Evidence map›Paper›PMID 25548041›Full record

ArticleApplied and environmental microbiology2015

A chlorogenic acid esterase with a unique substrate specificity from Ustilago maydis.

Annabel Nieter, Paul Haase-Aschoff, Sebastian Kelle, Diana Linke, Ulrich Krings, Lutz Popper, Ralf G Berger

Open access · bronzeAbstract read
In one paragraph

Article in Applied and environmental microbiology, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers.

0numbers the graph read from it
0cells of the map it votes in
11citing papers in PubMed
2.3field-weighted citation impact, top 12% 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

11 citing papers in PubMed, 38 citations in OpenAlex.

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  5. Huitlacoche (Molecules (Basel, Switzerland) · 2023
    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

7 authors at 1 institution in 1 country.

Annabel NieterInstitut für Lebensmittelchemie, Leibniz Universität Hannover, Hannover, Germany annabel.nieter@lci.uni-hannover.de.
Paul Haase-AschoffInstitut für Lebensmittelchemie, Leibniz Universität Hannover, Hannover, Germany.
Sebastian KelleInstitut für Lebensmittelchemie, Leibniz Universität Hannover, Hannover, Germany.
Diana LinkeInstitut für Lebensmittelchemie, Leibniz Universität Hannover, Hannover, Germany.
Ulrich KringsInstitut für Lebensmittelchemie, Leibniz Universität Hannover, Hannover, Germany.
Lutz PopperSternEnzym GmbH & Co. KG, Ahrensburg, Germany.
Ralf G BergerInstitut für Lebensmittelchemie, Leibniz Universität Hannover, Hannover, Germany.
Leibniz University Hannover · DE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

An extracellular chlorogenic acid esterase from Ustilago maydis (UmChlE) was purified to homogeneity by using three separation steps, including anion-exchange chromatography on a Q Sepharose FF column, preparative isoelectric focusing (IEF), and, finally, a combination of affinity chromatography and hydrophobic interaction chromatography on polyamide. SDS-PAGE analysis suggested a monomeric protein of ∼71 kDa. The purified enzyme showed maximal activity at pH 7.5 and at 37°C and was active over a wide pH range (3.5 to 9.5). Previously described chlorogenic acid esterases exhibited a comparable affinity for chlorogenic acid, but the enzyme from Ustilago was also active on typical feruloyl esterase substrates. Kinetic constants for chlorogenic acid, methyl p-coumarate, methyl caffeate, and methyl ferulate were as follows: Km values of 19.6 μM, 64.1 μM, 72.5 μM, and 101.8 μM, respectively, and kcat/Km values of 25.83 mM(-1) s(-1), 7.63 mM(-1) s(-1), 3.83 mM(-1) s(-1) and 3.75 mM(-1) s(-1), respectively. UmChlE released ferulic, p-coumaric, and caffeic acids from natural substrates such as destarched wheat bran (DSWB) and coffee pulp (CP), confirming activity on complex plant biomass. The full-length gene encoding UmChlE consisted of 1,758 bp, corresponding to a protein of 585 amino acids, and was functionally produced in Pichia pastoris GS115. Sequence alignments with annotated chlorogenic acid and feruloyl esterases underlined the uniqueness of this enzyme.

Indexed as

Caffeic AcidsCarboxylic Ester HydrolasesChlorogenic AcidChromatography, LiquidCloning, MolecularCoumaric AcidsDNA, FungalElectrophoresis, Polyacrylamide GelGene ExpressionHydrogen-Ion ConcentrationIsoelectric FocusingKineticsMolecular Sequence DataMolecular WeightPichiaSequence Analysis, DNACaffeic AcidsCarboxylic Ester HydrolasesChlorogenic Acidchlorogenic acid esteraseCoumaric AcidsDNA, Fungalferulic acid

Identifiers

PMID25548041
PMCPMC4325150
OpenAlexW2141467787

What OpenQuestion holds

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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.