Effects of multiple conformers per compound upon 3-D similarity search and bioassay data analysis.
Effects of multiple conformers per compound upon 3-D similarity search and bioassay data analysis.
复制标题
每个化合物的多个构象异构体对 3D 相似性搜索和生物测定数据分析的影响。
DOI:
10.1186/1758-2946-4-28
复制
发表时间:
2012-11-07
影响因子:
8.6
通讯作者:
Bryant SH
中科院分区:
文献类型:
--
作者:
Kim S;Bolton EE;Bryant SH
To improve the utility of PubChem, a public repository containing biological activities of small molecules, the PubChem3D project adds computationally-derived three-dimensional (3-D) descriptions to the small-molecule records contained in the PubChem Compound database and provides various search and analysis tools that exploit 3-D molecular similarity. Therefore, the efficient use of PubChem3D resources requires an understanding of the statistical and biological meaning of computed 3-D molecular similarity scores between molecules. The present study investigated effects of employing multiple conformers per compound upon the 3-D similarity scores between ten thousand randomly selected biologically-tested compounds (10-K set) and between non-inactive compounds in a given biological assay (156-K set). When the “best-conformer-pair” approach, in which a 3-D similarity score between two compounds is represented by the greatest similarity score among all possible conformer pairs arising from a compound pair, was employed with ten diverse conformers per compound, the average 3-D similarity scores for the 10-K set increased by 0.11, 0.09, 0.15, 0.16, 0.07, and 0.18 for STST-opt, CTST-opt, ComboTST-opt, STCT-opt, CTCT-opt, and ComboTCT-opt, respectively, relative to the corresponding averages computed using a single conformer per compound. Interestingly, the best-conformer-pair approach also increased the average 3-D similarity scores for the non-inactive–non-inactive (NN) pairs for a given assay, by comparable amounts to those for the random compound pairs, although some assays showed a pronounced increase in the per-assay NN-pair 3-D similarity scores, compared to the average increase for the random compound pairs. These results suggest that the use of ten diverse conformers per compound in PubChem bioassay data analysis using 3-D molecular similarity is not expected to increase the separation of non-inactive from random and inactive spaces “on average”, although some assays show a noticeable separation between the non-inactive and random spaces when multiple conformers are used for each compound. The present study is a critical next step to understand effects of conformational diversity of the molecules upon the 3-D molecular similarity and its application to biological activity data analysis in PubChem. The results of this study may be helpful to build search and analysis tools that exploit 3-D molecular similarity between compounds archived in PubChem and other molecular libraries in a more efficient way.
登录
查看更多内容
影响因子:
3.5
作者:
Good, AC;Hermsmeier, MA;Hindle, SA
通讯作者:
Hindle, SA
影响因子:
7.3
作者:
Hawkins, Paul C. D.;Skillman, A. Geoffrey;Nicholls, Anthony
通讯作者:
Nicholls, Anthony
影响因子:
5.6
作者:
Fox, Peter C.;Wolohan, Philippa R. N.;Clark, Robert D.
通讯作者:
Clark, Robert D.
影响因子:
8.6
作者:
Bolton, Evan E.;Kim, Sunghwan;Bryant, Stephen H.
通讯作者:
Bryant, Stephen H.
影响因子:
5.6
作者:
Bender, Andreas;Jenkins, Jeremy L.;Davies, John W.
通讯作者:
Davies, John W.