Evidence map›Paper›PMID 25738959›Full record

ArticlePLoS genetics2015

Rapid evolution of recombinant Saccharomyces cerevisiae for Xylose fermentation through formation of extra-chromosomal circular DNA.

Mekonnen M Demeke, María R Foulquié-Moreno, Françoise Dumortier, Johan M Thevelein

Open access · goldAbstract read
In one paragraph

Article in PLoS genetics, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 32 papers.

0numbers the graph read from it
0cells of the map it votes in
32citing papers in PubMed
3.5field-weighted citation impact, top 7% 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

32 citing papers in PubMed, 72 citations in OpenAlex.

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  16. AIMS microbiology · 2020
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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

4 authors at 2 institutions in 1 country.

Mekonnen M DemekeLaboratory of Molecular Cell Biology, Institute of Botany and Microbiology, KULeuven, Leuven-Heverlee, Flanders, Belgium; Department of Molecular Microbiology, VIB, Leuven-Heverlee, Flanders, Belgium.
María R Foulquié-MorenoLaboratory of Molecular Cell Biology, Institute of Botany and Microbiology, KULeuven, Leuven-Heverlee, Flanders, Belgium; Department of Molecular Microbiology, VIB, Leuven-Heverlee, Flanders, Belgium.
Françoise DumortierLaboratory of Molecular Cell Biology, Institute of Botany and Microbiology, KULeuven, Leuven-Heverlee, Flanders, Belgium; Department of Molecular Microbiology, VIB, Leuven-Heverlee, Flanders, Belgium.
Johan M TheveleinLaboratory of Molecular Cell Biology, Institute of Botany and Microbiology, KULeuven, Leuven-Heverlee, Flanders, Belgium; Department of Molecular Microbiology, VIB, Leuven-Heverlee, Flanders, Belgium.
VIB-KU Leuven Center for Microbiology · BEKU Leuven · BE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Circular DNA elements are involved in genome plasticity, particularly of tandem repeats. However, amplifications of DNA segments in Saccharomyces cerevisiae reported so far involve pre-existing repetitive sequences such as ribosomal DNA, Ty elements and Long Terminal Repeats (LTRs). Here, we report the generation of an eccDNA, (extrachromosomal circular DNA element) in a region without any repetitive sequences during an adaptive evolution experiment. We performed whole genome sequence comparison between an efficient D-xylose fermenting yeast strain developed by metabolic and evolutionary engineering, and its parent industrial strain. We found that the heterologous gene XylA that had been inserted close to an ARS sequence in the parent strain has been amplified about 9 fold in both alleles of the chromosomal locus of the evolved strain compared to its parent. Analysis of the amplification process during the adaptive evolution revealed formation of a XylA-carrying eccDNA, pXI2-6, followed by chromosomal integration in tandem arrays over the course of the evolutionary adaptation. Formation of the eccDNA occurred in the absence of any repetitive DNA elements, probably using a micro-homology sequence of 8 nucleotides flanking the amplified sequence. We isolated the pXI2-6 eccDNA from an intermediate strain of the evolutionary adaptation process, sequenced it completely and showed that it confers high xylose fermentation capacity when it is transferred to a new strain. In this way, we have provided clear evidence that gene amplification can occur through generation of eccDNA without the presence of flanking repetitive sequences and can serve as a rapid means of adaptation to selection pressure.

Indexed as

Evolution, MolecularAdaptation, PhysiologicalChromosomesDNA, CircularFermentationGenome, FungalMetabolic EngineeringRepetitive Sequences, Nucleic AcidSaccharomyces cerevisiaeXyloseDNA, CircularXylose

Identifiers

PMID25738959
PMCPMC4352087
OpenAlexW2067888199

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LicenceCC BY
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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.