CN114560915B - 一种改造的高滴度SARS-CoV-2假病毒 - Google Patents

一种改造的高滴度SARS-CoV-2假病毒 Download PDF

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CN114560915B
CN114560915B CN202111613136.6A CN202111613136A CN114560915B CN 114560915 B CN114560915 B CN 114560915B CN 202111613136 A CN202111613136 A CN 202111613136A CN 114560915 B CN114560915 B CN 114560915B
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黄维金
王佑春
李涛
聂建辉
张黎
赵晨燕
蒋霏
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National Institutes for Food and Drug Control
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Abstract

本发明涉及Spike蛋白的突变体，包含所述突变体的融合蛋白和类病毒颗粒。所述类病毒颗粒可用于抗SARS‑CoV‑2的抗体和药物的筛选(例如，检测SARS‑CoV‑2抗体的中和活性，或者在细胞水平上筛选抑制SARS‑CoV‑2感染的药物)。本发明还涉及包含上述蛋白的制备方法。本申请的假病毒的研制，使得SARS‑CoV‑2的研究不局限于高等生物安全条件的实验室。并且，所述假病毒应用广泛。例如，能够应用于抗体中和能力的检测中。

Description

一种改造的高滴度SARS-CoV-2假病毒
技术领域
本发明涉及基因工程和分子生物学领域，具体涉及Spike蛋白的突变体，包含所述突变体的融合蛋白和类病毒颗粒。所述类病毒颗粒可用于抗SARS-CoV-2的抗体和药物的筛选(例如，检测SARS-CoV-2抗体的中和活性，或者在细胞水平上筛选抑制SARS-CoV-2感染的药物)。本发明还涉及包含上述蛋白的制备方法。
背景技术
假病毒(pseudovirus)是病毒衣壳蛋白或者包膜蛋白包裹携带有报告基因的异源核酸形成的类似于真病毒的具有感染性的病毒颗粒，由于被包裹的核酸不具有复制形成病毒的全部核酸序列，所以假病毒只有一轮的感染力，操作比较安全。
假病毒主要通过质粒转染293T细胞，在细胞内表达病毒蛋白、组装形成，通过收集培养基上清或者裂解细胞等方法获得。
假病毒不仅具备和真病毒一样的感染性，进入细胞的过程和真病毒一样，而且进入细胞后不具有复制产生病毒的能力，因而没有危害，可以更安全地用于中和抗体和抗病毒药物检测。
传染性强、致病性强的病毒，如SARS-CoV-2，Ebola病毒，狂犬病毒，H7N9等，真病毒研究有极大的危险性，而且数量有限，假病毒安全性好，并可以通过转染技术大量制备，为这些危险性高的病毒研究提供了方便。
假病毒体系其特点是克服了传统方法的缺陷，使检测技术更安全、简便、快速、高通量，而且使一些本身很难培养的病毒也能采用培养的方法进行检测。
但是通常利用病毒膜蛋白直接用于假病毒的构建其病毒滴度往往较低，因此，需要进一步提高假病毒的病毒滴度。
发明内容
本申请的发明人经过大量实验和反复摸索，将Spike蛋白进行多位点突变并改造，由此获得了高滴度的SARS-CoV-2假病毒。基于此，进一步对制备假病毒过程中的载体、宿主细胞以及转染方法进行探索，获得了高滴度的假病毒，并由此完成了本发明。
因此，在第一方面，本申请提供了一种Spike蛋白的突变体，与野生的新型冠状病毒的Spike蛋白相比，其在对应于野生的新型冠状病毒的Spike蛋白的下述至少2个(例如，2个，3个，4个)氨基酸位点上包含突变：第417位的位点，第613位的位点，第614位的位点和第709位的位点。
在某些实施方案中，所述野生的新型冠状病毒的Spike蛋白的氨基酸序列如SEQID NO:1所示。
在某些实施方案中，所述Spike蛋白的突变体在对应于SEQ ID NO：1的第417位的位置上的氨基酸被突变为天冬氨酸。
在某些实施方案中，所述Spike蛋白的突变体在对应于SEQ ID NO：1的第613位的位置上的氨基酸被突变为组氨酸。
在某些实施方案中，所述Spike蛋白的突变体在对应于SEQ ID NO：1的第614位的位置上的氨基酸被突变为甘氨酸。
在某些实施方案中，所述Spike蛋白的突变体在对应于SEQ ID NO：1的第709位的位置上的氨基酸被突变为组氨酸。
在另一方面，本申请提供了如前所述的Spike蛋白的突变体，所述Spike蛋白的突变体还在C端截短了13-23个(例如，13个，14个，15个，16个，17个，18个，19个，20个，21个，22个，23个)氨基酸。
在某些实施方案中，所述Spike蛋白的突变体还在C端截短了21个氨基酸。
在某些实施方案中，与野生的新型冠状病毒的Spike蛋白相比，所述Spike蛋白的突变体还含有缺失，即，在下述位置上的氨基酸被缺失：与SEQ ID NO:1的第669-672位对应的位置。
在某些实施方案中，所述被缺失的氨基酸为furin酶切位点。
在某些实施方案中，所述被缺失的氨基酸为PRRA。
在某些实施方案中，所述Spike蛋白的突变体在对应于SEQ ID NO：1的第613位的位点上的氨基酸被突变为组氨酸，且在对应于SEQ ID NO：1的第614位的位点上的氨基酸被突变为甘氨酸。
在某些实施方案中，所述Spike蛋白的突变体在对应于SEQ ID NO：1的第614位的位点上的氨基酸被突变为甘氨酸，且在对应于SEQ ID NO：1的第709位的位点上的氨基酸被突变为组氨酸。
在某些实施方案中，所述Spike蛋白的突变体在对应于SEQ ID NO：1的第417位的位点上的氨基酸被突变为天冬氨酸，在对应于SEQ ID NO：1的第614位的位点上的氨基酸被突变为甘氨酸；且所述Spike蛋白的突变体还在C端截短了21个氨基酸。
在某些实施方案中，所述Spike蛋白的突变体在对应于SEQ ID NO：1的第417位的位点上的氨基酸被突变为天冬氨酸，在对应于SEQ ID NO：1的第613位的位点上的氨基酸被突变为组氨酸，在对应于SEQ ID NO：1的第614位的位点上的氨基酸被突变为甘氨酸，且在对应于SEQ ID NO：1的第709位的位点上的氨基酸被突变为组氨酸。
在某些实施方案中，所述Spike蛋白的突变体在对应于SEQ ID NO：1的第417位的位点上的氨基酸被突变为天冬氨酸，在对应于SEQ ID NO：1的第613位的位点上的氨基酸被突变为组氨酸，在对应于SEQ ID NO：1的第614位的位点上的氨基酸被突变为甘氨酸，在对应于SEQ ID NO：1的第709位的位点上的氨基酸被突变为组氨酸；且所述Spike蛋白的突变体还在C端截短了21个氨基酸。
在某些实施方案中，所述Spike蛋白的突变体在对应于SEQ ID NO：1的第417位的位点上的氨基酸被突变为天冬氨酸，在对应于SEQ ID NO：1的第613位的位点上的氨基酸被突变为组氨酸，在对应于SEQ ID NO：1的第614位的位点上的氨基酸被突变为甘氨酸，在对应于SEQ ID NO：1的第709位的位点上的氨基酸被突变为组氨酸；且所述Spike蛋白的突变体还在C端截短了21个氨基酸；与野生的新型冠状病毒的Spike蛋白相比，所述Spike蛋白的突变体还含有缺失，即，在下述位置上的氨基酸被缺失：与SEQ ID NO:1的第669-672位对应的位置。
在某些实施方案中，所述Spike蛋白的突变体具有如SEQ ID NO:5、6、7、10、11、12或13所示的氨基酸序列。
在某些实施方案中，所述Spike蛋白的突变体与SEQ ID NO:5、6、7、10、11、12或13所示的序列相比具有一个或多个氨基酸的置换、缺失或添加(例如1个，2个，3个，4个，5个，6个，7个，8个，9个或10个氨基酸的置换、缺失或添加；例如1个，2个，3个，4个，5个，6个，7个，8个，9个或10个氨基酸的保守置换)的氨基酸序列。
在某些实施方案中，所述Spike蛋白的突变体与SEQ ID NO:5、6、7、10、11、12或13所示的序列相比，具有至少95％、至少96％、至少97％、至少98％、或至少99％的序列同一性的氨基酸序列。
在另一方面，本申请提供了融合蛋白，其包含如前所述的Spike蛋白的突变体以及另外的多肽。
在某些实施方案中，所述另外的多肽任选地通过接头连接至所述蛋白的N端或C端。
在某些实施方案中，所述另外的多肽选自增强子、标签、信号肽或导肽、可检测的标记(例如，荧光素酶(fluc)、绿色荧光蛋白(GFP))，或其任意组合。
在某些实施方案中，所述另外的多肽为增强子，且所述增强子连接至所述Spike蛋白的突变体的N端。
在某些实施方案中，所述增强子具有如SEQ ID NO:14所示的核苷酸序列。
在另一方面，本申请提供了一种分离的核酸分子，其编码如前所述的Spike蛋白的突变体，或者编码如前所述的融合蛋白。
在另一方面，本申请提供了一种载体，其包含如前所述的核酸分子。
在某些实施方案中，所述载体选自质粒(例如，PCDNA3.1)，噬菌粒，柯斯质粒，人工染色体，噬菌体或病毒载体。
在某些实施方案中，所述载体用于表达(例如在受试者(例如哺乳动物，例如人)体内表达)所述Spike蛋白的突变体。
在另一方面，本申请提供了一种宿主细胞，其包含如前所述的核酸分子或如前所述的载体。
在某些实施方案中，所述细胞为哺乳动物的细胞。
在某些实施方案中，所述哺乳动物的细胞为人的细胞，例如，造血细胞，上皮细胞，肝细胞，肿瘤细胞，神经细胞。
在某些实施方案中，所述细胞为表达或过表达人ACE2蛋白的细胞(例如，293T细胞)。
在某些实施方案中，所述宿主细胞还包括包装质粒。
在另一方面，本申请提供了一种类病毒颗粒，所述类病毒颗粒含有如前所述的Spike蛋白的突变体或含有如前所述的融合蛋白；或者，所述类病毒颗粒由如前所述的Spike蛋白的突变体或如前所述的融合蛋白组成。
在某些实施方案中，所述类病毒颗粒还含有核酸组分。
在某些实施方案中，所述核酸组分为包装质粒。
在某些实施方案中，所述核酸组分获自VSV病毒基因组。
在另一方面，本申请提供了一种类病毒颗粒的制备方法，所述方法包括将如前所述的载体和包装质粒转入宿主细胞中。
在某些实施方案中，将如前所述的载体和包装质粒通过瞬时转染或稳定转染至宿主细胞中。
在某些实施方案中，所述方法包括将如前所述的载体和包装质粒转入宿主细胞中；然后，将VSV病毒感染所述宿主细胞。
在某些实施方案中，所述宿主细胞为人的细胞，例如，造血细胞，上皮细胞，肝细胞，肿瘤细胞，神经细胞。
在某些实施方案中，所述类病毒颗粒感染的细胞为过表达人ACE2蛋白的细胞(例如，293T-ACE2)。
在另一方面，本申请提供了一种检测SARS-CoV-2抗体中和活性的方法，所述方法包括，在将如前所述的类病毒颗粒与宿主细胞接触之前、同时或之后，将所述类病毒颗粒与所述抗体或宿主细胞接触。
在另一方面，本申请提供了一种筛选能够抑制SARS-CoV-2感染细胞的候选药物的方法，所述方法包括，在将如前所述的类病毒颗粒与宿主细胞接触之前、同时或之后，将所述类病毒颗粒或宿主细胞与所述候选药物接触。
在另一方面，本申请提供了如前所述的Spike蛋白的突变体、如前所述的融合蛋白、如前所述的分离的核酸分子、如前所述的载体、如前所述的宿主细胞、如前所述的类病毒颗粒用于检测或筛选抗SARS-CoV-2抗体或药物的用途。
术语定义
在本发明中，除非另有说明，否则本文中使用的科学和技术名词具有本领域技术人员所通常理解的含义。并且，本文中所用的分子遗传学、核酸化学、化学、分子生物学、生物化学、细胞培养、微生物学、细胞生物学、基因组学和重组DNA等操作步骤均为相应领域内广泛使用的常规步骤。同时，为了更好地理解本发明，下面提供相关术语的定义和解释。
如本文中所使用的，术语“SARS-CoV-2”为“严重急性呼吸综合征冠状病毒2(severe acute respiratory syndrome coronavirus 2)”的简称，旧称为“新型冠状病毒”，其属于β冠状病毒属，为含包膜的单链正义RNA病毒。SARS-CoV-2的基因组序列是本领域技术人员已知的，可参见例如GenBank：MN908947。SARS-CoV-2至少含有三种膜蛋白，包括表面刺突蛋白(S)、整合膜蛋白(M)和膜蛋白(E)。SARS-CoV-2的受体与SARS-CoV一样，均是通过S蛋白上的受体结合结构域(Receptor binding domain,RBD)与宿主细胞上的血管紧张素转移酶2(ACE2)特异性结合后，病毒进行膜融合和入胞，S蛋白在病毒感染细胞过程中起着至关重要的作用。
如本文中所使用的，术语“表面刺突蛋白”、“Spike蛋白”和“S蛋白”是指SARS-CoV-2的一种膜蛋白，它们具有相同的含义，可互换使用。
如本文中所使用的，术语“新型冠状病毒肺炎”是指，因SARS-CoV-2感染而导致的肺炎，二者具有相同的含义，可互换使用。
如本文中所使用的，术语“野生的”或“天然的”可互换地使用。当这些术语用于描述核酸分子、多肽或蛋白时，其表示该核酸分子、多肽或蛋白在自然界中存在，发现于自然界，并且未经过人工的任何修饰或加工。如本文中所使用的，野生的SARS-CoV-2的Spike蛋白是指天然存在的，具有生物学活性的Spike蛋白。本领域技术人员可以方便地从各种公共数据库(例如GenBank数据库)获得Spike蛋白的氨基酸序列。例如，野生的SARS-CoV-2的Spike蛋白的氨基酸序列可如SEQ ID NO：1所示。
如本文中所使用的，当提及野生的新型冠状病毒的Spike蛋白的氨基酸序列时，其使用SEQ ID NO：1所示的序列来进行描述。例如，表述“野生的新型冠状病毒的Spike蛋白的第614位氨基酸残基”是指，SEQ ID NO：1所示的蛋白的第614位氨基酸残基。然而，本领域技术人员理解，野生的新型冠状病毒的Spike蛋白可具有多种版本，它们具有基本上相同的一级结构(即，氨基酸序列)和高级结构(即，空间结构)，以及基本上相同的生物学功能，但是它们彼此之间在氨基酸序列上仍然可以存在微小差异。因此，在本申请中，野生的新型冠状病毒的Spike蛋白并不局限于SEQ ID NO：1所示的蛋白，而意欲涵盖所有已知的天然的Spike蛋白。因此，在本申请中，术语“野生的新型冠状病毒的Spike蛋白”应包括各种天然存在的、具有生物学功能的Spike蛋白，包括例如SEQ ID NO：1所示的Spike蛋白以及其天然存在的变体。并且，当描述Spike蛋白的氨基酸位置时，其不仅包括SEQ ID NO：1中的特定氨基酸位置，还包括其天然变体中与所述特定氨基酸位置对应的氨基酸位置。例如，表述“野生的新型冠状病毒的Spike蛋白的第614位氨基酸残基”包括，SEQ ID NO：1的第614位氨基酸残基，以及其天然变体中的相应氨基酸位置。根据本申请，表述“相应氨基酸位置”是指，当对序列进行最优比对时，即当序列进行比对以获得最高百分数同一性时，进行比较的序列中位于等同位置的氨基酸位置。类似地，表述“对应于SEQ ID NO:1的第614位的位置”是指，当对某一序列与SEQ ID NO:1进行最优比对时，即当某一序列与SEQ ID NO:1进行比对以获得最高百分数同一性时，进行比较的该序列中位于与SEQ ID NO:1的第614位等同位置的氨基酸位置。
在某些优选的实施方案中，野生的新型冠状病毒的Spike蛋白具有如SEQ ID NO:1所示的氨基酸序列。在某些优选的实施方案中，野生的新型冠状病毒的Spike蛋白是天然存在的、具有生物学功能的Spike蛋白，并且其氨基酸序列与SEQ ID NO:1相比，具有至少85％，至少90％，至少95％，至少96％，至少97％，至少98％，或至少99％的同一性。在某些优选的实施方案中，野生的新型冠状病毒的Spike蛋白是天然存在的、具有生物学功能的Spike蛋白，并且其氨基酸序列与SEQ ID NO:1相比，具有一个或多个(例如1-10个或1-5个或1-3个)氨基酸差异(例如，保守氨基酸置换)。
如本文中所使用的，术语“C端截短X个氨基酸”是指，C端最末端连续的X个氨基酸被截短。
如本文中所使用的，术语“假病毒”和“类病毒”二者具有相同的含义，可互换使用；其是指，由病毒蛋白自组装形成的一种类似于病毒的颗粒，其不包裹核酸或者包裹了其他核酸，从而，所述假病毒或类病毒虽然能够感染宿主细胞，但不具有自主复制能力。因此，与真正的病毒相比，其生物安全性高。假病毒的包装系统一般由两部分组成，即包装组分和表达组分。包装组分由病毒(例如，VSV)基因组去除了包装、逆转录和整合所需的遗传信息而构建，提供假病毒颗粒所必须的蛋白；表达组分则与包装组分互补，含有包装、逆转录和整合所需的遗传信息，同时含有外源目的基因。将包装组分与载体组分共同转染宿主细胞，即可在细胞上清中收获假病毒颗粒。
如本文中所使用的，术语“骨架质粒”和“包装质粒”具有相同的含义，可以互换使用。如本领域技术人员通常理解的，病毒载体系统(特别是慢病毒载体系统)可以由两部分组成，即，包装成分(例如包装质粒或骨架质粒)和载体成分(例如，携带目的基因的重组表达载体)；其中，包装成分(例如包装质粒或骨架质粒)可提供转录和包装遗传物质(例如RNA)到重组的假病毒颗粒内所需要的所有辅助蛋白。由此，可通过下述方式产生高滴度的假病毒颗粒：用重组表达载体和包装质粒共转染细胞，然后在细胞中进行假病毒的包装，随后包装好的假病毒颗粒分泌到细胞外的培养基中。此类包装质粒或骨架质粒是本领域技术人员熟知的，例如，以VSV为基础构建的骨架质粒。
如本文中所使用的，术语“同一性”用于指两个多肽之间或两个核酸之间序列的匹配情况。当两个进行比较的序列中的某个位置都被相同的碱基或氨基酸单体亚单元占据时(例如，两个DNA分子的每一个中的某个位置都被腺嘌呤占据，或两个多肽的每一个中的某个位置都被赖氨酸占据)，那么各分子在该位置上是同一的。两个序列之间的“百分数同一性”是由这两个序列共有的匹配位置数目除以进行比较的位置数目×100的函数。例如，如果两个序列的10个位置中有6个匹配，那么这两个序列具有60％的同一性。例如，DNA序列CTGACT和CAGGTT共有50％的同一性(总共6个位置中有3个位置匹配)。通常，在将两个序列比对以产生最大同一性时进行比较。这样的比对可通过使用，例如，可通过计算机程序例如Align程序(DNAstar,Inc.)方便地进行的Needleman等人(1970)J.Mol.Biol.48：443-453的方法来实现。还可使用已整合入ALIGN程序(版本2.0)的E.Meyers和W.Miller(Comput.ApplBiosci.，4:11-17(1988))的算法，使用PAM120权重残基表(weight residue table)、12的缺口长度罚分和4的缺口罚分来测定两个氨基酸序列之间的百分数同一性。此外，可使用已整合入GCG软件包(可在www.gcg.com上获得)的GAP程序中的Needleman和Wunsch(J MoIBiol.48:444-453(1970))算法，使用Blossum 62矩阵或PAM250矩阵以及16、14、12、10、8、6或4的缺口权重(gap weight)和1、2、3、4、5或6的长度权重来测定两个氨基酸序列之间的百分数同一性。
如本文中所使用的，术语“保守置换”意指不会不利地影响或改变包含氨基酸序列的蛋白/多肽的生物学活性的氨基酸置换。例如，可通过本领域内已知的标准技术例如定点诱变和PCR介导的诱变引入保守置换。保守氨基酸置换包括用具有相似侧链的氨基酸残基替代氨基酸残基的置换，例如用在物理学上或功能上与相应的氨基酸残基相似(例如具有相似大小、形状、电荷、化学性质，包括形成共价键或氢键的能力等)的残基进行的置换。已在本领域内定义了具有相似侧链的氨基酸残基的家族。这些家族包括具有碱性侧链(例如，赖氨酸、精氨酸和组氨酸)、酸性侧链(例如天冬氨酸、谷氨酸)、不带电荷的极性侧链(例如甘氨酸、天冬酰胺、谷氨酰胺、丝氨酸、苏氨酸、酪氨酸、半胱氨酸、色氨酸)、非极性侧链(例如丙氨酸、缬氨酸、亮氨酸、异亮氨酸、脯氨酸、苯丙氨酸、甲硫氨酸)、β分支侧链(例如，苏氨酸、缬氨酸、异亮氨酸)和芳香族侧链(例如，酪氨酸、苯丙氨酸、色氨酸、组氨酸)的氨基酸。因此，优选用来自相同侧链家族的另一个氨基酸残基替代相应的氨基酸残基。鉴定氨基酸保守置换的方法在本领域内是熟知的(参见，例如，Brummell等人，Biochem.32:1180-1187(1993)；Kobayashi等人Protein Eng.12(10):879-884(1999)；和Burks等人Proc.NatlAcad.Set USA 94:412-417(1997)，其通过引用并入本文)。
如本文中所使用的，术语“载体”是指，可将多聚核苷酸插入其中的一种核酸运载工具。当载体能使插入的多核苷酸编码的蛋白获得表达时，载体称为表达载体。载体可以通过转化，转导或者转染导入宿主细胞，使其携带的遗传物质元件在宿主细胞中获得表达。载体是本领域技术人员公知的，包括但不限于：质粒；噬菌粒；柯斯质粒；人工染色体，例如酵母人工染色体(YAC)、细菌人工染色体(BAC)或P1来源的人工染色体(PAC)；噬菌体如λ噬菌体或M13噬菌体及动物病毒等。可用作载体的动物病毒包括但不限于，逆转录酶病毒(包括慢病毒)、腺病毒、腺相关病毒、疱疹病毒(如单纯疱疹病毒)、痘病毒、杆状病毒、乳头瘤病毒、乳头多瘤空泡病毒(如SV40)。一种载体可以含有多种控制表达的元件，包括但不限于，启动子序列、转录起始序列、增强子序列、选择元件及报告基因。另外，载体还可含有复制起始位点。
如本文中所使用的，术语“宿主细胞”是指，可用于导入载体的细胞，其包括但不限于，如大肠杆菌或枯草菌等的原核细胞，如酵母细胞或曲霉菌等的真菌细胞，如S2果蝇细胞或Sf9等的昆虫细胞，或者如纤维原细胞，CHO细胞，COS细胞，NSO细胞，HeLa细胞，BHK细胞，HEK 293细胞或人细胞等的动物细胞。
本领域技术人员将理解，表达载体的设计可取决于诸如待转化的宿主细胞的选择、所希望的表达水平等因素。一种载体可以被引入到宿主细胞中而由此产生转录物、蛋白质、或肽，包括由如本文所述的蛋白、融合蛋白、分离的核酸分子等。
如本文中所使用的，术语“有效量”是指能够有效实现预期目的的量。例如，预防或治疗疾病(例如轮状病毒感染)有效量是指，能够有效预防、阻止或延迟疾病(例如轮状病毒感染)的发生、或缓解、减轻或治疗已有的疾病(例如由轮状病毒感染所导致的疾病)的严重程度的量。测定这样的有效量在本领域技术人员的能力范围之内。例如，对于治疗用途有效的量将取决于待治疗的疾病的严重度、患者自己的免疫系统的总体状态、患者的一般情况例如年龄，体重和性别，药物的施用方式，以及同时施用的其他治疗等等。
如本文中所使用的，术语“中和活性”是指抗体或抗体片段具有与病毒上的抗原蛋白相结合，从而阻止病毒感染细胞和/或病毒子代的成熟和/或病毒子代的释放的功能活性，具有中和活性的抗体或抗体片段可以阻止病毒的扩增，从而抑制或消除病毒的感染。
发明的有益效果
与现有技术相比，本申请制备的SARS-CoV-2的假病毒滴度提高了至少17倍，并且经滴度检测还发现该假病毒在稀释了49倍后，其化学发光值仍为千万级。本申请的假病毒的研制，使得SARS-CoV-2的研究不局限于高等生物安全条件的实验室。并且，所述假病毒能够应用于抗体中和能力的检测，为SARS-CoV-2疫苗、药物评价、及病毒致病机制的研究提供了良好的技术支撑手段。
下面将结合附图和实施例对本发明的实施方案进行详细描述，但是本领域技术人员将理解，下列附图和实施例仅用于说明本发明，而不是对本发明的范围的限定。根据附图和优选实施方案的下列详细描述，本发明的各种目的和有利方面对于本领域技术人员来说将变得显然。
附图说明
图1显示了实施例1中构建的12种重组载体所制备的假病毒的荧光值(RLU)。
图2显示了实施例1中构建的3种重组载体所制备的假病毒的组织半数感染量(TICD50)。
图3显示了构建3种重组载体所制备的假病毒的荧光值(RLU)。
图4显示了构建的重组载体通过稳定转染和瞬时转染所制备的假病毒的荧光值(RLU)。
序列信息
本发明涉及的部分序列的信息提供于下面的表1中。
表1：序列的描述
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具体实施方式
现参照下列意在举例说明本发明(而非限定本发明)的实施例来描述本发明。
除非特别指明，否则基本上按照本领域内熟知的以及在各种参考文献中描述的常规方法进行实施例中描述的实验和方法。例如，本发明中所使用的免疫学、生物化学、化学、分子生物学、微生物学、细胞生物学、基因组学和重组DNA等常规技术，可参见萨姆布鲁克(Sambrook)、弗里奇(Fritsch)和马尼亚蒂斯(Maniatis)，《分子克隆：实验室手册》(MOLECULAR CLONING:A LABORATORY MANUAL)，第2次编辑(1989)；《当代分子生物学实验手册》(CURRENT PROTOCOLS IN MOLECULAR BIOLOGY)(F.M.奥苏贝尔(F.M.Ausubel)等人编辑，(1987))；《酶学方法》(METHODS IN ENZYMOLOGY)系列(学术出版公司)：《PCR 2：实用方法》(PCR 2:A PRACTICAL APPROACH)(M.J.麦克弗森(M.J.MacPherson)、B.D.黑姆斯(B.D.Hames)和G.R.泰勒(G.R.Taylor)编辑(1995))，以及《动物细胞培养》(ANIMAL CELLCULTURE)(R.I.弗雷谢尼(R.I.Freshney)编辑(1987))。
另外，实施例中未注明具体条件者，按照常规条件或制造商建议的条件进行。所用试剂或仪器未注明生产厂商者，均为可以通过市购获得的常规产品。本领域技术人员知晓，实施例以举例方式描述本发明，且不意欲限制本发明所要求保护的范围。本文中提及的全部公开案和其他参考资料以其全文通过引用合并入本文。
实施例1.重组载体的构建
将编码Spike蛋白的核苷酸序列分别连接到PCDNA3.1质粒上，以构建重组载体。以SARS-CoV-2病毒株的Spike蛋白(SEQ ID NO:1)为基础，分别进行改造并构建下述重组载体：
(1)以如SEQ ID NO:1所示的Spike蛋白为基础构建重组载体，并将其命名为病毒株-1；
(2)先将如SEQ ID NO:1所示的Spike蛋白的C端胞内区截短21个氨基酸，在此基础上，再将Furin酶酶切位点删除，即上述spike蛋白的第669-672位对应的氨基酸(即PRRA)删除。经上述改造后的序列如SEQ ID NO:2所示，以其为基础构建重组载体并将构建的重组载体命名为ΔC端21aa+Δfurin；
(3)将如SEQ ID NO:1所示的Spike蛋白的第614位氨基酸(即，D)突变为G，经上述改造后的序列如SEQ ID NO:3所示，以其为基础构建重组载体并将构建的重组载体命名为D614G；
