Molecular basis of immune evasion by the Delta and Kappa SARS-CoV-2 variants.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 34751595.
- Also identified by DOI 10.1126/science.abl8506 and PMC identifier 12240541.
- Licence recorded as CC BY.
- The licence permits redistribution, so the abstract is shown in full and the full text is available from the publisher.
Abstract
Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) transmission leads to the emergence of variants, including the B.1.617.2 (Delta) variant of concern that is causing a new wave of infections and has become globally dominant. We show that these variants dampen the in vitro potency of vaccine-elicited serum neutralizing antibodies and provide a structural framework for describing their immune evasion. Mutations in the B.1.617.1 (Kappa) and Delta spike glycoproteins abrogate recognition by several monoclonal antibodies via alteration of key antigenic sites, including remodeling of the Delta amino-terminal domain. The angiotensin-converting enzyme 2 binding affinities of the Kappa and Delta receptor binding domains are comparable to the Wuhan-Hu-1 isolate, whereas B.1.617.2+ (Delta+) exhibits markedly reduced affinity.
Medical subject headings
- COVID-19 Vaccines
- Immune Evasion
- SARS-CoV-2
- Spike Glycoprotein, Coronavirus