An ACE2 Microbody Containing a Single Immunoglobulin Fc Domain Is a Potent Inhibitor of SARS-CoV-2.

An ACE2 Microbody Containing a Single Immunoglobulin Fc Domain Is a Potent Inhibitor of SARS-CoV-2.
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含有单个免疫球蛋白Fc结构域的ACE 2微体是SARS-CoV-2的有效抑制剂。

DOI:
10.1016/j.celrep.2020.108528
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发表时间:
2020-12-22
期刊:
影响因子:
8.8
通讯作者:
Landau NR
Landau NR
中科院分区:
生物学1区
文献类型:
--
作者:
Tada T;Fan C;Chen JS;Kaur R;Stapleford KA;Gristick H;Dcosta BM;Wilen CB;Nimigean CM;Landau NR

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血管紧张素转换酶2 (ACE2)的可溶性形式最近被证明可以抑制严重急性呼吸综合征冠状病毒2 (SARS-CoV-2)感染。我们报道了一种改进的可溶性ACE2,称为“微体”,其中ACE2外结构域融合到免疫球蛋白(Ig)重链的Fc结构域3。该蛋白比先前描述的ACE2- ig Fc融合蛋白小,并且在ACE2催化活性位点含有H345A突变,该突变可使酶失活,但不会降低其对SARS-CoV-2刺突的亲和力。二硫化物结合ACE2微体蛋白在体外和小鼠模型中抑制SARS-CoV-2刺突蛋白假型病毒的进入和活体SARS-CoV-2的复制。其效价比可溶性ACE2高10倍,病毒与细胞结合后可起作用。微体抑制β冠状病毒和变异D614G刺突病毒的进入。ACE2微体可能是一种有价值的治疗2019冠状病毒病(COVID-19)的药物,它对病毒变体和未来的冠状病毒有活性。Tada等人生成了一个ACE2“微体”,其中ACE2外结构域与免疫球蛋白重链Fc结构域3融合。ACE2微体蛋白在体外和小鼠模型中有效抑制SARS-CoV-2刺突蛋白假型病毒进入细胞和活体SARS-CoV-2的复制。
Soluble forms of angiotensin-converting enzyme 2 (ACE2) have recently been shown to inhibit severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection. We report on an improved soluble ACE2, termed a “microbody,” in which the ACE2 ectodomain is fused to Fc domain 3 of the immunoglobulin (Ig) heavy chain. The protein is smaller than previously described ACE2-Ig Fc fusion proteins and contains an H345A mutation in the ACE2 catalytic active site that inactivates the enzyme without reducing its affinity for the SARS-CoV-2 spike. The disulfide-bonded ACE2 microbody protein inhibits entry of SARS-CoV-2 spike protein pseudotyped virus and replication of live SARS-CoV-2 in vitro and in a mouse model. Its potency is 10-fold higher than soluble ACE2, and it can act after virus bound to the cell. The microbody inhibits the entry of β coronaviruses and virus with the variant D614G spike. The ACE2 microbody may be a valuable therapeutic for coronavirus disease 2019 (COVID-19) that is active against viral variants and future coronaviruses. Tada et al. generate an ACE2 “microbody” in which the ACE2 ectodomain is fused to immunoglobulin heavy chain Fc domain 3. The ACE2 microbody protein potently inhibits the entry of SARS-CoV-2 spike protein pseudotyped virus into cells and replication of live SARS-CoV-2 in vitro and in a mouse model.
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