(4)将Spike蛋白的Furin酶酶切位点删除，即将SEQ ID NO:1的第669-672位对应的氨基酸(即PRRA)删除，且将第614位氨基酸D突变为G，经上述改造后的序列如SEQ ID NO:4所示，以其为基础构建重组载体并将构建的重组载体命名为D614G+ΔFurin；
(5)将如SEQ ID NO:1所示的Spike蛋白的第614位氨基酸D突变为G，第417位氨基酸由K突变为N，经上述改造后的序列如SEQ ID NO:5所示，以其为基础构建重组载体并将构建的重组载体命名为D614G+K417N；
(6)将如SEQ ID NO:1所示的Spike蛋白的第614位氨基酸D突变为G，且第613位氨基酸由Q突变为H，经上述改造后的序列如SEQ ID NO:6所示，以其为基础构建重组载体并将构建的重组载体命名为D614G+Q613H；
(7)将如SEQ ID NO:1所示的Spike蛋白的第614位氨基酸D突变为G，且第709位氨基酸由N突变为H，经上述改造后的序列如SEQ ID NO:7所示，以其为基础构建重组载体并将构建的重组载体命名为D614G+N709H；
(8)将如SEQ ID NO:1所示的Spike蛋白的C端胞内区截短21个氨基酸，且将第614位氨基酸D突变为G，经上述改造后的序列如SEQ ID NO:8所示，以其为基础构建重组载体并将构建的重组载体命名为D614G+ΔC端21aa；
(9)先将如SEQ ID NO:1的Spike蛋白的C端胞内区截短21个氨基酸，在此基础上，再将Furin酶酶切位点删除，即上述spike蛋白的第669-672位对应氨基酸删除(即PRRA)，然后将Spike的第614位氨基酸D突变为G，经上述改造后的序列如SEQ ID NO:9所示，以其为基础构建重组载体并将构建的重组载体命名为D614G+ΔC端21aa+ΔFurin；
(10)先将如SEQ ID NO:1的Spike蛋白的C端胞内区截短21个氨基酸，然后将Spike的第614位氨基酸D突变为G，第417位氨基酸K突变为N，经上述改造后的序列如SEQ ID NO:10所示，以其为基础构建重组载体并将构建的重组载体命名为D614G+C端21aa+K417N；
(11)将Spike的第614位氨基酸D突变为G，第417位氨基酸K突变为N，第613位氨基酸Q突变为H，第709位氨基酸N突变为H，经上述改造后的序列如SEQ ID NO:13所示，以其为基础构建重组载体并将构建的重组载体命名为D614G++K417N+Q613H+N709H；(12)先将如SEQ ID NO:1的Spike蛋白的C端胞内区截短21个氨基酸，然后将Spike的第614位氨基酸D突变为G，第417位氨基酸K突变为N，第613位氨基酸Q突变为H，第709位氨基酸N突变为H，经上述改造后的序列如SEQ ID NO:11所示，将构建的重组载体命名为D614G+ΔC端21aa+K417N+Q613H+N709H；
(13)先将如SEQ ID NO:1的Spike蛋白的C端胞内区截短21个氨基酸，在此基础上，再将Furin酶酶切位点删除，即上述spike蛋白的第669-672位对应氨基酸删除(即PRRA)，然后将Spike的第614位氨基酸D突变为G，第417位氨基酸K突变为N，第613位氨基酸Q突变为H，第709位氨基酸N突变为H，经上述改造后的序列如SEQ ID NO:12所示，将构建的重组载体命名为D614G+ΔC端21aa+K417N+Q613H+ΔFurin+N709H；
具体过程如下：将双酶切后的质粒PCDNA3.1使用康为世纪公司的快速琼脂糖凝胶DNA回收试剂盒回收，与目的片段混匀，加入Infusion酶，置于PCR仪上，50℃连接15分钟。取上述连接产物转入50μl DH5α感受态细胞中，冰上放置30min。将感受态细胞取出后，于42℃水浴中热激45-60s，迅速放置冰上2min。加入500μl无抗LB培养基，放置于37℃摇床中，120rpm振荡培养1小时；将培养后的感受态细胞于2800rpm离心2min，弃500μl上清，剩余菌体混匀后涂抹在氨苄抗性(Amp)的平板上；37℃培养箱中，倒置培养过夜(14-16小时)；挑取单克隆菌落，接种于5mL LB培养基(100μg/mL Amp)中，放置于37℃摇床中，220rpm振荡培养14-16小时，保存于甘油中，并送测序公司对所得表达质粒进行鉴定。
实施例2.假病毒生产及滴度检测
将实施例1构建的SARS-CoV-2Spike蛋白重组质粒转染293T细胞，使其在细胞内表达新冠病毒的Spike蛋白，并转移至细胞膜上。同时，使用复制缺陷型VSV假病毒感染转染后的293T细胞，提供VSV除表面蛋白外的其它基因组，培养24h后收集上清液，即为第一批假病毒。之后添加完全培养基到细胞中，继续培养24h后收集第二批假病毒。将第一批和第二批假病毒混匀，0.25uM滤膜过滤、离心、过滤后感染靶细胞如Huh7细胞，使用PE(PerkinElmer)萤火虫荧光素酶单报告基因检测系统以及PE(PerkinElmer)公司EnSight仪器检测细胞Luciferase发光值。
结果如图1所示，构建的假病毒D614G+K417N+Q613H+N709H显示出了优异的效果，其化学发光值(RLU)较病毒株-1提高了10.4倍。进一步的，D614G+ΔC端21aa+K417N+Q613H+N709H显示出了突出的优异效果。其化学发光值(RLU)较病毒株-1提高了21.8倍，结果具有显著性差异。此外，假病毒D614G+K417N，D614G+Q613H，D614G+N709H和D614G+ΔC端21aa的RLU检测值较病毒株-1相比分别提高了5.24、7.22、6.90和10.83。而假病毒D614G+ΔC端21aa+K417N+613H+N709H在上述假病毒的基础上，RLU又进一步提高了2-3倍左右。
此外，在之前的实验中显示出突出效果的重组质粒，即重组质粒ΔC端21aa+ΔFurin，生产假病毒后发现其RLU值比病毒株-1高了4.04倍。而本申请的D614G+ΔC端21aa+K417N+613H+N709H假病毒比ΔC端21aa+ΔFurin假病毒RLU值又高了5.38倍，大大提高了假病毒表达滴度。
进一步的，经滴度检测还发现D614G+ΔC端21aa+K417N+Q613H+N709H假病毒株在稀释了49倍后，其RLU值仍为千万级。稀释343倍后，RLU值仍为百万级。而D614G假病毒RLU值若想保持千万级只可稀释7倍，保持百万级只可稀释49倍。D614G+ΔC端21aa+K417N+Q613H+N709H株的这一特性，大大提高了假病毒用于抗体中和检测的能力。同时TCID50值显示D614G+ΔC端21aa+K417N+Q613H+N709H假病毒的滴度大大提高，较D614G提高了130倍(图2)。
实施例3.Spike包膜质粒的增强子优化
经前期优化，将如SEQ ID NO:14所示的病毒增强子序列，通过分子克隆技术置于构建的重组载体D614G+ΔC端21aa+K417N+Q613H+N709H的起始密码子之前，如实施例1和2所述的方法构建假病毒，并将其命名为K417N+Q613H+D614G+N709H+ΔC端21aa+增强子。
按照实施例2描述的方法检测细胞的化学发光值，结果如图3所示。结果显示，该增强子可提升新冠病毒的Spike表达和假病毒包装，使含增强子的假病毒的RLU值达到亿级以上，比不使用增强子的D614G+ΔC端21aa+K417N+Q613H+N709H(即，图3中的K417N+Q613H+D614G+N709H+ΔC端21aa)的数值进一步提升了2倍，具有显著差异。
实施例4.不同293T细胞系包被高滴度株的优化
按照如实施例1、2的方法，使用不同的293T细胞系包被假病毒。具体来说，使用相同的293T细胞系分别包被假病毒D614G+ΔC端21aa+K417N+Q613H+N709H和D614G+ΔC端21aa+K417N+Q613H+ΔFurin+N709H。
实验结果证实，D614G+ΔC端21aa+K417N+Q613H+N709H的RLU值均显著高于D614G+ΔC端21aa+K417N+Q613H+ΔFurin+N709H，说明在不同的293T细胞系中D614G+ΔC端21aa+K417N+Q613H+N709H的效果稳定。
并且实验结果证实，293T系列细胞都可用于包被本申请的假病毒，且RLU值均可高达9位数，并且稀释343倍后仍有8位数。
实施例5.Spike蛋白稳转细胞系包被假病毒及优化
本实施例通过稳定转染与瞬时转染两种不同方法构建假病毒并进行滴度比对。
本实施例使用的稳定转染构建假病毒的方法和步骤如实施例1、2中所述。
本领域常规使用的瞬时转染方法如下(转染试剂采用Invitrogen公司的Lipofectamine3000脂质体)：a、转染前一天铺293T细胞，4～6×105个/mL到合适的培养板或者培养瓶中，转染时细胞长至80～90％左右；b、根据说明书中提供的参考比例进行转染，以六孔板板为例；c、首先将opti-MEM平衡至室温；d、在250μL opti-MEM中加入2μg DNA，4μLP3000轻轻混匀；e、在250μL opti-MEM中加入4μL Lipofectamine3000，轻轻混匀，室温放置5min；f、将上述两溶液混合，室温放置15min；g、将混合溶液加入六孔板中，注意要轻，防止吹起细胞，摇匀；h、37℃，5％CO2培养4～6h，更换新鲜培养基。
实验结果如图4所示，本申请构建的Spike蛋白突变体稳转细胞系可经VSV包装系统包被假病毒，且基本能达到与瞬时转染质粒转染相似的水平，可用于生产使用。
实验结果显示，使用稳定表达Spike蛋白的293T细胞系用于包被假病毒，可以省去Spike质粒转染等步骤，优化了包毒程序，并且不需要转染试剂lipo3000等，节省了成本，且Spike蛋白表达较瞬时转染更稳定持续，具有大规模生产的优势。
尽管本发明的具体实施方式已经得到详细的描述，但本领域技术人员将理解：根据已经公布的所有教导，可以对细节进行各种修改和变动，并且这些改变均在本发明的保护范围之内。本发明的全部分为由所附权利要求及其任何等同物给出。
SEQUENCE LISTING
<110> 中国食品药品检定研究院
<120> 一种改造的高滴度SARS-CoV-2假病毒
<130> IDC210372
<160> 14
<170> PatentIn version 3.5
<210> 1
<211> 1273
<212> PRT
<213> artificial
<220>
<223> 病毒株-1的插入片段
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Val Ala Lys Asn Leu Asn Glu Ser Leu Ile Asp Leu Gln Glu Leu
1190 1195 1200
Gly Lys Tyr Glu Gln Tyr Ile Lys Trp Pro Trp Tyr Ile Trp Leu
1205 1210 1215
Gly Phe Ile Ala Gly Leu Ile Ala Ile Val Met Val Thr Ile Met
1220 1225 1230
Leu Cys Cys Met Thr Ser Cys Cys Ser Cys Leu Lys Gly Cys Cys
1235 1240 1245
Ser Cys Gly Ser Cys Cys Lys Phe Asp Glu Asp Asp Ser Glu Pro
1250 1255 1260
Val Leu Lys Gly Val Lys Leu His Tyr Thr
1265 1270
<210> 2
<211> 1248
<212> PRT
<213> artificial
<220>
<223> ΔC端21aa+Δfurin的插入片段
<400> 2
Met Phe Val Phe Leu Val Leu Leu Pro Leu Val Ser Ser Gln Cys Val
1 5 10 15
Asn Leu Thr Thr Arg Thr Gln Leu Pro Pro Ala Tyr Thr Asn Ser Phe
20 25 30
Thr Arg Gly Val Tyr Tyr Pro Asp Lys Val Phe Arg Ser Ser Val Leu
35 40 45
His Ser Thr Gln Asp Leu Phe Leu Pro Phe Phe Ser Asn Val Thr Trp
50 55 60
Phe His Ala Ile His Val Ser Gly Thr Asn Gly Thr Lys Arg Phe Asp
65 70 75 80
Asn Pro Val Leu Pro Phe Asn Asp Gly Val Tyr Phe Ala Ser Thr Glu
85 90 95
Lys Ser Asn Ile Ile Arg Gly Trp Ile Phe Gly Thr Thr Leu Asp Ser
100 105 110
Lys Thr Gln Ser Leu Leu Ile Val Asn Asn Ala Thr Asn Val Val Ile
115 120 125
Lys Val Cys Glu Phe Gln Phe Cys Asn Asp Pro Phe Leu Gly Val Tyr
130 135 140
Tyr His Lys Asn Asn Lys Ser Trp Met Glu Ser Glu Phe Arg Val Tyr
145 150 155 160
Ser Ser Ala Asn Asn Cys Thr Phe Glu Tyr Val Ser Gln Pro Phe Leu
165 170 175
Met Asp Leu Glu Gly Lys Gln Gly Asn Phe Lys Asn Leu Arg Glu Phe
180 185 190
Val Phe Lys Asn Ile Asp Gly Tyr Phe Lys Ile Tyr Ser Lys His Thr
195 200 205
Pro Ile Asn Leu Val Arg Asp Leu Pro Gln Gly Phe Ser Ala Leu Glu
210 215 220
Pro Leu Val Asp Leu Pro Ile Gly Ile Asn Ile Thr Arg Phe Gln Thr
225 230 235 240
Leu Leu Ala Leu His Arg Ser Tyr Leu Thr Pro Gly Asp Ser Ser Ser
245 250 255
Gly Trp Thr Ala Gly Ala Ala Ala Tyr Tyr Val Gly Tyr Leu Gln Pro
260 265 270
Arg Thr Phe Leu Leu Lys Tyr Asn Glu Asn Gly Thr Ile Thr Asp Ala
275 280 285
Val Asp Cys Ala Leu Asp Pro Leu Ser Glu Thr Lys Cys Thr Leu Lys
290 295 300
Ser Phe Thr Val Glu Lys Gly Ile Tyr Gln Thr Ser Asn Phe Arg Val
305 310 315 320
Gln Pro Thr Glu Ser Ile Val Arg Phe Pro Asn Ile Thr Asn Leu Cys
325 330 335
Pro Phe Gly Glu Val Phe Asn Ala Thr Arg Phe Ala Ser Val Tyr Ala
340 345 350
Trp Asn Arg Lys Arg Ile Ser Asn Cys Val Ala Asp Tyr Ser Val Leu
355 360 365
Tyr Asn Ser Ala Ser Phe Ser Thr Phe Lys Cys Tyr Gly Val Ser Pro
370 375 380
Thr Lys Leu Asn Asp Leu Cys Phe Thr Asn Val Tyr Ala Asp Ser Phe
385 390 395 400
Val Ile Arg Gly Asp Glu Val Arg Gln Ile Ala Pro Gly Gln Thr Gly
405 410 415
Lys Ile Ala Asp Tyr Asn Tyr Lys Leu Pro Asp Asp Phe Thr Gly Cys
420 425 430
Val Ile Ala Trp Asn Ser Asn Asn Leu Asp Ser Lys Val Gly Gly Asn
435 440 445
Tyr Asn Tyr Leu Tyr Arg Leu Phe Arg Lys Ser Asn Leu Lys Pro Phe
450 455 460
Glu Arg Asp Ile Ser Thr Glu Ile Tyr Gln Ala Gly Ser Thr Pro Cys
465 470 475 480
Asn Gly Val Glu Gly Phe Asn Cys Tyr Phe Pro Leu Gln Ser Tyr Gly
485 490 495
Phe Gln Pro Thr Asn Gly Val Gly Tyr Gln Pro Tyr Arg Val Val Val
500 505 510
Leu Ser Phe Glu Leu Leu His Ala Pro Ala Thr Val Cys Gly Pro Lys
515 520 525
Lys Ser Thr Asn Leu Val Lys Asn Lys Cys Val Asn Phe Asn Phe Asn
530 535 540
Gly Leu Thr Gly Thr Gly Val Leu Thr Glu Ser Asn Lys Lys Phe Leu
545 550 555 560
Pro Phe Gln Gln Phe Gly Arg Asp Ile Ala Asp Thr Thr Asp Ala Val
565 570 575
Arg Asp Pro Gln Thr Leu Glu Ile Leu Asp Ile Thr Pro Cys Ser Phe
580 585 590
Gly Gly Val Ser Val Ile Thr Pro Gly Thr Asn Thr Ser Asn Gln Val
595 600 605
Ala Val Leu Tyr Gln Asp Val Asn Cys Thr Glu Val Pro Val Ala Ile
610 615 620
His Ala Asp Gln Leu Thr Pro Thr Trp Arg Val Tyr Ser Thr Gly Ser
625 630 635 640
Asn Val Phe Gln Thr Arg Ala Gly Cys Leu Ile Gly Ala Glu His Val
645 650 655
Asn Asn Ser Tyr Glu Cys Asp Ile Pro Ile Gly Ala Gly Ile Cys Ala
660 665 670
Ser Tyr Gln Thr Gln Thr Asn Ser Arg Ser Val Ala Ser Gln Ser Ile
675 680 685
Ile Ala Tyr Thr Met Ser Leu Gly Ala Glu Asn Ser Val Ala Tyr Ser
690 695 700
Asn Asn Ser Ile Ala Ile Pro Thr Asn Phe Thr Ile Ser Val Thr Thr
705 710 715 720
Glu Ile Leu Pro Val Ser Met Thr Lys Thr Ser Val Asp Cys Thr Met
725 730 735
Tyr Ile Cys Gly Asp Ser Thr Glu Cys Ser Asn Leu Leu Leu Gln Tyr
740 745 750
Gly Ser Phe Cys Thr Gln Leu Asn Arg Ala Leu Thr Gly Ile Ala Val
755 760 765
Glu Gln Asp Lys Asn Thr Gln Glu Val Phe Ala Gln Val Lys Gln Ile
770 775 780
Tyr Lys Thr Pro Pro Ile Lys Asp Phe Gly Gly Phe Asn Phe Ser Gln
785 790 795 800
Ile Leu Pro Asp Pro Ser Lys Pro Ser Lys Arg Ser Phe Ile Glu Asp
805 810 815
Leu Leu Phe Asn Lys Val Thr Leu Ala Asp Ala Gly Phe Ile Lys Gln
820 825 830
Tyr Gly Asp Cys Leu Gly Asp Ile Ala Ala Arg Asp Leu Ile Cys Ala
835 840 845
Gln Lys Phe Asn Gly Leu Thr Val Leu Pro Pro Leu Leu Thr Asp Glu
850 855 860
Met Ile Ala Gln Tyr Thr Ser Ala Leu Leu Ala Gly Thr Ile Thr Ser
865 870 875 880
Gly Trp Thr Phe Gly Ala Gly Ala Ala Leu Gln Ile Pro Phe Ala Met
885 890 895
Gln Met Ala Tyr Arg Phe Asn Gly Ile Gly Val Thr Gln Asn Val Leu
900 905 910
Tyr Glu Asn Gln Lys Leu Ile Ala Asn Gln Phe Asn Ser Ala Ile Gly
915 920 925
Lys Ile Gln Asp Ser Leu Ser Ser Thr Ala Ser Ala Leu Gly Lys Leu
930 935 940
Gln Asp Val Val Asn Gln Asn Ala Gln Ala Leu Asn Thr Leu Val Lys
945 950 955 960
Gln Leu Ser Ser Asn Phe Gly Ala Ile Ser Ser Val Leu Asn Asp Ile
965 970 975
Leu Ser Arg Leu Asp Lys Val Glu Ala Glu Val Gln Ile Asp Arg Leu
980 985 990
Ile Thr Gly Arg Leu Gln Ser Leu Gln Thr Tyr Val Thr Gln Gln Leu
995 1000 1005
Ile Arg Ala Ala Glu Ile Arg Ala Ser Ala Asn Leu Ala Ala Thr
1010 1015 1020
Lys Met Ser Glu Cys Val Leu Gly Gln Ser Lys Arg Val Asp Phe
1025 1030 1035
Cys Gly Lys Gly Tyr His Leu Met Ser Phe Pro Gln Ser Ala Pro
1040 1045 1050
His Gly Val Val Phe Leu His Val Thr Tyr Val Pro Ala Gln Glu
1055 1060 1065
Lys Asn Phe Thr Thr Ala Pro Ala Ile Cys His Asp Gly Lys Ala
1070 1075 1080
His Phe Pro Arg Glu Gly Val Phe Val Ser Asn Gly Thr His Trp
1085 1090 1095
Phe Val Thr Gln Arg Asn Phe Tyr Glu Pro Gln Ile Ile Thr Thr
1100 1105 1110
Asp Asn Thr Phe Val Ser Gly Asn Cys Asp Val Val Ile Gly Ile
1115 1120 1125
Val Asn Asn Thr Val Tyr Asp Pro Leu Gln Pro Glu Leu Asp Ser
1130 1135 1140
Phe Lys Glu Glu Leu Asp Lys Tyr Phe Lys Asn His Thr Ser Pro
1145 1150 1155
Asp Val Asp Leu Gly Asp Ile Ser Gly Ile Asn Ala Ser Val Val
1160 1165 1170
Asn Ile Gln Lys Glu Ile Asp Arg Leu Asn Glu Val Ala Lys Asn
1175 1180 1185
Leu Asn Glu Ser Leu Ile Asp Leu Gln Glu Leu Gly Lys Tyr Glu
1190 1195 1200
Gln Tyr Ile Lys Trp Pro Trp Tyr Ile Trp Leu Gly Phe Ile Ala
1205 1210 1215
Gly Leu Ile Ala Ile Val Met Val Thr Ile Met Leu Cys Cys Met
1220 1225 1230
Thr Ser Cys Cys Ser Cys Leu Lys Gly Cys Cys Ser Cys Gly Ser
1235 1240 1245
<210> 3
<211> 1273
<212> PRT
<213> artificial
<220>
<223> D614G的插入片段
<400> 3
Met Phe Val Phe Leu Val Leu Leu Pro Leu Val Ser Ser Gln Cys Val
1 5 10 15
Asn Leu Thr Thr Arg Thr Gln Leu Pro Pro Ala Tyr Thr Asn Ser Phe
20 25 30
Thr Arg Gly Val Tyr Tyr Pro Asp Lys Val Phe Arg Ser Ser Val Leu
35 40 45
His Ser Thr Gln Asp Leu Phe Leu Pro Phe Phe Ser Asn Val Thr Trp
50 55 60
Phe His Ala Ile His Val Ser Gly Thr Asn Gly Thr Lys Arg Phe Asp
