Evidence map›Paper›PMID 16160832›Full record

ArticleCurrent genetics2005

A two-step protocol for efficient deletion of genes in the filamentous ascomycete Podospora anserina.

Andrea Hamann, Kristin Krause, Alexandra Werner, Heinz D Osiewacz

Abstract read
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In one paragraph

Article in Current genetics, 2005. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers.

0numbers the graph read from it
0cells of the map it votes in
16citing papers in PubMed
0.5field-weighted citation impact, top 37% 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

16 citing papers in PubMed, 30 citations in OpenAlex.

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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 1 institution in 1 country.

Andrea HamannBiozentrum, Botanisches Institut, Marie-Curie-Str. 9, 60439, Frankfurt, Germany. a.hamann@em.uni-frankfurt.de
Kristin Krause
Alexandra Werner
Heinz D Osiewacz
Goethe University Frankfurt · DE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Deletion of genes in Podospora anserina via conventional methods is an inefficient and time-consuming process since homologous recombination occurs normally only at low frequency (about 1%). To improve the efficiency of replacement, we adopted the two-step protocol developed for Aspergillus nidulans (Chaveroche et al. in Nucleic Acids Res 28:E97, 2000). As a prerequisite, a vector was generated containing a blasticidin resistance cassette for selection in the Escherichia coli host strain KS272 (pKOBEG) and a phleomycin resistance cassette for selection in P. anserina. A derivative of this vector, into which short ( approximately 250 bp) PCR-generated sequences flanking the gene to be deleted have been integrated, is introduced into the E. coli host strain which contains a cosmid with the gene of interest and long 5' and 3' flanking sequences. Subsequently, a cosmid is reisolated from E. coli in which the gene of interest is replaced by the resistance cassette. This construct is used to transform P. anserina. The long stretches flanking the resistance cassette facilitate recombination with homologous sequences in the fungal genome and increase the efficiency of gene deletion up to 100%. The procedure is not dependent on the availability of specific auxotrophic mutant strains and may be applicable to other fungi.

Indexed as

Gene DeletionMutagenesisEscherichia coliGenes, FungalGenetic VectorsModels, GeneticPodosporaRestriction MappingTransformation, Genetic

Identifiers

PMID16160832
OpenAlexW2032297094

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.