Aminopeptidase which catalyzes the hydrolysis of amino acid residues from the N-terminus of peptide or protein substrates. Binds 1 zinc ion per subunit. The disease is caused by variants affecting the gene represented in this entry. Belongs to the peptidase M1 family. A paper describing the function, enzyme activity and expression patterns of this protein has been retracted due to concerns of image manipulation. Truncated N-terminus. Truncated N-terminus.