Legionella DotM structure reveals a role in effector recruiting to the Type 4B secretion system.

Legionella DotM structure reveals a role in effector recruiting to the Type 4B secretion system.
复制标题

DOI:
10.1038/s41467-017-02578-x
复制
发表时间:
2018-02-06
影响因子:
16.6
通讯作者:
Waksman G
Waksman G
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Meir A;Chetrit D;Liu L;Roy CR;Waksman G

文献摘要

参考文献

被引文献

相似文献

嗜肺军团菌是肺炎的病原体,在感染过程中利用 4B 型分泌 (T4BS) 系统将 300 多个效应子转移到宿主细胞中。 T4BS 系统由称为 dot/icm 的大型基因簇编码,其中的三个组件 DotL、DotM 和 DotN 形成“偶联复合物”,作为效应蛋白招募的平台。一类效应子包括在其 C 末端含有富含 Glu/E-block 序列的蛋白质。然而,介导此类效应子募集的偶联复合物的蛋白质或区域尚不清楚。在这里,我们展示了 DotM 的晶体结构。这种全α螺旋结构呈现出带正电荷的残基斑块。我们表明,这些区域形成酸性富含谷氨酸肽的结合位点,并且靶向这些斑块的突变体在体内含有酸性富含谷氨酸基序的效应子的易位方面存在缺陷。我们得出结论,DotM 形成了用于招募含有酸性富含 Glu 基序的军团菌效应子的相互作用表面。嗜肺军团菌在感染过程中利用 4B 型分泌系统 (T4BSS) 将 300 多种效应蛋白易位到宿主细胞中。在这里,作者展示了 DotM 可溶结构域的晶体结构,并给出了将富含 Glu 的基序效应子招募到 T4BSS 的机制见解。
Legionella pneumophila, a causative agent of pneumonia, utilizes the Type 4B secretion (T4BS) system to translocate over 300 effectors into the host cell during infection. T4BS systems are encoded by a large gene cluster termed dot/icm, three components of which, DotL, DotM, and DotN, form the “coupling complex”, which serves as a platform for recruitment of effector proteins. One class of effectors includes proteins containing Glu-rich/E-block sequences at their C terminus. However, the protein or region of the coupling complex mediating recruitment of such effectors is unknown. Here we present the crystal structure of DotM. This all alpha-helical structure exhibits patches of positively charged residues. We show that these regions form binding sites for acidic Glu-rich peptides and that mutants targeting these patches are defective in vivo in the translocation of acidic Glu-rich motif-containing effectors. We conclude that DotM forms the interacting surface for recruitment of acidic Glu-rich motif-containing Legionella effectors. Legionella pneumophila employs the Type 4B secretion system (T4BSS) to translocate more than 300 effector proteins into the host cell during infection. Here the authors present the crystal structure of the DotM soluble domain and give mechanistic insights into the recruitment of Glu-rich motif-containing effectors to the T4BSS.
DOI: 10.1084/jem.158.6.2108
发表时间: 1983-12-01
期刊: The Journal of experimental medicine
影响因子: --
作者:
Horwitz MA
通讯作者: Horwitz MA
DOI: 10.1021/bi00176a037
发表时间: 1994-03-15
期刊: BIOCHEMISTRY
影响因子: 2.9
作者:
JONES, DT;TAYLOR, WR;THORTON, JM
通讯作者: THORTON, JM
DOI: 10.1111/mmi.12928
发表时间: 2015-04-01
影响因子: 3.6
作者:
Jeong, Kwang Cheol;Sutherland, Molly C.;Vogel, Joseph P.
通讯作者: Vogel, Joseph P.
肺炎军团菌的IV型偶联蛋白复合物的结构。
DOI: 10.1038/nmicrobiol.2017.114
发表时间: 2017-07-17
影响因子: 28.3
作者:
Kwak MJ;Kim JD;Kim H;Kim C;Bowman JW;Kim S;Joo K;Lee J;Jin KS;Kim YG;Lee NK;Jung JU;Oh BH
通讯作者: Oh BH
DOI: 10.1016/j.bbamcr.2013.12.019
发表时间: 2014-08
影响因子: 5.1
作者:
Christie, Peter J.;Whitaker, Neal;Gonzalez-Rivera, Christian
通讯作者: Gonzalez-Rivera, Christian