The crystal structure and localization of Trypanosoma brucei invariant surface glycoproteins suggest a more permissive VSG coat in the tsetse-transmitted metacyclic stage

The crystal structure and localization of Trypanosoma brucei invariant surface glycoproteins suggest a more permissive VSG coat in the tsetse-transmitted metacyclic stage
复制标题

布氏锥虫不变表面糖蛋白的晶体结构和定位表明,在采采蝇传播的后循环阶段存在更宽松的 VSG 外壳

DOI:
10.1101/477737
复制
发表时间:
2018
期刊:
--
影响因子:
--
通讯作者:
Casas-Sánchez A
Casas-Sánchez A
中科院分区:
--
文献类型:
--
作者:
Casas-Sánchez A

文献摘要

参考文献

被引文献

相似文献

布氏锥虫(Trypanosoma Bruceispp)在采采树的唾液腺内发育成具有哺乳动物感染性的准环类鞭毛虫。除了获得一个变异的表面糖蛋白(VSG)外壳外,我们还不知道不变的表面抗原在半环阶段的表达情况。人唾液蛋白质组学分析。布鲁氏菌感染的果蝇在本文中发现了一个新的假想的GPI锚定的表面蛋白家族,命名为亚环不变表面蛋白(MISP)。MISP由5个同源基因编码,具有约80%的蛋白质同源性。MISPN-末端的晶体结构显示了一个与其他锥虫表面蛋白相同的关键特征的三螺旋结构。然而,分子模拟和实时荧光显微镜相结合表明,MISPN-末端延伸到半环VSG外壳之上,暴露出免疫原性表位。总而言之,我们认为,就不变的GPI锚定糖蛋白的表达而言,准循环细胞表面结构似乎比血流形式更允许表达,这可以被用于开发针对非洲锥虫病的新型疫苗。
Trypanosoma bruceispp. develop into mammalian-infectious metacyclic trypomastigotes inside the tsetse salivary glands. Besides acquiring a variant surface glycoprotein (VSG) coat, nothing is known about expression of invariant surface antigens by the metacyclic stage. Proteomic analysis of saliva fromT. brucei-infected flies revealed a novel family of hypothetical GPI-anchored surface proteins herein named Metacyclic Invariant Surface Proteins (MISP). MISP are encoded by five homolog genes and share ~80% protein identity. The crystal structure of MISP N-terminus at 1.82 Å resolution revealed a triple helical bundle that shares key features with other trypanosome surface proteins. However, molecular modelling combined with live fluorescent microscopy suggest that MISP N-termini are extended above the metacyclic VSG coat, exposing immunogenic epitopes. Collectively, we suggest that the metacyclic cell surface architecture appears more permissive than bloodstream forms in terms of expression of invariant GPI-anchored glycoproteins, which could be exploited for the development of novel vaccines against African trypanosomiases.
一种新的不对称分裂有助于采采蝇中感染性锥虫的持续产生
DOI: --
发表时间: 2012
期刊: Development
影响因子: 4.6
作者:
B. Rotureau;I. Subota;Johanna Buisson;P. Bastin
通讯作者: P. Bastin
DOI: 10.1186/s13071-016-1714-z
发表时间: 2016-08-02
影响因子: 3.2
作者:
Kariithi HM;Boeren S;Murungi EK;Vlak JM;Abd-Alla AM
通讯作者: Abd-Alla AM
DOI: 10.1007/978-3-642-72840-2_2
发表时间: 1987
期刊: Nature Immunology
影响因子: 30.5
作者:
J. Boothroyd;T. Beals
通讯作者: T. Beals
嗜血杆菌隐性基因种 Cha 粘附素至少有两种在宿主细胞结合、细菌聚集和生物膜形成特性方面不同的变体
DOI: 10.1128/jb.01409-13
发表时间: 2014
影响因子: 3.2
作者:
J. Mccann;A. Sheets;S. Grass;J. S. St. Geme
通讯作者: J. S. St. Geme
DOI: 10.1016/0166-6851(93)90074-8
发表时间: 1993-10-01
影响因子: 1.5
作者:
BEECROFT, RP;RODITI, I;PEARSON, TW
通讯作者: PEARSON, TW