The spike protein of SARS-CoV-2 harbours a cleavage motif for host cell proteases that is not found in closely related viruses. Peacock and colleagues show that this motif allows the virus to evade innate antiviral defences and is required for transmission.

中文翻译：

---

SARS-CoV-2 如何成功

SARS-CoV-2 的刺突蛋白含有宿主细胞蛋白酶的裂解基序，这在密切相关的病毒中没有发现。Peacock 及其同事表明，该基序允许病毒逃避先天的抗病毒防御，并且是传播所必需的。