XerD unloads bacterial SMC complexes at the replication terminus.

XerD unloads bacterial SMC complexes at the replication terminus.
复制标题

DOI:
10.1016/j.molcel.2020.12.027
复制
发表时间:
2021-02-18
期刊:
影响因子:
16
通讯作者:
Wang X
Wang X
中科院分区:
生物学1区
文献类型:
--
作者:
Karaboja X;Ren Z;Brandão HB;Paul P;Rudner DZ;Wang X

文献摘要

参考文献

被引文献

相似文献

枯草芽孢杆菌染色体结构维持 (SMC) 复合物通过分区蛋白 ParB 在拓扑上加载到邻近复制起点的着丝粒位点。然后,这些环形 ATP 酶沿着左右染色体臂向下移位,同时将它们束缚在一起。在这里,我们表明,当 SMC 系链到达末端时,需要位点特异性重组酶 XerD 来解析染色体二聚体,以卸载它们。我们鉴定了末端区域中的 XerD 特异性结合位点,并表明它们以依赖于 XerD 而不是其催化残基、其伴侣蛋白 XerC 或重组位点 diff 的方式决定卸载位点。最后,我们提供了 ParB 和 XerD 同源物在金黄色葡萄球菌中发挥相似功能的证据。因此,作用于起点和终点的两个广泛保守的因子在加载和卸载在它们之间移动的 SMC 复合物方面具有第二个功能。 SMC 凝缩蛋白复合物由分配蛋白 ParB 加载在复制起点。卡拉博贾等人。表明凝缩蛋白在到达终点时被重组酶 XerD 卸载。因此,作用于起点和终点的广泛保守因子加载和卸载在起点和终点之间移动的 SMC 复合物。
Bacillus subtilis structural maintenance of chromosomes (SMC) complexes are topologically loaded at centromeric sites adjacent to the replication origin by the partitioning protein ParB. These ring-shaped ATPases then translocate down the left and right chromosome arms while tethering them together. Here, we show that the site-specific recombinase XerD, which resolves chromosome dimers, is required to unload SMC tethers when they reach the terminus. We identify XerD-specific binding sites in the terminus region and show that they dictate the site of unloading in a manner that depends on XerD but not its catalytic residue, its partner protein XerC, or the recombination site dif. Finally, we provide evidence that ParB and XerD homologs perform similar functions in Staphylococcus aureus. Thus, two broadly conserved factors that act at the origin and terminus have second functions in loading and unloading SMC complexes that travel between them. SMC condensin complexes are loaded at replication origins by the partitioning protein ParB. Karaboja et al. show that condensins are unloaded when they reach the terminus by the recombinase XerD. Thus, broadly conserved factors that act at the origin and terminus load and unload SMC complexes that travel between them.
DOI: 10.1126/science.aar7831
发表时间: 2018-04-06
期刊: Science (New York, N.Y.)
影响因子: --
作者:
Ganji M;Shaltiel IA;Bisht S;Kim E;Kalichava A;Haering CH;Dekker C
通讯作者: Dekker C
DOI: 10.1111/j.1365-2958.2008.06467.x
发表时间: 2008-11
影响因子: 3.6
作者:
Griffith KL;Grossman AD
通讯作者: Grossman AD
DOI: 10.1146/annurev-cellbio-100814-125211
发表时间: 2015
影响因子: 11.3
作者:
Badrinarayanan A;Le TB;Laub MT
通讯作者: Laub MT
DOI: 10.1038/s41586-020-2649-2
发表时间: 2020-09
期刊: Nature
影响因子: 64.8
作者:
Harris CR;Millman KJ;van der Walt SJ;Gommers R;Virtanen P;Cournapeau D;Wieser E;Taylor J;Berg S;Smith NJ;Kern R;Picus M;Hoyer S;van Kerkwijk MH;Brett M;Haldane A;Del Río JF;Wiebe M;Peterson P;Gérard-Marchant P;Sheppard K;Reddy T;Weckesser W;Abbasi H;Gohlke C;Oliphant TE
通讯作者: Oliphant TE
DOI: 10.1038/sj.emboj.7601849
发表时间: 2007-10-03
期刊: EMBO JOURNAL
影响因子: 11.4
作者:
Grainge, Ian;Bregu, Migena;Sherratt, David J.
通讯作者: Sherratt, David J.