Evidence map›Paper›PMID 24670408›Full record

ArticlePloS one2014

Short-chain flavor ester synthesis in organic media by an E. coli whole-cell biocatalyst expressing a newly characterized heterologous lipase.

Guillaume Brault, François Shareck, Yves Hurtubise, François Lépine, Nicolas Doucet

Open access · goldAbstract read
In one paragraph

Article in PloS one, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers.

0numbers the graph read from it
0cells of the map it votes in
17citing papers in PubMed
2.7field-weighted citation impact, top 9% 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

17 citing papers in PubMed, 66 citations in OpenAlex.

  1. Article
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  6. Production of isopropyl and butyl esters by Clostridium mono-culture and co-culture.Journal of industrial microbiology & biotechnology · 2020
    Article
  7. Article
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  10. Crystallographic analysis of the Staphylococcus epidermidis lipase involved in esterification in aqueous solution.Acta crystallographica. Section F, Structural biology communications · 2018
    Article
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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 3 institutions in 1 country.

Guillaume BraultINRS-Institut Armand-Frappier, Université du Québec, Laval, Québec, Canada.
François ShareckINRS-Institut Armand-Frappier, Université du Québec, Laval, Québec, Canada.
Yves HurtubiseInnu-Science Canada, Inc., Local 119, Trois-Rivières, Québec, Canada.
François LépineINRS-Institut Armand-Frappier, Université du Québec, Laval, Québec, Canada.
Nicolas DoucetINRS-Institut Armand-Frappier, Université du Québec, Laval, Québec, Canada; PROTEO, the Québec Network for Research on Protein Function, Structure, and Engineering, Québec, Canada; GRASP, Groupe de Recherche Axé sur la Structure des Protéines, Québec, Canada.
Institut National de la Recherche Scientifique · CAInnu-Science (Canada) · CAPROTEO · CA

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Short-chain aliphatic esters are small volatile molecules that produce fruity and pleasant aromas and flavors. Most of these esters are artificially produced or extracted from natural sources at high cost. It is, however, possible to 'naturally' produce these molecules using biocatalysts such as lipases and esterases. A gene coding for a newly uncovered lipase was isolated from a previous metagenomic study and cloned into E. coli BL21 (DE3) for overexpression using the pET16b plasmid. Using this recombinant strain as a whole-cell biocatalyst, short chain esters were efficiently synthesized by transesterification and esterification reactions in organic media. The recombinant lipase (LipIAF5-2) showed good affinity toward glyceryl trioctanoate and the highest conversion yields were obtained for the transesterification of glyceryl triacetate with methanol. Using a simple cetyl-trimethylammonium bromide pretreatment increased the synthetic activity by a six-fold factor and the whole-cell biocatalyst showed the highest activity at 40°C with a relatively high water content of 10% (w/w). The whole-cell biocatalyst showed excellent tolerance to alcohol and short-chain fatty acid denaturation. Substrate affinity was equally effective with all primary alcohols tested as acyl acceptors, with a slight preference for methanol. The best transesterification conversion of 50 mmol glyceryl triacetate into isoamyl acetate (banana fragrance) provided near 100% yield after 24 hours using 10% biocatalyst loading (w/w) in a fluidized bed reactor, allowing recycling of the biocatalyst up to five times. These results show promising potential for an industrial approach aimed at the biosynthesis of short-chain esters, namely for natural flavor and fragrance production in micro-aqueous media.

Indexed as

TasteBatch Cell Culture TechniquesBiocatalysisCulture MediaEscherichia coliEsterificationEstersKineticsLipaseMethanolOrganic ChemicalsPentanolsRecombinant ProteinsSolventsTemperatureTime FactorsCulture MediaEstersisoamyl acetateLipaseMethanolOrganic ChemicalsPentanolsRecombinant ProteinsSolventsTriglyceridesWater

Identifiers

PMID24670408
PMCPMC3966760
OpenAlexW2065822074

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.