Open Access
Open access
PLoS Computational Biology, volume 5, issue 3, pages e1000307

Probabilistic Interaction Network of Evidence Algorithm and its Application to Complete Labeling of Peak Lists from Protein NMR Spectroscopy

Bahrami Arash 1
Assadi Amir H. 2
Markley John L. 1
Eghbalnia Hamid R 1
1
 
National Magnetic Resonance Facility at Madison, Biochemistry Department, University of Wisconsin Madison, Madison, Wisconsin, United States of America,
2
 
Mathematics Department, University of Wisconsin Madison, Madison, Wisconsin, United States of America
Publication typeJournal Article
Publication date2009-03-13
Quartile SCImago
Q1
Quartile WOS
Q1
Impact factor4.3
ISSN1553734X, 15537358
Molecular Biology
Genetics
Computational Theory and Mathematics
Cellular and Molecular Neuroscience
Ecology, Evolution, Behavior and Systematics
Ecology
Modeling and Simulation
Abstract
The process of assigning a finite set of tags or labels to a collection of observations, subject to side conditions, is notable for its computational complexity. This labeling paradigm is of theoretical and practical relevance to a wide range of biological applications, including the analysis of data from DNA microarrays, metabolomics experiments, and biomolecular nuclear magnetic resonance (NMR) spectroscopy. We present a novel algorithm, called Probabilistic Interaction Network of Evidence (PINE), that achieves robust, unsupervised probabilistic labeling of data. The computational core of PINE uses estimates of evidence derived from empirical distributions of previously observed data, along with consistency measures, to drive a fictitious system M with Hamiltonian H to a quasi-stationary state that produces probabilistic label assignments for relevant subsets of the data. We demonstrate the successful application of PINE to a key task in protein NMR spectroscopy: that of converting peak lists extracted from various NMR experiments into assignments associated with probabilities for their correctness. This application, called PINE-NMR, is available from a freely accessible computer server (http://pine.nmrfam.wisc.edu). The PINE-NMR server accepts as input the sequence of the protein plus user-specified combinations of data corresponding to an extensive list of NMR experiments; it provides as output a probabilistic assignment of NMR signals (chemical shifts) to sequence-specific backbone and aliphatic side chain atoms plus a probabilistic determination of the protein secondary structure. PINE-NMR can accommodate prior information about assignments or stable isotope labeling schemes. As part of the analysis, PINE-NMR identifies, verifies, and rectifies problems related to chemical shift referencing or erroneous input data. PINE-NMR achieves robust and consistent results that have been shown to be effective in subsequent steps of NMR structure determination.

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Bahrami A. et al. Probabilistic Interaction Network of Evidence Algorithm and its Application to Complete Labeling of Peak Lists from Protein NMR Spectroscopy // PLoS Computational Biology. 2009. Vol. 5. No. 3. p. e1000307.
GOST all authors (up to 50) Copy
Bahrami A., Assadi A. H., Markley J. L., Eghbalnia H. R. Probabilistic Interaction Network of Evidence Algorithm and its Application to Complete Labeling of Peak Lists from Protein NMR Spectroscopy // PLoS Computational Biology. 2009. Vol. 5. No. 3. p. e1000307.
RIS |
Cite this
RIS Copy
TY - JOUR
DO - 10.1371/journal.pcbi.1000307
UR - https://doi.org/10.1371%2Fjournal.pcbi.1000307
TI - Probabilistic Interaction Network of Evidence Algorithm and its Application to Complete Labeling of Peak Lists from Protein NMR Spectroscopy
T2 - PLoS Computational Biology
AU - Bahrami, Arash
AU - Assadi, Amir H.
AU - Markley, John L.
AU - Eghbalnia, Hamid R
PY - 2009
DA - 2009/03/13 00:00:00
PB - Public Library of Science (PLoS)
SP - e1000307
IS - 3
VL - 5
PMID - 19282963
SN - 1553-734X
SN - 1553-7358
ER -
BibTex |
Cite this
BibTex Copy
@article{2009_Bahrami,
author = {Arash Bahrami and Amir H. Assadi and John L. Markley and Hamid R Eghbalnia},
title = {Probabilistic Interaction Network of Evidence Algorithm and its Application to Complete Labeling of Peak Lists from Protein NMR Spectroscopy},
journal = {PLoS Computational Biology},
year = {2009},
volume = {5},
publisher = {Public Library of Science (PLoS)},
month = {mar},
url = {https://doi.org/10.1371%2Fjournal.pcbi.1000307},
number = {3},
pages = {e1000307},
doi = {10.1371/journal.pcbi.1000307}
}
MLA
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MLA Copy
Bahrami, Arash, et al. “Probabilistic Interaction Network of Evidence Algorithm and its Application to Complete Labeling of Peak Lists from Protein NMR Spectroscopy.” PLoS Computational Biology, vol. 5, no. 3, Mar. 2009, p. e1000307. https://doi.org/10.1371%2Fjournal.pcbi.1000307.
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