65 70 75 80
Asn Pro Val Leu Pro Phe Asn Asp Gly Val Tyr Phe Ala Ser Thr Glu
85 90 95
Lys Ser Asn Ile Ile Arg Gly Trp Ile Phe Gly Thr Thr Leu Asp Ser
100 105 110
Lys Thr Gln Ser Leu Leu Ile Val Asn Asn Ala Thr Asn Val Val Ile
115 120 125
Lys Val Cys Glu Phe Gln Phe Cys Asn Asp Pro Phe Leu Gly Val Tyr
130 135 140
Tyr His Lys Asn Asn Lys Ser Trp Met Glu Ser Glu Phe Arg Val Tyr
145 150 155 160
Ser Ser Ala Asn Asn Cys Thr Phe Glu Tyr Val Ser Gln Pro Phe Leu
165 170 175
Met Asp Leu Glu Gly Lys Gln Gly Asn Phe Lys Asn Leu Arg Glu Phe
180 185 190
Val Phe Lys Asn Ile Asp Gly Tyr Phe Lys Ile Tyr Ser Lys His Thr
195 200 205
Pro Ile Asn Leu Val Arg Asp Leu Pro Gln Gly Phe Ser Ala Leu Glu
210 215 220
Pro Leu Val Asp Leu Pro Ile Gly Ile Asn Ile Thr Arg Phe Gln Thr
225 230 235 240
Leu Leu Ala Leu His Arg Ser Tyr Leu Thr Pro Gly Asp Ser Ser Ser
245 250 255
Gly Trp Thr Ala Gly Ala Ala Ala Tyr Tyr Val Gly Tyr Leu Gln Pro
260 265 270
Arg Thr Phe Leu Leu Lys Tyr Asn Glu Asn Gly Thr Ile Thr Asp Ala
275 280 285
Val Asp Cys Ala Leu Asp Pro Leu Ser Glu Thr Lys Cys Thr Leu Lys
290 295 300
Ser Phe Thr Val Glu Lys Gly Ile Tyr Gln Thr Ser Asn Phe Arg Val
305 310 315 320
Gln Pro Thr Glu Ser Ile Val Arg Phe Pro Asn Ile Thr Asn Leu Cys
325 330 335
Pro Phe Gly Glu Val Phe Asn Ala Thr Arg Phe Ala Ser Val Tyr Ala
340 345 350
Trp Asn Arg Lys Arg Ile Ser Asn Cys Val Ala Asp Tyr Ser Val Leu
355 360 365
Tyr Asn Ser Ala Ser Phe Ser Thr Phe Lys Cys Tyr Gly Val Ser Pro
370 375 380
Thr Lys Leu Asn Asp Leu Cys Phe Thr Asn Val Tyr Ala Asp Ser Phe
385 390 395 400
Val Ile Arg Gly Asp Glu Val Arg Gln Ile Ala Pro Gly Gln Thr Gly
405 410 415
Lys Ile Ala Asp Tyr Asn Tyr Lys Leu Pro Asp Asp Phe Thr Gly Cys
420 425 430
Val Ile Ala Trp Asn Ser Asn Asn Leu Asp Ser Lys Val Gly Gly Asn
435 440 445
Tyr Asn Tyr Leu Tyr Arg Leu Phe Arg Lys Ser Asn Leu Lys Pro Phe
450 455 460
Glu Arg Asp Ile Ser Thr Glu Ile Tyr Gln Ala Gly Ser Thr Pro Cys
465 470 475 480
Asn Gly Val Glu Gly Phe Asn Cys Tyr Phe Pro Leu Gln Ser Tyr Gly
485 490 495
Phe Gln Pro Thr Asn Gly Val Gly Tyr Gln Pro Tyr Arg Val Val Val
500 505 510
Leu Ser Phe Glu Leu Leu His Ala Pro Ala Thr Val Cys Gly Pro Lys
515 520 525
Lys Ser Thr Asn Leu Val Lys Asn Lys Cys Val Asn Phe Asn Phe Asn
530 535 540
Gly Leu Thr Gly Thr Gly Val Leu Thr Glu Ser Asn Lys Lys Phe Leu
545 550 555 560
Pro Phe Gln Gln Phe Gly Arg Asp Ile Ala Asp Thr Thr Asp Ala Val
565 570 575
Arg Asp Pro Gln Thr Leu Glu Ile Leu Asp Ile Thr Pro Cys Ser Phe
580 585 590
Gly Gly Val Ser Val Ile Thr Pro Gly Thr Asn Thr Ser Asn Gln Val
595 600 605
Ala Val Leu Tyr Gln Gly Val Asn Cys Thr Glu Val Pro Val Ala Ile
610 615 620
His Ala Asp Gln Leu Thr Pro Thr Trp Arg Val Tyr Ser Thr Gly Ser
625 630 635 640
Asn Val Phe Gln Thr Arg Ala Gly Cys Leu Ile Gly Ala Glu His Val
645 650 655
Asn Asn Ser Tyr Glu Cys Asp Ile Pro Ile Gly Ala Gly Ile Cys Ala
660 665 670
Ser Tyr Gln Thr Gln Thr Asn Ser Pro Arg Arg Ala Arg Ser Val Ala
675 680 685
Ser Gln Ser Ile Ile Ala Tyr Thr Met Ser Leu Gly Ala Glu Asn Ser
690 695 700
Val Ala Tyr Ser Asn Asn Ser Ile Ala Ile Pro Thr Asn Phe Thr Ile
705 710 715 720
Ser Val Thr Thr Glu Ile Leu Pro Val Ser Met Thr Lys Thr Ser Val
725 730 735
Asp Cys Thr Met Tyr Ile Cys Gly Asp Ser Thr Glu Cys Ser Asn Leu
740 745 750
Leu Leu Gln Tyr Gly Ser Phe Cys Thr Gln Leu Asn Arg Ala Leu Thr
755 760 765
Gly Ile Ala Val Glu Gln Asp Lys Asn Thr Gln Glu Val Phe Ala Gln
770 775 780
Val Lys Gln Ile Tyr Lys Thr Pro Pro Ile Lys Asp Phe Gly Gly Phe
785 790 795 800
Asn Phe Ser Gln Ile Leu Pro Asp Pro Ser Lys Pro Ser Lys Arg Ser
805 810 815
Phe Ile Glu Asp Leu Leu Phe Asn Lys Val Thr Leu Ala Asp Ala Gly
820 825 830
Phe Ile Lys Gln Tyr Gly Asp Cys Leu Gly Asp Ile Ala Ala Arg Asp
835 840 845
Leu Ile Cys Ala Gln Lys Phe Asn Gly Leu Thr Val Leu Pro Pro Leu
850 855 860
Leu Thr Asp Glu Met Ile Ala Gln Tyr Thr Ser Ala Leu Leu Ala Gly
865 870 875 880
Thr Ile Thr Ser Gly Trp Thr Phe Gly Ala Gly Ala Ala Leu Gln Ile
885 890 895
Pro Phe Ala Met Gln Met Ala Tyr Arg Phe Asn Gly Ile Gly Val Thr
900 905 910
Gln Asn Val Leu Tyr Glu Asn Gln Lys Leu Ile Ala Asn Gln Phe Asn
915 920 925
Ser Ala Ile Gly Lys Ile Gln Asp Ser Leu Ser Ser Thr Ala Ser Ala
930 935 940
Leu Gly Lys Leu Gln Asp Val Val Asn Gln Asn Ala Gln Ala Leu Asn
945 950 955 960
Thr Leu Val Lys Gln Leu Ser Ser Asn Phe Gly Ala Ile Ser Ser Val
965 970 975
Leu Asn Asp Ile Leu Ser Arg Leu Asp Lys Val Glu Ala Glu Val Gln
980 985 990
Ile Asp Arg Leu Ile Thr Gly Arg Leu Gln Ser Leu Gln Thr Tyr Val
995 1000 1005
Thr Gln Gln Leu Ile Arg Ala Ala Glu Ile Arg Ala Ser Ala Asn
1010 1015 1020
Leu Ala Ala Thr Lys Met Ser Glu Cys Val Leu Gly Gln Ser Lys
1025 1030 1035
Arg Val Asp Phe Cys Gly Lys Gly Tyr His Leu Met Ser Phe Pro
1040 1045 1050
Gln Ser Ala Pro His Gly Val Val Phe Leu His Val Thr Tyr Val
1055 1060 1065
Pro Ala Gln Glu Lys Asn Phe Thr Thr Ala Pro Ala Ile Cys His
1070 1075 1080
Asp Gly Lys Ala His Phe Pro Arg Glu Gly Val Phe Val Ser Asn
1085 1090 1095
Gly Thr His Trp Phe Val Thr Gln Arg Asn Phe Tyr Glu Pro Gln
1100 1105 1110
Ile Ile Thr Thr Asp Asn Thr Phe Val Ser Gly Asn Cys Asp Val
1115 1120 1125
Val Ile Gly Ile Val Asn Asn Thr Val Tyr Asp Pro Leu Gln Pro
1130 1135 1140
Glu Leu Asp Ser Phe Lys Glu Glu Leu Asp Lys Tyr Phe Lys Asn
1145 1150 1155
His Thr Ser Pro Asp Val Asp Leu Gly Asp Ile Ser Gly Ile Asn
1160 1165 1170
Ala Ser Val Val Asn Ile Gln Lys Glu Ile Asp Arg Leu Asn Glu
1175 1180 1185
Val Ala Lys Asn Leu Asn Glu Ser Leu Ile Asp Leu Gln Glu Leu
1190 1195 1200
Gly Lys Tyr Glu Gln Tyr Ile Lys Trp Pro Trp Tyr Ile Trp Leu
1205 1210 1215
Gly Phe Ile Ala Gly Leu Ile Ala Ile Val Met Val Thr Ile Met
1220 1225 1230
Leu Cys Cys Met Thr Ser Cys Cys Ser Cys Leu Lys Gly Cys Cys
1235 1240 1245
Ser Cys Gly Ser Cys Cys Lys Phe Asp Glu Asp Asp Ser Glu Pro
1250 1255 1260
Val Leu Lys Gly Val Lys Leu His Tyr Thr
1265 1270
<210> 4
<211> 1248
<212> PRT
<213> artificial
<220>
<223> D614G+Δfurin的插入片段
<400> 4
Met Phe Val Phe Leu Val Leu Leu Pro Leu Val Ser Ser Gln Cys Val
1 5 10 15
Asn Leu Thr Thr Arg Thr Gln Leu Pro Pro Ala Tyr Thr Asn Ser Phe
20 25 30
Thr Arg Gly Val Tyr Tyr Pro Asp Lys Val Phe Arg Ser Ser Val Leu
35 40 45
His Ser Thr Gln Asp Leu Phe Leu Pro Phe Phe Ser Asn Val Thr Trp
50 55 60
Phe His Ala Ile His Val Ser Gly Thr Asn Gly Thr Lys Arg Phe Asp
65 70 75 80
Asn Pro Val Leu Pro Phe Asn Asp Gly Val Tyr Phe Ala Ser Thr Glu
85 90 95
Lys Ser Asn Ile Ile Arg Gly Trp Ile Phe Gly Thr Thr Leu Asp Ser
100 105 110
Lys Thr Gln Ser Leu Leu Ile Val Asn Asn Ala Thr Asn Val Val Ile
115 120 125
Lys Val Cys Glu Phe Gln Phe Cys Asn Asp Pro Phe Leu Gly Val Tyr
130 135 140
Tyr His Lys Asn Asn Lys Ser Trp Met Glu Ser Glu Phe Arg Val Tyr
145 150 155 160
Ser Ser Ala Asn Asn Cys Thr Phe Glu Tyr Val Ser Gln Pro Phe Leu
165 170 175
Met Asp Leu Glu Gly Lys Gln Gly Asn Phe Lys Asn Leu Arg Glu Phe
180 185 190
Val Phe Lys Asn Ile Asp Gly Tyr Phe Lys Ile Tyr Ser Lys His Thr
195 200 205
Pro Ile Asn Leu Val Arg Asp Leu Pro Gln Gly Phe Ser Ala Leu Glu
210 215 220
Pro Leu Val Asp Leu Pro Ile Gly Ile Asn Ile Thr Arg Phe Gln Thr
225 230 235 240
Leu Leu Ala Leu His Arg Ser Tyr Leu Thr Pro Gly Asp Ser Ser Ser
245 250 255
Gly Trp Thr Ala Gly Ala Ala Ala Tyr Tyr Val Gly Tyr Leu Gln Pro
260 265 270
Arg Thr Phe Leu Leu Lys Tyr Asn Glu Asn Gly Thr Ile Thr Asp Ala
275 280 285
Val Asp Cys Ala Leu Asp Pro Leu Ser Glu Thr Lys Cys Thr Leu Lys
290 295 300
Ser Phe Thr Val Glu Lys Gly Ile Tyr Gln Thr Ser Asn Phe Arg Val
305 310 315 320
Gln Pro Thr Glu Ser Ile Val Arg Phe Pro Asn Ile Thr Asn Leu Cys
325 330 335
Pro Phe Gly Glu Val Phe Asn Ala Thr Arg Phe Ala Ser Val Tyr Ala
340 345 350
Trp Asn Arg Lys Arg Ile Ser Asn Cys Val Ala Asp Tyr Ser Val Leu
355 360 365
Tyr Asn Ser Ala Ser Phe Ser Thr Phe Lys Cys Tyr Gly Val Ser Pro
370 375 380
Thr Lys Leu Asn Asp Leu Cys Phe Thr Asn Val Tyr Ala Asp Ser Phe
385 390 395 400
Val Ile Arg Gly Asp Glu Val Arg Gln Ile Ala Pro Gly Gln Thr Gly
405 410 415
Lys Ile Ala Asp Tyr Asn Tyr Lys Leu Pro Asp Asp Phe Thr Gly Cys
420 425 430
Val Ile Ala Trp Asn Ser Asn Asn Leu Asp Ser Lys Val Gly Gly Asn
435 440 445
Tyr Asn Tyr Leu Tyr Arg Leu Phe Arg Lys Ser Asn Leu Lys Pro Phe
450 455 460
Glu Arg Asp Ile Ser Thr Glu Ile Tyr Gln Ala Gly Ser Thr Pro Cys
465 470 475 480
Asn Gly Val Glu Gly Phe Asn Cys Tyr Phe Pro Leu Gln Ser Tyr Gly
485 490 495
Phe Gln Pro Thr Asn Gly Val Gly Tyr Gln Pro Tyr Arg Val Val Val
500 505 510
Leu Ser Phe Glu Leu Leu His Ala Pro Ala Thr Val Cys Gly Pro Lys
515 520 525
Lys Ser Thr Asn Leu Val Lys Asn Lys Cys Val Asn Phe Asn Phe Asn
530 535 540
Gly Leu Thr Gly Thr Gly Val Leu Thr Glu Ser Asn Lys Lys Phe Leu
545 550 555 560
Pro Phe Gln Gln Phe Gly Arg Asp Ile Ala Asp Thr Thr Asp Ala Val
565 570 575
Arg Asp Pro Gln Thr Leu Glu Ile Leu Asp Ile Thr Pro Cys Ser Phe
580 585 590
Gly Gly Val Ser Val Ile Thr Pro Gly Thr Asn Thr Ser Asn Gln Val
595 600 605
Ala Val Leu Tyr Gln Gly Val Asn Cys Thr Glu Val Pro Val Ala Ile
610 615 620
His Ala Asp Gln Leu Thr Pro Thr Trp Arg Val Tyr Ser Thr Gly Ser
625 630 635 640
Asn Val Phe Gln Thr Arg Ala Gly Cys Leu Ile Gly Ala Glu His Val
645 650 655
Asn Asn Ser Tyr Glu Cys Asp Ile Pro Ile Gly Ala Gly Ile Cys Ala
660 665 670
Ser Tyr Gln Thr Gln Thr Asn Ser Arg Ser Val Ala Ser Gln Ser Ile
675 680 685
Ile Ala Tyr Thr Met Ser Leu Gly Ala Glu Asn Ser Val Ala Tyr Ser
690 695 700
Asn Asn Ser Ile Ala Ile Pro Thr Asn Phe Thr Ile Ser Val Thr Thr
705 710 715 720
Glu Ile Leu Pro Val Ser Met Thr Lys Thr Ser Val Asp Cys Thr Met
725 730 735
Tyr Ile Cys Gly Asp Ser Thr Glu Cys Ser Asn Leu Leu Leu Gln Tyr
740 745 750
Gly Ser Phe Cys Thr Gln Leu Asn Arg Ala Leu Thr Gly Ile Ala Val
755 760 765
Glu Gln Asp Lys Asn Thr Gln Glu Val Phe Ala Gln Val Lys Gln Ile
770 775 780
Tyr Lys Thr Pro Pro Ile Lys Asp Phe Gly Gly Phe Asn Phe Ser Gln
785 790 795 800
Ile Leu Pro Asp Pro Ser Lys Pro Ser Lys Arg Ser Phe Ile Glu Asp
805 810 815
Leu Leu Phe Asn Lys Val Thr Leu Ala Asp Ala Gly Phe Ile Lys Gln
820 825 830
Tyr Gly Asp Cys Leu Gly Asp Ile Ala Ala Arg Asp Leu Ile Cys Ala
835 840 845
Gln Lys Phe Asn Gly Leu Thr Val Leu Pro Pro Leu Leu Thr Asp Glu
850 855 860
Met Ile Ala Gln Tyr Thr Ser Ala Leu Leu Ala Gly Thr Ile Thr Ser
865 870 875 880
Gly Trp Thr Phe Gly Ala Gly Ala Ala Leu Gln Ile Pro Phe Ala Met
885 890 895
Gln Met Ala Tyr Arg Phe Asn Gly Ile Gly Val Thr Gln Asn Val Leu
900 905 910
Tyr Glu Asn Gln Lys Leu Ile Ala Asn Gln Phe Asn Ser Ala Ile Gly
915 920 925
Lys Ile Gln Asp Ser Leu Ser Ser Thr Ala Ser Ala Leu Gly Lys Leu
930 935 940
Gln Asp Val Val Asn Gln Asn Ala Gln Ala Leu Asn Thr Leu Val Lys
945 950 955 960
Gln Leu Ser Ser Asn Phe Gly Ala Ile Ser Ser Val Leu Asn Asp Ile
965 970 975
Leu Ser Arg Leu Asp Lys Val Glu Ala Glu Val Gln Ile Asp Arg Leu
980 985 990
Ile Thr Gly Arg Leu Gln Ser Leu Gln Thr Tyr Val Thr Gln Gln Leu
995 1000 1005
Ile Arg Ala Ala Glu Ile Arg Ala Ser Ala Asn Leu Ala Ala Thr
1010 1015 1020
Lys Met Ser Glu Cys Val Leu Gly Gln Ser Lys Arg Val Asp Phe
1025 1030 1035
Cys Gly Lys Gly Tyr His Leu Met Ser Phe Pro Gln Ser Ala Pro
1040 1045 1050
His Gly Val Val Phe Leu His Val Thr Tyr Val Pro Ala Gln Glu
1055 1060 1065
Lys Asn Phe Thr Thr Ala Pro Ala Ile Cys His Asp Gly Lys Ala
1070 1075 1080
His Phe Pro Arg Glu Gly Val Phe Val Ser Asn Gly Thr His Trp
1085 1090 1095
Phe Val Thr Gln Arg Asn Phe Tyr Glu Pro Gln Ile Ile Thr Thr
1100 1105 1110
Asp Asn Thr Phe Val Ser Gly Asn Cys Asp Val Val Ile Gly Ile
1115 1120 1125
Val Asn Asn Thr Val Tyr Asp Pro Leu Gln Pro Glu Leu Asp Ser
1130 1135 1140
Phe Lys Glu Glu Leu Asp Lys Tyr Phe Lys Asn His Thr Ser Pro
1145 1150 1155
Asp Val Asp Leu Gly Asp Ile Ser Gly Ile Asn Ala Ser Val Val
1160 1165 1170
Asn Ile Gln Lys Glu Ile Asp Arg Leu Asn Glu Val Ala Lys Asn
