Kaszowska M, de Mendoza-Barbero E, Maciejewska A, Merino S, Lugowski C, Tomas JM The Complete Structure of the Core Oligosaccharide from Edwardsiella tarda EIB 202 Lipopolysaccharide International Journal of Molecular Sciences18(6) (2017)
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The structure was elucidated in this paper NCBI PubMed ID:28561753 Publication DOI:10.3390/ijms18061163 Journal NLM ID:101092791 Publisher: Basel, Switzerland: MDPI Correspondence: Marta Kaszowska <marta.kaszowskaiitd.pan.wroc.pl> Institutions: Department of Biotechnology and Molecular Biology, University of Opole, PL-Opole, Poland, Department of Immunochemistry, Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, Wroclaw, Poland, Department of Microbiology, University of Barcelona, Diagonal 643, 08071 Barcelona, Spain
The chemical structure and genomics of the lipopolysaccharide (LPS) core oligosaccharide of pathogenic Edwardsiella tarda strain EIB 202 were studied for the first time. The complete gene assignment for all LPS core biosynthesis gene functions was acquired. The complete structure of core oligosaccharide was investigated by 1H and 13C nuclear magnetic resonance (NMR) spectroscopy, electrospray ionization mass spectrometry MSn, and matrix-assisted laser-desorption/ionization time-of-flight mass spectrometry. The following structure of the undecasaccharide was established: The heterogeneous appearance of the core oligosaccharide structure was due to the partial lack of β-d-Galp and the replacement of α-d-GlcpNAcGly by α-d-GlcpNGly. The glycine location was identified by mass spectrometry.
NMR, core oligosaccharide, MALDI-TOF MS, Edwardsiella tarda, ESI MSn, genomic
Methods: 13C NMR, 1H NMR, methylation, NMR-2D, GC-MS, sugar analysis, 31P NMR, ESI-MS, mild acid hydrolysis, MALDI-TOF MS, function analysis of gene clusters Comments, role: the NMR solution was not indicated; The positions of glycine in OSVIII and OSVII were not determined. In OS glycoform terminal α-D-GlcpN residue was partial replacement by α-D-GlcpNAc residue.