Hypercholesterolemia and atherosclerosis are critical health risk factors, mainly caused by uncontrolled cholesterol  biosynthesis. At present, statins are used for the treatment of hypercholesterolemia. One of the statins (atorvastatin) and its analogues are evaluated with the yeast system, decided on the basis of BLASTP studies. Different analogues were designed and analyzed for drug-likeness. This is followed by prediction of molecular properties of the compounds under study. The compounds were subjected to docking. Inhibition studies with the drugs revealed that all of them inhibit yeast HMGR in the   competitive way. Certain thermodynamic parameters (enthalpy, entropy, Gibb's free energy, and activation energy) were estimated to understand the folding/defolding of the protein.

Key words: Biosynthesis, Thermodynamic Parameters, BLASTP Studies