7EXB

DfgA-DfgB complex apo 2.4 angstrom

Summary for 7EXB

• Entry DOI: 10.2210/pdb7exb/pdb
• Descriptor: Sugar phosphate isomerase/epimerase, DfgB, MANGANESE (II) ION, ... (5 entities in total)
• Functional Keywords: c-deglycosylation, sugar phosphate isomerase/epimerase, lyase
• Biological source: [Eubacterium] cellulosolvens 6; More
• Total number of polymer chains: 2
• Total formula weight: 52661.59

Authors

Mori, T.,Senda, M.,Senda, T.,Abe, I. (deposition date: 2021-05-26, release date: 2021-11-03, Last modification date: 2023-11-29)

Primary citation

Mori, T.,Kumano, T.,He, H.,Watanabe, S.,Senda, M.,Moriya, T.,Adachi, N.,Hori, S.,Terashita, Y.,Kawasaki, M.,Hashimoto, Y.,Awakawa, T.,Senda, T.,Abe, I.,Kobayashi, M.
C-Glycoside metabolism in the gut and in nature: Identification, characterization, structural analyses and distribution of C-C bond-cleaving enzymes.
Nat Commun, 12:6294-6294, 2021

PubMed Abstract: C-Glycosides, in which a sugar moiety is linked via a carbon-carbon (C-C) bond to a non-sugar moiety (aglycone), are found in our food and medicine. The C-C bond is cleaved by intestinal microbes and the resulting aglycones exert various bioactivities. Although the enzymes responsible for the reactions have been identified, their catalytic mechanisms and the generality of the reactions in nature remain to be explored. Here, we present the identification and structural basis for the activation of xenobiotic C-glycosides by heterocomplex C-deglycosylation enzymes from intestinal and soil bacteria. They are found to be metal-dependent enzymes exhibiting broad substrate specificity toward C-glycosides. X-ray crystallographic and cryo-electron microscopic analyses, as well as structure-based mutagenesis, reveal the structural details of these enzymes and the detailed catalytic mechanisms of their remarkable C-C bond cleavage reactions. Furthermore, bioinformatic and biochemical analyses suggest that the C-deglycosylation enzymes are widely distributed in the gut, soil, and marine bacteria.

PubMed: 34728636
DOI: 10.1038/s41467-021-26585-1

Experimental method

X-RAY DIFFRACTION (2.4 Å)