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Peer-reviewedCC BY 4.0Molecular Microbiology

A Mobile Glycosylation Locus Modulates Cell Wall Architecture in Lactobacillus crispatus

5 affiliations
  1. 1Amsterdam Institute for Life and Environment (A‐LIFE) Vrije Universiteit Amsterdam Amsterdam the Netherlands
  2. 2Department of Biotechnology Delft University of Technology Delft the Netherlands
  3. 3Van't Hoff Institute for Molecular Sciences University of Amsterdam Amsterdam the Netherlands
  4. 4Wageningen Electron Microscopy Centre Wageningen University & Research Wageningen the Netherlands
  5. 5ARTIS‐Micropia Amsterdam the Netherlands

Abstract

Lactobacillus crispatus dominance in the vaginal microbiome is associated with beneficial health outcomes, yet strain‐level variation and its implications remain poorly understood. Here, we resolve the genomic context of three glycosyltransferase gene fragments (GT1‐3) previously linked with dysbiotic states. Long‐read resequencing revealed that GT1‐3 are part of a ~18.7 kb Wzx/Wzy‐dependent cell wall polysaccharide (CWPS) locus, containing several IS256‐family transposases. Serial propagation in vitro produced isolates with 4.1 kb excised via a composite transposon encompassing the GT3, UDP‐galactopyranose mutase, flippase, and hypothetical protein, demonstrating structural plasticity. Transmission electron microscopy showed a ~20%–25% thinner peptidoglycan layer in the derived strains, while FT‐IR and monosaccharide analysis indicated no gross changes. Molecular dynamics simulations suggest that GT3 contributes to the structural stability of the glycosyltransferase complex, without compromising catalytic function. Together, these findings establish the CWPS locus as a mobile, structurally plastic element that directly influences cell wall architecture in L. crispatus .

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BibTeX
@article{achterberg2026mobile,
  title = {{A Mobile Glycosylation Locus Modulates Cell Wall Architecture in Lactobacillus crispatus}},
  author = {P. Achterberg and M. Lekkerkerker and L. Koelemeijer and S. Illidge and J. Vroom and R. Y. Hertzberger and J. Vreede and M. C. M. van Loosdrecht and R. Kort},
  journal = {Molecular Microbiology},
  year = {2026},
  month = sep,
  doi = {10.1111/mmi.70112},
  url = {https://doi.org/10.1111/mmi.70112},
  note = {CC BY 4.0},
}
RIS
TY  - JOUR
TI  - A Mobile Glycosylation Locus Modulates Cell Wall Architecture in Lactobacillus crispatus
AU  - P. Achterberg
AU  - M. Lekkerkerker
AU  - L. Koelemeijer
AU  - S. Illidge
AU  - J. Vroom
AU  - R. Y. Hertzberger
AU  - J. Vreede
AU  - M. C. M. van Loosdrecht
AU  - R. Kort
PY  - 2026
DA  - 2026/09/10
JO  - Molecular Microbiology
DO  - 10.1111/mmi.70112
UR  - https://doi.org/10.1111/mmi.70112
AB  - Lactobacillus crispatus dominance in the vaginal microbiome is associated with beneficial health outcomes, yet strain‐level variation and its implications remain poorly understood. Here, we resolve the genomic context of three glycosyltransferase gene fragments (GT1‐3) previously linked with dysbiotic states. Long‐read resequencing revealed that GT1‐3 are part of a ~18.7 kb Wzx/Wzy‐dependent cell wall polysaccharide (CWPS) locus, containing several IS256‐family transposases. Serial propagation in vitro produced isolates with 4.1 kb excised via a composite transposon encompassing the GT3, UDP‐galactopyranose mutase, flippase, and hypothetical protein, demonstrating structural plasticity. Transmission electron microscopy showed a ~20%–25% thinner peptidoglycan layer in the derived strains, while FT‐IR and monosaccharide analysis indicated no gross changes. Molecular dynamics simulations suggest that GT3 contributes to the structural stability of the glycosyltransferase complex, without compromising catalytic function. Together, these findings establish the CWPS locus as a mobile, structurally plastic element that directly influences cell wall architecture in L. crispatus .
SN  - 0950-382X
SN  - 1365-2958
ER  -