The present invention provides compounds of Formula I, pharmaceutically acceptable salts thereof, and pharmaceutical compositions thereof. Compounds of the present invention are useful for inhibiting fungal or parasitic growth. The compounds are useful as inhibitors of glycosylphosphatidylinositol (GPI)-anchor biosynthesis, in particular, as inhibitors of fungal Gwt1 activity. The present invention further provides methods of using the compounds described herein for treating fungal or parasitic infections. The compounds can also be used as biological probes to study the effects of inhibiting Gwt1 activity.
A reporter system reflecting the transport process that transports GPI-anchored proteins to the cell wall was constructed and compounds inhibiting this process were discovered. Further, genes conferring resistance to the above compounds were identified and methods of screening for compounds that inhibit the activity of the proteins encoded by these genes were developed. Therefore, through the novel compounds, the present invention showed that antifungal agents having a novel mechanism, i.e. inhibiting the process that transports GPI-anchored proteins to the cell wall, could be achieved.
Methods of screening for compounds that inhibit the biosynthesis of gpi in malaria parasites
申请人:Hata Katsura
公开号:US20060172404A1
公开(公告)日:2006-08-03
The present inventors succeeded in isolating GWT1 (PfGWT1), which is one of the enzymes involved in GPI biosynthesis in the malaria parasite
P. falciparum
. In addition, the inventors revealed that degenerate mutant DNAs, with a lower AT content than the DNA encoding the PfGWT1 protein, can complement the phenotype of GWT
1
-deficient yeast. Based on the findings, the present invention provides the GWT1 protein of malaria parasites and the use of the protein in methods of screening for antimalarial drugs. The present invention also provides degenerate mutant DNAs encoding proteins involved in GPI biosynthesis, and which have a lower AT content than the original DNAs. The present invention also provides methods of screening for antimalarial drugs which use the degenerate mutant DNAs.
本发明人成功分离出 GWT1(PfGWT1),它是参与疟原虫 GPI 生物合成的酶之一。
恶性疟原虫
.此外,本发明人还发现,AT 含量低于 PfGWT1 蛋白编码 DNA 的退化突变 DNA 可以补充 GWT
1
-缺陷酵母的表型。基于这些发现,本发明提供了疟原虫的 GWT1 蛋白,并将该蛋白用于抗疟药物的筛选方法中。本发明还提供了编码参与 GPI 生物合成的蛋白质的退化突变 DNA,其 AT 含量低于原始 DNA。本发明还提供了使用退化突变 DNA 筛选抗疟药物的方法。
METHODS OF SCREENING FOR COMPOUNDS THAT INHIBIT THE BIOSYNTHESIS OF GPI IN MALARIA PARASITES
申请人:Eisai R&D Management Co., Ltd.
公开号:EP1565749B1
公开(公告)日:2011-09-21
METHOD OF SCREENING FOR COMPOUNDS THAT INHIBIT THE ENZYMATIC ACTIVITY OF GWT1 GENE PRODUCT