1175 1180 1185
Leu Asn Glu Ser Leu Ile Asp Leu Gln Glu Leu Gly Lys Tyr Glu
1190 1195 1200
Gln Tyr Ile Lys Trp Pro Trp Tyr Ile Trp Leu Gly Phe Ile Ala
1205 1210 1215
Gly Leu Ile Ala Ile Val Met Val Thr Ile Met Leu Cys Cys Met
1220 1225 1230
Thr Ser Cys Cys Ser Cys Leu Lys Gly Cys Cys Ser Cys Gly Ser
1235 1240 1245
<210> 5
<211> 1273
<212> PRT
<213> artificial
<220>
<223> D614G+ K417N的插入片段
<400> 5
Met Phe Val Phe Leu Val Leu Leu Pro Leu Val Ser Ser Gln Cys Val
1 5 10 15
Asn Leu Thr Thr Arg Thr Gln Leu Pro Pro Ala Tyr Thr Asn Ser Phe
20 25 30
Thr Arg Gly Val Tyr Tyr Pro Asp Lys Val Phe Arg Ser Ser Val Leu
35 40 45
His Ser Thr Gln Asp Leu Phe Leu Pro Phe Phe Ser Asn Val Thr Trp
50 55 60
Phe His Ala Ile His Val Ser Gly Thr Asn Gly Thr Lys Arg Phe Asp
65 70 75 80
Asn Pro Val Leu Pro Phe Asn Asp Gly Val Tyr Phe Ala Ser Thr Glu
85 90 95
Lys Ser Asn Ile Ile Arg Gly Trp Ile Phe Gly Thr Thr Leu Asp Ser
100 105 110
Lys Thr Gln Ser Leu Leu Ile Val Asn Asn Ala Thr Asn Val Val Ile
115 120 125
Lys Val Cys Glu Phe Gln Phe Cys Asn Asp Pro Phe Leu Gly Val Tyr
130 135 140
Tyr His Lys Asn Asn Lys Ser Trp Met Glu Ser Glu Phe Arg Val Tyr
145 150 155 160
Ser Ser Ala Asn Asn Cys Thr Phe Glu Tyr Val Ser Gln Pro Phe Leu
165 170 175
Met Asp Leu Glu Gly Lys Gln Gly Asn Phe Lys Asn Leu Arg Glu Phe
180 185 190
Val Phe Lys Asn Ile Asp Gly Tyr Phe Lys Ile Tyr Ser Lys His Thr
195 200 205
Pro Ile Asn Leu Val Arg Asp Leu Pro Gln Gly Phe Ser Ala Leu Glu
210 215 220
Pro Leu Val Asp Leu Pro Ile Gly Ile Asn Ile Thr Arg Phe Gln Thr
225 230 235 240
Leu Leu Ala Leu His Arg Ser Tyr Leu Thr Pro Gly Asp Ser Ser Ser
245 250 255
Gly Trp Thr Ala Gly Ala Ala Ala Tyr Tyr Val Gly Tyr Leu Gln Pro
260 265 270
Arg Thr Phe Leu Leu Lys Tyr Asn Glu Asn Gly Thr Ile Thr Asp Ala
275 280 285
Val Asp Cys Ala Leu Asp Pro Leu Ser Glu Thr Lys Cys Thr Leu Lys
290 295 300
Ser Phe Thr Val Glu Lys Gly Ile Tyr Gln Thr Ser Asn Phe Arg Val
305 310 315 320
Gln Pro Thr Glu Ser Ile Val Arg Phe Pro Asn Ile Thr Asn Leu Cys
325 330 335
Pro Phe Gly Glu Val Phe Asn Ala Thr Arg Phe Ala Ser Val Tyr Ala
340 345 350
Trp Asn Arg Lys Arg Ile Ser Asn Cys Val Ala Asp Tyr Ser Val Leu
355 360 365
Tyr Asn Ser Ala Ser Phe Ser Thr Phe Lys Cys Tyr Gly Val Ser Pro
370 375 380
Thr Lys Leu Asn Asp Leu Cys Phe Thr Asn Val Tyr Ala Asp Ser Phe
385 390 395 400
Val Ile Arg Gly Asp Glu Val Arg Gln Ile Ala Pro Gly Gln Thr Gly
405 410 415
Asn Ile Ala Asp Tyr Asn Tyr Lys Leu Pro Asp Asp Phe Thr Gly Cys
420 425 430
Val Ile Ala Trp Asn Ser Asn Asn Leu Asp Ser Lys Val Gly Gly Asn
435 440 445
Tyr Asn Tyr Leu Tyr Arg Leu Phe Arg Lys Ser Asn Leu Lys Pro Phe
450 455 460
Glu Arg Asp Ile Ser Thr Glu Ile Tyr Gln Ala Gly Ser Thr Pro Cys
465 470 475 480
Asn Gly Val Glu Gly Phe Asn Cys Tyr Phe Pro Leu Gln Ser Tyr Gly
485 490 495
Phe Gln Pro Thr Asn Gly Val Gly Tyr Gln Pro Tyr Arg Val Val Val
500 505 510
Leu Ser Phe Glu Leu Leu His Ala Pro Ala Thr Val Cys Gly Pro Lys
515 520 525
Lys Ser Thr Asn Leu Val Lys Asn Lys Cys Val Asn Phe Asn Phe Asn
530 535 540
Gly Leu Thr Gly Thr Gly Val Leu Thr Glu Ser Asn Lys Lys Phe Leu
545 550 555 560
Pro Phe Gln Gln Phe Gly Arg Asp Ile Ala Asp Thr Thr Asp Ala Val
565 570 575
Arg Asp Pro Gln Thr Leu Glu Ile Leu Asp Ile Thr Pro Cys Ser Phe
580 585 590
Gly Gly Val Ser Val Ile Thr Pro Gly Thr Asn Thr Ser Asn Gln Val
595 600 605
Ala Val Leu Tyr Gln Gly Val Asn Cys Thr Glu Val Pro Val Ala Ile
610 615 620
His Ala Asp Gln Leu Thr Pro Thr Trp Arg Val Tyr Ser Thr Gly Ser
625 630 635 640
Asn Val Phe Gln Thr Arg Ala Gly Cys Leu Ile Gly Ala Glu His Val
645 650 655
Asn Asn Ser Tyr Glu Cys Asp Ile Pro Ile Gly Ala Gly Ile Cys Ala
660 665 670
Ser Tyr Gln Thr Gln Thr Asn Ser Pro Arg Arg Ala Arg Ser Val Ala
675 680 685
Ser Gln Ser Ile Ile Ala Tyr Thr Met Ser Leu Gly Ala Glu Asn Ser
690 695 700
Val Ala Tyr Ser Asn Asn Ser Ile Ala Ile Pro Thr Asn Phe Thr Ile
705 710 715 720
Ser Val Thr Thr Glu Ile Leu Pro Val Ser Met Thr Lys Thr Ser Val
725 730 735
Asp Cys Thr Met Tyr Ile Cys Gly Asp Ser Thr Glu Cys Ser Asn Leu
740 745 750
Leu Leu Gln Tyr Gly Ser Phe Cys Thr Gln Leu Asn Arg Ala Leu Thr
755 760 765
Gly Ile Ala Val Glu Gln Asp Lys Asn Thr Gln Glu Val Phe Ala Gln
770 775 780
Val Lys Gln Ile Tyr Lys Thr Pro Pro Ile Lys Asp Phe Gly Gly Phe
785 790 795 800
Asn Phe Ser Gln Ile Leu Pro Asp Pro Ser Lys Pro Ser Lys Arg Ser
805 810 815
Phe Ile Glu Asp Leu Leu Phe Asn Lys Val Thr Leu Ala Asp Ala Gly
820 825 830
Phe Ile Lys Gln Tyr Gly Asp Cys Leu Gly Asp Ile Ala Ala Arg Asp
835 840 845
Leu Ile Cys Ala Gln Lys Phe Asn Gly Leu Thr Val Leu Pro Pro Leu
850 855 860
Leu Thr Asp Glu Met Ile Ala Gln Tyr Thr Ser Ala Leu Leu Ala Gly
865 870 875 880
Thr Ile Thr Ser Gly Trp Thr Phe Gly Ala Gly Ala Ala Leu Gln Ile
885 890 895
Pro Phe Ala Met Gln Met Ala Tyr Arg Phe Asn Gly Ile Gly Val Thr
900 905 910
Gln Asn Val Leu Tyr Glu Asn Gln Lys Leu Ile Ala Asn Gln Phe Asn
915 920 925
Ser Ala Ile Gly Lys Ile Gln Asp Ser Leu Ser Ser Thr Ala Ser Ala
930 935 940
Leu Gly Lys Leu Gln Asp Val Val Asn Gln Asn Ala Gln Ala Leu Asn
945 950 955 960
Thr Leu Val Lys Gln Leu Ser Ser Asn Phe Gly Ala Ile Ser Ser Val
965 970 975
Leu Asn Asp Ile Leu Ser Arg Leu Asp Lys Val Glu Ala Glu Val Gln
980 985 990
Ile Asp Arg Leu Ile Thr Gly Arg Leu Gln Ser Leu Gln Thr Tyr Val
995 1000 1005
Thr Gln Gln Leu Ile Arg Ala Ala Glu Ile Arg Ala Ser Ala Asn
1010 1015 1020
Leu Ala Ala Thr Lys Met Ser Glu Cys Val Leu Gly Gln Ser Lys
1025 1030 1035
Arg Val Asp Phe Cys Gly Lys Gly Tyr His Leu Met Ser Phe Pro
1040 1045 1050
Gln Ser Ala Pro His Gly Val Val Phe Leu His Val Thr Tyr Val
1055 1060 1065
Pro Ala Gln Glu Lys Asn Phe Thr Thr Ala Pro Ala Ile Cys His
1070 1075 1080
Asp Gly Lys Ala His Phe Pro Arg Glu Gly Val Phe Val Ser Asn
1085 1090 1095
Gly Thr His Trp Phe Val Thr Gln Arg Asn Phe Tyr Glu Pro Gln
1100 1105 1110
Ile Ile Thr Thr Asp Asn Thr Phe Val Ser Gly Asn Cys Asp Val
1115 1120 1125
Val Ile Gly Ile Val Asn Asn Thr Val Tyr Asp Pro Leu Gln Pro
1130 1135 1140
Glu Leu Asp Ser Phe Lys Glu Glu Leu Asp Lys Tyr Phe Lys Asn
1145 1150 1155
His Thr Ser Pro Asp Val Asp Leu Gly Asp Ile Ser Gly Ile Asn
1160 1165 1170
Ala Ser Val Val Asn Ile Gln Lys Glu Ile Asp Arg Leu Asn Glu
1175 1180 1185
Val Ala Lys Asn Leu Asn Glu Ser Leu Ile Asp Leu Gln Glu Leu
1190 1195 1200
Gly Lys Tyr Glu Gln Tyr Ile Lys Trp Pro Trp Tyr Ile Trp Leu
1205 1210 1215
Gly Phe Ile Ala Gly Leu Ile Ala Ile Val Met Val Thr Ile Met
1220 1225 1230
Leu Cys Cys Met Thr Ser Cys Cys Ser Cys Leu Lys Gly Cys Cys
1235 1240 1245
Ser Cys Gly Ser Cys Cys Lys Phe Asp Glu Asp Asp Ser Glu Pro
1250 1255 1260
Val Leu Lys Gly Val Lys Leu His Tyr Thr
1265 1270
<210> 6
<211> 1273
<212> PRT
<213> artificial
<220>
<223> D614G+Q613H的插入片段
<400> 6
Met Phe Val Phe Leu Val Leu Leu Pro Leu Val Ser Ser Gln Cys Val
1 5 10 15
Asn Leu Thr Thr Arg Thr Gln Leu Pro Pro Ala Tyr Thr Asn Ser Phe
20 25 30
Thr Arg Gly Val Tyr Tyr Pro Asp Lys Val Phe Arg Ser Ser Val Leu
35 40 45
His Ser Thr Gln Asp Leu Phe Leu Pro Phe Phe Ser Asn Val Thr Trp
50 55 60
Phe His Ala Ile His Val Ser Gly Thr Asn Gly Thr Lys Arg Phe Asp
65 70 75 80
Asn Pro Val Leu Pro Phe Asn Asp Gly Val Tyr Phe Ala Ser Thr Glu
85 90 95
Lys Ser Asn Ile Ile Arg Gly Trp Ile Phe Gly Thr Thr Leu Asp Ser
100 105 110
Lys Thr Gln Ser Leu Leu Ile Val Asn Asn Ala Thr Asn Val Val Ile
115 120 125
Lys Val Cys Glu Phe Gln Phe Cys Asn Asp Pro Phe Leu Gly Val Tyr
130 135 140
Tyr His Lys Asn Asn Lys Ser Trp Met Glu Ser Glu Phe Arg Val Tyr
145 150 155 160
Ser Ser Ala Asn Asn Cys Thr Phe Glu Tyr Val Ser Gln Pro Phe Leu
165 170 175
Met Asp Leu Glu Gly Lys Gln Gly Asn Phe Lys Asn Leu Arg Glu Phe
180 185 190
Val Phe Lys Asn Ile Asp Gly Tyr Phe Lys Ile Tyr Ser Lys His Thr
195 200 205
Pro Ile Asn Leu Val Arg Asp Leu Pro Gln Gly Phe Ser Ala Leu Glu
210 215 220
Pro Leu Val Asp Leu Pro Ile Gly Ile Asn Ile Thr Arg Phe Gln Thr
225 230 235 240
Leu Leu Ala Leu His Arg Ser Tyr Leu Thr Pro Gly Asp Ser Ser Ser
245 250 255
Gly Trp Thr Ala Gly Ala Ala Ala Tyr Tyr Val Gly Tyr Leu Gln Pro
260 265 270
Arg Thr Phe Leu Leu Lys Tyr Asn Glu Asn Gly Thr Ile Thr Asp Ala
275 280 285
Val Asp Cys Ala Leu Asp Pro Leu Ser Glu Thr Lys Cys Thr Leu Lys
290 295 300
Ser Phe Thr Val Glu Lys Gly Ile Tyr Gln Thr Ser Asn Phe Arg Val
305 310 315 320
Gln Pro Thr Glu Ser Ile Val Arg Phe Pro Asn Ile Thr Asn Leu Cys
325 330 335
Pro Phe Gly Glu Val Phe Asn Ala Thr Arg Phe Ala Ser Val Tyr Ala
340 345 350
Trp Asn Arg Lys Arg Ile Ser Asn Cys Val Ala Asp Tyr Ser Val Leu
355 360 365
Tyr Asn Ser Ala Ser Phe Ser Thr Phe Lys Cys Tyr Gly Val Ser Pro
370 375 380
Thr Lys Leu Asn Asp Leu Cys Phe Thr Asn Val Tyr Ala Asp Ser Phe
385 390 395 400
Val Ile Arg Gly Asp Glu Val Arg Gln Ile Ala Pro Gly Gln Thr Gly
405 410 415
Lys Ile Ala Asp Tyr Asn Tyr Lys Leu Pro Asp Asp Phe Thr Gly Cys
420 425 430
Val Ile Ala Trp Asn Ser Asn Asn Leu Asp Ser Lys Val Gly Gly Asn
435 440 445
Tyr Asn Tyr Leu Tyr Arg Leu Phe Arg Lys Ser Asn Leu Lys Pro Phe
450 455 460
Glu Arg Asp Ile Ser Thr Glu Ile Tyr Gln Ala Gly Ser Thr Pro Cys
465 470 475 480
Asn Gly Val Glu Gly Phe Asn Cys Tyr Phe Pro Leu Gln Ser Tyr Gly
485 490 495
Phe Gln Pro Thr Asn Gly Val Gly Tyr Gln Pro Tyr Arg Val Val Val
500 505 510
Leu Ser Phe Glu Leu Leu His Ala Pro Ala Thr Val Cys Gly Pro Lys
515 520 525
Lys Ser Thr Asn Leu Val Lys Asn Lys Cys Val Asn Phe Asn Phe Asn
530 535 540
Gly Leu Thr Gly Thr Gly Val Leu Thr Glu Ser Asn Lys Lys Phe Leu
545 550 555 560
Pro Phe Gln Gln Phe Gly Arg Asp Ile Ala Asp Thr Thr Asp Ala Val
565 570 575
Arg Asp Pro Gln Thr Leu Glu Ile Leu Asp Ile Thr Pro Cys Ser Phe
580 585 590
Gly Gly Val Ser Val Ile Thr Pro Gly Thr Asn Thr Ser Asn Gln Val
595 600 605
Ala Val Leu Tyr His Gly Val Asn Cys Thr Glu Val Pro Val Ala Ile
610 615 620
His Ala Asp Gln Leu Thr Pro Thr Trp Arg Val Tyr Ser Thr Gly Ser
625 630 635 640
Asn Val Phe Gln Thr Arg Ala Gly Cys Leu Ile Gly Ala Glu His Val
645 650 655
Asn Asn Ser Tyr Glu Cys Asp Ile Pro Ile Gly Ala Gly Ile Cys Ala
660 665 670
Ser Tyr Gln Thr Gln Thr Asn Ser Pro Arg Arg Ala Arg Ser Val Ala
675 680 685
Ser Gln Ser Ile Ile Ala Tyr Thr Met Ser Leu Gly Ala Glu Asn Ser
690 695 700
Val Ala Tyr Ser Asn Asn Ser Ile Ala Ile Pro Thr Asn Phe Thr Ile
705 710 715 720
Ser Val Thr Thr Glu Ile Leu Pro Val Ser Met Thr Lys Thr Ser Val
725 730 735
Asp Cys Thr Met Tyr Ile Cys Gly Asp Ser Thr Glu Cys Ser Asn Leu
740 745 750
Leu Leu Gln Tyr Gly Ser Phe Cys Thr Gln Leu Asn Arg Ala Leu Thr
755 760 765
Gly Ile Ala Val Glu Gln Asp Lys Asn Thr Gln Glu Val Phe Ala Gln
770 775 780
Val Lys Gln Ile Tyr Lys Thr Pro Pro Ile Lys Asp Phe Gly Gly Phe
785 790 795 800
Asn Phe Ser Gln Ile Leu Pro Asp Pro Ser Lys Pro Ser Lys Arg Ser
805 810 815
Phe Ile Glu Asp Leu Leu Phe Asn Lys Val Thr Leu Ala Asp Ala Gly
820 825 830
Phe Ile Lys Gln Tyr Gly Asp Cys Leu Gly Asp Ile Ala Ala Arg Asp
835 840 845
Leu Ile Cys Ala Gln Lys Phe Asn Gly Leu Thr Val Leu Pro Pro Leu
850 855 860
Leu Thr Asp Glu Met Ile Ala Gln Tyr Thr Ser Ala Leu Leu Ala Gly
865 870 875 880
Thr Ile Thr Ser Gly Trp Thr Phe Gly Ala Gly Ala Ala Leu Gln Ile
885 890 895
Pro Phe Ala Met Gln Met Ala Tyr Arg Phe Asn Gly Ile Gly Val Thr
900 905 910
Gln Asn Val Leu Tyr Glu Asn Gln Lys Leu Ile Ala Asn Gln Phe Asn
915 920 925
Ser Ala Ile Gly Lys Ile Gln Asp Ser Leu Ser Ser Thr Ala Ser Ala
930 935 940
Leu Gly Lys Leu Gln Asp Val Val Asn Gln Asn Ala Gln Ala Leu Asn
945 950 955 960
Thr Leu Val Lys Gln Leu Ser Ser Asn Phe Gly Ala Ile Ser Ser Val
965 970 975
Leu Asn Asp Ile Leu Ser Arg Leu Asp Lys Val Glu Ala Glu Val Gln
980 985 990
Ile Asp Arg Leu Ile Thr Gly Arg Leu Gln Ser Leu Gln Thr Tyr Val
995 1000 1005
Thr Gln Gln Leu Ile Arg Ala Ala Glu Ile Arg Ala Ser Ala Asn
1010 1015 1020
Leu Ala Ala Thr Lys Met Ser Glu Cys Val Leu Gly Gln Ser Lys
