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OJBTM
Online Journal of Bioinformatics ©
Established
1995
ISSN 1443-2250
Volume 24 (2):65-73, 2023.
In silico Staphylococcus aureus vaccine
epitopes.
Garima Bajetha, Sarika
Anil Rai.
Agricultural
Bioinformatics, Indian Agriculture Statistics Research Institute (I.C.A.R) Library
Avenue, Pusa Campus New Delhi- India.
ABSTRACT
Bajetha G, Anil Rai S., In
silico Staphylococcus aureus vaccine epitopes, Onl J Bioinform, 24 (2):65-73, 2023. Staphylococcus aureus adherence
to extracellular matrix and plasma proteins enhances infections by orthopaedic-devices.
We report in silico peptide vaccine without adhesion protein sequence,
structure, QSAR and protein fold for B- and T-cell epitopes. We found IRKLGVGIA
from Immunoglobulin G-binding protein A, IEFLEVVGL from Conserved virulence
factor B IISLGALAVASS from Staphylocoagulase and LLVIRTKGTIA
from Alpha-Hemolysin] to induce antigenicity with potential
to bind HLA alleles DRB1*0101, and DRB1*0401). In
silico exo-membrane antigenicity ranged for staphylocoagulase 0.8080 to conserved virulence factor B only
0.4189. For amino acid (aa) topology, conserved
virulence factor B 1-300aa, staphylocoagulase 1-658aa
and alpha-hemolysin 1-319aa were fully exposed to outer
membrane. Exo-membrane for immunoglobulin
G-binding protein A was 35-450aa. MHC Class-I binding scores for protective
epitope antigens at 4% threshold with Staphylocoagulase
2.4058, 2.3893 for immunoglobulin G-binding protein A,
2.3246 for alpha-hemolysin and 1.3765 for conserved
virulence factor B. For quantitative structure–activity relationship, IC50 and
antigenicity we selected DRB1*0101 and DRB1*0401 TTHADGTAT from Staphylocoagulase for vaccine.
Key words: - Staphylococcus aureus, Epitope,
Mastitis, vaccine designing, Immune response.
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