Genetics behind the biosynthesis of nonulosonic acid containing lipooligosaccharides in<i>Campylobacter coli</i>

Culebro, Alejandra; Gilbert, Michel; Stupak, Jacek; Jian-ju, LI; Wakarchuk, Warren W.; Rossi, Mirko

doi:10.1101/254235

2018

DOI: 10.1101/254235

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Genetics behind the biosynthesis of nonulosonic acid containing lipooligosaccharides inCampylobacter coli

Alejandra Culebro

Michel Gilbert

Jacek Stupak³

et al.

Abstract: 14Campylobacter jejuni and Campylobacter coli are the most common cause of bacterial 15 gastroenteritis in the world. Ganglioside mimicry by C. jejuni lipooligosaccharide (LOS) is the 16 triggering factor of Guillain-Barré syndrome (GBS), an acute polyneuropathy.

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Genetics behind the Biosynthesis of Nonulosonic Acid-Containing Lipooligosaccharides in Campylobacter coli

et al. 2019

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Campylobacter jejuni and Campylobacter coli are the most common causes of bacterial gastroenteritis in the world. Ganglioside mimicry by C. jejuni lipooligosaccharide (LOS) is the triggering factor of Guillain-Barré syndrome (GBS), an acute polyneuropathy. Sialyltransferases from glycosyltransferase family 42 (GT-42) are essential for the expression of ganglioside mimics in C. jejuni. Recently, two novel GT-42 genes, cstIV and cstV, have been identified in C. coli. Despite being present in ∼11% of currently available C. coli genomes, the biological role of cstIV and cstV is unknown. In the present investigation, mutation studies with two strains expressing either cstIV or cstV were performed and mass spectrometry was used to investigate differences in the chemical composition of LOS. Attempts were made to identify donor and acceptor molecules using in vitro activity tests with recombinant GT-42 enzymes. Here we show that CstIV and CstV are involved in C. coli LOS biosynthesis. In particular, cstV is associated with LOS sialylation, while cstIV is linked to the addition of a diacetylated nonulosonic acid residue. IMPORTANCE Despite the fact that Campylobacter coli a major foodborne pathogen, its glycobiology has been largely neglected. The genetic makeup of the C. coli lipooligosaccharide biosynthesis locus was largely unknown until recently. C. coli harbors a large set of genes associated with lipooligosaccharide biosynthesis, including genes for several putative glycosyltransferases involved in the synthesis of sialylated lipooligosaccharide in Campylobacter jejuni. In the present study, C. coli was found to express lipooligosaccharide structures containing sialic acid and other nonulosonate acids. These findings have a strong impact on our understanding of C. coli ecology, host-pathogen interaction, and pathogenesis.

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Genetics behind the Biosynthesis of Nonulosonic Acid-Containing Lipooligosaccharides in Campylobacter coli

et al. 2019

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Genetics behind the biosynthesis of nonulosonic acid containing lipooligosaccharides inCampylobacter coli

Abstract: 14Campylobacter jejuni and Campylobacter coli are the most common cause of bacterial 15 gastroenteritis in the world. Ganglioside mimicry by C. jejuni lipooligosaccharide (LOS) is the 16 triggering factor of Guillain-Barré syndrome (GBS), an acute polyneuropathy.

Cited by 1 publication

References 46 publications

Genetics behind the Biosynthesis of Nonulosonic Acid-Containing Lipooligosaccharides in Campylobacter coli

Genetics behind the Biosynthesis of Nonulosonic Acid-Containing Lipooligosaccharides in Campylobacter coli

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