成 (3α,17β)-3-(acetyloxy)-17-methoxyandrost-5-en-7-one
  参考文献：
  名称：

  10.1111/bph.16490

  摘要：

  AbstractBackground and PurposeNeurosteroids are allosteric modulators of GABAA currents, acting through several functional binding sites although their affinity and specificity for each site are unknown. The goal of this study was to measure steady‐state binding affinities of various neurosteroids for specific sites on the GABAA receptor.Experimental ApproachTwo methods were developed to measure neurosteroid binding affinity: (1) quenching of specific tryptophan residues in neurosteroid binding sites by the neurosteroid 17‐methylketone group, and (2) FRET between MQ290 (an intrinsically fluorescent neurosteroid) and tryptophan residues in the binding sites. The assays were developed using ELIC‐α1GABAAR, a chimeric receptor containing transmembrane domains of the α1‐GABAA receptor. Tryptophan mutagenesis was used to identify specific interactions.Key ResultsAllopregnanolone (3α‐OH neurosteroid) was shown to bind at intersubunit and intrasubunit sites with equal affinity, whereas epi‐allopregnanolone (3β‐OH neurosteroid) binds at the intrasubunit site. MQ290 formed a strong FRET pair with W246, acting as a site‐specific probe for the intersubunit site. The affinity and site‐specificity of several neurosteroid agonists and inverse agonists was measured using the MQ290 binding assay. The FRET assay distinguishes between competitive and allosteric inhibition of MQ290 binding and demonstrated an allosteric interaction between the two neurosteroid binding sites.Conclusions and ImplicationsThe affinity and specificity of neurosteroid binding to two sites in the ELIC‐α1GABAAR were directly measured and an allosteric interaction between the sites was revealed. Adaptation of the MQ290 FRET assay to a plate‐reader format will enable screening for high affinity agonists and antagonists for neurosteroid binding sites.

  DOI：

  10.1111/bph.16490
• 作为产物：
  描述：

  去氢表雄酮 在 咪唑 、 sodium tetrahydroborate 、 四丁基氟化铵 、 sodium hydride 、 potassium tri-sec-butyl-borohydride 、 戴斯-马丁氧化剂 作用下， 以 四氢呋喃 、 乙醇 、 二氯甲烷 、 N,N-二甲基甲酰胺 、 mineral oil 为溶剂， 反应 56.0h， 生成 (3R,8R,9S,10R,13S,14S,17S)-17-methoxy-10,13-dimethyl-2,3,4,7,8,9,11,12,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthren-3-ol
  参考文献：
  名称：

  10.1111/bph.16490

  摘要：

  AbstractBackground and PurposeNeurosteroids are allosteric modulators of GABAA currents, acting through several functional binding sites although their affinity and specificity for each site are unknown. The goal of this study was to measure steady‐state binding affinities of various neurosteroids for specific sites on the GABAA receptor.Experimental ApproachTwo methods were developed to measure neurosteroid binding affinity: (1) quenching of specific tryptophan residues in neurosteroid binding sites by the neurosteroid 17‐methylketone group, and (2) FRET between MQ290 (an intrinsically fluorescent neurosteroid) and tryptophan residues in the binding sites. The assays were developed using ELIC‐α1GABAAR, a chimeric receptor containing transmembrane domains of the α1‐GABAA receptor. Tryptophan mutagenesis was used to identify specific interactions.Key ResultsAllopregnanolone (3α‐OH neurosteroid) was shown to bind at intersubunit and intrasubunit sites with equal affinity, whereas epi‐allopregnanolone (3β‐OH neurosteroid) binds at the intrasubunit site. MQ290 formed a strong FRET pair with W246, acting as a site‐specific probe for the intersubunit site. The affinity and site‐specificity of several neurosteroid agonists and inverse agonists was measured using the MQ290 binding assay. The FRET assay distinguishes between competitive and allosteric inhibition of MQ290 binding and demonstrated an allosteric interaction between the two neurosteroid binding sites.Conclusions and ImplicationsThe affinity and specificity of neurosteroid binding to two sites in the ELIC‐α1GABAAR were directly measured and an allosteric interaction between the sites was revealed. Adaptation of the MQ290 FRET assay to a plate‐reader format will enable screening for high affinity agonists and antagonists for neurosteroid binding sites.

  DOI：

  10.1111/bph.16490

文献信息

• NEUROACTIVE 19-ALKOXY-17-SUBSTITUTED STEROIDS, PRODRUGS THEREOF, AND METHODS OF TREATMENT USING SAME
  申请人：Sage Therapeutics, Inc.

  公开号：US20140235600A1

  公开（公告）日：2014-08-21

  The present disclosure is generally directed to neuroactive 19-alkoxy-17-substituted steroids as referenced herein, and pharmaceutically acceptable salts thereof, for use as, for example, an anesthetic, and/or in the treatment of disorders relating to GABA function and activity. The present disclosure is further directed to pharmaceutical compositions comprising such compounds.

  本公开涉及神经活性的19-烷氧基-17-取代类固醇，以及其药学上可接受的盐，例如用作麻醉剂和/或治疗与GABA功能和活性有关的疾病。本公开还涉及包含这些化合物的制药组合物。
• US9630986B2
  申请人：——

  公开号：US9630986B2

  公开（公告）日：2017-04-25
• 10.1111/bph.16490
  作者：Chintala, Satyanarayana M.、Tateiwa, Hiroki、Qian, Mingxing、Xu, Yuanjian、Amtashar, Fatima、Chen, Zi-Wei、Kirkpatrick, Charles C.、Bracamontes, John、Germann, Allison L.、Akk, Gustav、Covey, Douglas F.、Evers, Alex S.

  DOI：10.1111/bph.16490

  日期：——

  AbstractBackground and PurposeNeurosteroids are allosteric modulators of GABAA currents, acting through several functional binding sites although their affinity and specificity for each site are unknown. The goal of this study was to measure steady‐state binding affinities of various neurosteroids for specific sites on the GABAA receptor.Experimental ApproachTwo methods were developed to measure neurosteroid binding affinity: (1) quenching of specific tryptophan residues in neurosteroid binding sites by the neurosteroid 17‐methylketone group, and (2) FRET between MQ290 (an intrinsically fluorescent neurosteroid) and tryptophan residues in the binding sites. The assays were developed using ELIC‐α1GABAAR, a chimeric receptor containing transmembrane domains of the α1‐GABAA receptor. Tryptophan mutagenesis was used to identify specific interactions.Key ResultsAllopregnanolone (3α‐OH neurosteroid) was shown to bind at intersubunit and intrasubunit sites with equal affinity, whereas epi‐allopregnanolone (3β‐OH neurosteroid) binds at the intrasubunit site. MQ290 formed a strong FRET pair with W246, acting as a site‐specific probe for the intersubunit site. The affinity and site‐specificity of several neurosteroid agonists and inverse agonists was measured using the MQ290 binding assay. The FRET assay distinguishes between competitive and allosteric inhibition of MQ290 binding and demonstrated an allosteric interaction between the two neurosteroid binding sites.Conclusions and ImplicationsThe affinity and specificity of neurosteroid binding to two sites in the ELIC‐α1GABAAR were directly measured and an allosteric interaction between the sites was revealed. Adaptation of the MQ290 FRET assay to a plate‐reader format will enable screening for high affinity agonists and antagonists for neurosteroid binding sites.