Cited by 22Enzyme Production and CharacterizationGenomics and Phylogenetic StudiesPolysaccharides and Plant Cell Walls

Metabolic pathway of 3,6-anhydro-d-galactose in carrageenan-degrading microorganisms

Lee, Sun Bok, Kim, Jeong Ah, Lim, Hyun Seung·2016·Applied Microbiology and Biotechnology

Abstract

Complete hydrolysis of κ-carrageenan produces two sugars, D-galactose and 3,6-anhydro-D-galactose (D-AnG). At present, however, we do not know how carrageenan-degrading microorganisms metabolize D-AnG. In this study, we investigated the metabolic pathway of D-AnG degradation by comparative genomic analysis of Cellulophaga lytica LIM-21, Pseudoalteromonas atlantica T6c, and Epulopiscium sp. N.t. morphotype B, which represent the classes Flavobacteria, Gammaproteobacteria, and Clostridia, respectively. In this bioinformatic analysis, we found candidate common genes that were believed to be involved in D-AnG metabolism. We then experimentally confirmed the enzymatic function of each gene product in the D-AnG cluster. In all three microorganisms, D-AnG metabolizing genes were clustered and organized in operon-like arrangements, which we named as the dan operon (3,6-d-anhydro-galactose). Combining bioinformatic analysis and experimental data, we showed that D-AnG is metabolized to pyruvate and D-glyceraldehyde-3-phosphate via four enzyme-catalyzed reactions in the following route: 3,6-anhydro-D-galactose → 3,6-anhydro-D-galactonate → 2-keto-3-deoxy-D-galactonate (D-KDGal) → 2-keto-3-deoxy-6-phospho-D-galactonate → pyruvate + D-glyceraldehyde-3-phosphate. The pathway of D-AnG degradation is composed of two parts: transformation of D-AnG to D-KDGal using two D-AnG specific enzymes and breakdown of D-KDGal to two glycolysis intermediates using two DeLey-Doudoroff pathway enzymes. To our knowledge, this is the first report on the metabolic pathway of D-AnG degradation.

Integrity signals

Registry

Crossref · 10.1007/s00253-016-7346-6

Cites

45 of 45 references verified0 citation errors · 0 not checkable

Statistics

Recomputing p-values needs the paper’s full text.

Claims the paper makes

This paper’s full text isn’t openly available, so its claims and self-check weren’t run. The registry and citation checks still apply.

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • The enzymatic hydrolysis of agarose and carrageenan produces the non-fermentable sugars l-AnG and d-AnG, respectively.

    “In addition to galactose, the enzymatic hydrolysis of agarose and carrageenan produces the non-fermentable sugars, 3,6-anhydrol-galactose (l-AnG) and 3,6-anhydro-d-galactose (d-AnG), respectively.”
  • Metabolic pathways for l-AnG and d-AnG are only common in agar- and carrageenan-degrading microorganisms, where they are converted to d-KDPGal through six and four enzyme-catalyzed reactions, respectively.

    “Metabolic pathways for l-AnG and d-AnG are only common in agar-and carrageenan-degrading microorganisms.In these organisms, l-AnG and d-AnG are converted to 2-keto-3-deoxy-6-phospho-d-galactonate (d-KDPGal) through six and four enzyme-catalyzed reactions, respectively [see Figure 5 in Lee et al. (2014Lee et al. ( , 2016))].”

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Lee, S. B., Kim, J. A., & Lim, H. S.
Affiliations
Pohang University of Science and Technology (KR)
Corresponding author
Lee, Sun Bok
Venue
Applied Microbiology and Biotechnology
Published
2016-02-15
Volume
100
Issue
9
Pages
4109-4121
ISSN
  • 0175-7598 (ISSN-L)
  • 1432-0614
OpenAlex
W2275029241
Cited by
22
References
45
Citations by year
2024: 4 · 2022: 4 · 2021: 1 · 2020: 2 · 2019: 1 · 2018: 5 · 2017: 2 · 2016: 3
FWCI
3.20
Type
journal article
Language
en
Open access
closed
Locations
  • Applied Microbiology and Biotechnology (publishedVersion)
  • PubMed (publishedVersion)
  • Open Access System for Information Sharing (Pohang University of Science and Technology) (submittedVersion)
Funders
  • POSCO
  • Korea Institute for Advancement of Technology (2015 Establishment of GEM, No. H2001-13-1001)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Biotechnology › Enzyme Production and Characterization
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Phylogenetic Studies
  • Life Sciences › Agricultural and Biological Sciences › Plant Science › Polysaccharides and Plant Cell Walls
Keywords
carrageenan degradation, Cellulophaga lytica, Pseudoalteromonas atlantica, pyruvate, D-glyceraldehyde-3-phosphate, carbohydrate catabolism, operon organization
MeSH terms
Clostridiales, Eubacteriales, Biotransformation, Carrageenan, Galactose, Multigene Family, Glyceraldehyde 3-Phosphate, Operon, Pyruvic Acid, Computational Biology, Pseudoalteromonas, Flavobacteriaceae, Metabolic Networks and Pathways

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review