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| Content Provider | ACM Digital Library |
|---|---|
| Author | Leaver-Fay, Andrew Liu, Yuanxin Snoeyink, Jack Wang, Xueyi |
| Copyright Year | 2008 |
| Abstract | M. Word and coauthors from the Richardsons' 3D Protein Structure laboratory at Duke University propose dot scores to measure interatomic interactions in molecular structures. Their program REDUCE uses these scores in a brute-force search to solve instances of the $\textit{NP}-hard$ problem of finding the optimal placement of hydrogen atoms in molecular structures determined by X-ray crystallography. We capture the central combinatorial optimization in the hydrogen placement problem with an abstraction that we call an interaction (hyper)graph. REDUCE's dot-based scoring function cannot be decomposed into the sum of pair interactions, but because the function is short ranged we are able to decompose it into the sum of single, pair, triple, and quadruple interactions that we represent by graph hyperedges. Almost every interaction graph we have observed has had a small treewidth. This fact allows us to replace the brute-force search by dynamic programming, giving speedups of nearly ten orders of magnitude. This dynamic programming has been incorporated into REDUCE and is available for download. |
| Starting Page | 1 |
| Ending Page | 16 |
| Page Count | 16 |
| File Format | |
| ISSN | 10846654 |
| e-ISSN | 10846654 |
| DOI | 10.1145/1227161.1227167 |
| Journal | Journal of Experimental Algorithmics (JEA) |
| Volume Number | 12 |
| Language | English |
| Publisher | Association for Computing Machinery (ACM) |
| Publisher Date | 2008-06-12 |
| Publisher Place | New York |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Dynamic programming Hard-sphere model Hydrogen bonds Hydrogen placement Protein structure Treewidth |
| Content Type | Text |
| Resource Type | Article |
| Subject | Theoretical Computer Science |
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