VSGLNPSLWSIFGLQFILLWLVSGSRHYLW is a 30-amino-acid peptide mimicking the C-terminal domain of α2δ-1, termed as α2δ-1Tat peptide. VSGLNPSLWSIFGLQFILLWLVSGSRHYLW can effectively interrupt the α2δ-1 - NMDAR interaction in vitro and in vivo. VSGLNPSLWSIFGLQFILLWLVSGSRHYLW can be used for researching neuropathic pain.