Evidence map›Paper›PMID 29717710›Full record

ArticleActa crystallographica. Section D, Structural biology2018

Bacteroides thetaiotaomicron generates diverse α-mannosidase activities through subtle evolution of a distal substrate-binding motif.

Andrew J Thompson, Richard J Spears, Yanping Zhu, Michael D L Suits, Spencer J Williams, Harry J Gilbert, Gideon J Davies

Abstract read
In one paragraph

Article in Acta crystallographica. Section D, Structural biology, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers.

0numbers the graph read from it
0cells of the map it votes in
9citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

9 citing papers in PubMed.

  1. Article
  2. Article
  3. Review
  4. Article
  5. Article
  6. PlantProceedings of the National Academy of Sciences of the United States of America · 2022
    Article
  7. Article
  8. Article
  9. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors.

Andrew J ThompsonDepartment of Chemistry, University of York, Heslington, York YO10 5DD, England.ORCID 0000-0001-7865-1856
Richard J SpearsDepartment of Chemistry, University of York, Heslington, York YO10 5DD, England.ORCID 0000-0001-9846-8637
Yanping ZhuInstitute for Cell and Molecular Biosciences, Newcastle University, Framlington Place, Newcastle-upon-Tyne NE2 4HH, England.
Michael D L SuitsDepartment of Chemistry, University of York, Heslington, York YO10 5DD, England.
Spencer J WilliamsSchool of Chemistry and Bio21 Molecular Science and Biotechnology Institute, University of Melbourne, Parkville, Victoria, Australia.ORCID 0000-0001-6341-4364
Harry J GilbertInstitute for Cell and Molecular Biosciences, Newcastle University, Framlington Place, Newcastle-upon-Tyne NE2 4HH, England.
Gideon J DaviesDepartment of Chemistry, University of York, Heslington, York YO10 5DD, England.ORCID 0000-0002-7343-776X

Funding

Biotechnology and Biological Sciences Research Council BB/G016127/1
6 · The paper itself

Abstract

A dominant human gut microbe, the well studied symbiont Bacteroides thetaiotaomicron (Bt), is a glyco-specialist that harbors a large repertoire of genes devoted to carbohydrate processing. Despite strong similarities among them, many of the encoded enzymes have evolved distinct substrate specificities, and through the clustering of cognate genes within operons termed polysaccharide-utilization loci (PULs) enable the fulfilment of complex biological roles. Structural analyses of two glycoside hydrolase family 92 α-mannosidases, BT3130 and BT3965, together with mechanistically relevant complexes at 1.8-2.5 Å resolution reveal conservation of the global enzyme fold and core catalytic apparatus despite different linkage specificities. Structure comparison shows that Bt differentiates the activity of these enzymes through evolution of a highly variable substrate-binding region immediately adjacent to the active site. These observations unveil a genetic/biochemical mechanism through which polysaccharide-processing bacteria can evolve new and specific biochemical activities from otherwise highly similar gene products.

Indexed as

Evolution, MolecularGenetic Variationalpha-MannosidaseAmino Acid SequenceBacteroides thetaiotaomicronCatalytic DomainCrystallography, X-RayGlycoside HydrolasesHumansPolysaccharidesSubstrate Specificityalpha-MannosidaseGlycoside HydrolasesPolysaccharidesBacteroides thetaiotaomicroncarbohydratesglycansglycoside hydrolase family 92substrate specificityα-mannosidase

Identifiers

PMID29717710
PMCPMC5930347

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.