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Mar Drugs. 2018 Apr 11;16(4). pii: E124. doi: 10.3390/md16040124.

The Structure of the Lipid A from the Halophilic Bacterium Spiribacter salinus M19-40T.

Author information

1
Department of Chemical Sciences, University of Naples Federico II, 80126 Naples, Italy. clarabarrau@gmail.com.
2
Department of Chemical Sciences, University of Naples Federico II, 80126 Naples, Italy. flaviana.dilorenzo@unina.it.
3
Cátedra de Microbiología, Facultad de Química y Unidad Asociada de Facultad de Ciencias, Universidad de la República, 11800 Montevideo, Uruguay. jmenes@fq.edu.uy.
4
Department of Chemical Sciences, University of Naples Federico II, 80126 Naples, Italy. lanzetta@unina.it.
5
Department of Chemical Sciences, University of Naples Federico II, 80126 Naples, Italy. molinaro@unina.it.
6
Department of Chemical Sciences, University of Naples Federico II, 80126 Naples, Italy. silipo@unina.it.

Abstract

The study of the adaptation mechanisms that allow microorganisms to live and proliferate in an extreme habitat is a growing research field. Directly exposed to the external environment, lipopolysaccharides (LPS) from Gram-negative bacteria are of great appeal as they can present particular structural features that may aid the understanding of the adaptation processes. Moreover, through being involved in modulating the mammalian immune system response in a structure-dependent fashion, the elucidation of the LPS structure can also be seen as a fundamental step from a biomedical point of view. In this paper, the lipid A structure of the LPS from Spiribacter salinus M19-40T, a halophilic gamma-proteobacteria, was characterized through chemical analyses and matrix-assisted laser desorption ionization (MALDI) mass spectrometry. This revealed a mixture of mono- and bisphosphorylated penta- to tri-acylated species with the uncommon 2 + 3 symmetry and bearing an unusual 3-oxotetradecaonic acid.

KEYWORDS:

3-oxotetradecaonic acid; Ectothiorhodospiraceae; Spiribacter salinus; halophiles; lipid A; lipopolysaccharide (LPS); matrix-assisted laser desorption ionization (MALDI) mass spectrometry

PMID:
29641496
PMCID:
PMC5923411
DOI:
10.3390/md16040124
[Indexed for MEDLINE]
Free PMC Article

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