Essentiality of CENP-A Depends on Its Binding Mode to HJURP
نویسندگان
چکیده
منابع مشابه
Common Ancestry of the CENP-A Chaperones Scm3 and HJURP
The centromere is a unique chromosomal locus that ensures accurate segregation of chromosomes during cell division. The centromere supports assembly of a multiprotein complex called the kinetochore, which attaches to spindle microtubules. The kinetochore has specialized nucleosomes in which histone H3 is replaced by the centromere-specific H3 variant CENP-A/cenH3 (reviewed in Allshire and Karpe...
متن کاملPhosphorylation and DNA binding of HJURP determine its centromeric recruitment and function in CenH3(CENP-A) loading.
Centromeres, epigenetically defined by the presence of the histone H3 variant CenH3, are essential for ensuring proper chromosome segregation. In mammals, centromeric CenH3(CENP-A) deposition requires its dedicated chaperone HJURP and occurs during telophase/early G1. We find that the cell-cycle-dependent recruitment of HJURP to centromeres depends on its timely phosphorylation controlled via c...
متن کاملHow two become one: HJURP dimerization drives CENP-A assembly.
CENP-A containing nucleosomes epigenetically specify centromere position on chromosomes. Deposition of CENP-A into chromatin is mediated by HJURP, a specific CENP-A chaperone. Paradoxically, HJURP binding sterically prevents dimerization of CENP-A, which is critical to form functional centromeric nucleosomes. A recent publication in The EMBO Journal (Zasadzińska et al, 2013) demonstrates that H...
متن کاملHJURP involvement in de novo CenH3(CENP-A) and CENP-C recruitment.
Although our understanding of centromere maintenance, marked by the histone H3 variant CenH3(CENP-A) in most eukaryotes, has progressed, the mechanism underlying the de novo formation of centromeres remains unclear. We used a synthetic system to dissect how CenH3(CENP-A) contributes to the accumulation of CENP-C and CENP-T, two key components that are necessary for the formation of functional k...
متن کاملHJURP is a CENP-A chromatin assembly factor sufficient to form a functional de novo kinetochore
Centromeres of higher eukaryotes are epigenetically marked by the centromere-specific CENP-A nucleosome. New CENP-A recruitment requires the CENP-A histone chaperone HJURP. In this paper, we show that a LacI (Lac repressor) fusion of HJURP drove the stable recruitment of CENP-A to a LacO (Lac operon) array at a noncentromeric locus. Ectopically targeted CENP-A chromatin at the LacO array was su...
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ژورنال
عنوان ژورنال: Cell Reports
سال: 2020
ISSN: 2211-1247
DOI: 10.1016/j.celrep.2020.108388