Type 9 secretion system structures reveal a new protein transport mechanism.
Type 9 secretion system structures reveal a new protein transport mechanism.
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DOI:
10.1038/s41586-018-0693-y
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发表时间:
2018-12
期刊:
影响因子:
64.8
通讯作者:
Berks BC
中科院分区:
文献类型:
--
作者:
Lauber F;Deme JC;Lea SM;Berks BC
The Type IX Secretion system (T9SS) is the protein export pathway of bacteria of the Gram-negative Fibrobacteres-Chlorobi-Bacteroidetes superphylum and is an essential pathogenicity determinant in severe periodontal disease. The central element of the T9SS is a so far uncharacterized protein-conducting translocon located in the bacterial outer membrane. Using cryo-electron microscopy we now provide structural evidence that the translocon is the T9SS protein SprA. SprA forms an unprecedentedly large (36-strand) single polypeptide transmembrane β-barrel. The barrel pore is capped on the extracellular end, but has a lateral opening to the external membrane surface. Structures of SprA bound to different T9SS components demonstrate that partner proteins control access to the lateral opening and to the periplasmic end of the pore. Our results uncover a protein transporter of distinctive architecture that operates a novel alternating access mechanism in which the two ends of the protein conducting channel are open at different times.
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作者:
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通讯作者:
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Gomis-Rüth FX
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:
64.8
作者:
Goyal, Parveen;Krasteva, Petya V.;Van Genven, Nani;Gubellini, Francesca;Van den Broeck, Imke;Troupiotis-Tsailaki, Anastassia;Jonckheere, Wim;Pehau-Arnaudet, Gerard;Pinkner, Jerome S.;Chapman, Matthew R.;Hultgren, Scott J.;Howorka, Stefan;Fronzes, Remi;Remaut, Han
通讯作者:
Remaut, Han