Genomics Journals | OMICS International | Human Genetics And Embryology

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"A large number of genes in an organism cannot be functionally annotated using sequence genomics techniques alone. We present a metabolomics based biomarker discovery pipeline that uses single gene knock out mutants under strictly controlled environmental conditions to discover gene function. Since no single metabolomics detection platform can cover the whole metabolome of an organism, seven different mass spectrometry based metabolomics platforms are combined together to get a more comprehensive view of the mutation. Many potential biomarkers in a non-targeted analysis are structurally unknown and cannot be used in understanding the biological relevance. Partial correlation networks between the metabolites across multiple mutation lines provide a way to computationally predict and incorporate the structurally unknown metabolic features. A proof-of-concept analysis on the three single gene knock mutants in the glutathione degradation (GSH) pathway of the Arabidopsis confirms the known biology that OXP1 is responsible for conversion of 5 oxoproline (5 OP) to glutamic acid like the mammals but GGTs may not be major contributors for the 5OP production in Arabidopsis plant as they are in the animals. This project is innovative because it harnesses the stable relationship between two metabolites across multiple mutations for a rapid and inexpensive in-silico method to predict the structures of unknown metabolites to form hypothesis about the function of a gene. Preeti Bais, Biomarker discovery in functional genomics using metabolomics "
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Last date updated on May, 2021