1025 1030 1035
Arg Val Asp Phe Cys Gly Lys Gly Tyr His Leu Met Ser Phe Pro
1040 1045 1050
Gln Ser Ala Pro His Gly Val Val Phe Leu His Val Thr Tyr Val
1055 1060 1065
Pro Ala Gln Glu Lys Asn Phe Thr Thr Ala Pro Ala Ile Cys His
1070 1075 1080
Asp Gly Lys Ala His Phe Pro Arg Glu Gly Val Phe Val Ser Asn
1085 1090 1095
Gly Thr His Trp Phe Val Thr Gln Arg Asn Phe Tyr Glu Pro Gln
1100 1105 1110
Ile Ile Thr Thr Asp Asn Thr Phe Val Ser Gly Asn Cys Asp Val
1115 1120 1125
Val Ile Gly Ile Val Asn Asn Thr Val Tyr Asp Pro Leu Gln Pro
1130 1135 1140
Glu Leu Asp Ser Phe Lys Glu Glu Leu Asp Lys Tyr Phe Lys Asn
1145 1150 1155
His Thr Ser Pro Asp Val Asp Leu Gly Asp Ile Ser Gly Ile Asn
1160 1165 1170
Ala Ser Val Val Asn Ile Gln Lys Glu Ile Asp Arg Leu Asn Glu
1175 1180 1185
Val Ala Lys Asn Leu Asn Glu Ser Leu Ile Asp Leu Gln Glu Leu
1190 1195 1200
Gly Lys Tyr Glu Gln Tyr Ile Lys Trp Pro Trp Tyr Ile Trp Leu
1205 1210 1215
Gly Phe Ile Ala Gly Leu Ile Ala Ile Val Met Val Thr Ile Met
1220 1225 1230
Leu Cys Cys Met Thr Ser Cys Cys Ser Cys Leu Lys Gly Cys Cys
1235 1240 1245
Ser Cys Gly Ser Cys Cys Lys Phe Asp Glu Asp Asp Ser Glu Pro
1250 1255 1260
Val Leu Lys Gly Val Lys Leu His Tyr Thr
1265 1270
<210> 7
<211> 1273
<212> PRT
<213> artificial
<220>
<223> D614G+N709H的插入片段
<400> 7
Met Phe Val Phe Leu Val Leu Leu Pro Leu Val Ser Ser Gln Cys Val
1 5 10 15
Asn Leu Thr Thr Arg Thr Gln Leu Pro Pro Ala Tyr Thr Asn Ser Phe
20 25 30
Thr Arg Gly Val Tyr Tyr Pro Asp Lys Val Phe Arg Ser Ser Val Leu
35 40 45
His Ser Thr Gln Asp Leu Phe Leu Pro Phe Phe Ser Asn Val Thr Trp
50 55 60
Phe His Ala Ile His Val Ser Gly Thr Asn Gly Thr Lys Arg Phe Asp
65 70 75 80
Asn Pro Val Leu Pro Phe Asn Asp Gly Val Tyr Phe Ala Ser Thr Glu
85 90 95
Lys Ser Asn Ile Ile Arg Gly Trp Ile Phe Gly Thr Thr Leu Asp Ser
100 105 110
Lys Thr Gln Ser Leu Leu Ile Val Asn Asn Ala Thr Asn Val Val Ile
115 120 125
Lys Val Cys Glu Phe Gln Phe Cys Asn Asp Pro Phe Leu Gly Val Tyr
130 135 140
Tyr His Lys Asn Asn Lys Ser Trp Met Glu Ser Glu Phe Arg Val Tyr
145 150 155 160
Ser Ser Ala Asn Asn Cys Thr Phe Glu Tyr Val Ser Gln Pro Phe Leu
165 170 175
Met Asp Leu Glu Gly Lys Gln Gly Asn Phe Lys Asn Leu Arg Glu Phe
180 185 190
Val Phe Lys Asn Ile Asp Gly Tyr Phe Lys Ile Tyr Ser Lys His Thr
195 200 205
Pro Ile Asn Leu Val Arg Asp Leu Pro Gln Gly Phe Ser Ala Leu Glu
210 215 220
Pro Leu Val Asp Leu Pro Ile Gly Ile Asn Ile Thr Arg Phe Gln Thr
225 230 235 240
Leu Leu Ala Leu His Arg Ser Tyr Leu Thr Pro Gly Asp Ser Ser Ser
245 250 255
Gly Trp Thr Ala Gly Ala Ala Ala Tyr Tyr Val Gly Tyr Leu Gln Pro
260 265 270
Arg Thr Phe Leu Leu Lys Tyr Asn Glu Asn Gly Thr Ile Thr Asp Ala
275 280 285
Val Asp Cys Ala Leu Asp Pro Leu Ser Glu Thr Lys Cys Thr Leu Lys
290 295 300
Ser Phe Thr Val Glu Lys Gly Ile Tyr Gln Thr Ser Asn Phe Arg Val
305 310 315 320
Gln Pro Thr Glu Ser Ile Val Arg Phe Pro Asn Ile Thr Asn Leu Cys
325 330 335
Pro Phe Gly Glu Val Phe Asn Ala Thr Arg Phe Ala Ser Val Tyr Ala
340 345 350
Trp Asn Arg Lys Arg Ile Ser Asn Cys Val Ala Asp Tyr Ser Val Leu
355 360 365
Tyr Asn Ser Ala Ser Phe Ser Thr Phe Lys Cys Tyr Gly Val Ser Pro
370 375 380
Thr Lys Leu Asn Asp Leu Cys Phe Thr Asn Val Tyr Ala Asp Ser Phe
385 390 395 400
Val Ile Arg Gly Asp Glu Val Arg Gln Ile Ala Pro Gly Gln Thr Gly
405 410 415
Lys Ile Ala Asp Tyr Asn Tyr Lys Leu Pro Asp Asp Phe Thr Gly Cys
420 425 430
Val Ile Ala Trp Asn Ser Asn Asn Leu Asp Ser Lys Val Gly Gly Asn
435 440 445
Tyr Asn Tyr Leu Tyr Arg Leu Phe Arg Lys Ser Asn Leu Lys Pro Phe
450 455 460
Glu Arg Asp Ile Ser Thr Glu Ile Tyr Gln Ala Gly Ser Thr Pro Cys
465 470 475 480
Asn Gly Val Glu Gly Phe Asn Cys Tyr Phe Pro Leu Gln Ser Tyr Gly
485 490 495
Phe Gln Pro Thr Asn Gly Val Gly Tyr Gln Pro Tyr Arg Val Val Val
500 505 510
Leu Ser Phe Glu Leu Leu His Ala Pro Ala Thr Val Cys Gly Pro Lys
515 520 525
Lys Ser Thr Asn Leu Val Lys Asn Lys Cys Val Asn Phe Asn Phe Asn
530 535 540
Gly Leu Thr Gly Thr Gly Val Leu Thr Glu Ser Asn Lys Lys Phe Leu
545 550 555 560
Pro Phe Gln Gln Phe Gly Arg Asp Ile Ala Asp Thr Thr Asp Ala Val
565 570 575
Arg Asp Pro Gln Thr Leu Glu Ile Leu Asp Ile Thr Pro Cys Ser Phe
580 585 590
Gly Gly Val Ser Val Ile Thr Pro Gly Thr Asn Thr Ser Asn Gln Val
595 600 605
Ala Val Leu Tyr Gln Gly Val Asn Cys Thr Glu Val Pro Val Ala Ile
610 615 620
His Ala Asp Gln Leu Thr Pro Thr Trp Arg Val Tyr Ser Thr Gly Ser
625 630 635 640
Asn Val Phe Gln Thr Arg Ala Gly Cys Leu Ile Gly Ala Glu His Val
645 650 655
Asn Asn Ser Tyr Glu Cys Asp Ile Pro Ile Gly Ala Gly Ile Cys Ala
660 665 670
Ser Tyr Gln Thr Gln Thr Asn Ser Pro Arg Arg Ala Arg Ser Val Ala
675 680 685
Ser Gln Ser Ile Ile Ala Tyr Thr Met Ser Leu Gly Ala Glu Asn Ser
690 695 700
Val Ala Tyr Ser His Asn Ser Ile Ala Ile Pro Thr Asn Phe Thr Ile
705 710 715 720
Ser Val Thr Thr Glu Ile Leu Pro Val Ser Met Thr Lys Thr Ser Val
725 730 735
Asp Cys Thr Met Tyr Ile Cys Gly Asp Ser Thr Glu Cys Ser Asn Leu
740 745 750
Leu Leu Gln Tyr Gly Ser Phe Cys Thr Gln Leu Asn Arg Ala Leu Thr
755 760 765
Gly Ile Ala Val Glu Gln Asp Lys Asn Thr Gln Glu Val Phe Ala Gln
770 775 780
Val Lys Gln Ile Tyr Lys Thr Pro Pro Ile Lys Asp Phe Gly Gly Phe
785 790 795 800
Asn Phe Ser Gln Ile Leu Pro Asp Pro Ser Lys Pro Ser Lys Arg Ser
805 810 815
Phe Ile Glu Asp Leu Leu Phe Asn Lys Val Thr Leu Ala Asp Ala Gly
820 825 830
Phe Ile Lys Gln Tyr Gly Asp Cys Leu Gly Asp Ile Ala Ala Arg Asp
835 840 845
Leu Ile Cys Ala Gln Lys Phe Asn Gly Leu Thr Val Leu Pro Pro Leu
850 855 860
Leu Thr Asp Glu Met Ile Ala Gln Tyr Thr Ser Ala Leu Leu Ala Gly
865 870 875 880
Thr Ile Thr Ser Gly Trp Thr Phe Gly Ala Gly Ala Ala Leu Gln Ile
885 890 895
Pro Phe Ala Met Gln Met Ala Tyr Arg Phe Asn Gly Ile Gly Val Thr
900 905 910
Gln Asn Val Leu Tyr Glu Asn Gln Lys Leu Ile Ala Asn Gln Phe Asn
915 920 925
Ser Ala Ile Gly Lys Ile Gln Asp Ser Leu Ser Ser Thr Ala Ser Ala
930 935 940
Leu Gly Lys Leu Gln Asp Val Val Asn Gln Asn Ala Gln Ala Leu Asn
945 950 955 960
Thr Leu Val Lys Gln Leu Ser Ser Asn Phe Gly Ala Ile Ser Ser Val
965 970 975
Leu Asn Asp Ile Leu Ser Arg Leu Asp Lys Val Glu Ala Glu Val Gln
980 985 990
Ile Asp Arg Leu Ile Thr Gly Arg Leu Gln Ser Leu Gln Thr Tyr Val
995 1000 1005
Thr Gln Gln Leu Ile Arg Ala Ala Glu Ile Arg Ala Ser Ala Asn
1010 1015 1020
Leu Ala Ala Thr Lys Met Ser Glu Cys Val Leu Gly Gln Ser Lys
1025 1030 1035
Arg Val Asp Phe Cys Gly Lys Gly Tyr His Leu Met Ser Phe Pro
1040 1045 1050
Gln Ser Ala Pro His Gly Val Val Phe Leu His Val Thr Tyr Val
1055 1060 1065
Pro Ala Gln Glu Lys Asn Phe Thr Thr Ala Pro Ala Ile Cys His
1070 1075 1080
Asp Gly Lys Ala His Phe Pro Arg Glu Gly Val Phe Val Ser Asn
1085 1090 1095
Gly Thr His Trp Phe Val Thr Gln Arg Asn Phe Tyr Glu Pro Gln
1100 1105 1110
Ile Ile Thr Thr Asp Asn Thr Phe Val Ser Gly Asn Cys Asp Val
1115 1120 1125
Val Ile Gly Ile Val Asn Asn Thr Val Tyr Asp Pro Leu Gln Pro
1130 1135 1140
Glu Leu Asp Ser Phe Lys Glu Glu Leu Asp Lys Tyr Phe Lys Asn
1145 1150 1155
His Thr Ser Pro Asp Val Asp Leu Gly Asp Ile Ser Gly Ile Asn
1160 1165 1170
Ala Ser Val Val Asn Ile Gln Lys Glu Ile Asp Arg Leu Asn Glu
1175 1180 1185
Val Ala Lys Asn Leu Asn Glu Ser Leu Ile Asp Leu Gln Glu Leu
1190 1195 1200
Gly Lys Tyr Glu Gln Tyr Ile Lys Trp Pro Trp Tyr Ile Trp Leu
1205 1210 1215
Gly Phe Ile Ala Gly Leu Ile Ala Ile Val Met Val Thr Ile Met
1220 1225 1230
Leu Cys Cys Met Thr Ser Cys Cys Ser Cys Leu Lys Gly Cys Cys
1235 1240 1245
Ser Cys Gly Ser Cys Cys Lys Phe Asp Glu Asp Asp Ser Glu Pro
1250 1255 1260
Val Leu Lys Gly Val Lys Leu His Tyr Thr
1265 1270
<210> 8
<211> 1252
<212> PRT
<213> artificial
<220>
<223> D614G+ΔC端21a的插入片段
<400> 8
Met Phe Val Phe Leu Val Leu Leu Pro Leu Val Ser Ser Gln Cys Val
1 5 10 15
Asn Leu Thr Thr Arg Thr Gln Leu Pro Pro Ala Tyr Thr Asn Ser Phe
20 25 30
Thr Arg Gly Val Tyr Tyr Pro Asp Lys Val Phe Arg Ser Ser Val Leu
35 40 45
His Ser Thr Gln Asp Leu Phe Leu Pro Phe Phe Ser Asn Val Thr Trp
50 55 60
Phe His Ala Ile His Val Ser Gly Thr Asn Gly Thr Lys Arg Phe Asp
65 70 75 80
Asn Pro Val Leu Pro Phe Asn Asp Gly Val Tyr Phe Ala Ser Thr Glu
85 90 95
Lys Ser Asn Ile Ile Arg Gly Trp Ile Phe Gly Thr Thr Leu Asp Ser
100 105 110
Lys Thr Gln Ser Leu Leu Ile Val Asn Asn Ala Thr Asn Val Val Ile
115 120 125
Lys Val Cys Glu Phe Gln Phe Cys Asn Asp Pro Phe Leu Gly Val Tyr
130 135 140
Tyr His Lys Asn Asn Lys Ser Trp Met Glu Ser Glu Phe Arg Val Tyr
145 150 155 160
Ser Ser Ala Asn Asn Cys Thr Phe Glu Tyr Val Ser Gln Pro Phe Leu
165 170 175
Met Asp Leu Glu Gly Lys Gln Gly Asn Phe Lys Asn Leu Arg Glu Phe
180 185 190
Val Phe Lys Asn Ile Asp Gly Tyr Phe Lys Ile Tyr Ser Lys His Thr
195 200 205
Pro Ile Asn Leu Val Arg Asp Leu Pro Gln Gly Phe Ser Ala Leu Glu
210 215 220
Pro Leu Val Asp Leu Pro Ile Gly Ile Asn Ile Thr Arg Phe Gln Thr
225 230 235 240
Leu Leu Ala Leu His Arg Ser Tyr Leu Thr Pro Gly Asp Ser Ser Ser
245 250 255
Gly Trp Thr Ala Gly Ala Ala Ala Tyr Tyr Val Gly Tyr Leu Gln Pro
260 265 270
Arg Thr Phe Leu Leu Lys Tyr Asn Glu Asn Gly Thr Ile Thr Asp Ala
275 280 285
Val Asp Cys Ala Leu Asp Pro Leu Ser Glu Thr Lys Cys Thr Leu Lys
290 295 300
Ser Phe Thr Val Glu Lys Gly Ile Tyr Gln Thr Ser Asn Phe Arg Val
305 310 315 320
Gln Pro Thr Glu Ser Ile Val Arg Phe Pro Asn Ile Thr Asn Leu Cys
325 330 335
Pro Phe Gly Glu Val Phe Asn Ala Thr Arg Phe Ala Ser Val Tyr Ala
340 345 350
Trp Asn Arg Lys Arg Ile Ser Asn Cys Val Ala Asp Tyr Ser Val Leu
355 360 365
Tyr Asn Ser Ala Ser Phe Ser Thr Phe Lys Cys Tyr Gly Val Ser Pro
370 375 380
Thr Lys Leu Asn Asp Leu Cys Phe Thr Asn Val Tyr Ala Asp Ser Phe
385 390 395 400
Val Ile Arg Gly Asp Glu Val Arg Gln Ile Ala Pro Gly Gln Thr Gly
405 410 415
Lys Ile Ala Asp Tyr Asn Tyr Lys Leu Pro Asp Asp Phe Thr Gly Cys
420 425 430
Val Ile Ala Trp Asn Ser Asn Asn Leu Asp Ser Lys Val Gly Gly Asn
435 440 445
Tyr Asn Tyr Leu Tyr Arg Leu Phe Arg Lys Ser Asn Leu Lys Pro Phe
450 455 460
Glu Arg Asp Ile Ser Thr Glu Ile Tyr Gln Ala Gly Ser Thr Pro Cys
465 470 475 480
Asn Gly Val Glu Gly Phe Asn Cys Tyr Phe Pro Leu Gln Ser Tyr Gly
485 490 495
Phe Gln Pro Thr Asn Gly Val Gly Tyr Gln Pro Tyr Arg Val Val Val
500 505 510
Leu Ser Phe Glu Leu Leu His Ala Pro Ala Thr Val Cys Gly Pro Lys
515 520 525
Lys Ser Thr Asn Leu Val Lys Asn Lys Cys Val Asn Phe Asn Phe Asn
530 535 540
Gly Leu Thr Gly Thr Gly Val Leu Thr Glu Ser Asn Lys Lys Phe Leu
545 550 555 560
Pro Phe Gln Gln Phe Gly Arg Asp Ile Ala Asp Thr Thr Asp Ala Val
565 570 575
Arg Asp Pro Gln Thr Leu Glu Ile Leu Asp Ile Thr Pro Cys Ser Phe
580 585 590
Gly Gly Val Ser Val Ile Thr Pro Gly Thr Asn Thr Ser Asn Gln Val
595 600 605
Ala Val Leu Tyr Gln Gly Val Asn Cys Thr Glu Val Pro Val Ala Ile
610 615 620
His Ala Asp Gln Leu Thr Pro Thr Trp Arg Val Tyr Ser Thr Gly Ser
625 630 635 640
Asn Val Phe Gln Thr Arg Ala Gly Cys Leu Ile Gly Ala Glu His Val
645 650 655
Asn Asn Ser Tyr Glu Cys Asp Ile Pro Ile Gly Ala Gly Ile Cys Ala
660 665 670
Ser Tyr Gln Thr Gln Thr Asn Ser Pro Arg Arg Ala Arg Ser Val Ala
675 680 685
Ser Gln Ser Ile Ile Ala Tyr Thr Met Ser Leu Gly Ala Glu Asn Ser
690 695 700
Val Ala Tyr Ser Asn Asn Ser Ile Ala Ile Pro Thr Asn Phe Thr Ile
705 710 715 720
Ser Val Thr Thr Glu Ile Leu Pro Val Ser Met Thr Lys Thr Ser Val
725 730 735
Asp Cys Thr Met Tyr Ile Cys Gly Asp Ser Thr Glu Cys Ser Asn Leu
740 745 750
Leu Leu Gln Tyr Gly Ser Phe Cys Thr Gln Leu Asn Arg Ala Leu Thr
755 760 765
Gly Ile Ala Val Glu Gln Asp Lys Asn Thr Gln Glu Val Phe Ala Gln
770 775 780
Val Lys Gln Ile Tyr Lys Thr Pro Pro Ile Lys Asp Phe Gly Gly Phe
785 790 795 800
Asn Phe Ser Gln Ile Leu Pro Asp Pro Ser Lys Pro Ser Lys Arg Ser
805 810 815
Phe Ile Glu Asp Leu Leu Phe Asn Lys Val Thr Leu Ala Asp Ala Gly
820 825 830
Phe Ile Lys Gln Tyr Gly Asp Cys Leu Gly Asp Ile Ala Ala Arg Asp
835 840 845
Leu Ile Cys Ala Gln Lys Phe Asn Gly Leu Thr Val Leu Pro Pro Leu
