The novel interaction mode among centromere sub-complex CENP-O/P/U/Q/R.

Beibei Cao, Congcong Zhao, Yu Zhang, Xiaoyu Wang, Jingjing Ye, Liqiao Hu, Xiaojing He

Journal of molecular recognition : JMR 2021 Aug

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The kinetochore is essential for the accurate segregation of sister chromosome in the eukaryote cell. Among the kinetochore subunits, five proteins CENP-O/P/U/Q/R form a stable complex, referred to as CENP-O class, and are required for proper kinetochore function. Although the function and structure of yeast COMA complex (CENP-O/P/U/Q homologs) have been revealed extensively, the assembly mechanism and detail interactions among human CENP-O class are significantly different and remain largely unclear. Here, we identified the fragment (residues 241-360) of CENP-U and the C-terminal half of CENP-Q are essential to form a hetero-complex and interact with CENP-O/P sub-complex in vitro. We for the first time showed that CENP-R does not directly interact with CENP-O/P in vitro, but indeed interact with CENP-U and CENP-Q. Furthermore, both the N- and C-terminus of CENP-R are required for the interaction with CENP-U and CENP-Q. Our research pinpointed a novel interaction pattern that might shed light on the assembly mechanism of vertebrate CENP-O class. © 2021 John Wiley & Sons Ltd.

Citation

Beibei Cao, Congcong Zhao, Yu Zhang, Xiaoyu Wang, Jingjing Ye, Liqiao Hu, Xiaojing He. The novel interaction mode among centromere sub-complex CENP-O/P/U/Q/R. Journal of molecular recognition : JMR. 2021 Aug;34(8):e2892