Characterization of the stoichiometry of the complex formed by Staphylococcal LukSF and human C5aR receptor in living cells
Characterization of the stoichiometry of the complex formed by Staphylococcal LukSF and human C5aR receptor in living cells
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活细胞中葡萄球菌 LukSF 和人 C5aR 受体形成的复合物的化学计量表征
DOI:
10.1101/127514
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发表时间:
2017
期刊:
影响因子:
--
通讯作者:
Haapasalo K
中科院分区:
文献类型:
--
作者:
Haapasalo K
Staphylococcus aureusPanton Valentine Leukocidin (PVL) is a pore-forming toxin comprising protein subunits LukS and LukF. Binding of LukS to human C5a receptor (hC5aR) on leukocytes induces secondary binding of LukF and assembly of lytic complexes. Previous analysis suggests that PVL consists of 4-plus-4 LukS/LukF subunits but the exact stoichiometry between LukS, LukF and hC5aR is not yet known. In this study we determine the stoichiometry and spatiotemporal dynamics of functional LukS/LukF-hC5aR complexes in living eukaryotic cells. By using rapid total internal reflection fluorescence (TIRF) and single-molecule photobleaching analysis we found that tetrameric LukS-hC5aR complexes are formed within a cluster of receptors. Upon binding to hC5aR each LukS subunit binds LukF leading to lytic pore formation and simultaneous dissociation of receptors from the complex. Our findings corroborate a hetero-octamer model but provide a new view on the kinetics of crucial virulence factor assembly on integrated host cell membrane receptors.
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影响因子:
3.1
作者:
K. Veldkamp;H. J. Heezius;Jan Verhoef;J. A. Strijp;K. V. Kessel
通讯作者:
K. V. Kessel
影响因子:
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作者:
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DOI:
10.1098/rstb.2012.0029
发表时间:
2013-02-05
影响因子:
6.3
作者:
Robson, Alex;Burrage, Kevin;Leake, Mark C.
通讯作者:
Leake, Mark C.
影响因子:
3.1
作者:
Meyer, Florent;Girardot, Raymonde;Colin, Didier A.
通讯作者:
Colin, Didier A.
DOI:
10.1073/pnas.1110402108
发表时间:
2011-10
期刊:
Proceedings of the National Academy of Sciences
影响因子:
--
作者:
K. Yamashita;Y. Kawai;Yoshikazu Tanaka;N. Hirano;J. Kaneko;N. Tomita;M. Ohta;Y. Kamio;M. Yao;I. Tanaka
通讯作者:
K. Yamashita;Y. Kawai;Yoshikazu Tanaka;N. Hirano;J. Kaneko;N. Tomita;M. Ohta;Y. Kamio;M. Yao;I. Tanaka