Evidence map›Paper›PMID 20181943›Full record

ArticleThe Journal of biological chemistry2010

Structural and kinetic analysis of Schwanniomyces occidentalis invertase reveals a new oligomerization pattern and the role of its supplementary domain in substrate binding.

Miguel Alvaro-Benito, Aitana Polo, Beatriz González, María Fernández-Lobato, Julia Sanz-Aparicio

Open access · hybridAbstract read
In one paragraph

Article in The Journal of biological chemistry, 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 30 papers.

0numbers the graph read from it
0cells of the map it votes in
30citing papers in PubMed
5.7field-weighted citation impact, top 4% of its field
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

30 citing papers in PubMed, 79 citations in OpenAlex.

  1. Article
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  14. UniqueJournal of biological engineering · 2019
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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

5 authors at 2 institutions in 1 country.

Miguel Alvaro-BenitoCentro de Biología Molecular Severo Ochoa, Departamento de Biología Molecular, Consejo Superior de Investigaciones Cientificas-Universidad Autónoma de Madrid, Cantoblanco, 28049 Madrid, Spain.
Aitana Polo
Beatriz González
María Fernández-Lobato
Julia Sanz-Aparicio
Instituto de Química Física Blas Cabrera · ESConsejo Superior de Investigaciones Científicas · ES

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Schwanniomyces occidentalis invertase is an extracellular enzyme that hydrolyzes sucrose and releases beta-fructose from various oligosaccharides and essential storage fructan polymers such as inulin. We report here the three-dimensional structure of Sw. occidentalis invertase at 2.9 A resolution and its complex with fructose at 1.9 A resolution. The monomer presents a bimodular arrangement common to other GH32 enzymes, with an N-terminal 5-fold beta-propeller catalytic domain and a C-terminal beta-sandwich domain for which the function has been unknown until now. However, the dimeric nature of Sw. occidentalis invertase reveals a unique active site cleft shaped by both subunits that may be representative of other yeast enzymes reported to be multimeric. Binding of the tetrasaccharide nystose and the polymer inulin was explored by docking analysis, which suggested that medium size and long substrates are recognized by residues from both subunits. The identified residues were mutated, and the enzymatic activity of the mutants against sucrose, nystose, and inulin were investigated by kinetic analysis. The replacements that showed the largest effect on catalytic efficiency were Q228V, a residue putatively involved in nystose and inulin binding, and S281I, involved in a polar link at the dimer interface. Moreover, a significant decrease in catalytic efficiency against inulin was observed in the mutants Q435A and Y462A, both located in the beta-sandwich domain of the second monomer. This highlights the essential function that oligomerization plays in substrate specificity and assigns, for the first time, a direct catalytic role to the supplementary domain of a GH32 enzyme.

Indexed as

Protein MultimerizationAmino Acid Substitutionbeta-FructofuranosidaseCrystallography, X-RayFructansFructoseMutation, MissenseOligosaccharidesProtein Structure, QuaternaryProtein Structure, SecondaryProtein Structure, TertiarySaccharomycetalesbeta-FructofuranosidaseFructansFructosefungitetraoseOligosaccharides

Identifiers

PMID20181943
PMCPMC2859555
OpenAlexW1993074379

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

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.