Abstract
Structure and analog based analysis of 3D-QSAR, CoMFA and CoMSIA, along with different docking protocols were used to evaluate the structure activity relationship of 26 analogues of 1-aryl sulfamido-2-alkyl piperazines to model the activities of group I and II secreted phospholipases A2 (sPLA2s) and probe into the chemical space and nature of receptor — ligand interactions. The best CoMFA model yields cross-validated (q2) and conventional correlation coefficients (r2) of 0.703 and 0.962 respectively whereas CoMSIA model yields q2 and r2 values of 0.408 and 0.922 respectively, followed by docking analysis using FlexX and GOLD methodologies on the X-ray structure of human and bovine PLA2s. A comparative study was made to find out the differences in the active site residues of both PLA2s. The information enunciated from the analysis of CoMFA and CoMSIA maps and docking results were analyzed and employed in the design of 29 new ligands using molecules 4, 21, 22 from the initial set as templates. New ligands for group I and II secreted phospholipases A2 (sPLA2s) have been thus designed based on the 32 analogues of 1-aryl sulfamido-2-alkyl piperazine with a cursory note on its synthetic feasibility. Molecular modeling studies indicate that the newly designed ligands are expected to show high affinity and experimental efforts in this direction is highly rewarding.
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Department of Biotechnology (DBT), New Delhi is thanked for the financial support. DST is thanked for the women scientist award to PB and Swarnajayanthi Fellowship to GNS.
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Badrinarayan, P., Srivani, P. & Narahari Sastry, G. Design of 1-arylsulfamido-2-alkylpiperazine derivatives as secreted PLA2 inhibitors. J Mol Model 17, 817–831 (2011). https://doi.org/10.1007/s00894-010-0752-2
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DOI: https://doi.org/10.1007/s00894-010-0752-2