Licensing of Centromeric Chromatin Assembly through the Mis18α-Mis18β Heterotetramer.

ABSTRACT: Centromeres are specialized chromatin domains specified by the centromere-specific CENP-A nucleosome. The stable inheritance of vertebrate centromeres is an epigenetic process requiring deposition of new CENP-A nucleosomes by HJURP. We show HJURP is recruited to centromeres through a direct interaction between the HJURP centromere targeting domain and the Mis18α-β C-terminal coiled-coil domains. We demonstrate Mis18α and Mis18β form a heterotetramer through their C-terminal coiled-coil domains. Mis18α-β heterotetramer formation is required for Mis18BP1 binding and centromere recognition. S. pombe contains a single Mis18 isoform that forms a homotetramer, showing tetrameric Mis18 is conserved from fission yeast to humans. HJURP binding disrupts the Mis18α-β heterotetramer and removes Mis18α

SUBMITTER: Nardi IK 

PROVIDER: S-EPMC4935545 | biostudies-literature | 2016 Mar

REPOSITORIES: biostudies-literature