NDLI: Profile-Based LC-MS Data Alignment--A Bayesian Approach

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IEEE/ACM Transactions on Computational Biology and Bioinformatics (TCBB) : Volume 9

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IEEE/ACM Transactions on Computational Biology and Bioinformatics (TCBB) : Volume 1

Profile-Based LC-MS Data Alignment--A Bayesian Approach

Content Provider	ACM Digital Library
Author	Wang, Yue Tadesse, Mahlet G. Ressom, Habtom W. Tsai, Tsung-Heng
Abstract	A Bayesian alignment model (BAM) is proposed for alignment of liquid chromatography-mass spectrometry (LC-MS) data. BAM belongs to the category of profile-based approaches, which are composed of two major components: a prototype function and a set of mapping functions. Appropriate estimation of these functions is crucial for good alignment results. BAM uses Markov chain Monte Carlo (MCMC) methods to draw inference on the model parameters and improves on existing MCMC-based alignment methods through 1) the implementation of an efficient MCMC sampler and 2) an adaptive selection of knots. A block Metropolis-Hastings algorithm that mitigates the problem of the MCMC sampler getting stuck at local modes of the posterior distribution is used for the update of the mapping function coefficients. In addition, a stochastic search variable selection (SSVS) methodology is used to determine the number and positions of knots. We applied BAM to a simulated data set, an LC-MS proteomic data set, and two LC-MS metabolomic data sets, and compared its performance with the Bayesian hierarchical curve registration (BHCR) model, the dynamic time-warping (DTW) model, and the continuous profile model (CPM). The advantage of applying appropriate profile-based retention time correction prior to performing a feature-based approach is also demonstrated through the metabolomic data sets.
Starting Page	494
Ending Page	503
Page Count	10
File Format	PDF
ISSN	15455963
DOI	10.1109/TCBB.2013.25
Volume Number	10
Issue Number	2
Journal	IEEE/ACM Transactions on Computational Biology and Bioinformatics (TCBB)
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2013-03-01
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Stochastic search variable selection (SSVS),Alignment,Bayesian inference,block Metropolis-Hastings algorithm,liquid chromatography-mass spectrometry (LC-MS),Markov chain Monte Carlo (MCMC)
Content Type	Text
Resource Type	Article
Subject	Genetics Biotechnology Applied Mathematics

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