In Silico Screening of Aptamers Configuration against Hepatitis B Surface Antigen

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ID: 7720
2019
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Abstract
Aptamer has been long studied as a substitute of antibodies for many purposes. However, due to the exceeded length of the aptamers obtained in vitro, difficulties arise in its manipulation during its molecular conjugation on the matrix surfaces. Current study focuses on computational improvement for aptamers screening of hepatitis B surface antigen (HBsAg) through optimization of the length sequences obtained from SELEX. Three original aptamers with affinity against HBsAg were truncated into five short hairpin structured aptamers and their affinity against HBsAg was thoroughly studied by molecular docking, molecular dynamics (MD) simulation, and Molecular Mechanics Poisson-Boltzmann Surface Area (MMPBSA) method. The result shows that truncated aptamers binding on HBsAg “a” determinant region are stabilized by the dynamic H-bond formation between the active binding residues and nucleotides. Amino acids residues with the highest hydrogen bonds hydrogen bond interactions with all five aptamers were determined as the active binding residues and further characterized. The computational prediction of complexes binding will include validations through experimental assays in future studies. Current study will improve the current in vitro aptamers by minimizing the aptamer length for its easy manipulation.
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Authors Sabri, Mohamad Zulkeflee;Abdul Hamid, Azzmer Azzar;Sayed Hitam, Sharifah Mariam;Abdul Rahim, Mohd. Zulkhairi;Sabri, Mohamad Zulkeflee;Abdul Hamid, Azzmer Azzar;Sayed Hitam, Sharifah Mariam;Abdul Rahim, Mohd. Zulkhairi;
Journal advances in bioinformatics
Year 2019
DOI
10.1155/2019/6912914
URL
https://www.hindawi.com/journals/abi/2019/6912914/abs/
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