Structure and conformational dynamics of Clostridioides difficile toxin A.
Structure and conformational dynamics of Clostridioides difficile toxin A.
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DOI:
10.26508/lsa.202201383
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发表时间:
2022-06
影响因子:
4.4
通讯作者:
Jin R
中科院分区:
文献类型:
--
作者:
Chen B;Basak S;Chen P;Zhang C;Perry K;Tian S;Yu C;Dong M;Huang L;Bowen ME;Jin R
This study presents a complete structural model of TcdA holotoxin and sheds new lights into the conformational dynamics of TcdA and its roles in TcdA intoxication. Clostridioides difficile toxin A and B (TcdA and TcdB) are two major virulence factors responsible for diseases associated with C. difficile infection (CDI). Here, we report the 3.18-Å resolution crystal structure of a TcdA fragment (residues L843–T2481), which advances our understanding of the complete structure of TcdA holotoxin. Our structural analysis, together with complementary single molecule FRET and limited proteolysis studies, reveal that TcdA adopts a dynamic structure and its CROPs domain can sample a spectrum of open and closed conformations in a pH-dependent manner. Furthermore, a small globular subdomain (SGS) and the CROPs protect the pore-forming region of TcdA in the closed state at neutral pH, which could contribute to modulating the pH-dependent pore formation of TcdA. A rationally designed TcdA mutation that trapped the CROPs in the closed conformation showed drastically reduced cytotoxicity. Taken together, these studies shed new lights into the conformational dynamics of TcdA and its roles in TcdA intoxication.
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DOI:
10.1107/s0907444904019158
发表时间:
2004-12-01
影响因子:
2.2
作者:
Emsley, P;Cowtan, K
通讯作者:
Cowtan, K
DOI:
10.1073/pnas.0506391102
发表时间:
2005-12-20
影响因子:
11.1
作者:
Ho, JGS;Greco, A;Ng, KKS
通讯作者:
Ng, KKS
影响因子:
64.8
作者:
JUST, I;SELZER, J;AKTORIES, K
通讯作者:
AKTORIES, K
影响因子:
3.6
作者:
Genisyuerek, Selda;Papatheodorou, Panagiotis;Aktories, Klaus
通讯作者:
Aktories, Klaus
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