Insights into the role of C3d dimers in B cell activation and Staphylococcal immune evasion
Insights into the role of C3d dimers in B cell activation and Staphylococcal immune evasion
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深入了解 C3d 二聚体在 B 细胞激活和葡萄球菌免疫逃避中的作用
DOI:
10.1101/2020.04.22.054700
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发表时间:
2020
期刊:
影响因子:
--
通讯作者:
Wahid A
中科院分区:
文献类型:
--
作者:
Wahid A
Cleavage of C3 to C3a and C3b plays a central role in the generation of complement-mediated defences. Although the thioester-mediated surface deposition of C3b has been well-studied, fluid-phase dimers of C3 fragments remain largely unexplored. Here we present the first X-ray crystal structures of disulphide-linked human C3d dimers and show they undergo structurally-stabilising N-terminal domain swapping when in complex with theStaphylococcus aureusimmunomodulator Sbi. Through binding studies and flow cytometric analyses we uncover the physiologically-relevant roles of these dimers in crosslinking complement receptor 2 and modulating B cell activation to potentially promote anergy. This potential induction of cellular tolerance by C3d dimers could contribute to Sbi-mediatedS. aureusimmune evasion as well as limit autoreactive immune responses under physiological conditions. Thus, insights gained from our findings could inform the design of novel therapies for autoimmune disorders and enhance our understanding surrounding the importance of complement in the fluid phase.
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DOI:
--
发表时间:
1989
期刊:
Journal of immunology (Baltimore, Md. : 1950)
影响因子:
--
作者:
Carter,RH;Fearon,DT
通讯作者:
Fearon,DT
影响因子:
4.4
作者:
J. Melamed;M. Arnaout;H. Colten
通讯作者:
H. Colten
影响因子:
3.6
作者:
Kulik, Liudmila;Chen, Kuan;Holers, V. Michael
通讯作者:
Holers, V. Michael
影响因子:
7.3
作者:
van Beek AE;Pouw RB;Brouwer MC;van Mierlo G;Geissler J;Ooijevaar-de Heer P;de Boer M;van Leeuwen K;Rispens T;Wouters D;Kuijpers TW
通讯作者:
Kuijpers TW
影响因子:
1.8
作者:
S. Suradhat;R. Braun;P. J. Lewis;L. Babiuk;S. van Drunen Littel-van den Hurk-S.-van-Drunen-Littel-van-den-Hurk-1398435165;P. Griebel;M. Baca-Estrada
通讯作者:
S. Suradhat;R. Braun;P. J. Lewis;L. Babiuk;S. van Drunen Littel-van den Hurk-S.-van-Drunen-Littel-van-den-Hurk-1398435165;P. Griebel;M. Baca-Estrada