You can find more information about H+-pump (PPi), V-type, K+-dependent using the following links:

PFID PFID Old Formal Annotation GeneDB PlasmoDB Subcellular Localization Affecting Drugs
Drug Name PubMed Articles (year of publication)
PF3D7_1456800 PF14_0541 V-type H(+)-translocating pyrophosphatase, putative GeneDB PlasmoDB
Expasy - NiceZime View
Brenda - The Comprehensive Enzyme Information System