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
中科院分区:
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
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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