similar to spindle checkpoint protein-related [Arabidopsis thaliana] (TAIR:AT2G33560.1); similar to unnamed protein product [Vitis vinifera] (GB:CAO69771.1); contains InterPro domain Mitotic checkpoint serine/threonine protein kinase, Bub1 (InterPro:IPR015661); contains InterPro domain Mad3/BUB1 homology region 1 (InterPro:IPR013212)