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Updated: May 21, 2026
10:59
Enrichment of Bacterial Lipoproteins and Preparation of N-terminal Lipopeptides for Structural Determination by Mass Spectrometry
Published on: May 21, 2018
Novel cardiolipins from uncultured methane-metabolizing archaea
Marcos Y Yoshinaga1, Lars Wörmer, Marcus Elvert
1Organic Geochemistry Group, MARUM-Center for Marine Environmental Sciences & Department of Geosciences, University of Bremen, 28359 Bremen, Germany. marcosyukio@gmail.com
Archaea (Vancouver, B.C.)
|June 2, 2012
Summary
Novel archaeal cardiolipins, bisphosphatidylglycerols (BPGs), were discovered in deep-sea methane seeps. These BPGs, composed of isoprenoidal chains, may influence archaeal membrane properties and interspecies interactions.
Area of Science:
- Marine microbiology
- Lipid biochemistry
- Geochemistry
Background:
- Deep-sea sediments harbor unique microbial communities.
- Methane seeps are hotspots for specialized archaeal life.
- Intact polar lipids (IPLs) are key membrane components.
Purpose of the Study:
- To identify novel lipids in archaeal communities from deep-sea methane seeps.
- To characterize the structure and potential function of these lipids.
- To investigate the role of lipids in archaeal membrane properties.
Main Methods:
- High-performance liquid chromatography electrospray ionization mass spectrometry (HPLC-ESI-MS) for lipid analysis.
- Screening of intact polar lipid (IPL) composition.
- Analysis of microbial communities from Pakistan margin deep-sea sediments.
Main Results:
- Detection of novel cardiolipin analogues (bisphosphatidylglycerols, BPGs) in archaeal IPLs (0.5%–5%).
- BPGs characterized by four isoprenoidal chains with variations in length, unsaturation, and hydroxyl groups.
- Identification of two novel diether lipids as potential BPG degradation products.
Conclusions:
- Archaeal cardiolipin analogues (BPGs) are novel structural components in deep-sea seep environments.
- These BPGs likely modulate archaeal cell membrane permeability.
- Further research is needed to confirm BPGs' role in syntrophic methanotrophic consortia.
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