Efficient identification of inhibitors targeting the closed active site conformation of the HPRT from Trypanosoma cruzi.
Efficient identification of inhibitors targeting the closed active site conformation of the HPRT from Trypanosoma cruzi.
复制标题
有效鉴定针对克氏锥虫 HPRT 闭合活性位点构象的抑制剂。
DOI:
10.1016/s1074-5521(00)00045-4
复制
发表时间:
2000
影响因子:
--
通讯作者:
Craig,SP
中科院分区:
文献类型:
--
作者:
Freymann,DM;Wenck,MA;Engel,JC;Feng,J;Focia,PJ;Eakin,AE;Craig,SP
Background:Currently, only two drugs are recommended for treatment of infection withTrypanosoma cruzi, the etiologic agent of Chagas' disease. These compounds kill the trypomastigote forms of the parasite circulating in the bloodstream, but are relatively ineffective against the intracellular stage of the parasite life cycle. Neither drug is approved by the FDA for use in the US. The hypoxanthine phosphoribosyltransferase (HPRT) fromT. cruziis a possible new target for antiparasite chemotherapy. The crystal structure of the HPRT in a conformation approximating the transition state reveals a closed active site that provides a well-defined target for computational structure-based drug discovery.Results:A flexible ligand docking program incorporating a desolvation correction was used to screen the Available Chemicals Directory for inhibitors targeted to the closed conformation of the trypanosomal HPRT. Of 22 potential inhibitors identified, acquired and tested, 16 yieldedKi's between 0.5 and 17 μM versus the substrate phosphoribosylpyrophosphate. Surprisingly, three of eight compounds tested were effective in inhibiting the growth of parasites in infected mammalian cells.Conclusions:This structure-based docking method provided a remarkably efficient path for the identification of inhibitors targeting the closed conformation of the trypanosomal HPRT. The inhibition constants of the lead inhibitors identified are unusually favorable, and the trypanostatic activity of three of the compounds in cell culture suggests that they may provide useful starting points for drug design for the treatment of Chagas' disease.
登录
查看更多内容
DOI:
--
发表时间:
1995
期刊:
Infectious agents and disease.
影响因子:
--
作者:
Ullman,B;Carter,D
通讯作者:
Carter,D
影响因子:
1.5
作者:
CAZZULO, JJ;DECAZZULO, BMF;CANNATA, JJB
通讯作者:
CANNATA, JJB
DOI:
10.1038/nsb1096-881
发表时间:
1996
期刊:
Nature Structural Biology
影响因子:
--
作者:
M. Schumacher;D. Carter;D. Roos;B. Ullman;R. Brennan
通讯作者:
R. Brennan
DOI:
10.1021/bi981052s
发表时间:
1998
期刊:
Biochemistry.
影响因子:
--
作者:
Focia,PJ;Craig3rd,SP;Nieves-Alicea,R;Fletterick,RJ;Eakin,AE
通讯作者:
Eakin,AE
DOI:
10.1021/bi9616007
发表时间:
1997
期刊:
Biochemistry.
影响因子:
--
作者:
Xu,Y;Eads,J;Sacchettini,JC;Grubmeyer,C
通讯作者:
Grubmeyer,C