Evidence map›Paper›PMID 19436048›Full record

ArticleJournal of experimental botany2009

Cloning and functional characterization of carotenoid cleavage dioxygenase 4 genes.

Fong-Chin Huang, Péter Molnár, Wilfried Schwab

Open access · hybridAbstract read
In one paragraph

Article in Journal of experimental botany, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 92 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
92citing papers in PubMed, 1 pooled it
4.8field-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

92 citing papers in PubMed, 1 synthesis or guideline pooled it, 239 citations in OpenAlex.

  1. Pooled it
  2. Article
  3. Article
  4. Review
  5. Evolutionary adaptation of CCD4 enzymes inFrontiers in plant science · 2026
    Article
  6. Article
  7. Article
  8. Carotenoid Cleavage Dioxygenase GeneInternational journal of molecular sciences · 2024
    Article
  9. Article
  10. Article
  11. Article
  12. Article
  13. Article
  14. Characterization ofPlants (Basel, Switzerland) · 2023
    Article
  15. Article
  16. A cytosolic bifunctional geranyl/farnesyl diphosphate synthase provides MVA-derived GPP for geraniol biosynthesis in rose flowers.Proceedings of the National Academy of Sciences of the United States of America · 2023
    Article
  17. Article
  18. Article
  19. Article
  20. Genetic and Biochemical Aspects of Floral Scents in Roses.International journal of molecular sciences · 2022
    Review

32 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

3 authors at 2 institutions in 2 countries.

Fong-Chin HuangBiomolecular Food Technology, Technische Universität München, Hochfeldweg 1, D-85354 Freising, Germany.
Péter Molnár
Wilfried Schwab
Technical University of Munich · DEUniversity of Pecs · HU

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Although a number of plant carotenoid cleavage dioxygenase (CCD) genes have been functionally characterized in different plant species, little is known about the biochemical role and enzymatic activities of members of the subclass 4 (CCD4). To gain insight into their biological function, CCD4 genes were isolated from apple (Malus x domestica, MdCCD4), chrysanthemum (Chrysanthemum x morifolium, CmCCD4a), rose (Rosa x damascena, RdCCD4), and osmanthus (Osmanthus fragrans, OfCCD4), and were expressed, together with AtCCD4, in Escherichia coli. In vivo assays showed that CmCCD4a and MdCCD4 cleaved beta-carotene well to yield beta-ionone, while OfCCD4, RdCCD4, and AtCCD4 were almost inactive towards this substrate. No cleavage products were found for any of the five CCD4 genes when they were co-expressed in E. coli strains that accumulated cis-zeta-carotene and lycopene. In vitro assays, however, demonstrated the breakdown of 8'-apo-beta-caroten-8'-al by AtCCD4 and RdCCD4 to beta-ionone, while this apocarotenal was almost not degraded by OfCCD4, CmCCD4a, and MdCCD4. Sequence analysis of genomic clones of CCD4 genes revealed that RdCCD4, like AtCCD4, contains no intron, while MdCCD, OfCCD4, and CmCCD4a contain introns. These results indicate that plants produce at least two different forms of CCD4 proteins. Although CCD4 enzymes cleave their substrates at the same position (9,10 and 9',10'), they might have different biochemical functions as they accept different (apo)-carotenoid substrates, show various expression patterns, and are genomically differently organized.

Indexed as

Cloning, MolecularAmino Acid SequenceCarotenoidsDioxygenasesMalusMolecular Sequence DataPhylogenyPlant ProteinsPlantsSequence Homology, Amino AcidCarotenoidsDioxygenasesPlant Proteins

Identifiers

PMID19436048
PMCPMC2718213
OpenAlexW2108830375

What OpenQuestion holds

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LicenceCC BY-NC
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.