Abstract
Empirical conformational energy functions are used to try to compute the three-dimensional structures of polypeptides and proteins. The conformational energy surfaces of such molecules have many local minima, and conventional energy minimization procedures reach only a local minimum (near the starting point of the optimization algorithm) instead of the global minimum (the multiple-minima problem). Several procedures have been developed to surmount this problem. A summary is given here of five of these methods, (i) build-up, (ii) Monte Carlo-plus- minimization (MCM), (iii) relaxation of dimensionality, (iv) pattern-recognition-based importance-sampling minimization (PRISM), and (v) the diffusion equation method which smoothes out the potential surface, leaving only the potential well containing the global minimum. These and other procedures have been applied to a variety of polypeptide structural problems. These include the computation of the structures of open-chain and cyclic peptides, fibrous proteins and globular proteins. Present efforts are being devoted to scaling up these procedures from small polypeptides to proteins, to try to compute the three-dimensional structure of a protein from its amino sequence.
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Scheraga, H.A. (1992). Conformational Energy Calculations on Polypeptides and Proteins. In: Bertrán, J. (eds) Molecular Aspects of Biotechnology: Computational Models and Theories. NATO ASI Series, vol 368. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-2538-3_1
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DOI: https://doi.org/10.1007/978-94-011-2538-3_1
Publisher Name: Springer, Dordrecht
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