Evidence map›Paper›PMID 23519813›Full record

ArticleActa crystallographica. Section F, Structural biology and crystallization communications2013

Heterologous expression, purification, crystallization and preliminary X-ray analysis of Trichoderma reesei xylanase II and four variants.

Qun Wan, Andrey Kovalevsky, Qiu Zhang, Scott Hamilton-Brehm, Rosalynd Upton, Kevin L Weiss, Marat Mustyakimov, David Graham, Leighton Coates, Paul Langan

Abstract read
In one paragraph

Article in Acta crystallographica. Section F, Structural biology and crystallization communications, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.

0numbers the graph read from it
0cells of the map it votes in
1citing 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

1 citing paper in PubMed.

  1. 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

10 authors.

Qun WanBiology and Soft Matter Division, Oak Ridge National Laboratory, 1 Bethel Valley Road, Oak Ridge, TN 37831, USA.
Andrey Kovalevsky
Qiu Zhang
Scott Hamilton-Brehm
Rosalynd Upton
Kevin L Weiss
Marat Mustyakimov
David Graham
Leighton Coates
Paul Langan

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Xylanase II from Trichoderma reesei catalyzes the hydrolysis of glycosidic bonds in xylan. Crystallographic studies of this commercially important enzyme have been initiated to investigate its reaction mechanism, substrate binding and dependence on basic pH conditions. The wild-type protein was heterologously expressed in an Escherichia coli host using the defined medium and four active-site amino acids were replaced to abolish its activity (E177Q and E86Q) or to change its pH optimum (N44D and N44H). Cation-exchange and size-exclusion chromatography were used to obtain >90% protein purity. The ligand-free proteins and variant complexes containing substrate (xylohexaose) or product (xylotriose) were crystallized in several different space groups and diffracted to high resolutions (from 1.07 to 1.55 Å).

Indexed as

CrystallizationCrystallography, X-RayEndo-1,4-beta XylanasesEscherichia coliFungal ProteinsHydrogen-Ion ConcentrationModels, MolecularMutagenesis, Site-DirectedProtein Structure, SecondaryProtein Structure, TertiaryRecombinant ProteinsSubstrate SpecificityTrichodermaTrisaccharidesXylansEndo-1,4-beta XylanasesFungal ProteinsRecombinant ProteinsTrisaccharidesXylansxylotrioseTrichoderma reeseixylanase II

Identifiers

PMID23519813
PMCPMC3606583

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.