2022
DOI: 10.1038/s41396-022-01223-w
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Glycoside hydrolase from the GH76 family indicates that marine Salegentibacter sp. Hel_I_6 consumes alpha-mannan from fungi

Abstract: Microbial glycan degradation is essential to global carbon cycling. The marine bacterium Salegentibacter sp. Hel_I_6 (Bacteroidota) isolated from seawater off Helgoland island (North Sea) contains an α-mannan inducible gene cluster with a GH76 family endo-α-1,6-mannanase (ShGH76). This cluster is related to genetic loci employed by human gut bacteria to digest fungal α-mannan. Metagenomes from the Hel_I_6 isolation site revealed increasing GH76 gene frequencies in free-living bacteria during microalgae blooms,… Show more

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Cited by 8 publications
(5 citation statements)
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References 99 publications
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“…Recent research also showed the degradation of fungal a-mannan by a Salegentibacter sp. (Bacteroidota) strain isolated during a phytoplankton bloom in the North Sea (Solanki et al, 2022).…”
Section: Discussionmentioning
confidence: 99%
“…Recent research also showed the degradation of fungal a-mannan by a Salegentibacter sp. (Bacteroidota) strain isolated during a phytoplankton bloom in the North Sea (Solanki et al, 2022).…”
Section: Discussionmentioning
confidence: 99%
“…For example, the common gut resident Bacteroides thetaiotaomicron dedicates ~7% of its genome to glycoside hydrolases (Kaoutari et al ., 2013). While CAZymes have been studied in detail within various commensal microbes and marine ecosystems (Sichert et al ., 2020; Solanki et al ., 2022), the role these enzymes play in pathogenic bacteria are still unclear. Interestingly, chitinases, which hydrolyze chitin polymers into N-acetyl glucosamine oligomers, are a well-studied family of glycoside hydrolases in pathogens.…”
Section: Discussionmentioning
confidence: 99%
“…A subsequent study characterised a GH76 enzyme from a marine bacterial species of Salegentibacter showed endo α1,6-mannanase activity against yeast α-mannan, which suggests that fungi in aquatic environments also produce α-mannan for their cell walls [ 31 ]. The gene for this GH76 is in an operon with CAZymes from families GH92, GH2, GH125, and GH43, so it is likely this bacterium is equipped to breakdown complex fungal α-mannan structures.…”
Section: Deconstruction Of Fungal α-Mannanmentioning
confidence: 99%