Development of functional anti-Gn nanobodies specific for SFTSV based on next generation sequencing and proteomics

ABSTRACT: Severe fever with thrombocytopenia syndrome (SFTS) is an acute infectious disease caused by novel bunyavirus (SFTSV), with a mortality rate of 6.3% ~ 30%. To date, there is no specific treatment for SFTS. Previously, our studies demonstrate that SFTSV surface glycoprotein (Glycoprotein N, Gn) is a potential target for the development of SFTS vaccine or therapeutic antibodies, and anti-Gn neutralizing antibodies play a protective role in SFTS infection. Compared with traditional antibodies, nanobodies from camelids have various advantages including small molecular weight, high affinity, low immunogenicity and convenient production by gene engineering, etc. In this study, we combined next generation sequencing (NGS) with proteomics technology and bioinformatics analysis to high-throughput screen monoclonal anti-Gn nanobodies from camel immunized with Gn protein. We identified 19 anti-Gn monoclonal nanobody sequences, and selected 6 of them for recombinant protein expression and purification. Among these 6 anti-Gn nanobodies, nanobody 57493 was validated to be highly specific for Gn.

INSTRUMENT(S): TripleTOF 5600

ORGANISM(S): Camelidae

TISSUE(S): Blood Serum

SUBMITTER: Lei Fang  

LAB HEAD: Lei Fang

PROVIDER: PXD032731 | Pride | 2024-01-26

REPOSITORIES: Pride