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Deprecated: Implicit conversion from float 267.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Cell+Rep 2020 ; 33 (4): 108322 Nephropedia Template TP
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Structure-Based Design with Tag-Based Purification and In-Process Biotinylation Enable Streamlined Development of SARS-CoV-2 Spike Molecular Probes #MMPMID33091382
Zhou T; Teng IT; Olia AS; Cerutti G; Gorman J; Nazzari A; Shi W; Tsybovsky Y; Wang L; Wang S; Zhang B; Zhang Y; Katsamba PS; Petrova Y; Banach BB; Fahad AS; Liu L; Lopez Acevedo SN; Madan B; Oliveira de Souza M; Pan X; Wang P; Wolfe JR; Yin M; Ho DD; Phung E; DiPiazza A; Chang LA; Abiona OM; Corbett KS; DeKosky BJ; Graham BS; Mascola JR; Misasi J; Ruckwardt T; Sullivan NJ; Shapiro L; Kwong PD
Cell Rep 2020[Oct]; 33 (4): 108322 PMID33091382show ga
Biotin-labeled molecular probes, comprising specific regions of the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) spike, would be helpful in the isolation and characterization of antibodies targeting this recently emerged pathogen. Here, we design constructs incorporating an N-terminal purification tag, a site-specific protease-cleavage site, the probe region of interest, and a C-terminal sequence targeted by biotin ligase. Probe regions include full-length spike ectodomain as well as various subregions, and we also design mutants that eliminate recognition of the angiotensin-converting enzyme 2 (ACE2) receptor. Yields of biotin-labeled probes from transient transfection range from approximately 0.5 mg/L for the complete ectodomain to >5 mg/L for several subregions. Probes are characterized for antigenicity and ACE2 recognition, and the structure of the spike ectodomain probe is determined by cryoelectron microscopy. We also characterize antibody-binding specificities and cell-sorting capabilities of the biotinylated probes. Altogether, structure-based design coupled to efficient purification and biotinylation processes can thus enable streamlined development of SARS-CoV-2 spike ectodomain probes.