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Deprecated: Implicit conversion from float 231.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Science 2021 ; 373 (6555): 648-654 Nephropedia Template TP
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SARS-CoV-2 immune evasion by the B 1 427/B 1 429 variant of concern #MMPMID34210893
McCallum M; Bassi J; De Marco A; Chen A; Walls AC; Di Iulio J; Tortorici MA; Navarro MJ; Silacci-Fregni C; Saliba C; Sprouse KR; Agostini M; Pinto D; Culap K; Bianchi S; Jaconi S; Cameroni E; Bowen JE; Tilles SW; Pizzuto MS; Guastalla SB; Bona G; Pellanda AF; Garzoni C; Van Voorhis WC; Rosen LE; Snell G; Telenti A; Virgin HW; Piccoli L; Corti D; Veesler D
Science 2021[Aug]; 373 (6555): 648-654 PMID34210893show ga
A novel variant of concern (VOC) named CAL.20C (B.1.427/B.1.429), which was originally detected in California, carries spike glycoprotein mutations S13I in the signal peptide, W152C in the N-terminal domain (NTD), and L452R in the receptor-binding domain (RBD). Plasma from individuals vaccinated with a Wuhan-1 isolate-based messenger RNA vaccine or from convalescent individuals exhibited neutralizing titers that were reduced 2- to 3.5-fold against the B.1.427/B.1.429 variant relative to wild-type pseudoviruses. The L452R mutation reduced neutralizing activity in 14 of 34 RBD-specific monoclonal antibodies (mAbs). The S13I and W152C mutations resulted in total loss of neutralization for 10 of 10 NTD-specific mAbs because the NTD antigenic supersite was remodeled by a shift of the signal peptide cleavage site and the formation of a new disulfide bond, as revealed by mass spectrometry and structural studies.