Zinc-finger BED domains drive the formation of the active Hermes transpososome by asymmetric DNA binding.
Zinc-finger BED domains drive the formation of the active Hermes transpososome by asymmetric DNA binding.
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DOI:
10.1038/s41467-023-40210-3
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发表时间:
2023-07-25
影响因子:
16.6
通讯作者:
Dyda, Fred
中科院分区:
文献类型:
--
作者:
Lannes, Laurie;Furman, Christopher M. M.;Hickman, Alison B. B.;Dyda, Fred
The Hermes DNA transposon is a member of the eukaryotic hAT superfamily, and its transposase forms a ring-shaped tetramer of dimers. Our investigation, combining biochemical, crystallography and cryo-electron microscopy, and in-cell assays, shows that the full-length Hermes octamer extensively interacts with its transposon left-end through multiple BED domains of three Hermes protomers contributed by three dimers explaining the role of the unusual higher-order assembly. By contrast, the right-end is bound to no BED domains at all. Thus, this work supports a model in which Hermes multimerizes to gather enough BED domains to find its left-end among the abundant genomic DNA, facilitating the subsequent interaction with the right-end. Hermes is a member of the eukaryotic hAT DNA transposon superfamily. Its transposase forms a ring-shaped tetramer of dimers to provide sufficient number of DNA binding BED domains to locate its transposon left-end in genomic DNA and facilitate the subsequent interaction with the right-end.
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