Projects per year
Abstract
Lactobacillus reuteri is a gut symbiont inhabiting the gastrointestinal tract of numerous vertebrates. The surface-exposed Serine-Rich Repeat Protein (SRRP) is a major adhesin in Gram-positive bacteria. Using lectin and sugar nucleotide profiling of wild-type or L. reuteri isogenic mutants, MALDI-ToF-MS, LC-MS and GC-MS analyses of SRRPs, we showed that L. reuteri strains 100-23C (from rodent) and ATCC 53608 (from pig) can perform protein O-glycosylation and modify SRRP100-23 and SRRP53608 with Hex-Glc-GlcNAc and di-GlcNAc moieties, respectively. Furthermore, in vivo glycoengineering in E. coli led to glycosylation of SRRP53608 variants with α-GlcNAc and GlcNAcβ(1→6)GlcNAcα moieties. The glycosyltransferases involved in the modification of these adhesins were identified within the SecA2/Y2 accessory secretion system and their sugar nucleotide preference determined by saturation transfer difference NMR spectroscopy and differential scanning fluorimetry. Together, these findings provide novel insights into the cellular O-protein glycosylation pathways of gut commensal bacteria and potential routes for glycoengineering applications.
| Original language | English |
|---|---|
| Pages (from-to) | 45-58 |
| Number of pages | 14 |
| Journal | Glycobiology |
| Volume | 29 |
| Issue number | 1 |
| Early online date | 27 Oct 2018 |
| DOIs | |
| Publication status | Published - 1 Jan 2019 |
Keywords
- Adhesins, Bacterial/chemistry
- Glycosylation
- Lactobacillus reuteri/chemistry
- Mutation
- Nuclear Magnetic Resonance, Biomolecular
- Repetitive Sequences, Amino Acid
Profiles
-
Jesus Angulo
- School of Chemistry, Pharmacy and Pharmacology - Honorary Associate Professor
Person: Honorary
-
Gwenaelle Le Gall
- Norwich Medical School - Lecturer in Nutritional Biochemistry
- Metabolic Health - Member
- Nutrition and Preventive Medicine - Member
Person: Research Group Member, Research Centre Member, Academic, Teaching and Research
Projects
- 1 Finished
-
Towards understanding the glycan code: next generation of structural glycobiology tools for accurate description of protein-glycan complexes.
Angulo, J. (Principal Investigator) & Angulo, J. (Co-Investigator)
Biotechnology and Biological Sciences Research Council
1/05/17 → 19/08/21
Project: Research
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