NDLI: Towards biophysical validation of constraint modeling for rigidity analysis of proteins

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Towards biophysical validation of constraint modeling for rigidity analysis of proteins

Content Provider	ACM Digital Library
Author	Jagodzinski, Filip Streinu, Ileana
Abstract	Proteins are dynamic molecules, and understanding how they flex and bend provides fundamental insights to their functions. Methods such as molecular dynamics are computationally expensive, and can simulate protein motions on limited timescales. Rigidity analysis is an alternative method, in which a protein structure is analyzed to infer which portions of the molecule are flexible. To perform rigidity analysis, a model is first constructed in which various inter-atomic stabilizing interactions are modeled according to their strength. No detailed study has been conducted as to what is the most plausible, chemically validated modeling scheme. All previous implementations have relied on heuristics, which allowed for extracting relevant observations but only for a very limited set of proteins. We used our recently released KINARI-Web server for protein rigidity analysis to systematically vary how stabilizing interactions are modeled. Computational experiments that vary how hydrogen bonds and hydrophobic interactions are modeled to test which of them gives rigidity results that best correlate with experimental data has not been performed until this study. We collected a dataset of 159 Protein Data Bank files representing the wild-type and 158 variants of Lysozyme from bacteriophage T4, for which we retrieved experimentally derived stability data from the literature. We present here a systematic study seeking a possible correlation between some rigidity parameters and this experimental data. In particular, we compare rigidity results obtained from several methods for modeling interatomic interactions.
Starting Page	408
Ending Page	413
Page Count	6
File Format	PDF
ISBN	9781450316705
DOI	10.1145/2382936.2382988
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2012-10-07
Publisher Place	New York
Access Restriction	Subscribed
Subject Keyword	Biological validation Rigidity analysis Protein modeling
Content Type	Text
Resource Type	Article

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