Evidence map›Paper›PMID 11237856›Full record

ArticleThe Biochemical journal2001

Expression pattern and localization of beta,beta-carotene 15,15'-dioxygenase in different tissues.

A Wyss, G M Wirtz, W D Woggon, R Brugger, M Wyss, A Friedlein, G Riss, H Bachmann, W Hunziker

Open access · bronzeAbstract read
In one paragraph

Article in The Biochemical journal, 2001. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 33 papers.

0numbers the graph read from it
0cells of the map it votes in
33citing papers in PubMed
3.6field-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

33 citing papers in PubMed, 110 citations in OpenAlex.

  1. Article
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  3. Retinoic acid production via the ray-finned fish genebioRxiv : the preprint server for biology · 2025
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  6. Beta-carotene and its protective effect on gastric cancer.World journal of clinical cases · 2021
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  7. Carotenoid metabolism at the intestinal barrier.Biochimica et biophysica acta. Molecular and cell biology of lipids · 2020
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  8. Review
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  10. RPE65 has an additional function as the lutein toProceedings of the National Academy of Sciences of the United States of America · 2017
    Article
  11. Article
  12. Article
  13. Article
  14. Article
  15. Article
  16. The multifaceted nature of retinoid transport and metabolism.Hepatobiliary surgery and nutrition · 2014
    Review
  17. Review
  18. Review
  19. Article
  20. Lycopene metabolism and its biological significance.The American journal of clinical nutrition · 2012
    Review
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

9 authors at 2 institutions in 1 country.

A WyssF. Hoffmann-La Roche Ltd., Vitamins & Fine Chemicals Division, 4070 Basel, Switzerland. adrian.wyss@roche.com
G M Wirtz
W D Woggon
R Brugger
M Wyss
A Friedlein
G Riss
H Bachmann
W Hunziker
Roche (Switzerland) · CHUniversity of Basel · CH

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Beta,beta-carotene 15,15'-dioxygenase cleaves beta,beta-carotene into two molecules of retinal, and is the key enzyme in the metabolism of beta,beta-carotene to vitamin A. The enzyme has been known for more than 40 years, yet all attempts to purify the protein to homogeneity have failed. Recently, the successful cloning and sequencing of an enzyme with beta,beta-carotene 15,15'-dioxygenase activity from chicken, as well as from Drosophila, has been reported. Here, we describe in detail our attempt to enrich the chicken beta,beta-carotene 15,15'-dioxygenase to such an extent as to allow determination of partial amino acid sequences, which were then used to design degenerate oligonucleotides. Screening of a chicken duodenal expression library yielded a full-length clone containing a coding sequence of 1578 bp. Functional expression in Escherichia coli and in eukaryotic cell lines confirmed that we had cloned the first vertebrate dioxygenase that cleaves beta,beta-carotene at the central 15,15'-double bond. By performing a sequence homology search, the cDNA sequence of the mouse homologue was found as an expressed sequence tag (EST) in the gene bank. At the amino-acid level, the degree of homology between the chicken and mouse sequences is 81%. Thus beta,beta-carotene 15,15'-dioxygenase can be considered as being an enzyme that is evolutionarily rather well conserved. We established the expression pattern of beta,beta-carotene 15,15'-dioxygenase in chicken and mouse tissues with a combination of Northern blots and in situ hybridization. The mRNA for beta,beta-carotene 15,15'-dioxygenase was localized primarily in duodenal villi, as well as in liver and in tubular structures of lung and kidney. These new findings demonstrate that beta,beta-carotene 15,15'-dioxygenase is also expressed in epithelial structures, where it serves to provide the tissue-specific vitamin A supply.

Indexed as

Amino Acid SequenceAnimalsbeta-Carotene 15,15'-MonooxygenaseBlotting, NorthernChickensCHO CellsCloning, MolecularCricetinaeEpithelial CellsIn Situ HybridizationIntestinal MucosaMiceMolecular Sequence DataOxygenasesRNA, MessengerSequence Homology, Amino AcidBco1 protein, mousebeta-Carotene 15,15'-MonooxygenaseOxygenasesRNA, Messenger

Identifiers

PMID11237856
PMCPMC1221683
OpenAlexW114018547

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.