The function of ENSG00000284917 (EEF1AKMT4-ECE2, EEF1AKMT4-ECE2 readthrough) is as follows. Converts big endothelin-1 to endothelin-1. May also have methyltransferase activity (By similarity). May play a role in amyloid- beta processing (By similarity). {ECO:0000250|UniProtKB:P0DPD9, ECO:0000250|UniProtKB:P0DPE2}.