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Cite: NAR/gkaa742 2020



PUL General Information

Literature Information

PUL ID

PUL0634

PubMed

33439065, Gut Microbes. 2021 Jan-Dec;13(1):1-20. doi: 10.1080/19490976.2020.1869503.

Characterization method

recombinant protein expression

Genomic accession number

NC_012781.1

Nucelotide position range

236959-244278

Substrate

sucrose,kestose,nystose

Loci

EUBREC_RS01145-EUBREC_RS01170

Species

Eubacterium rectale ATCC 33656 /39491

Degradation or Biosynthesis

degradation

Gene Name

Locus Tag

Protein ID

Gene Position

GenBank Contig Range

EC Number

- EUBREC_RS01145 WP_012741178.1 0 - 1026 (-) NC_012781.1:236959-237985 -
- EUBREC_RS01150 WP_012741179.1 1192 - 2107 (+) NC_012781.1:238151-239066 -
- EUBREC_RS01155 WP_012741180.1 2119 - 3022 (+) NC_012781.1:239078-239981 -
- EUBREC_RS01160 WP_041254406.1 3042 - 4731 (+) NC_012781.1:240001-241690 -
- EUBREC_RS01165 WP_012741182.1 4786 - 6250 (+) NC_012781.1:241745-243209 -
- EUBREC_RS01170 WP_012741183.1 6372 - 7320 (+) NC_012781.1:243331-244279 2.7.1.-

Cluster number

1

Gene name

Gene position

Gene type

Found by CGCFinder?

- 1 - 1026 (-) TF: DBD-Pfam|LacI,DBD-SUPERFAMILY|0036955 No
- 1193 - 2107 (+) TC: gnl|TC-DB|Q9KWT8|3.A.1.1.10 Yes
- 2120 - 3022 (+) TC: gnl|TC-DB|A9QDR8|3.A.1.1.29 Yes
- 3043 - 4731 (+) other Yes
- 4787 - 6250 (+) CAZyme: GH32| GH32 Yes
- 6373 - 7320 (+) STP: STP|PfkB No

PUL ID

PUL0634

PubMed

33439065, Gut Microbes. 2021 Jan-Dec;13(1):1-20. doi: 10.1080/19490976.2020.1869503.

Title

Characterization of fructooligosaccharide metabolism and fructooligosaccharide-degrading enzymes in human commensal butyrate producers.

Author

Tanno H, Fujii T, Hirano K, Maeno S, Tonozuka T, Sakamoto M, Ohkuma M, Tochio T, Endo A

Abstract

Butyrate produced by gut microbiota has multiple beneficial effects on host health, and oligosaccharides derived from host diets and glycans originating from host mucus are major sources of its production. A significant reduction of butyrate-producing bacteria has been reported in patients with inflammatory bowel diseases and colorectal cancers. Although gut butyrate levels are important for host health, oligosaccharide metabolic properties in butyrate producers are poorly characterized. We studied the metabolic properties of fructooligosaccharides (FOSs) and other prebiotic oligosaccharides (i.e. raffinose and xylooligosaccharides; XOSs) in gut butyrate producers. 1-Kestose (kestose) and nystose, FOSs with degrees of polymerization of 3 and 4, respectively, were also included. Fourteen species of butyrate producers were divided into four groups based on their oligosaccharide metabolic properties, which are group A (two species) metabolizing all oligosaccharides tested, group F (four species) metabolizing FOSs but not raffinose and XOSs, group XR (four species) metabolizing XOSs and/or raffinose but not FOSs, and group N (four species) metabolizing none of the oligosaccharides tested. Species assigned to groups A and XR are rich glycoside hydrolase (GH) holders, whereas those in groups F and N are the opposite. In total, 17 enzymes assigned to GH32 were observed in nine of the 14 butyrate producers tested, and species that metabolized FOSs had at least one active GH32 enzyme. The GH32 enzymes were divided into four clusters by phylogenetic analysis. Heterologous gene expression analysis revealed that the GH32 enzymes in each cluster had similar FOS degradation properties within clusters, which may be linked to the conservation/substitution of amino acids to bind with substrates in GH32 enzymes. This study provides important knowledge to understand the impact of FOS supplementation on the activation of gut butyrate producers. Abbreviations: SCFA, short chain fatty acid; FOS, fructooligosaccharide; XOS, xylooligosaccharide; CAZy, Carbohydrate Active Enzymes; CBM, carbohydrate-binding module; PUL, polysaccharide utilization locus; S6PH sucrose-6-phosphate hydrolase.