几种改进的CoMFA方法比较研究血小板活化因子拮抗剂 | |
聂晶 ; 董喜成 ; 潘家祜 | |
刊名 | 化学学报 |
2003 | |
卷号 | 61期号:7页码:1129-1135 |
ISSN号 | 0567-7351 |
其他题名 | Comparison of modified CoMFA in study of PAF antagonist |
通讯作者 | 董喜成 |
中文摘要 | 由于传统的比较分子场分析(CoMFA)方法本身存在一些缺陷,使得分子的叠合规则以及叠合分子的空间取向和空 间位置等因素对q~2的影响很大,因此相继提出了几种改进的CoMFA方法.为了优化CoMFA结果,应用传统的CoMFA方法 和交叉验证的R~2引导的区域选择法(q~2。GRS)、全取向搜索法(AOS)、全空间搜索法(APS)以及比较分子相似性指数 (CoMSIA)等四种改进的coMFA方法,对18个pinusolide类衍生物这类新发现的血小板活化因子(PAF)桔抗剂进行了比较研 究.结果表明四种改进的CoMFA方法得到的q~2值均比传统CoMFA 的高.Q~2—GRS方法得到的q~2值有所提高,但综合结果并 不理想,AOS与APS得到的q~2较为理想,而在CoMSIA中,q~2几乎不受空间取向或空间位置的影响.同时我们引入基于样本 的偏最小二乘法(SAMPLS)取代原AOS/APS程序中的传统PLS进行统计分析,明显提高了其运行速度.最后,根据q~2最高 的CoMFA模型和CoMSIA模型设计了几个预测活性更高的pinusolide类似物. |
英文摘要 | Traditional comparative molecular field analysis ( CoMFA) has some critical pmblems . It is found that, exccept for alignment rule, the change in overall orientation or placement of the same set of aligned molecules can cause great variation in q~2 Several protocols have been developed to optimize q~2 and improve the predictability of CoMFA . In the present study we used conventional CoMFA and intmduced four routines of modified CoMFA, cross- validated R~2-guided regional selection (q~2-GRS) , all-orientation search ( AOS) , all-placement search ( APS) and compalative nmlecular similarity indices arlalysis (CoMSIA), to investigate a set of 18 pinusolide and its derivatives as a kind of newly discovered platelet activating factor (PAF) antagonist . The results reveal that the q~2 values obtained by the four modified CoMFA are all better than that of conventional CoMFA . AOS/APS ones lead to the highest q~2 of O. 813 and O .615 for dataset l and 2 , respectively . CoMSIA is hardly sensitive to the overall rientation or placement as expected . We significantly improved the calculating speed of AOS/APS by using samlple-distance partial least square (SAMPLS) instead of originally used conventional PLS and suggested that the improved AOS/APS and CoMSIA conld be routinely used in the fulure CoMFA studies to guarantee the reproducibility of Ihe reponed q~2 values |
学科主题 | 生命有机化学 |
收录类别 | SCI |
语种 | 中文 |
公开日期 | 2013-08-14 |
内容类型 | 期刊论文 |
源URL | [http://202.127.28.38/handle/331003/27563] |
专题 | 上海有机化学研究所_上海有机化学研究所 |
推荐引用方式 GB/T 7714 | 聂晶,董喜成,潘家祜. 几种改进的CoMFA方法比较研究血小板活化因子拮抗剂[J]. 化学学报,2003,61(7):1129-1135. |
APA | 聂晶,董喜成,&潘家祜.(2003).几种改进的CoMFA方法比较研究血小板活化因子拮抗剂.化学学报,61(7),1129-1135. |
MLA | 聂晶,et al."几种改进的CoMFA方法比较研究血小板活化因子拮抗剂".化学学报 61.7(2003):1129-1135. |
个性服务 |
查看访问统计 |
相关权益政策 |
暂无数据 |
收藏/分享 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论