Representation of protein secondary structure using bond-orientational order parameters

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Meydan, Cem and Sezerman, Uğur (2012) Representation of protein secondary structure using bond-orientational order parameters. In: 7th IAPR International Conference (PRIB 2012), Tokyo, Japan

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Abstract

Structural studies of proteins for motif mining and other pattern recognition techniques require the abstraction of the structure into simpler elements for robust matching. In this study, we propose the use of bond-orientational order parameters, a well-established metric usually employed to compare atom packing in crystals and liquids. Creating a vector of orientational order parameters of residue centers in a sliding window fashion provides us with a descriptor of local structure and connectivity around each residue that is easy to calculate and compare. To test whether this representation is feasible and applicable to protein structures, we tried to predict the secondary structure of protein segments from those descriptors, resulting in 0.99 AUC (area under the ROC curve). Clustering those descriptors to 6 clusters also yield 0.93 AUC, showing that these descriptors can be used to capture and distinguish local structural information.
Item Type: Papers in Conference Proceedings
Uncontrolled Keywords: bond-orientational order, secondary structure, machine learning, structural alphabet
Divisions: Faculty of Engineering and Natural Sciences > Academic programs > Biological Sciences & Bio Eng.
Faculty of Engineering and Natural Sciences
Depositing User: Uğur Sezerman
Date Deposited: 09 Dec 2012 22:58
Last Modified: 26 Apr 2022 09:10
URI: https://research.sabanciuniv.edu/id/eprint/21267

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