Computer Science – Artificial Intelligence
Scientific paper
2010-07-29
Theory and Practice of Logic Programming, special issue dedicated to ICLP 2010. 10(4-6): pp 709-724, July 2010
Computer Science
Artificial Intelligence
special issue dedicated to ICLP 2010
Scientific paper
10.1017/S1471068410000372
The paper investigates a novel approach, based on Constraint Logic Programming (CLP), to predict the 3D conformation of a protein via fragments assembly. The fragments are extracted by a preprocessor-also developed for this work- from a database of known protein structures that clusters and classifies the fragments according to similarity and frequency. The problem of assembling fragments into a complete conformation is mapped to a constraint solving problem and solved using CLP. The constraint-based model uses a medium discretization degree Ca-side chain centroid protein model that offers efficiency and a good approximation for space filling. The approach adapts existing energy models to the protein representation used and applies a large neighboring search strategy. The results shows the feasibility and efficiency of the method. The declarative nature of the solution allows to include future extensions, e.g., different size fragments for better accuracy.
Dovier Agostino
Fogolari Federico
Palu' Alessandro Dal
Pontelli Enrico
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