Aminopeptidase with broad substrate specificity for several peptides. Involved in proteolytic events essential for cell growth and viability. Plays an essential role during prophase I of meiosis. Required for correct meiotic reconbination in both male and female gametophytes. Release of an N-terminal amino acid, preferentially alanine, from a wide range of peptides, amides and arylamides. Binds 1 zinc ion per subunit. Strongly inhibited by puromycin and DAMPAQ-22. A number of isoforms are produced. According to EST sequences. Expressed in meiocytes during meiotic prophase I. Reduced fertility and shorter siliques bearing a lower number of seeds compared with wild-type plants. Cytogenetic characterization of meiosis in the mutant line reveals that both male and female meiosis are defective. Belongs to the peptidase M1 family.