Genomic insights into Candidatus Argiopiplasma dusa, a bacterial symbiont of the wasp spider Argiope bruennichi

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ID: 329447
2026
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Ranked #188 of 241 articles by views in FEMS microbiology letters

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Abstract
Bacterial symbionts were shown to have diverse but significant impacts on the fitness of their host in insects, but little is known on the symbionts of spiders and their interactions with their hosts. Here, we assembled and investigated the circular 575 kb genome of Candidatus Argiopiplasma dusa, a novel bacterial symbiont of the wasp spider Argiope bruennichi. Phylogenomic analysis placed this species within the phylum Mycoplasmatota, in a poorly characterized clade that may represent a new order-level lineage or affiliate with the Mycoplasmatales order. With 559 predicted genes, the genome is relatively small compared to other Mycoplasmatota genomes (on average 969 genes) and has a low GC content of ∼24%. While the genome encodes genes for proteins involved in glycolysis and fermentative acetate production, it revealed minimal biosynthetic capabilities with pathways for nucleotide, amino acid and vitamin biosynthesis being absent in Ca. Argiopiplasma dusa. This suggests a metabolic dependence and an endosymbiotic lifestyle within the spider host. The symbiont was detected in A. bruennichi populations across the distribution range of the spider but appears to be absent in certain populations.
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Authors Larissa Milena Busch, Monica M. Sheffer, Nina Dombrowski, Henrik Krehenwinkel, Stefan Prost, Anja Spang, George R. Uhl, Tim Urich, Katharina J. Hoff, Mia Maria Bengtsson
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Journal FEMS microbiology letters
Year 2026
DOI
10.1093/femsle/fnag103
URL
https://doi.org/10.1093/femsle/fnag103
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