Serine/threonine-protein kinase that phosphorylates histone H3 at 'Thr-3' (H3T3ph during mitosis. May act through H3T3ph to both position and modulate activation of AURKB and other components of the chromosomal passenger complex (CPC at centromeres to ensure proper chromatid cohesion, metaphase alignment and normal progression through the cell cycle.,GSG2,HASPIN