(S)-2-(Aminomethyl)-4-methylpentanoic acid is primarily used in the synthesis of peptides and pharmaceutical compounds. It serves as a building block in the development of drugs targeting neurological disorders, particularly those related to the central nervous system. Its structure allows it to act as a precursor for creating molecules with potential therapeutic effects, such as anticonvulsants or neuroprotective agents. Additionally, it is utilized in research to study enzyme interactions and metabolic pathways, aiding in the discovery of new treatments for various diseases. Its chiral nature makes it valuable in asymmetric synthesis, contributing to the production of enantiomerically pure compounds.