Protein Tyrosine Phosphatase 1B (PTP1B) plays a key
role in down-regulation of insulin and leptin signaling pathways. Therefore,
development of novel inhibitors of PTP1B has becoming research focus in reducing blood sugar levels for Diabetes
Mellitus and Obesity. Hence, we selected two isomer Selaginellins (1 and 2) to
explain and analyze the
binding mechanism of the two potential inhibitors against the PTP1B by molecule
docking and molecular dynamics simulations. Firstly, the two isomers (1 and 2)
and the initial ligand 19 were docked to the receptor of PTP1B by using
molecular docking technology. Secondly, taken the 19 as an indicator, molecular
dynamic (MD) simulations and molecular mechanics/generalized born surface area
(MM/GBSA) methods were requested to assess the binding affinity and complex
stability of the two chemicals towards PTP1B. Finally, we explained that the
interactions of compound 1 and 2 take up the active binding site PTP1B.
Simultaneously, energy decomposition analysis recognized several amino acid
residues situated in substrate-binding site that might provide clues for future
inhibitor exploitation towards PTP1B. In conclusion, these results may explain
the reasons of differences of optical
isomer biological activity and provide valuable information for developing
novel inhibitors targeting PTP1B-mediated glucose transport and metabolism for
Diabetes Mellitus and Obesity therapeutics.
Cite this paper
Wang, L. , Wang, Y. , Meng, D. and Li, H. (2018). Study on the Interactions of Two Isomer Selaginellins as Novel Small Molecule Inhibitors Targeting PTP1B by Docking and Molecular Dynamics Simulations. Open Access Library Journal, 5, e4277. doi: http://dx.doi.org/10.4236/oalib.1104277.
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