<i>Chlorobaculum tepidum</i> outer membrane vesicles may transport biogenic elemental sulfur.

ABSTRACT: Outer membrane-derived vesicles (OMVs) have been studied in different phyla of gram-negative bacteria, most extensively in the Pseudomonadota, where they have been shown to participate in diverse biological and environmental processes. To date, the production of OMVs has not been reported in the Chlorobiaceae within the phylum Chlorobiota. Chlorobaculum tepidum is the model organism for the Chlorobiaceae that synthesizes and consumes insoluble extracellular sulfur (S(0)) globules by an unknown mechanism. Here, we report evidence implicating outer membrane vesicles in biogenic S(0) globule synthesis. We demonstrate that Cba. tepidum secretes OMVs in the extracellular milieu and that OMV concentration and size vary with growth conditions, particularly sulfide concentration. A c

SUBMITTER: Noundou VL 

PROVIDER: S-EPMC12285230 | biostudies-literature | 2025 Jul

REPOSITORIES: biostudies-literature