The augmin complex architecture reveals structural insights into microtubule branching.

The augmin complex architecture reveals structural insights into microtubule branching.
复制标题

Augmin复合体结构揭示了对微管分支的结构见解。

DOI:
10.1038/s41467-022-33228-6
复制
发表时间:
2022-09-26
影响因子:
16.6
通讯作者:
--
中科院分区:
综合性期刊1区
文献类型:
--
作者:

文献摘要

参考文献

被引文献

相似文献

在有丝分裂中,Augmin复合物与纺锤体微管结合以募集γ-微管蛋白环复合物(γ-TuRC)(主要微管成核剂),用于形成分支微管。我们对augmin介导的微管分支的理解受到augmin复合物结构信息缺乏的阻碍。在这里,我们阐明的Augmin复合物的分子结构和构象可塑性,使用整合结构生物学的方法。Augmin复合物的伸长结构的特征在于广泛的卷曲螺旋片段,并且包含两个结构元件,其在γ-TuRC和微管结合中具有不同但互补的功能,通过柔性铰链连接。Augmin复合物通过包含带正电荷的无序延伸和两个钙调蛋白同源结构域的复合微管结合位点被募集到微管。我们的研究为augmin在分支微管形成中的功能提供了结构基础,决定性地促进了我们对有丝分裂中纺锤体形成的理解。有丝分裂纺锤体中分支微管网络的形成依赖于Augmin复合物。Zupa,Würtz等人使用整合结构生物学阐明了Augmin复合物的分子结构和构象可塑性,为微管分支提供了结构见解。
In mitosis, the augmin complex binds to spindle microtubules to recruit the γ-tubulin ring complex (γ-TuRC), the principal microtubule nucleator, for the formation of branched microtubules. Our understanding of augmin-mediated microtubule branching is hampered by the lack of structural information on the augmin complex. Here, we elucidate the molecular architecture and conformational plasticity of the augmin complex using an integrative structural biology approach. The elongated structure of the augmin complex is characterised by extensive coiled-coil segments and comprises two structural elements with distinct but complementary functions in γ-TuRC and microtubule binding, linked by a flexible hinge. The augmin complex is recruited to microtubules via a composite microtubule binding site comprising a positively charged unordered extension and two calponin homology domains. Our study provides the structural basis for augmin function in branched microtubule formation, decisively fostering our understanding of spindle formation in mitosis. The formation of branched microtubule networks in mitotic spindles depends on the augmin complex. Zupa, Würtz et al. elucidate the molecular architecture and conformational plasticity of the augmin complex using integrative structural biology, providing structural insights into microtubule branching.
DOI: 10.1038/s41586-021-03819-2
发表时间: 2021-08
期刊: Nature
影响因子: 64.8
作者:
Jumper J;Evans R;Pritzel A;Green T;Figurnov M;Ronneberger O;Tunyasuvunakool K;Bates R;Žídek A;Potapenko A;Bridgland A;Meyer C;Kohl SAA;Ballard AJ;Cowie A;Romera-Paredes B;Nikolov S;Jain R;Adler J;Back T;Petersen S;Reiman D;Clancy E;Zielinski M;Steinegger M;Pacholska M;Berghammer T;Bodenstein S;Silver D;Vinyals O;Senior AW;Kavukcuoglu K;Kohli P;Hassabis D
通讯作者: Hassabis D
DOI: 10.1038/ncb3030
发表时间: 2014-09
影响因子: 21.3
作者:
通讯作者: --
DOI: 10.1074/mcp.m111.014126
发表时间: 2012-03
期刊: Molecular & cellular proteomics : MCP
影响因子: --
作者:
Leitner A;Reischl R;Walzthoeni T;Herzog F;Bohn S;Förster F;Aebersold R
通讯作者: Aebersold R
DOI: 10.1016/j.cell.2008.03.020
发表时间: 2008-05-02
期刊: CELL
影响因子: 64.5
作者:
Ciferri, Claudio;Pasqualato, Sebastiano;Musacchio, Andrea
通讯作者: Musacchio, Andrea
DOI: 10.1083/jcb.200711053
发表时间: 2008-05-05
影响因子: 7.8
作者:
Goshima, Gohta;Mayer, Mirjam;Zhang, Nan;Stuurman, Nico;Vale, Ronald D.
通讯作者: Vale, Ronald D.