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Osmoregulated trehalose‐derived oligosaccharides in Sinorhizobium meliloti
Author(s) -
Brique Arnaud,
Devassine Jimi,
Pilard Serge,
Cailleu Dominique,
Gosselin Isabelle
Publication year - 2010
Publication title -
febs letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.593
H-Index - 257
eISSN - 1873-3468
pISSN - 0014-5793
DOI - 10.1016/j.febslet.2010.07.047
Subject(s) - sinorhizobium meliloti , trehalose , chemistry , biochemistry , sinorhizobium , microbiology and biotechnology , biology , bacteria , rhizobiaceae , symbiosis , gene , genetics , mutant
Sinorhizobium meliloti is a soil bacterium accumulating glutamate, N ‐acetylglutaminyl glutamine amide and trehalose in hyperosmolarity. Besides these compatible solutes, we highlighted several compounds in S. meliloti Rm1021 wild‐type strain. The purification and the structural characterization based on liquid chromatography evaporative light scattering detector, electrospray ionization high resolution mass spectrometry and nuclear magnetic resonance techniques showed they were four linear oligosaccharides composed of 3, 4, 5 and 6 glucose units all linked by α‐(1 → 2) linkages except a terminal α‐(1 ↔ 1) linkage. These oligosaccharides were cytoplasmic and were observed in several wild‐type strains suggesting they were common features in S. meliloti strains grown in hyperosmolarity.