Nipah virus fusion protein: influence of cleavage site mutations on the cleavability by cathepsin L, trypsin and furin.

Nipah virus fusion protein: influence of cleavage site mutations on the cleavability by cathepsin L, trypsin and furin.
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DOI:
10.1016/j.virusres.2009.07.020
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发表时间:
2009-11
期刊:
影响因子:
5
通讯作者:
Maisner A
Maisner A
中科院分区:
医学3区
文献类型:
--
作者:
Diederich S;Dietzel E;Maisner A

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尼帕病毒 (NiV) 是副粘病毒科的高致病性成员,起源于蝙蝠,编码融合 (F) 蛋白,该蛋白在内体内通过组织蛋白酶 L 进行蛋白水解加工。我们在此表明​​,NiV F 激活的序列要求与其他副粘病毒或正粘病毒融合蛋白明显不同。与具有一元裂解位点的其他病毒融合蛋白相比,外源胰蛋白酶对裂解肽中具有单个碱性氨基酸的 NiV F 蛋白的加工效率非常低,并且引入弗林蛋白酶共有序列不会导致这种普遍存在的蛋白酶裂解。相比之下,NiV F 蛋白中的多碱基切割肽完全损害蛋白水解加工和生物活性的产生。
Nipah virus (NiV), a highly pathogenic member of the Paramyxoviridae which originated from bats, encodes for a fusion (F) protein which is proteolytically processed within endosomes by cathepsin L. We show here that sequence requirements for NiV F activation differ markedly from other para- or orthomyxoviral fusion proteins. In contrast to other viral fusion proteins with monobasic cleavage sites, processing of NiV F proteins with one single basic amino acid in the cleavage peptide by exogenous trypsin is very inefficient, and introduction of a consensus sequence for furin does not result in cleavage by this ubiquitous protease. In contrast, a multibasic cleavage peptide in the NiV F protein completely impairs proteolytic processing and the generation of biological activity.
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发表时间: 1984-01-01
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