850 855 860
Leu Thr Asp Glu Met Ile Ala Gln Tyr Thr Ser Ala Leu Leu Ala Gly
865 870 875 880
Thr Ile Thr Ser Gly Trp Thr Phe Gly Ala Gly Ala Ala Leu Gln Ile
885 890 895
Pro Phe Ala Met Gln Met Ala Tyr Arg Phe Asn Gly Ile Gly Val Thr
900 905 910
Gln Asn Val Leu Tyr Glu Asn Gln Lys Leu Ile Ala Asn Gln Phe Asn
915 920 925
Ser Ala Ile Gly Lys Ile Gln Asp Ser Leu Ser Ser Thr Ala Ser Ala
930 935 940
Leu Gly Lys Leu Gln Asp Val Val Asn Gln Asn Ala Gln Ala Leu Asn
945 950 955 960
Thr Leu Val Lys Gln Leu Ser Ser Asn Phe Gly Ala Ile Ser Ser Val
965 970 975
Leu Asn Asp Ile Leu Ser Arg Leu Asp Lys Val Glu Ala Glu Val Gln
980 985 990
Ile Asp Arg Leu Ile Thr Gly Arg Leu Gln Ser Leu Gln Thr Tyr Val
995 1000 1005
Thr Gln Gln Leu Ile Arg Ala Ala Glu Ile Arg Ala Ser Ala Asn
1010 1015 1020
Leu Ala Ala Thr Lys Met Ser Glu Cys Val Leu Gly Gln Ser Lys
1025 1030 1035
Arg Val Asp Phe Cys Gly Lys Gly Tyr His Leu Met Ser Phe Pro
1040 1045 1050
Gln Ser Ala Pro His Gly Val Val Phe Leu His Val Thr Tyr Val
1055 1060 1065
Pro Ala Gln Glu Lys Asn Phe Thr Thr Ala Pro Ala Ile Cys His
1070 1075 1080
Asp Gly Lys Ala His Phe Pro Arg Glu Gly Val Phe Val Ser Asn
1085 1090 1095
Gly Thr His Trp Phe Val Thr Gln Arg Asn Phe Tyr Glu Pro Gln
1100 1105 1110
Ile Ile Thr Thr Asp Asn Thr Phe Val Ser Gly Asn Cys Asp Val
1115 1120 1125
Val Ile Gly Ile Val Asn Asn Thr Val Tyr Asp Pro Leu Gln Pro
1130 1135 1140
Glu Leu Asp Ser Phe Lys Glu Glu Leu Asp Lys Tyr Phe Lys Asn
1145 1150 1155
His Thr Ser Pro Asp Val Asp Leu Gly Asp Ile Ser Gly Ile Asn
1160 1165 1170
Ala Ser Val Val Asn Ile Gln Lys Glu Ile Asp Arg Leu Asn Glu
1175 1180 1185
Val Ala Lys Asn Leu Asn Glu Ser Leu Ile Asp Leu Gln Glu Leu
1190 1195 1200
Gly Lys Tyr Glu Gln Tyr Ile Lys Trp Pro Trp Tyr Ile Trp Leu
1205 1210 1215
Gly Phe Ile Ala Gly Leu Ile Ala Ile Val Met Val Thr Ile Met
1220 1225 1230
Leu Cys Cys Met Thr Ser Cys Cys Ser Cys Leu Lys Gly Cys Cys
1235 1240 1245
Ser Cys Gly Ser
1250
<210> 9
<211> 1252
<212> PRT
<213> artificial
<220>
<223> D614G+ΔC端21aa+ΔFurin的插入片段
<400> 9
Met Phe Val Phe Leu Val Leu Leu Pro Leu Val Ser Ser Gln Cys Val
1 5 10 15
Asn Leu Thr Thr Arg Thr Gln Leu Pro Pro Ala Tyr Thr Asn Ser Phe
20 25 30
Thr Arg Gly Val Tyr Tyr Pro Asp Lys Val Phe Arg Ser Ser Val Leu
35 40 45
His Ser Thr Gln Asp Leu Phe Leu Pro Phe Phe Ser Asn Val Thr Trp
50 55 60
Phe His Ala Ile His Val Ser Gly Thr Asn Gly Thr Lys Arg Phe Asp
65 70 75 80
Asn Pro Val Leu Pro Phe Asn Asp Gly Val Tyr Phe Ala Ser Thr Glu
85 90 95
Lys Ser Asn Ile Ile Arg Gly Trp Ile Phe Gly Thr Thr Leu Asp Ser
100 105 110
Lys Thr Gln Ser Leu Leu Ile Val Asn Asn Ala Thr Asn Val Val Ile
115 120 125
Lys Val Cys Glu Phe Gln Phe Cys Asn Asp Pro Phe Leu Gly Val Tyr
130 135 140
Tyr His Lys Asn Asn Lys Ser Trp Met Glu Ser Glu Phe Arg Val Tyr
145 150 155 160
Ser Ser Ala Asn Asn Cys Thr Phe Glu Tyr Val Ser Gln Pro Phe Leu
165 170 175
Met Asp Leu Glu Gly Lys Gln Gly Asn Phe Lys Asn Leu Arg Glu Phe
180 185 190
Val Phe Lys Asn Ile Asp Gly Tyr Phe Lys Ile Tyr Ser Lys His Thr
195 200 205
Pro Ile Asn Leu Val Arg Asp Leu Pro Gln Gly Phe Ser Ala Leu Glu
210 215 220
Pro Leu Val Asp Leu Pro Ile Gly Ile Asn Ile Thr Arg Phe Gln Thr
225 230 235 240
Leu Leu Ala Leu His Arg Ser Tyr Leu Thr Pro Gly Asp Ser Ser Ser
245 250 255
Gly Trp Thr Ala Gly Ala Ala Ala Tyr Tyr Val Gly Tyr Leu Gln Pro
260 265 270
Arg Thr Phe Leu Leu Lys Tyr Asn Glu Asn Gly Thr Ile Thr Asp Ala
275 280 285
Val Asp Cys Ala Leu Asp Pro Leu Ser Glu Thr Lys Cys Thr Leu Lys
290 295 300
Ser Phe Thr Val Glu Lys Gly Ile Tyr Gln Thr Ser Asn Phe Arg Val
305 310 315 320
Gln Pro Thr Glu Ser Ile Val Arg Phe Pro Asn Ile Thr Asn Leu Cys
325 330 335
Pro Phe Gly Glu Val Phe Asn Ala Thr Arg Phe Ala Ser Val Tyr Ala
340 345 350
Trp Asn Arg Lys Arg Ile Ser Asn Cys Val Ala Asp Tyr Ser Val Leu
355 360 365
Tyr Asn Ser Ala Ser Phe Ser Thr Phe Lys Cys Tyr Gly Val Ser Pro
370 375 380
Thr Lys Leu Asn Asp Leu Cys Phe Thr Asn Val Tyr Ala Asp Ser Phe
385 390 395 400
Val Ile Arg Gly Asp Glu Val Arg Gln Ile Ala Pro Gly Gln Thr Gly
405 410 415
Lys Ile Ala Asp Tyr Asn Tyr Lys Leu Pro Asp Asp Phe Thr Gly Cys
420 425 430
Val Ile Ala Trp Asn Ser Asn Asn Leu Asp Ser Lys Val Gly Gly Asn
435 440 445
Tyr Asn Tyr Leu Tyr Arg Leu Phe Arg Lys Ser Asn Leu Lys Pro Phe
450 455 460
Glu Arg Asp Ile Ser Thr Glu Ile Tyr Gln Ala Gly Ser Thr Pro Cys
465 470 475 480
Asn Gly Val Glu Gly Phe Asn Cys Tyr Phe Pro Leu Gln Ser Tyr Gly
485 490 495
Phe Gln Pro Thr Asn Gly Val Gly Tyr Gln Pro Tyr Arg Val Val Val
500 505 510
Leu Ser Phe Glu Leu Leu His Ala Pro Ala Thr Val Cys Gly Pro Lys
515 520 525
Lys Ser Thr Asn Leu Val Lys Asn Lys Cys Val Asn Phe Asn Phe Asn
530 535 540
Gly Leu Thr Gly Thr Gly Val Leu Thr Glu Ser Asn Lys Lys Phe Leu
545 550 555 560
Pro Phe Gln Gln Phe Gly Arg Asp Ile Ala Asp Thr Thr Asp Ala Val
565 570 575
Arg Asp Pro Gln Thr Leu Glu Ile Leu Asp Ile Thr Pro Cys Ser Phe
580 585 590
Gly Gly Val Ser Val Ile Thr Pro Gly Thr Asn Thr Ser Asn Gln Val
595 600 605
Ala Val Leu Tyr Gln Gly Val Asn Cys Thr Glu Val Pro Val Ala Ile
610 615 620
His Ala Asp Gln Leu Thr Pro Thr Trp Arg Val Tyr Ser Thr Gly Ser
625 630 635 640
Asn Val Phe Gln Thr Arg Ala Gly Cys Leu Ile Gly Ala Glu His Val
645 650 655
Asn Asn Ser Tyr Glu Cys Asp Ile Pro Ile Gly Ala Gly Ile Cys Ala
660 665 670
Ser Tyr Gln Thr Gln Thr Asn Ser Pro Arg Arg Ala Arg Ser Val Ala
675 680 685
Ser Gln Ser Ile Ile Ala Tyr Thr Met Ser Leu Gly Ala Glu Asn Ser
690 695 700
Val Ala Tyr Ser Asn Asn Ser Ile Ala Ile Pro Thr Asn Phe Thr Ile
705 710 715 720
Ser Val Thr Thr Glu Ile Leu Pro Val Ser Met Thr Lys Thr Ser Val
725 730 735
Asp Cys Thr Met Tyr Ile Cys Gly Asp Ser Thr Glu Cys Ser Asn Leu
740 745 750
Leu Leu Gln Tyr Gly Ser Phe Cys Thr Gln Leu Asn Arg Ala Leu Thr
755 760 765
Gly Ile Ala Val Glu Gln Asp Lys Asn Thr Gln Glu Val Phe Ala Gln
770 775 780
Val Lys Gln Ile Tyr Lys Thr Pro Pro Ile Lys Asp Phe Gly Gly Phe
785 790 795 800
Asn Phe Ser Gln Ile Leu Pro Asp Pro Ser Lys Pro Ser Lys Arg Ser
805 810 815
Phe Ile Glu Asp Leu Leu Phe Asn Lys Val Thr Leu Ala Asp Ala Gly
820 825 830
Phe Ile Lys Gln Tyr Gly Asp Cys Leu Gly Asp Ile Ala Ala Arg Asp
835 840 845
Leu Ile Cys Ala Gln Lys Phe Asn Gly Leu Thr Val Leu Pro Pro Leu
850 855 860
Leu Thr Asp Glu Met Ile Ala Gln Tyr Thr Ser Ala Leu Leu Ala Gly
865 870 875 880
Thr Ile Thr Ser Gly Trp Thr Phe Gly Ala Gly Ala Ala Leu Gln Ile
885 890 895
Pro Phe Ala Met Gln Met Ala Tyr Arg Phe Asn Gly Ile Gly Val Thr
900 905 910
Gln Asn Val Leu Tyr Glu Asn Gln Lys Leu Ile Ala Asn Gln Phe Asn
915 920 925
Ser Ala Ile Gly Lys Ile Gln Asp Ser Leu Ser Ser Thr Ala Ser Ala
930 935 940
Leu Gly Lys Leu Gln Asp Val Val Asn Gln Asn Ala Gln Ala Leu Asn
945 950 955 960
Thr Leu Val Lys Gln Leu Ser Ser Asn Phe Gly Ala Ile Ser Ser Val
965 970 975
Leu Asn Asp Ile Leu Ser Arg Leu Asp Lys Val Glu Ala Glu Val Gln
980 985 990
Ile Asp Arg Leu Ile Thr Gly Arg Leu Gln Ser Leu Gln Thr Tyr Val
995 1000 1005
Thr Gln Gln Leu Ile Arg Ala Ala Glu Ile Arg Ala Ser Ala Asn
1010 1015 1020
Leu Ala Ala Thr Lys Met Ser Glu Cys Val Leu Gly Gln Ser Lys
1025 1030 1035
Arg Val Asp Phe Cys Gly Lys Gly Tyr His Leu Met Ser Phe Pro
1040 1045 1050
Gln Ser Ala Pro His Gly Val Val Phe Leu His Val Thr Tyr Val
1055 1060 1065
Pro Ala Gln Glu Lys Asn Phe Thr Thr Ala Pro Ala Ile Cys His
1070 1075 1080
Asp Gly Lys Ala His Phe Pro Arg Glu Gly Val Phe Val Ser Asn
1085 1090 1095
Gly Thr His Trp Phe Val Thr Gln Arg Asn Phe Tyr Glu Pro Gln
1100 1105 1110
Ile Ile Thr Thr Asp Asn Thr Phe Val Ser Gly Asn Cys Asp Val
1115 1120 1125
Val Ile Gly Ile Val Asn Asn Thr Val Tyr Asp Pro Leu Gln Pro
1130 1135 1140
Glu Leu Asp Ser Phe Lys Glu Glu Leu Asp Lys Tyr Phe Lys Asn
1145 1150 1155
His Thr Ser Pro Asp Val Asp Leu Gly Asp Ile Ser Gly Ile Asn
1160 1165 1170
Ala Ser Val Val Asn Ile Gln Lys Glu Ile Asp Arg Leu Asn Glu
1175 1180 1185
Val Ala Lys Asn Leu Asn Glu Ser Leu Ile Asp Leu Gln Glu Leu
1190 1195 1200
Gly Lys Tyr Glu Gln Tyr Ile Lys Trp Pro Trp Tyr Ile Trp Leu
1205 1210 1215
Gly Phe Ile Ala Gly Leu Ile Ala Ile Val Met Val Thr Ile Met
1220 1225 1230
Leu Cys Cys Met Thr Ser Cys Cys Ser Cys Leu Lys Gly Cys Cys
1235 1240 1245
Ser Cys Gly Ser
1250
<210> 10
<211> 1252
<212> PRT
<213> artificial
<220>
<223> D614G+C端21aa+ K417N的插入片段
<400> 10
Met Phe Val Phe Leu Val Leu Leu Pro Leu Val Ser Ser Gln Cys Val
1 5 10 15
Asn Leu Thr Thr Arg Thr Gln Leu Pro Pro Ala Tyr Thr Asn Ser Phe
20 25 30
Thr Arg Gly Val Tyr Tyr Pro Asp Lys Val Phe Arg Ser Ser Val Leu
35 40 45
His Ser Thr Gln Asp Leu Phe Leu Pro Phe Phe Ser Asn Val Thr Trp
50 55 60
Phe His Ala Ile His Val Ser Gly Thr Asn Gly Thr Lys Arg Phe Asp
65 70 75 80
Asn Pro Val Leu Pro Phe Asn Asp Gly Val Tyr Phe Ala Ser Thr Glu
85 90 95
Lys Ser Asn Ile Ile Arg Gly Trp Ile Phe Gly Thr Thr Leu Asp Ser
100 105 110
Lys Thr Gln Ser Leu Leu Ile Val Asn Asn Ala Thr Asn Val Val Ile
115 120 125
Lys Val Cys Glu Phe Gln Phe Cys Asn Asp Pro Phe Leu Gly Val Tyr
130 135 140
Tyr His Lys Asn Asn Lys Ser Trp Met Glu Ser Glu Phe Arg Val Tyr
145 150 155 160
Ser Ser Ala Asn Asn Cys Thr Phe Glu Tyr Val Ser Gln Pro Phe Leu
165 170 175
Met Asp Leu Glu Gly Lys Gln Gly Asn Phe Lys Asn Leu Arg Glu Phe
180 185 190
Val Phe Lys Asn Ile Asp Gly Tyr Phe Lys Ile Tyr Ser Lys His Thr
195 200 205
Pro Ile Asn Leu Val Arg Asp Leu Pro Gln Gly Phe Ser Ala Leu Glu
210 215 220
Pro Leu Val Asp Leu Pro Ile Gly Ile Asn Ile Thr Arg Phe Gln Thr
225 230 235 240
Leu Leu Ala Leu His Arg Ser Tyr Leu Thr Pro Gly Asp Ser Ser Ser
245 250 255
Gly Trp Thr Ala Gly Ala Ala Ala Tyr Tyr Val Gly Tyr Leu Gln Pro
260 265 270
Arg Thr Phe Leu Leu Lys Tyr Asn Glu Asn Gly Thr Ile Thr Asp Ala
275 280 285
Val Asp Cys Ala Leu Asp Pro Leu Ser Glu Thr Lys Cys Thr Leu Lys
290 295 300
Ser Phe Thr Val Glu Lys Gly Ile Tyr Gln Thr Ser Asn Phe Arg Val
305 310 315 320
Gln Pro Thr Glu Ser Ile Val Arg Phe Pro Asn Ile Thr Asn Leu Cys
325 330 335
Pro Phe Gly Glu Val Phe Asn Ala Thr Arg Phe Ala Ser Val Tyr Ala
340 345 350
Trp Asn Arg Lys Arg Ile Ser Asn Cys Val Ala Asp Tyr Ser Val Leu
355 360 365
Tyr Asn Ser Ala Ser Phe Ser Thr Phe Lys Cys Tyr Gly Val Ser Pro
370 375 380
Thr Lys Leu Asn Asp Leu Cys Phe Thr Asn Val Tyr Ala Asp Ser Phe
385 390 395 400
Val Ile Arg Gly Asp Glu Val Arg Gln Ile Ala Pro Gly Gln Thr Gly
405 410 415
Asn Ile Ala Asp Tyr Asn Tyr Lys Leu Pro Asp Asp Phe Thr Gly Cys
420 425 430
Val Ile Ala Trp Asn Ser Asn Asn Leu Asp Ser Lys Val Gly Gly Asn
435 440 445
Tyr Asn Tyr Leu Tyr Arg Leu Phe Arg Lys Ser Asn Leu Lys Pro Phe
450 455 460
Glu Arg Asp Ile Ser Thr Glu Ile Tyr Gln Ala Gly Ser Thr Pro Cys
465 470 475 480
Asn Gly Val Glu Gly Phe Asn Cys Tyr Phe Pro Leu Gln Ser Tyr Gly
485 490 495
Phe Gln Pro Thr Asn Gly Val Gly Tyr Gln Pro Tyr Arg Val Val Val
500 505 510
Leu Ser Phe Glu Leu Leu His Ala Pro Ala Thr Val Cys Gly Pro Lys
515 520 525
Lys Ser Thr Asn Leu Val Lys Asn Lys Cys Val Asn Phe Asn Phe Asn
530 535 540
Gly Leu Thr Gly Thr Gly Val Leu Thr Glu Ser Asn Lys Lys Phe Leu
545 550 555 560
Pro Phe Gln Gln Phe Gly Arg Asp Ile Ala Asp Thr Thr Asp Ala Val
565 570 575
Arg Asp Pro Gln Thr Leu Glu Ile Leu Asp Ile Thr Pro Cys Ser Phe
580 585 590
Gly Gly Val Ser Val Ile Thr Pro Gly Thr Asn Thr Ser Asn Gln Val
595 600 605
Ala Val Leu Tyr Gln Gly Val Asn Cys Thr Glu Val Pro Val Ala Ile
610 615 620
His Ala Asp Gln Leu Thr Pro Thr Trp Arg Val Tyr Ser Thr Gly Ser
625 630 635 640
Asn Val Phe Gln Thr Arg Ala Gly Cys Leu Ile Gly Ala Glu His Val
645 650 655
Asn Asn Ser Tyr Glu Cys Asp Ile Pro Ile Gly Ala Gly Ile Cys Ala
660 665 670
Ser Tyr Gln Thr Gln Thr Asn Ser Pro Arg Arg Ala Arg Ser Val Ala
675 680 685
Ser Gln Ser Ile Ile Ala Tyr Thr Met Ser Leu Gly Ala Glu Asn Ser
690 695 700
Val Ala Tyr Ser Asn Asn Ser Ile Ala Ile Pro Thr Asn Phe Thr Ile
