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Peptidoglycan recycling mediated by an ABC transporter in the plant pathogen Agrobacterium tumefaciens

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  • Michael C. Gilmore

    (Umeå University)

  • Felipe Cava

    (Umeå University)

Abstract

During growth and division, the bacterial cell wall peptidoglycan (PG) is remodelled, resulting in the liberation of PG muropeptides which are typically reinternalized and recycled. Bacteria belonging to the Rhizobiales and Rhodobacterales orders of the Alphaproteobacteria lack the muropeptide transporter AmpG, despite having other key PG recycling enzymes. Here, we show that an alternative transporter, YejBEF-YepA, takes over this role in the Rhizobiales phytopathogen Agrobacterium tumefaciens. Muropeptide import by YejBEF-YepA governs expression of the β-lactamase AmpC in A. tumefaciens, contributing to β-lactam resistance. However, we show that the absence of YejBEF-YepA causes severe cell wall defects that go far beyond lowered AmpC activity. Thus, contrary to previously established Gram-negative models, PG recycling is vital for cell wall integrity in A. tumefaciens. YepA is widespread in the Rhizobiales and Rhodobacterales, suggesting that YejBEF-YepA-mediated PG recycling could represent an important but overlooked aspect of cell wall biology in these bacteria.

Suggested Citation

  • Michael C. Gilmore & Felipe Cava, 2022. "Peptidoglycan recycling mediated by an ABC transporter in the plant pathogen Agrobacterium tumefaciens," Nature Communications, Nature, vol. 13(1), pages 1-11, December.
    • Handle: RePEc:nat:natcom:v:13:y:2022:i:1:d:10.1038_s41467-022-35607-5
    DOI: 10.1038/s41467-022-35607-5
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    References listed on IDEAS

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    1. Paulina Seweryn & Lan Bich Van & Morten Kjeldgaard & Christopher J. Russo & Lori A. Passmore & Bjarne Hove-Jensen & Bjarne Jochimsen & Ditlev E. Brodersen, 2015. "Structural insights into the bacterial carbon–phosphorus lyase machinery," Nature, Nature, vol. 525(7567), pages 68-72, September.
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