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    Diversity Indices as Measures of Functional Annotation Methods in Metagenomics Studies

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    Type
    Presentation
    Authors
    Jankovic, Boris R.
    KAUST Department
    Computational Bioscience Research Center (CBRC)
    Date
    2016-01-26
    Permanent link to this record
    http://hdl.handle.net/10754/601401
    
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    Abstract
    Applications of high-throughput techniques in metagenomics studies produce massive amounts of data. Fragments of genomic, transcriptomic and proteomic molecules are all found in metagenomics samples. Laborious and meticulous effort in sequencing and functional annotation are then required to, amongst other objectives, reconstruct a taxonomic map of the environment that metagenomics samples were taken from. In addition to computational challenges faced by metagenomics studies, the analysis is further complicated by the presence of contaminants in the samples, potentially resulting in skewed taxonomic analysis. The functional annotation in metagenomics can utilize all available omics data and therefore different methods that are associated with a particular type of data. For example, protein-coding DNA, non-coding RNA or ribosomal RNA data can be used in such an analysis. These methods would have their advantages and disadvantages and the question of comparison among them naturally arises. There are several criteria that can be used when performing such a comparison. Loosely speaking, methods can be evaluated in terms of computational complexity or in terms of the expected biological accuracy. We propose that the concept of diversity that is used in the ecosystems and species diversity studies can be successfully used in evaluating certain aspects of the methods employed in metagenomics studies. We show that when applying the concept of Hill’s diversity, the analysis of variations in the diversity order provides valuable clues into the robustness of methods used in the taxonomical analysis.
    Conference/Event name
    KAUST Research Conference on Computational and Experimental Interfaces of Big Data and Biotechnology
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    KAUST Research Conference on Computational and Experimental Interfaces of Big Data and Biotechnology, January 2016; Computational Bioscience Research Center (CBRC)

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