Structural insights into SraP-mediated Staphylococcus aureus adhesion to host cells.

Structural insights into SraP-mediated Staphylococcus aureus adhesion to host cells.
复制标题

SraP 介导的金黄色葡萄球菌对宿主细胞粘附的结构见解

DOI:
10.1371/journal.ppat.1004169
复制
发表时间:
2014-06
期刊:
影响因子:
6.7
通讯作者:
Zhou CZ
Zhou CZ
中科院分区:
医学1区
文献类型:
--
作者:
Yang YH;Jiang YL;Zhang J;Wang L;Bai XH;Zhang SJ;Ren YM;Li N;Zhang YH;Zhang Z;Gong Q;Mei Y;Xue T;Zhang JR;Chen Y;Zhou CZ

文献摘要

参考文献

被引文献

相似文献

金黄色葡萄球菌(Staphylococcus aureus)是一种革兰氏阳性菌,可引起感染性心内膜炎、骨髓炎、脓毒性关节炎和脓毒症等多种人类疾病。S.金黄色葡萄球菌SraP是一种表面暴露的富含丝氨酸的重复糖蛋白(SRRP),通过其配体结合区(BR)粘附于人血小板而在人感染性心内膜炎的发病中是必需的。目前尚不清楚SraP如何与人类宿主相互作用。在这里,我们报告的2.05纳米晶体结构的BR的SraP,揭示了一个扩展的棒状结构的四个离散模块。N-末端豆类凝集素样模块特异性结合N-乙酰神经氨酸。第二个模块采用类似于Ig结合蛋白的β-抓取折叠,而最后两个串联重复模块类似于真核生物钙粘蛋白,但钙配位模式不同。在测试的条件下,小角X射线散射和分子动力学模拟表明,三个C-末端模块作为一个相对刚性的茎延伸N-末端凝集素模块向外。除了最近鉴定的SraP的三糖配体之外,结构引导的诱变分析使我们能够阐明SraP与唾液酸化受体的结合促进S。金黄色葡萄球菌粘附和侵入宿主上皮细胞。因此,我们的研究结果提供了新的结构和功能的见解SrapP介导的宿主-病原体相互作用的S。金黄色。
Staphylococcus aureus, a Gram-positive bacterium causes a number of devastating human diseases, such as infective endocarditis, osteomyelitis, septic arthritis and sepsis. S. aureus SraP, a surface-exposed serine-rich repeat glycoprotein (SRRP), is required for the pathogenesis of human infective endocarditis via its ligand-binding region (BR) adhering to human platelets. It remains unclear how SraP interacts with human host. Here we report the 2.05 Å crystal structure of the BR of SraP, revealing an extended rod-like architecture of four discrete modules. The N-terminal legume lectin-like module specifically binds to N-acetylneuraminic acid. The second module adopts a β-grasp fold similar to Ig-binding proteins, whereas the last two tandem repetitive modules resemble eukaryotic cadherins but differ in calcium coordination pattern. Under the conditions tested, small-angle X-ray scattering and molecular dynamic simulation indicated that the three C-terminal modules function as a relatively rigid stem to extend the N-terminal lectin module outwards. Structure-guided mutagenesis analyses, in addition to a recently identified trisaccharide ligand of SraP, enabled us to elucidate that SraP binding to sialylated receptors promotes S. aureus adhesion to and invasion into host epithelial cells. Our findings have thus provided novel structural and functional insights into the SraP-mediated host-pathogen interaction of S. aureus.
DOI: 10.1021/ct700301q
发表时间: 2008-03-01
影响因子: 5.5
作者:
Hess, Berk;Kutzner, Carsten;Lindahl, Erik
通讯作者: Lindahl, Erik
DOI: 10.1016/j.tcb.2012.03.004
发表时间: 2012-06
影响因子: 19
作者:
Brasch J;Harrison OJ;Honig B;Shapiro L
通讯作者: Shapiro L
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: 10.1107/s0021889803012779
发表时间: 2003-10-01
影响因子: 6.1
作者:
Konarev, PV;Volkov, VV;Svergun, DI
通讯作者: Svergun, DI
DOI: 10.1021/ct700200b
发表时间: 2008-01-01
影响因子: 5.5
作者:
Hess, Berk
通讯作者: Hess, Berk