SGT1-HSP90 complex is required for CENP-A deposition at centromeres.
SGT1-HSP90 complex is required for CENP-A deposition at centromeres.
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DOI:
10.1080/15384101.2017.1325039
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发表时间:
2017-09-17
期刊:
影响因子:
--
通讯作者:
Kitagawa K
中科院分区:
文献类型:
--
作者:
Niikura Y;Kitagawa R;Ogi H;Kitagawa K
The centromere plays an essential role in accurate chromosome segregation, and defects in its function lead to aneuploidy and thus cancer. The centromere-specific histone H3 variant CENP-A is proposed to be the epigenetic mark of the centromere, as active centromeres require CENP-A–containing nucleosomes to direct the recruitment of multiple kinetochore proteins. CENP-A K124 ubiquitylation, mediated by CUL4A-RBX1-COPS8 E3 ligase activity, is required for CENP-A deposition at the centromere. However, the mechanism that controls the E3 ligase activity of the CUL4A-RBX1-COPS8 complex remains obscure. We have discovered that the SGT1-HSP90 complex is required for recognition of CENP-A by COPS8. Thus, the SGT1-HSP90 complex contributes to the E3 ligase activity of the CUL4A complex that is necessary for CENP-A ubiquitylation and CENP-A deposition at the centromere.
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影响因子:
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DOI:
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发表时间:
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期刊:
Cold Spring Harbor symposia on quantitative biology
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