705 710 715 720
Ser Val Thr Thr Glu Ile Leu Pro Val Ser Met Thr Lys Thr Ser Val
725 730 735
Asp Cys Thr Met Tyr Ile Cys Gly Asp Ser Thr Glu Cys Ser Asn Leu
740 745 750
Leu Leu Gln Tyr Gly Ser Phe Cys Thr Gln Leu Asn Arg Ala Leu Thr
755 760 765
Gly Ile Ala Val Glu Gln Asp Lys Asn Thr Gln Glu Val Phe Ala Gln
770 775 780
Val Lys Gln Ile Tyr Lys Thr Pro Pro Ile Lys Asp Phe Gly Gly Phe
785 790 795 800
Asn Phe Ser Gln Ile Leu Pro Asp Pro Ser Lys Pro Ser Lys Arg Ser
805 810 815
Phe Ile Glu Asp Leu Leu Phe Asn Lys Val Thr Leu Ala Asp Ala Gly
820 825 830
Phe Ile Lys Gln Tyr Gly Asp Cys Leu Gly Asp Ile Ala Ala Arg Asp
835 840 845
Leu Ile Cys Ala Gln Lys Phe Asn Gly Leu Thr Val Leu Pro Pro Leu
850 855 860
Leu Thr Asp Glu Met Ile Ala Gln Tyr Thr Ser Ala Leu Leu Ala Gly
865 870 875 880
Thr Ile Thr Ser Gly Trp Thr Phe Gly Ala Gly Ala Ala Leu Gln Ile
885 890 895
Pro Phe Ala Met Gln Met Ala Tyr Arg Phe Asn Gly Ile Gly Val Thr
900 905 910
Gln Asn Val Leu Tyr Glu Asn Gln Lys Leu Ile Ala Asn Gln Phe Asn
915 920 925
Ser Ala Ile Gly Lys Ile Gln Asp Ser Leu Ser Ser Thr Ala Ser Ala
930 935 940
Leu Gly Lys Leu Gln Asp Val Val Asn Gln Asn Ala Gln Ala Leu Asn
945 950 955 960
Thr Leu Val Lys Gln Leu Ser Ser Asn Phe Gly Ala Ile Ser Ser Val
965 970 975
Leu Asn Asp Ile Leu Ser Arg Leu Asp Lys Val Glu Ala Glu Val Gln
980 985 990
Ile Asp Arg Leu Ile Thr Gly Arg Leu Gln Ser Leu Gln Thr Tyr Val
995 1000 1005
Thr Gln Gln Leu Ile Arg Ala Ala Glu Ile Arg Ala Ser Ala Asn
1010 1015 1020
Leu Ala Ala Thr Lys Met Ser Glu Cys Val Leu Gly Gln Ser Lys
1025 1030 1035
Arg Val Asp Phe Cys Gly Lys Gly Tyr His Leu Met Ser Phe Pro
1040 1045 1050
Gln Ser Ala Pro His Gly Val Val Phe Leu His Val Thr Tyr Val
1055 1060 1065
Pro Ala Gln Glu Lys Asn Phe Thr Thr Ala Pro Ala Ile Cys His
1070 1075 1080
Asp Gly Lys Ala His Phe Pro Arg Glu Gly Val Phe Val Ser Asn
1085 1090 1095
Gly Thr His Trp Phe Val Thr Gln Arg Asn Phe Tyr Glu Pro Gln
1100 1105 1110
Ile Ile Thr Thr Asp Asn Thr Phe Val Ser Gly Asn Cys Asp Val
1115 1120 1125
Val Ile Gly Ile Val Asn Asn Thr Val Tyr Asp Pro Leu Gln Pro
1130 1135 1140
Glu Leu Asp Ser Phe Lys Glu Glu Leu Asp Lys Tyr Phe Lys Asn
1145 1150 1155
His Thr Ser Pro Asp Val Asp Leu Gly Asp Ile Ser Gly Ile Asn
1160 1165 1170
Ala Ser Val Val Asn Ile Gln Lys Glu Ile Asp Arg Leu Asn Glu
1175 1180 1185
Val Ala Lys Asn Leu Asn Glu Ser Leu Ile Asp Leu Gln Glu Leu
1190 1195 1200
Gly Lys Tyr Glu Gln Tyr Ile Lys Trp Pro Trp Tyr Ile Trp Leu
1205 1210 1215
Gly Phe Ile Ala Gly Leu Ile Ala Ile Val Met Val Thr Ile Met
1220 1225 1230
Leu Cys Cys Met Thr Ser Cys Cys Ser Cys Leu Lys Gly Cys Cys
1235 1240 1245
Ser Cys Gly Ser
1250
<210> 11
<211> 1252
<212> PRT
<213> artificial
<220>
<223> D614G+ΔC端21aa +K417N+ Q613H+ N709H的插入片段
<400> 11
Met Phe Val Phe Leu Val Leu Leu Pro Leu Val Ser Ser Gln Cys Val
1 5 10 15
Asn Leu Thr Thr Arg Thr Gln Leu Pro Pro Ala Tyr Thr Asn Ser Phe
20 25 30
Thr Arg Gly Val Tyr Tyr Pro Asp Lys Val Phe Arg Ser Ser Val Leu
35 40 45
His Ser Thr Gln Asp Leu Phe Leu Pro Phe Phe Ser Asn Val Thr Trp
50 55 60
Phe His Ala Ile His Val Ser Gly Thr Asn Gly Thr Lys Arg Phe Asp
65 70 75 80
Asn Pro Val Leu Pro Phe Asn Asp Gly Val Tyr Phe Ala Ser Thr Glu
85 90 95
Lys Ser Asn Ile Ile Arg Gly Trp Ile Phe Gly Thr Thr Leu Asp Ser
100 105 110
Lys Thr Gln Ser Leu Leu Ile Val Asn Asn Ala Thr Asn Val Val Ile
115 120 125
Lys Val Cys Glu Phe Gln Phe Cys Asn Asp Pro Phe Leu Gly Val Tyr
130 135 140
Tyr His Lys Asn Asn Lys Ser Trp Met Glu Ser Glu Phe Arg Val Tyr
145 150 155 160
Ser Ser Ala Asn Asn Cys Thr Phe Glu Tyr Val Ser Gln Pro Phe Leu
165 170 175
Met Asp Leu Glu Gly Lys Gln Gly Asn Phe Lys Asn Leu Arg Glu Phe
180 185 190
Val Phe Lys Asn Ile Asp Gly Tyr Phe Lys Ile Tyr Ser Lys His Thr
195 200 205
Pro Ile Asn Leu Val Arg Asp Leu Pro Gln Gly Phe Ser Ala Leu Glu
210 215 220
Pro Leu Val Asp Leu Pro Ile Gly Ile Asn Ile Thr Arg Phe Gln Thr
225 230 235 240
Leu Leu Ala Leu His Arg Ser Tyr Leu Thr Pro Gly Asp Ser Ser Ser
245 250 255
Gly Trp Thr Ala Gly Ala Ala Ala Tyr Tyr Val Gly Tyr Leu Gln Pro
260 265 270
Arg Thr Phe Leu Leu Lys Tyr Asn Glu Asn Gly Thr Ile Thr Asp Ala
275 280 285
Val Asp Cys Ala Leu Asp Pro Leu Ser Glu Thr Lys Cys Thr Leu Lys
290 295 300
Ser Phe Thr Val Glu Lys Gly Ile Tyr Gln Thr Ser Asn Phe Arg Val
305 310 315 320
Gln Pro Thr Glu Ser Ile Val Arg Phe Pro Asn Ile Thr Asn Leu Cys
325 330 335
Pro Phe Gly Glu Val Phe Asn Ala Thr Arg Phe Ala Ser Val Tyr Ala
340 345 350
Trp Asn Arg Lys Arg Ile Ser Asn Cys Val Ala Asp Tyr Ser Val Leu
355 360 365
Tyr Asn Ser Ala Ser Phe Ser Thr Phe Lys Cys Tyr Gly Val Ser Pro
370 375 380
Thr Lys Leu Asn Asp Leu Cys Phe Thr Asn Val Tyr Ala Asp Ser Phe
385 390 395 400
Val Ile Arg Gly Asp Glu Val Arg Gln Ile Ala Pro Gly Gln Thr Gly
405 410 415
Asn Ile Ala Asp Tyr Asn Tyr Lys Leu Pro Asp Asp Phe Thr Gly Cys
420 425 430
Val Ile Ala Trp Asn Ser Asn Asn Leu Asp Ser Lys Val Gly Gly Asn
435 440 445
Tyr Asn Tyr Leu Tyr Arg Leu Phe Arg Lys Ser Asn Leu Lys Pro Phe
450 455 460
Glu Arg Asp Ile Ser Thr Glu Ile Tyr Gln Ala Gly Ser Thr Pro Cys
465 470 475 480
Asn Gly Val Glu Gly Phe Asn Cys Tyr Phe Pro Leu Gln Ser Tyr Gly
485 490 495
Phe Gln Pro Thr Asn Gly Val Gly Tyr Gln Pro Tyr Arg Val Val Val
500 505 510
Leu Ser Phe Glu Leu Leu His Ala Pro Ala Thr Val Cys Gly Pro Lys
515 520 525
Lys Ser Thr Asn Leu Val Lys Asn Lys Cys Val Asn Phe Asn Phe Asn
530 535 540
Gly Leu Thr Gly Thr Gly Val Leu Thr Glu Ser Asn Lys Lys Phe Leu
545 550 555 560
Pro Phe Gln Gln Phe Gly Arg Asp Ile Ala Asp Thr Thr Asp Ala Val
565 570 575
Arg Asp Pro Gln Thr Leu Glu Ile Leu Asp Ile Thr Pro Cys Ser Phe
580 585 590
Gly Gly Val Ser Val Ile Thr Pro Gly Thr Asn Thr Ser Asn Gln Val
595 600 605
Ala Val Leu Tyr His Gly Val Asn Cys Thr Glu Val Pro Val Ala Ile
610 615 620
His Ala Asp Gln Leu Thr Pro Thr Trp Arg Val Tyr Ser Thr Gly Ser
625 630 635 640
Asn Val Phe Gln Thr Arg Ala Gly Cys Leu Ile Gly Ala Glu His Val
645 650 655
Asn Asn Ser Tyr Glu Cys Asp Ile Pro Ile Gly Ala Gly Ile Cys Ala
660 665 670
Ser Tyr Gln Thr Gln Thr Asn Ser Pro Arg Arg Ala Arg Ser Val Ala
675 680 685
Ser Gln Ser Ile Ile Ala Tyr Thr Met Ser Leu Gly Ala Glu Asn Ser
690 695 700
Val Ala Tyr Ser His Asn Ser Ile Ala Ile Pro Thr Asn Phe Thr Ile
705 710 715 720
Ser Val Thr Thr Glu Ile Leu Pro Val Ser Met Thr Lys Thr Ser Val
725 730 735
Asp Cys Thr Met Tyr Ile Cys Gly Asp Ser Thr Glu Cys Ser Asn Leu
740 745 750
Leu Leu Gln Tyr Gly Ser Phe Cys Thr Gln Leu Asn Arg Ala Leu Thr
755 760 765
Gly Ile Ala Val Glu Gln Asp Lys Asn Thr Gln Glu Val Phe Ala Gln
770 775 780
Val Lys Gln Ile Tyr Lys Thr Pro Pro Ile Lys Asp Phe Gly Gly Phe
785 790 795 800
Asn Phe Ser Gln Ile Leu Pro Asp Pro Ser Lys Pro Ser Lys Arg Ser
805 810 815
Phe Ile Glu Asp Leu Leu Phe Asn Lys Val Thr Leu Ala Asp Ala Gly
820 825 830
Phe Ile Lys Gln Tyr Gly Asp Cys Leu Gly Asp Ile Ala Ala Arg Asp
835 840 845
Leu Ile Cys Ala Gln Lys Phe Asn Gly Leu Thr Val Leu Pro Pro Leu
850 855 860
Leu Thr Asp Glu Met Ile Ala Gln Tyr Thr Ser Ala Leu Leu Ala Gly
865 870 875 880
Thr Ile Thr Ser Gly Trp Thr Phe Gly Ala Gly Ala Ala Leu Gln Ile
885 890 895
Pro Phe Ala Met Gln Met Ala Tyr Arg Phe Asn Gly Ile Gly Val Thr
900 905 910
Gln Asn Val Leu Tyr Glu Asn Gln Lys Leu Ile Ala Asn Gln Phe Asn
915 920 925
Ser Ala Ile Gly Lys Ile Gln Asp Ser Leu Ser Ser Thr Ala Ser Ala
930 935 940
Leu Gly Lys Leu Gln Asp Val Val Asn Gln Asn Ala Gln Ala Leu Asn
945 950 955 960
Thr Leu Val Lys Gln Leu Ser Ser Asn Phe Gly Ala Ile Ser Ser Val
965 970 975
Leu Asn Asp Ile Leu Ser Arg Leu Asp Lys Val Glu Ala Glu Val Gln
980 985 990
Ile Asp Arg Leu Ile Thr Gly Arg Leu Gln Ser Leu Gln Thr Tyr Val
995 1000 1005
Thr Gln Gln Leu Ile Arg Ala Ala Glu Ile Arg Ala Ser Ala Asn
1010 1015 1020
Leu Ala Ala Thr Lys Met Ser Glu Cys Val Leu Gly Gln Ser Lys
1025 1030 1035
Arg Val Asp Phe Cys Gly Lys Gly Tyr His Leu Met Ser Phe Pro
1040 1045 1050
Gln Ser Ala Pro His Gly Val Val Phe Leu His Val Thr Tyr Val
1055 1060 1065
Pro Ala Gln Glu Lys Asn Phe Thr Thr Ala Pro Ala Ile Cys His
1070 1075 1080
Asp Gly Lys Ala His Phe Pro Arg Glu Gly Val Phe Val Ser Asn
1085 1090 1095
Gly Thr His Trp Phe Val Thr Gln Arg Asn Phe Tyr Glu Pro Gln
1100 1105 1110
Ile Ile Thr Thr Asp Asn Thr Phe Val Ser Gly Asn Cys Asp Val
1115 1120 1125
Val Ile Gly Ile Val Asn Asn Thr Val Tyr Asp Pro Leu Gln Pro
1130 1135 1140
Glu Leu Asp Ser Phe Lys Glu Glu Leu Asp Lys Tyr Phe Lys Asn
1145 1150 1155
His Thr Ser Pro Asp Val Asp Leu Gly Asp Ile Ser Gly Ile Asn
1160 1165 1170
Ala Ser Val Val Asn Ile Gln Lys Glu Ile Asp Arg Leu Asn Glu
1175 1180 1185
Val Ala Lys Asn Leu Asn Glu Ser Leu Ile Asp Leu Gln Glu Leu
1190 1195 1200
Gly Lys Tyr Glu Gln Tyr Ile Lys Trp Pro Trp Tyr Ile Trp Leu
1205 1210 1215
Gly Phe Ile Ala Gly Leu Ile Ala Ile Val Met Val Thr Ile Met
1220 1225 1230
Leu Cys Cys Met Thr Ser Cys Cys Ser Cys Leu Lys Gly Cys Cys
1235 1240 1245
Ser Cys Gly Ser
1250
<210> 12
<211> 1248
<212> PRT
<213> artificial
<220>
<223> D614G+ΔC端21aa +K417N+ Q613H+ΔFurin+N709H的插入片段
<400> 12
Met Phe Val Phe Leu Val Leu Leu Pro Leu Val Ser Ser Gln Cys Val
1 5 10 15
Asn Leu Thr Thr Arg Thr Gln Leu Pro Pro Ala Tyr Thr Asn Ser Phe
20 25 30
Thr Arg Gly Val Tyr Tyr Pro Asp Lys Val Phe Arg Ser Ser Val Leu
35 40 45
His Ser Thr Gln Asp Leu Phe Leu Pro Phe Phe Ser Asn Val Thr Trp
50 55 60
Phe His Ala Ile His Val Ser Gly Thr Asn Gly Thr Lys Arg Phe Asp
65 70 75 80
Asn Pro Val Leu Pro Phe Asn Asp Gly Val Tyr Phe Ala Ser Thr Glu
85 90 95
Lys Ser Asn Ile Ile Arg Gly Trp Ile Phe Gly Thr Thr Leu Asp Ser
100 105 110
Lys Thr Gln Ser Leu Leu Ile Val Asn Asn Ala Thr Asn Val Val Ile
115 120 125
Lys Val Cys Glu Phe Gln Phe Cys Asn Asp Pro Phe Leu Gly Val Tyr
130 135 140
Tyr His Lys Asn Asn Lys Ser Trp Met Glu Ser Glu Phe Arg Val Tyr
145 150 155 160
Ser Ser Ala Asn Asn Cys Thr Phe Glu Tyr Val Ser Gln Pro Phe Leu
165 170 175
Met Asp Leu Glu Gly Lys Gln Gly Asn Phe Lys Asn Leu Arg Glu Phe
180 185 190
Val Phe Lys Asn Ile Asp Gly Tyr Phe Lys Ile Tyr Ser Lys His Thr
195 200 205
Pro Ile Asn Leu Val Arg Asp Leu Pro Gln Gly Phe Ser Ala Leu Glu
210 215 220
Pro Leu Val Asp Leu Pro Ile Gly Ile Asn Ile Thr Arg Phe Gln Thr
225 230 235 240
Leu Leu Ala Leu His Arg Ser Tyr Leu Thr Pro Gly Asp Ser Ser Ser
245 250 255
Gly Trp Thr Ala Gly Ala Ala Ala Tyr Tyr Val Gly Tyr Leu Gln Pro
260 265 270
Arg Thr Phe Leu Leu Lys Tyr Asn Glu Asn Gly Thr Ile Thr Asp Ala
275 280 285
Val Asp Cys Ala Leu Asp Pro Leu Ser Glu Thr Lys Cys Thr Leu Lys
290 295 300
Ser Phe Thr Val Glu Lys Gly Ile Tyr Gln Thr Ser Asn Phe Arg Val
305 310 315 320
Gln Pro Thr Glu Ser Ile Val Arg Phe Pro Asn Ile Thr Asn Leu Cys
325 330 335
Pro Phe Gly Glu Val Phe Asn Ala Thr Arg Phe Ala Ser Val Tyr Ala
340 345 350
Trp Asn Arg Lys Arg Ile Ser Asn Cys Val Ala Asp Tyr Ser Val Leu
355 360 365
Tyr Asn Ser Ala Ser Phe Ser Thr Phe Lys Cys Tyr Gly Val Ser Pro
370 375 380
Thr Lys Leu Asn Asp Leu Cys Phe Thr Asn Val Tyr Ala Asp Ser Phe
385 390 395 400
Val Ile Arg Gly Asp Glu Val Arg Gln Ile Ala Pro Gly Gln Thr Gly
405 410 415
Asn Ile Ala Asp Tyr Asn Tyr Lys Leu Pro Asp Asp Phe Thr Gly Cys
420 425 430
Val Ile Ala Trp Asn Ser Asn Asn Leu Asp Ser Lys Val Gly Gly Asn
435 440 445
Tyr Asn Tyr Leu Tyr Arg Leu Phe Arg Lys Ser Asn Leu Lys Pro Phe
450 455 460
Glu Arg Asp Ile Ser Thr Glu Ile Tyr Gln Ala Gly Ser Thr Pro Cys
465 470 475 480
Asn Gly Val Glu Gly Phe Asn Cys Tyr Phe Pro Leu Gln Ser Tyr Gly
485 490 495
Phe Gln Pro Thr Asn Gly Val Gly Tyr Gln Pro Tyr Arg Val Val Val
500 505 510
Leu Ser Phe Glu Leu Leu His Ala Pro Ala Thr Val Cys Gly Pro Lys
515 520 525
Lys Ser Thr Asn Leu Val Lys Asn Lys Cys Val Asn Phe Asn Phe Asn
530 535 540
Gly Leu Thr Gly Thr Gly Val Leu Thr Glu Ser Asn Lys Lys Phe Leu
545 550 555 560
