Structure of Anabaena flos-aquae gas vesicles revealed by cryo-ET.
Structure of Anabaena flos-aquae gas vesicles revealed by cryo-ET.
复制标题
DOI:
10.1016/j.str.2023.03.011
复制
发表时间:
2023-05-04
期刊:
影响因子:
5.7
通讯作者:
Jensen, Grant J.
中科院分区:
文献类型:
--
作者:
Dutka, Przemysaw;Metskas, Lauren Ann;Hurt, Robert C.;Salahshoor, Hossein;Wang, Ting-Yu;Malounda, Dina;Lu, George J.;Chou, Tsui-Fen;Shapiro, Mikhail G.;Jensen, Grant J.
Dutka et al. used cryo-ET supported by biochemical data and computational modeling to reveal the conserved structure of Anabaena flos-aquae gas vesicles. The resulting model gives insights into the distinctive mechanical properties of gas vesicles and their assembly. Gas vesicles (GVs) are gas-filled protein nanostructures employed by several species of bacteria and archaea as flotation devices to enable access to optimal light and nutrients. The unique physical properties of GVs have led to their use as genetically encodable contrast agents for ultrasound and MRI. Currently, however, the structure and assembly mechanism of GVs remain unknown. Here we employ cryoelectron tomography to reveal how the GV shell is formed by a helical filament of highly conserved GvpA subunits. This filament changes polarity at the center of the GV cylinder, a site that may act as an elongation center. Subtomogram averaging reveals a corrugated pattern of the shell arising from polymerization of GvpA into a β sheet. The accessory protein GvpC forms a helical cage around the GvpA shell, providing structural reinforcement. Together, our results help explain the remarkable mechanical properties of GVs and their ability to adopt different diameters and shapes.
登录
查看更多内容
DOI:
10.1107/s0907444909052925
发表时间:
2010-02
期刊:
Acta crystallographica. Section D, Biological crystallography
影响因子:
--
作者:
Adams PD;Afonine PV;Bunkóczi G;Chen VB;Davis IW;Echols N;Headd JJ;Hung LW;Kapral GJ;Grosse-Kunstleve RW;McCoy AJ;Moriarty NW;Oeffner R;Read RJ;Richardson DC;Richardson JS;Terwilliger TC;Zwart PH
通讯作者:
Zwart PH
影响因子:
3
作者:
He, Shaoda;Scheres, Sjors H. W.
通讯作者:
Scheres, Sjors H. W.
DOI:
10.1098/rstb.2001.1022
发表时间:
2002-02-28
影响因子:
6.3
作者:
Gosline, J;Lillie, M;Savage, K
通讯作者:
Savage, K
影响因子:
2.8
作者:
Beard, SJ;Handley, BA;Walsby, AE
通讯作者:
Walsby, AE
影响因子:
38.3
作者:
Bar-Zion, Avinoam;Nourmahnad, Atousa;Shapiro, Mikhail G.
通讯作者:
Shapiro, Mikhail G.