A mitotic checkpoint serine/threonine-protein kinase BUB1 beta CDK1- and PLK1-phosphorylated form in human that has had Thr-620 phosphorylated by CDK1, and Ser-676 and/or Thr-680 phosphorylated by PLK1. Additionally, Thr-792 and/or Thr-1008 may be phosphorylated based on in vitro experiments. This phosphorylated form is observed during pro metaphase, spindle depolymerization (nocodazole), and lack of kinetochore tension (taxol). Example: UniProtKB:O60566, Thr-620, MOD:00047|(Ser-676, MOD:00046 and/or Thr-680, MOD:00047)|(Thr-792, MOD:00047 and/or Thr-1008, MOD:00047).
[PMID:10593653, PMID:11030144, PMID:11792804, PMID:17276342, PMID:17376779, PMID:17785528, PMID:18440313, PMID:23079597, PRO:KER]