Structural basis of meiotic chromosome synapsis through SYCP1 self-assembly.
Structural basis of meiotic chromosome synapsis through SYCP1 self-assembly.
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DOI:
10.1038/s41594-018-0078-9
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发表时间:
2018-07
影响因子:
16.8
通讯作者:
Davies OR
中科院分区:
文献类型:
--
作者:
Dunce JM;Dunne OM;Ratcliff M;Millán C;Madgwick S;Usón I;Davies OR
Meiotic chromosomes adopt unique structures in which linear arrays of chromatin loops are bound together in homologous chromosome pairs by a supramolecular protein assembly, the synaptonemal complex. This three-dimensional scaffold provides the essential structural framework for genetic exchange by crossing over and subsequent homologue segregation. The core architecture of the synaptonemal complex is provided by SYCP1. Here, we report the structure and self-assembly mechanism of human SYCP1 through X-ray crystallographic and biophysical studies. SYCP1 has an obligate tetrameric structure in which an N-terminal four-helical bundle bifurcates into two elongated C-terminal dimeric coiled-coils. This building-block assembles into a zipper-like lattice through two self-assembly sites. N-terminal sites undergo cooperative head-to-head assembly in the midline, whilst C-terminal sites interact back-to-back on the chromosome axis. Our work reveals the underlying molecular structure of the synaptonemal complex in which SYCP1 self-assembly generates a supramolecular lattice that mediates meiotic chromosome synapsis.
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DOI:
10.1107/s090744491003982x
发表时间:
2011-04
期刊:
Acta crystallographica. Section D, Biological crystallography
影响因子:
--
作者:
Evans PR
通讯作者:
Evans PR
影响因子:
5.8
作者:
Davies OR;Maman JD;Pellegrini L
通讯作者:
Pellegrini L
影响因子:
6.1
作者:
Konarev, PV;Volkov, VV;Svergun, DI
通讯作者:
Svergun, DI
DOI:
10.1107/s0907444903006516
发表时间:
2003-05-01
影响因子:
2.2
作者:
Diederichs, K;McSweeney, S;Ravelli, RBG
通讯作者:
Ravelli, RBG
影响因子:
6.1
作者:
Kozin, MB;Svergun, DI
通讯作者:
Svergun, DI