Evidence map›Paper›PMID 19447952›Full record

ArticleApplied and environmental microbiology2009

Genetic modification of carbon catabolite repression in Trichoderma reesei for improved protein production.

Tiina Nakari-Setälä, Marja Paloheimo, Jarno Kallio, Jari Vehmaanperä, Merja Penttilä, Markku Saloheimo

Open access · greenAbstract read
In one paragraph

Article in Applied and environmental microbiology, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 72 papers.

0numbers the graph read from it
0cells of the map it votes in
72citing papers in PubMed
5.7field-weighted citation impact, top 4% 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

72 citing papers in PubMed, 205 citations in OpenAlex.

  1. Design and Heterologous Production of Bagworm Silk-Inspired Proteins inComputational and structural biotechnology journal · 2026
    Article
  2. Robust Production of Cellulases to Develop a Low-Cost Sugar Platform.Advances in biochemical engineering/biotechnology · 2026
    Review
  3. Article
  4. Article
  5. Article
  6. Article
  7. Article
  8. Article
  9. Article
  10. Promoters and Synthetic Promoters in Trichoderma reesei.Methods in molecular biology (Clifton, N.J.) · 2024
    Article
  11. Article
  12. Article
  13. Article
  14. Review
  15. A Combined Study on Optimization,Biochemistry research international · 2022
    Review
  16. Article
  17. Article
  18. Article
  19. Article
  20. Induction and Repression of Hydrolase Genes inFrontiers in microbiology · 2021
    Review

12 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

6 authors at 2 institutions in 1 country.

Tiina Nakari-SetäläVTT Technical Research Centre, P.O. Box 1000, FI-02044 VTT, Espoo, Finland.
Marja Paloheimo
Jarno Kallio
Jari Vehmaanperä
Merja Penttilä
Markku Saloheimo
Roal (Finland) · FIVTT Technical Research Centre of Finland · FI

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The cellulase and hemicellulase genes of the filamentous fungus Trichoderma reesei have been shown to be under carbon catabolite repression mediated by the regulatory gene cre1. In this study, strains were constructed in which the cre1 gene was either completely removed or replaced by a truncated mutant variant, cre1-1, found previously in the Rut-C30 mutant strain with enhanced enzyme production capability. The T. reesei transformants with either deletion or truncation of cre1 had clearly altered colony morphology compared with the parental strains, forming smaller colonies and fewer aerial hyphae and spores. Liquid cultures in a medium with glucose as a carbon source showed that the transformants were derepressed in cellulase and hemicellulase production. Interestingly, they also produced significantly elevated levels of these hydrolytic enzymes in fermentations carried out in a medium inducing the hydrolase genes. This suggests that cre1 acts as a modulator of cellulase and hemicellulase gene expression under both noninducing and inducing conditions. There was no phenotypic difference between the Deltacre1 and cre1-1 mutant strains in any of the experiments done, indicating that the cre1-1 gene is practically a null allele. The results of this work indicate that cre1 is a valid target gene in strain engineering for improved enzyme production in T. reesei.

Indexed as

Carbohydrate MetabolismGene Expression Regulation, FungalCellulaseFungal ProteinsGene DeletionGene Knockout TechniquesGlycoside HydrolasesHyphaeTrichodermaCellulaseFungal ProteinsGlycoside Hydrolaseshemicellulase

Identifiers

PMID19447952
PMCPMC2708423
OpenAlexW2136464092

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.