Required for association of the centrosomes with the poles of the bipolar mitotic spindle during metaphase. Also involved in chromosome alignment. May promote centrosome maturation probably by recruiting A-kinase anchor protein AKAP9 to centrosomes in early mitosis. Binds specifically to miRNA MIR145 hairpin, regulates MIR145 expression at a postranscriptional level (By similarity). Interacts with INCA1. Associated with the outer kinetochore. May be due to intron retention. Belongs to the class IV-like SAM-binding methyltransferase superfamily.