You can find more information about USP1 using the following links:

PFID PFID Old Formal Annotation PlasmoDB TDR Targets Subcellular Localization Affecting Drugs
Drug Name PubMed Articles (year of publication)
PF3D7_0104300 PFA0220w ubiquitin carboxyl-terminal hydrolase 1, putative PlasmoDB TDR
Chloroquine
Expasy - NiceZime View
Brenda - The Comprehensive Enzyme Information System