Patcharida Kaewmanee. Molecular Docking of Sulfolipid (SQDG) for Drug Target Identification of HSV-1. Master's Degree(Bioinformatics and Systems Biology). King Mongkut's University of Technology Thonburi. KMUTT Library. : King Mongkut's University of Technology Thonburi, 2010.
Molecular Docking of Sulfolipid (SQDG) for Drug Target Identification of HSV-1
Abstract:
This research aims to find the target protein of Herpes simplex virus type 1 (HSV-1) for
sulfolipid compound as a potent compound extracted from Spirulina platensis. The
binding of non-ionic (L1) and ionic (L2) forms of sulfo-quinovosyl-diacyl-glycerol
(major SQDG; C18:2, C16:0) structure in three target protein structures of Herpes
Simplex Virus Type 1 (HSV-1), i.e. HSV-1 DNAPolymerase (HSV-1 DNAPol);
Glycoprotein D (gD); and Thymidine kinase (TK),were investigated by molecular
docking techniques using GOLD program. The docking results show that SQDG L2
posed the highest fitness score with HSV-1 DNAPol chain B (59.13) and the binding
site 2 of gD (59.53). The interaction of each complexes mostly interact by strong
hydrogen bonding to positive charge of amino acid, i.e. arginine (Arg), was found to be
important in the binding to hydrophilic region of sulfonyl group, while amino acid
containing hydrophobic and aromatic side chain revealed the hydrophobic contact to
hydrophobic region of fatty acid chains on the sulfolipid structure. This study indicated
that DNA Pol and gD may act as target protein of major SQDG compound. To study the
other SQDG inhibition for HSV-1, seven SQDG compounds are designed based on
compound that are only found in Spirulina platensis. The structures of these compounds
are designed with different fatty acids types. The results showed that all SQDG
compound can bind to both proteins with high fitness scores. Interaction between
DNAPol and other SQDG compounds have different binding site while gD have similar
binding site when compare to the result of major SQDG compound. Since these SQDG
compounds have not been tested for HSV-1 inhibtion. Therefore, these SQDG
compound will become the candidate compounds for HSV-1 inhibition. This research
suggests candidate target protein of SQDG compounds that may be experimentally
verified in the laboratory.