Driven by a steady improvement of computational hardware and significant progress in ab initio method development,
quantum-mechanical approaches can now be applied to large biochemical systems and drug design. We review
the methods implemented in GAMESS, which are suitable to calculate large biochemical systems. An emphasis is put on
the fragment molecular orbital method (FMO) and quantum mechanics interfaced with molecular mechanics (QM/MM).
The use of FMO in the protein-ligand binding, structure-activity relationship (SAR) studies, fragment- and structure-based
drug design (FBDD/SBDD) is discussed in detail.
Keywords: Quantum chemistry, fragment molecular orbital, drug design, ab initio, GAMESS, FMO, QM/MM, FBDD, SBDD.
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