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Updated: Sep 9, 2025
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Stable Isotopic Profiling of Intermediary Metabolic Flux in Developing and Adult Stage Caenorhabditis elegans
Published on: February 27, 2011
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Inverse stable isotope probing-metabolomics (InverSIP) identifies an iron acquisition system in a methane-oxidizing
Jose Miguel D Robes1,2, Tashi C E Liebergesell1,2, Delaney G Beals1,2
1Department of Chemistry, University of Utah, Salt Lake City, UT 84112.
Summary
Researchers uncovered a novel molecule, methylocystabactin, produced by methane-oxidizing bacteria. This compound aids in iron acquisition, crucial for methane sequestration and climate change mitigation efforts.
Area of Science:
- Microbial Ecology
- Biogeochemistry
- Genomics
Background:
- Methane is a potent greenhouse gas targeted for climate change mitigation.
- Methane sequestration relies on microbial communities, but their interactions and metabolic functions are poorly understood.
- Linking genomic data to metabolic interactions in microbial communities is challenging.
Purpose of the Study:
- To develop and apply a novel technique, inverse stable isotope probing-metabolomics (InverSIP), to bridge the gap between metagenomic and metabolomic data.
- To functionally characterize interactions within a complex methane-oxidizing microbial community.
- To identify the secondary metabolite produced by a highly transcribed gene cluster and its role in community dynamics.
Main Methods:
- Development and application of inverse stable isotope probing-metabolomics (InverSIP).
- Metagenomic and metabolomic analyses of a methane-oxidizing microbial community.
- Functional assays to assess the role of identified metabolites in microbial growth and enzyme activity.
Main Results:
- InverSIP successfully linked a gene cluster to its product, methylocystabactin, a novel triscatecholate siderophore.
- Methylocystabactin production is common among methanotrophic alphaproteobacteria and can be utilized by other community members.
- Methylocystabactin supports methanotroph growth and soluble methane monooxygenase activity under iron-limited conditions.
Conclusions:
- Methylocystabactin establishes a molecular link between methane oxidation and iron availability in natural environments.
- This study highlights the importance of siderophores in mediating microbial interactions and nutrient cycling.
- InverSIP is a powerful genomics-guided strategy for metabolite characterization in complex microbial ecosystems.
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