The Plasmodium circumsporozoite protein is proteolytically processed during cell invasion.

The Plasmodium circumsporozoite protein is proteolytically processed during cell invasion.
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DOI:
10.1084/jem.20040989
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发表时间:
2005-01-03
期刊:
The Journal of experimental medicine
影响因子:
--
通讯作者:
Sinnis P
Sinnis P
中科院分区:
其他
文献类型:
--
作者:
Coppi A;Pinzon-Ortiz C;Hutter C;Sinnis P

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环孢子子蛋白(CSP)是疟疾感染期疟原虫孢子子的主要表面蛋白。虽然CSP作为一种疟疾候选疫苗已被广泛研究,但对其结构知之甚少。在这里,我们发现CSP被一种源自寄生虫的木瓜蛋白酶家族半胱氨酸蛋白酶进行蛋白水解裂解。我们的数据表明,在重复区之前发现的高度保守区I包含裂解位点。当寄生虫接触靶细胞时,孢子表面发生分裂。CSP加工抑制剂在体外抑制细胞侵袭,用E-64(一种高度特异性的半胱氨酸蛋白酶抑制剂)处理小鼠,在体内完全抑制孢子子的感染性。
The circumsporozoite protein (CSP) is the major surface protein of Plasmodium sporozoites, the infective stage of malaria. Although CSP has been extensively studied as a malaria vaccine candidate, little is known about its structure. Here, we show that CSP is proteolytically cleaved by a papain family cysteine protease of parasite origin. Our data suggest that the highly conserved region I, found just before the repeat region, contains the cleavage site. Cleavage occurs on the sporozoite surface when parasites contact target cells. Inhibitors of CSP processing inhibit cell invasion in vitro, and treatment of mice with E-64, a highly specific cysteine protease inhibitor, completely inhibits sporozoite infectivity in vivo.
DOI: 10.1084/jem.154.4.1225
发表时间: 1981-10-01
期刊: The Journal of experimental medicine
影响因子: --
作者:
Yoshida N;Potocnjak P;Nussenzweig V;Nussenzweig RS
通讯作者: Nussenzweig RS
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