The Vibrio cholerae minor pilin TcpB mediates uptake of the cholera toxin phage CTXφ
The Vibrio cholerae minor pilin TcpB mediates uptake of the cholera toxin phage CTXφ
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小霍乱弧菌菌毛蛋白 TcpB 介导霍乱毒素噬菌体 CTXφ 的摄取
DOI:
--
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发表时间:
2019
影响因子:
4.8
通讯作者:
L. Craig
中科院分区:
文献类型:
--
作者:
Miguel Gutierrez;S. Kolappan;Bailey A. Burrell;L. Craig
Virulent strains of the bacterial pathogen Vibrio cholerae cause the diarrheal disease cholera by releasing cholera toxin into the small intestine. V. cholerae acquired its cholera toxin genes by lysogenic infection with the filamentous bacteriophage CTXφ. CTXφ uses its minor coat protein pIII, located in multiple copies at the phage tip, to bind to the V. cholerae toxin-coregulated pilus (TCP). However, the molecular details of this interaction and the mechanism of phage internalization are not well-understood. The TCP filament is a polymer of major pilins, TcpA, and one or more minor pilin, TcpB. TCP are retractile, with both retraction and assembly initiated by TcpB. Consistent with these roles in pilus dynamics, we hypothesized that TcpB controls both binding and internalization of CTXφ. To test this hypothesis, we determined the crystal structure of the C-terminal half of TcpB and characterized its interactions with CTXφ pIII. We show that TcpB is a homotrimer in its crystallographic form as well as in solution and is present in multiple copies at the pilus tip, which likely facilitates polyvalent binding to pIII proteins at the phage tip. We further show that recombinant forms of TcpB and pIII interact in vitro, and both TcpB and anti-TcpB antibodies block CTXφ infection of V. cholerae. Finally, we show that CTXφ uptake requires TcpB-mediated retraction. Our data support a model whereby CTXφ and TCP bind in a tip-to-tip orientation, allowing the phage to be drawn into the V. cholerae periplasm as an extension of the pilus filament.
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DOI:
10.1073/pnas.84.9.2833
发表时间:
1987-05-01
影响因子:
11.1
作者:
TAYLOR, RK;MILLER, VL;MEKALANOS, JJ
通讯作者:
MEKALANOS, JJ
DOI:
10.1016/j.str.2017.07.016
发表时间:
2017
期刊:
Structure (London, England : 1993)
影响因子:
--
作者:
Wang,Fengbin;Coureuil,Mathieu;Osinski,Tomasz;Orlova,Albina;Altindal,Tuba;Gesbert,Gaël;Nassif,Xavier;Egelman,EdwardH;Craig,Lisa
通讯作者:
Craig,Lisa
影响因子:
16
作者:
Craig, L;Taylor, RK;Tainer, JA
通讯作者:
Tainer, JA
DOI:
10.1073/pnas.88.12.5403
发表时间:
1991-06-01
影响因子:
11.1
作者:
DIRITA, VJ;PARSOT, C;MEKALANOS, JJ
通讯作者:
MEKALANOS, JJ
影响因子:
5.6
作者:
Li, Juliana;Egelman, Edward H.;Craig, Lisa
通讯作者:
Craig, Lisa