Bacteria
Ontology highlight
ABSTRACT:
PROVIDER: PRJDB10423 | ENA |
REPOSITORIES: ENA
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Project description:Levoglucosan is produced in the pyrolysis of cellulose and starch, including from bushfires or the burning of biofuels, and is deposited from the atmosphere across the surface of the earth. We describe two levoglucosan degrading Paenarthrobacter spp. (Paenarthrobacter nitrojuajacolis LG01 and Paenarthrobacter histidinolovorans LG02) that were isolated by metabolic enrichment on levoglucosan as sole carbon source. Genome sequencing and proteomics analysis revealed expression of a series of gene clusters encoding known levoglucosan degrading enzymes, levoglucosan dehydrogenase (LGDH, LgdA), 3-keto-levoglucosan b-eliminase (LgdB1) and glucose 3-dehydrogenase (LgdC), along with an ABC transporter cassette and associated solute binding protein. However, no homologues of 3-ketoglucose dehydratase (LgdB2) were evident. The expressed gene clusters contained a range of putative sugar phosphate isomerase/xylose isomerases with weak similarity to LgdB2. Sequence similarity network analysis of genome neighbors revealed that homologues of LgdA, LgdB1 and LgdC are generally conserved in a range of bacteria in the phyla Firmicutes, Actinobacteria and Proteobacteria. One sugar phosphate isomerase/xylose isomerase cluster (LgdB3) was identified with limited distribution mutually exclusive with LgdB2. LgdB1, LgdB2 and LgdB3 adopt similar predicted 3D folds suggesting overlapping function in processing intermediates in LG metabolism. Our findings highlight the diversity within the LGDH pathway through which bacteria utilize levoglucosan as a nutrient source.
2023-05-10 | PXD039086 | Pride