Differences in Presentation of SARS-CoV-2 Omicron Strain Variant BA.1-BA.5 Peptides by HLA Molecules.
Dokl Biochem Biophys
; 507(1): 298-301, 2022 Dec.
Article
in English
| MEDLINE | ID: covidwho-2243723
ABSTRACT
In this work, we analyzed the binding affinities of mutated peptides of Omicron strain variants BA.1-BA.5 and the worldwide prevalent HLA alleles. Bioinformatics analysis was conducted with the use of T-CoV web portal. We showed that, for all five viral variants, mutations cause a significant reduction in the number of tightly binding peptides for HLA-B*0702 and HLA-C*0102 molecules. At the same time, there were novel potential mutant epitopes (binding affinity less than 50 nM) in case of HLA-A*3201 allele. Interestingly, mutations caused multidirectional effect on the binding affinities of the viral peptides and HLA-DRB1*0301. Specifically, Spike protein mutations in the BA.1 variant caused more than 100-fold decrease in PINLVRDLPQGFSAL binding affinity, 10-fold decrease in affinity in the case of BA.2, BA.4, and BA.5 variants, and 30% increase in affinity for the BA.3 variant.
Keywords
Full text:
Available
Collection:
International databases
Database:
MEDLINE
Main subject:
COVID-19
Topics:
Variants
Limits:
Humans
Language:
English
Journal:
Dokl Biochem Biophys
Journal subject:
Biophysics
/
Biochemistry
Year:
2022
Document Type:
Article
Affiliation country:
S1607672922060084
Similar
MEDLINE
...
LILACS
LIS