Abstract
Bdellovibrio-and-like organisms (BALO) are a phylogenetically diverse group of predatory prokaryotes that consists of the two families Bdellovibrionaceae and Bacteriovoracaceae. We investigated the phospholipid composition of the three important BALO strains Bacteriovorax stolpii (DSM 12778), Bdellovibrio bacteriovorus HD100 (DSM 50701) and Peredibacter starrii (DSM 17039). We confirmed the presence of sphingophosphonolipids in B. stolpii, while we characterized sphingophosphonolipids with a 2-amino-3-phosphonopropanate head group for the first time. In B. bacteriovorus HD100 phosphatidylthreonines were found and, thus, B. bacteriovorus is the second prokaryote investigated so far possessing this rare lipid class. In the third analyzed organism, P. starrii, we observed phosphatidylethanolamine structures with an additional N-glutamyl residue, which form the first reported class of amino acid-containing phosphatidylethanolamines.
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Abbreviations
- 1D:
-
One dimensional
- AEP:
-
2-Aminoethylphosphonate
- APP:
-
2-Amino-3-phosphonopropanate
- BALO:
-
Bdellovibrio-and-like organism
- EI/MS:
-
Electron impact ionization mass spectrometry
- FA:
-
Fatty acid
- FT–MS:
-
Fourier transform mass spectrometry
- GC:
-
Gas chromatography
- GluPtdEth:
-
Glutamylphosphatidylethanolamine
- GPL:
-
Glycerophospholipid
- HAEP:
-
1-Hydroxy-2-aminoethylphosphonate
- HPLC:
-
High-performance liquid chromatography
- MS:
-
Mass spectrometry
- MS/MS:
-
Tandem mass spectrometry
- MTBE:
-
Methyl tert-butyl ether
- NAPtdEth:
-
N-acylphosphatidylethanolamine
- OMP:
-
Outer membrane protein
- Ptd2Gro:
-
Cardiolipin
- PtdCho:
-
Phosphatidylcholine
- PtdEth:
-
Phosphatidylethanolamine
- PtdGro:
-
Phosphatidylglycerol
- PtdIns:
-
Phosphatidylinositol
- PtdOH:
-
Phosphatidic acid
- PtdSer:
-
Phosphatidylserine
- PtdThr:
-
Phosphatidylthreonine
- rRNA:
-
Ribosomal ribonucleic acid
- SPNL:
-
Sphingophosphonolipid
- TLC:
-
Thin layer chromatography
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Acknowledgments
The authors gratefully acknowledge financial support by the Deutsche Forschungsgemeinschaft Grant LI309/29-1.
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Müller, F.D., Beck, S., Strauch, E. et al. Bacterial Predators Possess Unique Membrane Lipid Structures. Lipids 46, 1129–1140 (2011). https://doi.org/10.1007/s11745-011-3614-5
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DOI: https://doi.org/10.1007/s11745-011-3614-5