Evidence map›Paper›PMID 26755730›Full record

ArticleThe Journal of biological chemistry2016

The Quaternary Structure of a Glycoside Hydrolase Dictates Specificity toward β-Glucans.

Mickael Lafond, Gerlind Sulzenbacher, Thibaud Freyd, Bernard Henrissat, Jean-Guy Berrin, Marie-Line Garron

Abstract read
In one paragraph

Article in The Journal of biological chemistry, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers.

0numbers the graph read from it
0cells of the map it votes in
10citing 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

10 citing papers in PubMed.

  1. Article
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  6. Review
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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

6 authors.

Mickael LafondFrom the Institut des Sciences Moléculaires de Marseille-BiosCiences, UMR7313 CNRS, Aix-Marseille University, Pôle de l'Etoile, 13284 Marseille, France, the INRA, UMR1163, Biodiversité et Biotechnologie Fongiques, Aix-Marseille University, Polytech'Marseille, F-13288 Marseille, France.
Gerlind Sulzenbacherthe Architecture et Fonction des Macromolécules Biologiques, UMR7257 CNRS, Aix-Marseille University, F-13288 Marseille, France, the INRA, USC1408 Architecture et Fonction des Macromolécules Biologiques, F-13288 Marseille, France, and.
Thibaud Freydthe Architecture et Fonction des Macromolécules Biologiques, UMR7257 CNRS, Aix-Marseille University, F-13288 Marseille, France.
Bernard Henrissatthe Architecture et Fonction des Macromolécules Biologiques, UMR7257 CNRS, Aix-Marseille University, F-13288 Marseille, France, the INRA, USC1408 Architecture et Fonction des Macromolécules Biologiques, F-13288 Marseille, France, and the Department of Biological Sciences, King Abdulaziz University, Jeddah 21589, Saudi Arabia.
Jean-Guy Berrinthe INRA, UMR1163, Biodiversité et Biotechnologie Fongiques, Aix-Marseille University, Polytech'Marseille, F-13288 Marseille, France, jean-guy.berrin@univ-amu.fr.
Marie-Line Garronthe Architecture et Fonction des Macromolécules Biologiques, UMR7257 CNRS, Aix-Marseille University, F-13288 Marseille, France, the INRA, USC1408 Architecture et Fonction des Macromolécules Biologiques, F-13288 Marseille, France, and.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

In the Carbohydrate-Active Enzyme (CAZy) database, glycoside hydrolase family 5 (GH5) is a large family with more than 6,000 sequences. Among the 51 described GH5 subfamilies, subfamily GH5_26 contains members that display either endo-β(1,4)-glucanase or β(1,3;1,4)-glucanase activities. In this study, we focused on the GH5_26 enzyme fromSaccharophagus degradans(SdGluc5_26A), a marine bacterium known for its capacity to degrade a wide diversity of complex polysaccharides.SdGluc5_26A displays lichenase activity toward β(1,3;1,4)-glucans with a side cellobiohydrolase activity toward β(1,4)-glucans. The three-dimensional structure ofSdGluc5_26A adopts a stable trimeric quaternary structure also observable in solution. The N-terminal region ofSdGluc5_26A protrudes into the active site of an adjacent monomer. To understand whether this occupation of the active site could influence its activity, we conducted a comprehensive enzymatic characterization ofSdGluc5_26A and of a mutant truncated at the N terminus. Ligand complex structures and kinetic analyses reveal that the N terminus governs the substrate specificity ofSdGluc5_26A. Its deletion opens the enzyme cleft at the -3 subsite and turns the enzyme into an endo-β(1,4)-glucanase. This study demonstrates that experimental approaches can reveal structure-function relationships out of reach of current bioinformatic predictions.

Indexed as

Amino Acid SequenceAquatic OrganismsBacterial Proteinsbeta-GlucansBiocatalysisCatalytic DomainCellulose 1,4-beta-CellobiosidaseCloning, MolecularCrystallography, X-RayEscherichia coliGammaproteobacteriaGene ExpressionGlycoside HydrolasesHydrolysisModels, MolecularMolecular Sequence DataBacterial Proteinsbeta-GlucansCellulose 1,4-beta-CellobiosidaseGlycoside HydrolaseslicheninaseRecombinant ProteinsCAZymecrystallographyendoglucanaseenzymeglycobiologyglycoside hydrolaselichenaseoligomerizationSaccharophagus degradans

Identifiers

PMID26755730
PMCPMC4807298

What OpenQuestion holds

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Registered trials

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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.