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Broad neutralizing nanobody against SARS-CoV-2 engineered from pre-designed synthetic library
Preprint
in English
| bioRxiv
| ID: ppbiorxiv-455523
ABSTRACT
SARS-CoV-2 infection is initiated with Spike glycoprotein binding to the receptor of human angiotensin converting enzyme 2 via its receptor binding domain. Blocking this interaction is considered as an effective approach to inhibit virus infection. Here we report the discovery of a neutralizing nanobody, VHH60, directly produced from a humanized synthetic nanobody library. VHH60 competes with human ACE2 to bind the receptor binding domain of the Spike protein with a KD of 2.56 nM, inhibits infections of both live SARS-CoV-2 and pseudotyped viruses harboring wildtype, escape mutations and prevailing variants at nanomolar level. VHH60 also suppresses SARS-CoV-2 infection and propagation 50-fold better and protects mice from death two times longer than that of control group after live virus inoculation on mice. VHH60 therefore is a powerful synthetic nanobody with a promising profile for disease control against COVID19.
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Full text:
Available
Collection:
Preprints
Database:
bioRxiv
Type of study:
Experimental_studies
Language:
English
Year:
2021
Document type:
Preprint
