Enables protein methyltransferase activity. Involved in N-terminal peptidyl-alanine trimethylation and N-terminal peptidyl-proline dimethylation. Predicted to be located in cytosol and nucleoplasm. Predicted to be active in cytoplasm. Orthologous to human NTMT1 (N-terminal Xaa-Pro-Lys N-methyltransferase 1). [provided by Alliance of Genome Resources, Apr 2022]