Molecular mechanism of sequence-directed DNA loading and translocation by FtsK.

Molecular mechanism of sequence-directed DNA loading and translocation by FtsK.
复制标题

FTSK的序列指导DNA负载和易位的分子机制。

DOI:
10.1016/j.molcel.2008.05.027
复制
发表时间:
2008-08-22
期刊:
影响因子:
16
通讯作者:
Grainge, Ian
Grainge, Ian
中科院分区:
生物学1区
文献类型:
--
作者:
Lowe, Jan;Ellonen, Antti;Allen, Mark D.;Atkinson, Claire;Sherratt, David J.;Grainge, Ian

文献摘要

参考文献

被引文献

相似文献

二聚体环状染色体,由单体姐妹篇之间的重组形成,不能在细胞分裂时分离到子细胞。在大肠杆菌dif位点的XerCD位点特异性重组在需要DNA移位酶FtsK的反应中将这些二聚体转化为单体。短DNA序列KOPS(GGGNAGG),在染色体中向dif极化,指导FtsK易位。FtsK通过C-末端有翼螺旋结构域γ与KOPS相互作用。结合到8 bp KOPS DNA上的三个FtsKγ结构域的晶体结构证明了三个γ结构域如何识别KOPS。使用共价连接的FtsK二聚体,我们推断每个六聚体有三个γ结构域足以识别KOPS并加载FtsK,随后在dif激活重组。在易位过程中,FtsK不能识别反向的KOPS序列。因此,我们建议KOPS仅作为FtsK的加载位点,导致DNA上的单向定向六聚体马达。
Dimeric circular chromosomes, formed by recombination between monomer sisters, cannot be segregated to daughter cells at cell division. XerCD site-specific recombination at the Escherichia coli dif site converts these dimers to monomers in a reaction that requires the DNA translocase FtsK. Short DNA sequences, KOPS (GGGNAGGG), which are polarized toward dif in the chromosome, direct FtsK translocation. FtsK interacts with KOPS through a C-terminal winged helix domain γ. The crystal structure of three FtsKγ domains bound to 8 bp KOPS DNA demonstrates how three γ domains recognize KOPS. Using covalently linked dimers of FtsK, we infer that three γ domains per hexamer are sufficient to recognize KOPS and load FtsK and subsequently activate recombination at dif. During translocation, FtsK fails to recognize an inverted KOPS sequence. Therefore, we propose that KOPS act solely as a loading site for FtsK, resulting in a uni-directionally oriented hexameric motor upon DNA.
DOI: 10.1016/s0014-5793(00)01820-2
发表时间: 2000-07-28
期刊: FEBS LETTERS
影响因子: 3.5
作者:
Dorazi, R;Dewar, SJ
通讯作者: Dewar, SJ
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.
DOI: 10.1111/j.1365-2958.2005.05004.x
发表时间: 2006-02-01
影响因子: 3.6
作者:
Liu, NJL;Dutton, RJ;Pogliano, K
通讯作者: Pogliano, K
DOI: 10.1107/s0907444998003254
发表时间: 1998-09-01
期刊: ACTA CRYSTALLOGRAPHICA SECTION D-BIOLOGICAL CRYSTALLOGRAPHY
影响因子: --
作者:
Brunger, AT;Adams, PD;Warren, GL
通讯作者: Warren, GL
DOI: 10.1111/j.1365-2958.2004.04335.x
发表时间: 2004-11-01
影响因子: 3.6
作者:
Bigot, S;Corre, J;Barre, FX
通讯作者: Barre, FX