Evidence map›Paper›PMID 19127370›Full record

ArticlePlanta2009

Strategies to facilitate transgene expression in Chlamydomonas reinhardtii.

Alke Eichler-Stahlberg, Wolfram Weisheit, Ovidiu Ruecker, Markus Heitzer

Abstract read
PubMed Publisher
In one paragraph

Article in Planta, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 67 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
67citing papers in PubMed, 1 pooled it
2.8field-weighted citation impact, top 10% 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

67 citing papers in PubMed, 1 synthesis or guideline pooled it, 176 citations in OpenAlex.

  1. Pooled it
  2. Review
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  6. Review
  7. Article
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  11. Review
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  19. Engineered production of isoprene from the model green microalgaMetabolic engineering communications · 2023
    Article
  20. Article

7 more citing papers are in PubMed but not listed here.

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.

Alke Eichler-StahlbergCenter of Excellence for Fluorescent Bioanalysis, University of Regensburg, Josef-Engert-Str. 9, 93053, Regensburg, Germany.
Wolfram Weisheit
Ovidiu Ruecker
Markus Heitzer
University of Regensburg · DE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The unicellular green alga Chlamydomonas reinhardtii has been identified as a promising organism for the production of recombinant proteins. While during the last years important improvements have been developed for the production of proteins within the chloroplast, the expression levels of transgenes from the nuclear genome were too low to be of biotechnological importance. In this study, we integrated endogenous intronic sequences into the expression cassette to enhance the expression of transgenes in the nucleus. The insertion of one or more copies of intron sequences from the Chlamydomonas RBCS2 gene resulted in increased expression levels of a Renilla-luciferase gene used as a reporter. Although any of the three RBCS2 introns alone had a positive effect on expression, their integration in their physiological number and order created an over-proportional stimulating effect observed in all transformants. The secretion of the luciferase protein into the medium was achieved by using the export sequence of the Chlamydomonas ARS2 gene in a cell wall deficient strain and Renilla-luciferase could be successfully concentrated with the help of attached C-terminal protein tags. Similarly, a codon adapted gene variant for human erythropoietin (crEpo) was expressed as a protein of commercial relevance. Extracellular erythropoietin produced in Chlamydomonas showed a molecular mass of 33 kDa probably resulting from post-translational modifications. Both, the increased expression levels of transgenes by integration of introns and the isolation of recombinant proteins from the culture medium are important steps towards an extended biotechnological use of this alga.

Indexed as

Gene ExpressionAnimalsChlamydomonas reinhardtiiChromatography, AffinityElectrophoresis, Polyacrylamide GelErythropoietinExtracellular SpaceImmunoblottingIntronsLuciferases, RenillaRecombinant Fusion ProteinsRibulose-Bisphosphate CarboxylaseTransgenesErythropoietinLuciferases, RenillaRecombinant Fusion ProteinsRibulose-Bisphosphate Carboxylase

Identifiers

PMID19127370
OpenAlexW1981360066

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.