Pro Phe Gln Gln Phe Gly Arg Asp Ile Ala Asp Thr Thr Asp Ala Val
565 570 575
Arg Asp Pro Gln Thr Leu Glu Ile Leu Asp Ile Thr Pro Cys Ser Phe
580 585 590
Gly Gly Val Ser Val Ile Thr Pro Gly Thr Asn Thr Ser Asn Gln Val
595 600 605
Ala Val Leu Tyr His Gly Val Asn Cys Thr Glu Val Pro Val Ala Ile
610 615 620
His Ala Asp Gln Leu Thr Pro Thr Trp Arg Val Tyr Ser Thr Gly Ser
625 630 635 640
Asn Val Phe Gln Thr Arg Ala Gly Cys Leu Ile Gly Ala Glu His Val
645 650 655
Asn Asn Ser Tyr Glu Cys Asp Ile Pro Ile Gly Ala Gly Ile Cys Ala
660 665 670
Ser Tyr Gln Thr Gln Thr Asn Ser Arg Ser Val Ala Ser Gln Ser Ile
675 680 685
Ile Ala Tyr Thr Met Ser Leu Gly Ala Glu Asn Ser Val Ala Tyr Ser
690 695 700
His Asn Ser Ile Ala Ile Pro Thr Asn Phe Thr Ile Ser Val Thr Thr
705 710 715 720
Glu Ile Leu Pro Val Ser Met Thr Lys Thr Ser Val Asp Cys Thr Met
725 730 735
Tyr Ile Cys Gly Asp Ser Thr Glu Cys Ser Asn Leu Leu Leu Gln Tyr
740 745 750
Gly Ser Phe Cys Thr Gln Leu Asn Arg Ala Leu Thr Gly Ile Ala Val
755 760 765
Glu Gln Asp Lys Asn Thr Gln Glu Val Phe Ala Gln Val Lys Gln Ile
770 775 780
Tyr Lys Thr Pro Pro Ile Lys Asp Phe Gly Gly Phe Asn Phe Ser Gln
785 790 795 800
Ile Leu Pro Asp Pro Ser Lys Pro Ser Lys Arg Ser Phe Ile Glu Asp
805 810 815
Leu Leu Phe Asn Lys Val Thr Leu Ala Asp Ala Gly Phe Ile Lys Gln
820 825 830
Tyr Gly Asp Cys Leu Gly Asp Ile Ala Ala Arg Asp Leu Ile Cys Ala
835 840 845
Gln Lys Phe Asn Gly Leu Thr Val Leu Pro Pro Leu Leu Thr Asp Glu
850 855 860
Met Ile Ala Gln Tyr Thr Ser Ala Leu Leu Ala Gly Thr Ile Thr Ser
865 870 875 880
Gly Trp Thr Phe Gly Ala Gly Ala Ala Leu Gln Ile Pro Phe Ala Met
885 890 895
Gln Met Ala Tyr Arg Phe Asn Gly Ile Gly Val Thr Gln Asn Val Leu
900 905 910
Tyr Glu Asn Gln Lys Leu Ile Ala Asn Gln Phe Asn Ser Ala Ile Gly
915 920 925
Lys Ile Gln Asp Ser Leu Ser Ser Thr Ala Ser Ala Leu Gly Lys Leu
930 935 940
Gln Asp Val Val Asn Gln Asn Ala Gln Ala Leu Asn Thr Leu Val Lys
945 950 955 960
Gln Leu Ser Ser Asn Phe Gly Ala Ile Ser Ser Val Leu Asn Asp Ile
965 970 975
Leu Ser Arg Leu Asp Lys Val Glu Ala Glu Val Gln Ile Asp Arg Leu
980 985 990
Ile Thr Gly Arg Leu Gln Ser Leu Gln Thr Tyr Val Thr Gln Gln Leu
995 1000 1005
Ile Arg Ala Ala Glu Ile Arg Ala Ser Ala Asn Leu Ala Ala Thr
1010 1015 1020
Lys Met Ser Glu Cys Val Leu Gly Gln Ser Lys Arg Val Asp Phe
1025 1030 1035
Cys Gly Lys Gly Tyr His Leu Met Ser Phe Pro Gln Ser Ala Pro
1040 1045 1050
His Gly Val Val Phe Leu His Val Thr Tyr Val Pro Ala Gln Glu
1055 1060 1065
Lys Asn Phe Thr Thr Ala Pro Ala Ile Cys His Asp Gly Lys Ala
1070 1075 1080
His Phe Pro Arg Glu Gly Val Phe Val Ser Asn Gly Thr His Trp
1085 1090 1095
Phe Val Thr Gln Arg Asn Phe Tyr Glu Pro Gln Ile Ile Thr Thr
1100 1105 1110
Asp Asn Thr Phe Val Ser Gly Asn Cys Asp Val Val Ile Gly Ile
1115 1120 1125
Val Asn Asn Thr Val Tyr Asp Pro Leu Gln Pro Glu Leu Asp Ser
1130 1135 1140
Phe Lys Glu Glu Leu Asp Lys Tyr Phe Lys Asn His Thr Ser Pro
1145 1150 1155
Asp Val Asp Leu Gly Asp Ile Ser Gly Ile Asn Ala Ser Val Val
1160 1165 1170
Asn Ile Gln Lys Glu Ile Asp Arg Leu Asn Glu Val Ala Lys Asn
1175 1180 1185
Leu Asn Glu Ser Leu Ile Asp Leu Gln Glu Leu Gly Lys Tyr Glu
1190 1195 1200
Gln Tyr Ile Lys Trp Pro Trp Tyr Ile Trp Leu Gly Phe Ile Ala
1205 1210 1215
Gly Leu Ile Ala Ile Val Met Val Thr Ile Met Leu Cys Cys Met
1220 1225 1230
Thr Ser Cys Cys Ser Cys Leu Lys Gly Cys Cys Ser Cys Gly Ser
1235 1240 1245
<210> 13
<211> 1273
<212> PRT
<213> artificial
<220>
<223> D614G+ +K417N+ Q613H+N709H的插入片段
<400> 13
Met Phe Val Phe Leu Val Leu Leu Pro Leu Val Ser Ser Gln Cys Val
1 5 10 15
Asn Leu Thr Thr Arg Thr Gln Leu Pro Pro Ala Tyr Thr Asn Ser Phe
20 25 30
Thr Arg Gly Val Tyr Tyr Pro Asp Lys Val Phe Arg Ser Ser Val Leu
35 40 45
His Ser Thr Gln Asp Leu Phe Leu Pro Phe Phe Ser Asn Val Thr Trp
50 55 60
Phe His Ala Ile His Val Ser Gly Thr Asn Gly Thr Lys Arg Phe Asp
65 70 75 80
Asn Pro Val Leu Pro Phe Asn Asp Gly Val Tyr Phe Ala Ser Thr Glu
85 90 95
Lys Ser Asn Ile Ile Arg Gly Trp Ile Phe Gly Thr Thr Leu Asp Ser
100 105 110
Lys Thr Gln Ser Leu Leu Ile Val Asn Asn Ala Thr Asn Val Val Ile
115 120 125
Lys Val Cys Glu Phe Gln Phe Cys Asn Asp Pro Phe Leu Gly Val Tyr
130 135 140
Tyr His Lys Asn Asn Lys Ser Trp Met Glu Ser Glu Phe Arg Val Tyr
145 150 155 160
Ser Ser Ala Asn Asn Cys Thr Phe Glu Tyr Val Ser Gln Pro Phe Leu
165 170 175
Met Asp Leu Glu Gly Lys Gln Gly Asn Phe Lys Asn Leu Arg Glu Phe
180 185 190
Val Phe Lys Asn Ile Asp Gly Tyr Phe Lys Ile Tyr Ser Lys His Thr
195 200 205
Pro Ile Asn Leu Val Arg Asp Leu Pro Gln Gly Phe Ser Ala Leu Glu
210 215 220
Pro Leu Val Asp Leu Pro Ile Gly Ile Asn Ile Thr Arg Phe Gln Thr
225 230 235 240
Leu Leu Ala Leu His Arg Ser Tyr Leu Thr Pro Gly Asp Ser Ser Ser
245 250 255
Gly Trp Thr Ala Gly Ala Ala Ala Tyr Tyr Val Gly Tyr Leu Gln Pro
260 265 270
Arg Thr Phe Leu Leu Lys Tyr Asn Glu Asn Gly Thr Ile Thr Asp Ala
275 280 285
Val Asp Cys Ala Leu Asp Pro Leu Ser Glu Thr Lys Cys Thr Leu Lys
290 295 300
Ser Phe Thr Val Glu Lys Gly Ile Tyr Gln Thr Ser Asn Phe Arg Val
305 310 315 320
Gln Pro Thr Glu Ser Ile Val Arg Phe Pro Asn Ile Thr Asn Leu Cys
325 330 335
Pro Phe Gly Glu Val Phe Asn Ala Thr Arg Phe Ala Ser Val Tyr Ala
340 345 350
Trp Asn Arg Lys Arg Ile Ser Asn Cys Val Ala Asp Tyr Ser Val Leu
355 360 365
Tyr Asn Ser Ala Ser Phe Ser Thr Phe Lys Cys Tyr Gly Val Ser Pro
370 375 380
Thr Lys Leu Asn Asp Leu Cys Phe Thr Asn Val Tyr Ala Asp Ser Phe
385 390 395 400
Val Ile Arg Gly Asp Glu Val Arg Gln Ile Ala Pro Gly Gln Thr Gly
405 410 415
Asn Ile Ala Asp Tyr Asn Tyr Lys Leu Pro Asp Asp Phe Thr Gly Cys
420 425 430
Val Ile Ala Trp Asn Ser Asn Asn Leu Asp Ser Lys Val Gly Gly Asn
435 440 445
Tyr Asn Tyr Leu Tyr Arg Leu Phe Arg Lys Ser Asn Leu Lys Pro Phe
450 455 460
Glu Arg Asp Ile Ser Thr Glu Ile Tyr Gln Ala Gly Ser Thr Pro Cys
465 470 475 480
Asn Gly Val Glu Gly Phe Asn Cys Tyr Phe Pro Leu Gln Ser Tyr Gly
485 490 495
Phe Gln Pro Thr Asn Gly Val Gly Tyr Gln Pro Tyr Arg Val Val Val
500 505 510
Leu Ser Phe Glu Leu Leu His Ala Pro Ala Thr Val Cys Gly Pro Lys
515 520 525
Lys Ser Thr Asn Leu Val Lys Asn Lys Cys Val Asn Phe Asn Phe Asn
530 535 540
Gly Leu Thr Gly Thr Gly Val Leu Thr Glu Ser Asn Lys Lys Phe Leu
545 550 555 560
Pro Phe Gln Gln Phe Gly Arg Asp Ile Ala Asp Thr Thr Asp Ala Val
565 570 575
Arg Asp Pro Gln Thr Leu Glu Ile Leu Asp Ile Thr Pro Cys Ser Phe
580 585 590
Gly Gly Val Ser Val Ile Thr Pro Gly Thr Asn Thr Ser Asn Gln Val
595 600 605
Ala Val Leu Tyr His Gly Val Asn Cys Thr Glu Val Pro Val Ala Ile
610 615 620
His Ala Asp Gln Leu Thr Pro Thr Trp Arg Val Tyr Ser Thr Gly Ser
625 630 635 640
Asn Val Phe Gln Thr Arg Ala Gly Cys Leu Ile Gly Ala Glu His Val
645 650 655
Asn Asn Ser Tyr Glu Cys Asp Ile Pro Ile Gly Ala Gly Ile Cys Ala
660 665 670
Ser Tyr Gln Thr Gln Thr Asn Ser Pro Arg Arg Ala Arg Ser Val Ala
675 680 685
Ser Gln Ser Ile Ile Ala Tyr Thr Met Ser Leu Gly Ala Glu Asn Ser
690 695 700
Val Ala Tyr Ser His Asn Ser Ile Ala Ile Pro Thr Asn Phe Thr Ile
705 710 715 720
Ser Val Thr Thr Glu Ile Leu Pro Val Ser Met Thr Lys Thr Ser Val
725 730 735
Asp Cys Thr Met Tyr Ile Cys Gly Asp Ser Thr Glu Cys Ser Asn Leu
740 745 750
Leu Leu Gln Tyr Gly Ser Phe Cys Thr Gln Leu Asn Arg Ala Leu Thr
755 760 765
Gly Ile Ala Val Glu Gln Asp Lys Asn Thr Gln Glu Val Phe Ala Gln
770 775 780
Val Lys Gln Ile Tyr Lys Thr Pro Pro Ile Lys Asp Phe Gly Gly Phe
785 790 795 800
Asn Phe Ser Gln Ile Leu Pro Asp Pro Ser Lys Pro Ser Lys Arg Ser
805 810 815
Phe Ile Glu Asp Leu Leu Phe Asn Lys Val Thr Leu Ala Asp Ala Gly
820 825 830
Phe Ile Lys Gln Tyr Gly Asp Cys Leu Gly Asp Ile Ala Ala Arg Asp
835 840 845
Leu Ile Cys Ala Gln Lys Phe Asn Gly Leu Thr Val Leu Pro Pro Leu
850 855 860
Leu Thr Asp Glu Met Ile Ala Gln Tyr Thr Ser Ala Leu Leu Ala Gly
865 870 875 880
Thr Ile Thr Ser Gly Trp Thr Phe Gly Ala Gly Ala Ala Leu Gln Ile
885 890 895
Pro Phe Ala Met Gln Met Ala Tyr Arg Phe Asn Gly Ile Gly Val Thr
900 905 910
Gln Asn Val Leu Tyr Glu Asn Gln Lys Leu Ile Ala Asn Gln Phe Asn
915 920 925
Ser Ala Ile Gly Lys Ile Gln Asp Ser Leu Ser Ser Thr Ala Ser Ala
930 935 940
Leu Gly Lys Leu Gln Asp Val Val Asn Gln Asn Ala Gln Ala Leu Asn
945 950 955 960
Thr Leu Val Lys Gln Leu Ser Ser Asn Phe Gly Ala Ile Ser Ser Val
965 970 975
Leu Asn Asp Ile Leu Ser Arg Leu Asp Lys Val Glu Ala Glu Val Gln
980 985 990
Ile Asp Arg Leu Ile Thr Gly Arg Leu Gln Ser Leu Gln Thr Tyr Val
995 1000 1005
Thr Gln Gln Leu Ile Arg Ala Ala Glu Ile Arg Ala Ser Ala Asn
1010 1015 1020
Leu Ala Ala Thr Lys Met Ser Glu Cys Val Leu Gly Gln Ser Lys
1025 1030 1035
Arg Val Asp Phe Cys Gly Lys Gly Tyr His Leu Met Ser Phe Pro
1040 1045 1050
Gln Ser Ala Pro His Gly Val Val Phe Leu His Val Thr Tyr Val
1055 1060 1065
Pro Ala Gln Glu Lys Asn Phe Thr Thr Ala Pro Ala Ile Cys His
1070 1075 1080
Asp Gly Lys Ala His Phe Pro Arg Glu Gly Val Phe Val Ser Asn
1085 1090 1095
Gly Thr His Trp Phe Val Thr Gln Arg Asn Phe Tyr Glu Pro Gln
1100 1105 1110
Ile Ile Thr Thr Asp Asn Thr Phe Val Ser Gly Asn Cys Asp Val
1115 1120 1125
Val Ile Gly Ile Val Asn Asn Thr Val Tyr Asp Pro Leu Gln Pro
1130 1135 1140
Glu Leu Asp Ser Phe Lys Glu Glu Leu Asp Lys Tyr Phe Lys Asn
1145 1150 1155
His Thr Ser Pro Asp Val Asp Leu Gly Asp Ile Ser Gly Ile Asn
1160 1165 1170
Ala Ser Val Val Asn Ile Gln Lys Glu Ile Asp Arg Leu Asn Glu
1175 1180 1185
Val Ala Lys Asn Leu Asn Glu Ser Leu Ile Asp Leu Gln Glu Leu
1190 1195 1200
Gly Lys Tyr Glu Gln Tyr Ile Lys Trp Pro Trp Tyr Ile Trp Leu
1205 1210 1215
Gly Phe Ile Ala Gly Leu Ile Ala Ile Val Met Val Thr Ile Met
1220 1225 1230
Leu Cys Cys Met Thr Ser Cys Cys Ser Cys Leu Lys Gly Cys Cys
1235 1240 1245
Ser Cys Gly Ser Cys Cys Lys Phe Asp Glu Asp Asp Ser Glu Pro
1250 1255 1260
Val Leu Lys Gly Val Lys Leu His Tyr Thr
1265 1270
<210> 14
<211> 50
<212> DNA
<213> artificial
<220>
<223> 增强子
<400> 14
gctcggatcc ggtgtggaag ggtgtggaag ccgccaccat gttcgtgttc 50

Claims (24)

1.Spike蛋白的突变体，与SEQ ID NO：1的Spike蛋白相比，在对应于SEQ ID NO：1的第417位的位点上的氨基酸被突变为天冬氨酸；在对应于SEQ ID NO：1的第613位的位点上的氨基酸被突变为组氨酸；在对应于SEQ ID NO：1的第614位的位点上的氨基酸被突变为甘氨酸；和，在对应于SEQ ID NO：1的第709位的位点上的氨基酸被突变为组氨酸，全长如SEQ IDNO:13所示的氨基酸序列。
2.Spike蛋白的突变体，与SEQ ID NO：1的Spike蛋白相比，在对应于SEQ ID NO：1的第417位的位点上的氨基酸被突变为天冬氨酸；在对应于SEQ ID NO：1的第613位的位点上的氨基酸被突变为组氨酸；在对应于SEQ ID NO：1的第614位的位点上的氨基酸被突变为甘氨酸；和，在对应于SEQ ID NO：1的第709位的位点上的氨基酸被突变为组氨酸并在C端截短了21个氨基酸，全长如SEQ ID NO:11所示的氨基酸序列。
3.Spike蛋白的突变体，与SEQ ID NO：1的Spike蛋白相比，在对应于SEQ ID NO：1的第417位的位点上的氨基酸被突变为天冬氨酸；在对应于SEQ ID NO：1的第613位的位点上的氨基酸被突变为组氨酸；在对应于SEQ ID NO：1的第614位的位点上的氨基酸被突变为甘氨酸；和，在对应于SEQ ID NO：1的第709位的位点上的氨基酸被突变为组氨酸，在C端截短了21个氨基酸以及缺失SEQ ID NO:1的第669-672位对应的氨基酸，全长如SEQ ID NO:12所示的氨基酸序列。
4.融合蛋白，其由权利要求1-3任一项所述的Spike蛋白的突变体以及另外的多肽组成，其中，所述另外的多肽选自标签、信号肽，或者可检测的标记。
5.权利要求4所述的融合蛋白，其中，所述另外的多肽任选地通过接头连接至所述蛋白的N端或C端。
6.权利要求4所述的融合蛋白，其中，所述可检测的标记为荧光素酶(fluc)或绿色荧光蛋白(GFP)。
7.一种分离的核酸分子，其编码权利要求1-3任一项所述的Spike蛋白的突变体，或者编码权利要求5-6任一项所述的融合蛋白。
8.一种载体，其包含权利要求7所述的核酸分子。
9.权利要求8所述的载体，所述载体选自质粒，人工染色体，噬菌体或病毒载体。
10.一种宿主细胞，其包含权利要求7所述的核酸分子或权利要求8或9所述的载体。
11.权利要求10所述的宿主细胞，所述细胞为哺乳动物的细胞。
12.权利要求11所述的宿主细胞，所述哺乳动物的细胞为人的细胞。
13.权利要求10所述的宿主细胞，所述细胞为表达或过表达人ACE2蛋白的细胞。
14.权利要求10所述的宿主细胞，所述宿主细胞还包括包装质粒。
15.一种类病毒颗粒，所述类病毒颗粒含有权利要求1-3任一项所述的Spike蛋白的突变体或含有权利要求5-6任一项的融合蛋白；或者，所述类病毒颗粒由权利要求1-3任一项所述的Spike蛋白的突变体或权利要求5-6任一项的融合蛋白组成。
16.权利要求15所述的类病毒颗粒，所述类病毒颗粒还含有核酸组分。
17.权利要求16所述的类病毒颗粒，所述核酸组分为包装质粒。
18.权利要求16所述的类病毒颗粒，所述核酸组分获自VSV病毒基因组。
19.一种类病毒颗粒的制备方法，所述方法包括将权利要求8或9所述的载体和包装质粒转入宿主细胞中。
20.权利要求19所述的方法，其中，将权利要求8或9所述的载体和包装质粒通过瞬时转染或稳定转染至宿主细胞中。
21.权利要求20所述的方法，其中，所述宿主细胞为人的造血细胞，上皮细胞，肝细胞，肿瘤细胞或神经细胞。
22.权利要求20所述的方法，其中，所述类病毒颗粒感染的细胞为过表达人ACE2蛋白的细胞。
23.权利要求1-3任一项所述的Spike蛋白的突变体、权利要求4-6任一项所述的融合蛋白、权利要求7所述的分离的核酸分子、权利要求8或9所述的载体、权利要求10-14任一项所述的宿主细胞、权利要求15-18任一项所述的类病毒颗粒在制备试剂盒中的用途，所述试剂盒用于检测或筛选抗SARS-CoV-2抗体或药物的用途。
24.权利要求23所述的用途，其中，所述试剂盒用于检测SARS-CoV-2抗体的中和活性。
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