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Sponge-associated bacteria mineralize arsenic and barium on intracellular vesicles.

ABSTRACT: Arsenic and barium are ubiquitous environmental toxins that accumulate in higher trophic-level organisms. Whereas metazoans have detoxifying organs to cope with toxic metals, sponges lack organs but harbour a symbiotic microbiome performing various functions. Here we examine the potential roles of microorganisms in arsenic and barium cycles in the sponge Theonella swinhoei, known to accumulate high levels of these metals. We show that a single sponge symbiotic bacterium, Entotheonella sp., constitutes the arsenic- and barium-accumulating entity within the host. These bacteria mineralize both arsenic and barium on intracellular vesicles. Our results indicate that Entotheonella sp. may act as a detoxifying organ for its host.

SUBMITTER: Keren R

PROVIDER: S-EPMC5333131 | biostudies-literature | 2017 Feb

REPOSITORIES: biostudies-literature

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Sponge-associated bacteria mineralize arsenic and barium on intracellular vesicles.

Keren Ray R Mayzel Boaz B Lavy Adi A Polishchuk Iryna I Levy Davide D Fakra Sirine C SC Pokroy Boaz B Ilan Micha M

Nature communications 20170224

Arsenic and barium are ubiquitous environmental toxins that accumulate in higher trophic-level organisms. Whereas metazoans have detoxifying organs to cope with toxic metals, sponges lack organs but harbour a symbiotic microbiome performing various functions. Here we examine the potential roles of microorganisms in arsenic and barium cycles in the sponge Theonella swinhoei, known to accumulate high levels of these metals. We show that a single sponge symbiotic bacterium, Entotheonella sp., const ...[more]

PMID: 28233852

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