Evidence map›Paper›PMID 34425281›Full record

ArticleBiochemical and biophysical research communications2021

Mutation-induced changes in the receptor-binding interface of the SARS-CoV-2 Delta variant B.1.617.2 and implications for immune evasion.

Prabin Baral, Nisha Bhattarai, Md Lokman Hossen, Vitalii Stebliankin, Bernard S Gerstman, Giri Narasimhan, Prem P Chapagain

Abstract read
In one paragraph

Article in Biochemical and biophysical research communications, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 53 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
53citing papers in PubMed, 2 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

53 citing papers in PubMed, 2 syntheses or guidelines pooled it.

  1. COVID-19 pandemic: the delta variant, T-cell responses, and the efficacy of developing vaccines.Inflammation research : official journal of the European Histamine Research Society ... [et al.] · 2022
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  12. Transboundary and emerging diseases · 2024
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors.

Prabin BaralDepartment of Physics, Florida International University, Miami, FL, 33199, USA.
Nisha BhattaraiDepartment of Physics, Florida International University, Miami, FL, 33199, USA.
Md Lokman HossenDepartment of Physics, Florida International University, Miami, FL, 33199, USA.
Vitalii StebliankinBioinformatics Research Group (BioRG), Knight Foundation School of Computing and Information Sciences, Florida International University, Miami, FL, 33199, USA.
Bernard S GerstmanDepartment of Physics, Florida International University, Miami, FL, 33199, USA; Biomolecular Sciences Institute, Florida International University, Miami, FL, 33199, USA.
Giri NarasimhanBioinformatics Research Group (BioRG), Knight Foundation School of Computing and Information Sciences, Florida International University, Miami, FL, 33199, USA; Biomolecular Sciences Institute, Florida International University, Miami, FL, 33199, USA.
Prem P ChapagainDepartment of Physics, Florida International University, Miami, FL, 33199, USA; Biomolecular Sciences Institute, Florida International University, Miami, FL, 33199, USA. Electronic address: chapagap@fiu.edu.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Following the initial surges of the Alpha (B.1.1.7) and the Beta (B.1.351) variants, a more infectious Delta variant (B.1.617.2) is now surging, further deepening the health crises caused by the pandemic. The sharp rise in cases attributed to the Delta variant has made it especially disturbing and is a variant of concern. Fortunately, current vaccines offer protection against known variants of concern, including the Delta variant. However, the Delta variant has exhibited some ability to dodge the immune system as it is found that neutralizing antibodies from prior infections or vaccines are less receptive to binding with the Delta spike protein. Here, we investigated the structural changes caused by the mutations in the Delta variant's receptor-binding interface and explored the effects on binding with the ACE2 receptor as well as with neutralizing antibodies. We find that the receptor-binding β-loop-β motif adopts an altered but stable conformation causing separation in some of the antibody binding epitopes. Our study shows reduced binding of neutralizing antibodies and provides a possible mechanism for the immune evasion exhibited by the Delta variant.

Indexed as

Amino AcidsAngiotensin-Converting Enzyme 2Antibodies, ViralBinding SitesCOVID-19HumansImmune EvasionMolecular Dynamics SimulationMutationNeutralization TestsProtein BindingProtein DomainsSARS-CoV-2Spike Glycoprotein, CoronavirusACE2 protein, humanAmino AcidsAngiotensin-Converting Enzyme 2Antibodies, ViralSpike Glycoprotein, CoronavirusAntibody bindingDelta variant B.1.617.2Immune escapeMolecular dynamicsSARS-CoV-2 variants

Identifiers

PMID34425281
PMCPMC8364676

What OpenQuestion holds

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.