You can find more information about alanine--tRNA ligase using the following links:

PFID PFID Old Formal Annotation PlasmoDB TDR Targets Subcellular Localization Affecting Drugs
Drug Name PubMed Articles (year of publication)
PF3D7_1367700 PF13_0354 alanine--tRNA ligase PlasmoDB TDR
Expasy - NiceZime View
Brenda - The Comprehensive Enzyme Information System