Evidence map›Paper›PMID 22021638›Full record

ArticleJournal of lipid research2012

Identification and characterization of two bile acid coenzyme A transferases from Clostridium scindens, a bile acid 7α-dehydroxylating intestinal bacterium.

Jason M Ridlon, Phillip B Hylemon

Open access · hybridAbstract read
In one paragraph

Article in Journal of lipid research, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 93 papers.

0numbers the graph read from it
0cells of the map it votes in
93citing papers in PubMed
1.5field-weighted citation impact, top 17% 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

93 citing papers in PubMed, 143 citations in OpenAlex.

  1. Review
  2. Article
  3. Review
  4. Applied and environmental microbiology · 2026
    Article
  5. Bile acid signaling in health and disease.Molecular biomedicine · 2026
    Review
  6. Article
  7. Article
  8. Gut microbiota in health and disease.Molecular biomedicine · 2026
    Review
  9. Review
  10. Article
  11. Review
  12. Review
  13. Review
  14. Article
  15. Article
  16. Article
  17. Review
  18. Review
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  20. Review

33 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

2 authors at 1 institution in 1 country.

Jason M RidlonDepartment of Microbiology and Immunology, Virginia Commonwealth University, Richmond, VA, USA.
Phillip B Hylemon
Virginia Commonwealth University · US

Funding

TRANSCRIPTIONAL REGULATION OF STEROL 12-ALPHA-HYDROLASEP01DK038030 · NIDDK · VIRGINIA COMMONWEALTH UNIVERSITY · PI HYLEMON, PHILLIP B · 1987 to 2006
$6.9M
Training Grant in Digestive Diseases and Liver DiseasesT32DK007150 · NIDDK · VIRGINIA COMMONWEALTH UNIVERSITY · PI SANYAL, ARUN J · 1986 to 2017
$4.2M
NIDDK NIH HHS 2T32DK-007150-35NIDDK NIH HHS P01 DK038030NIDDK NIH HHS P01DK-38030NIDDK NIH HHS T32 DK007150
6 · The paper itself

Abstract

The human bile acid pool composition is composed of both primary bile acids (cholic acid and chenodeoxycholic acid) and secondary bile acids (deoxycholic acid and lithocholic acid). Secondary bile acids are formed by the 7α-dehydroxylation of primary bile acids carried out by intestinal anaerobic bacteria. We have previously described a multistep biochemical pathway in Clostridium scindens that is responsible for bile acid 7α-dehydroxylation. We have identified a large (12 kb) bile acid inducible (bai) operon in this bacterium that encodes eight genes involved in bile acid 7α-dehydroxylation. However, the function of the baiF gene product in this operon has not been elucidated. In the current study, we cloned and expressed the baiF gene in E. coli and discovered it has bile acid CoA transferase activity. In addition, we discovered a second bai operon encoding three genes. The baiK gene in this operon was expressed in E. coli and found to encode a second bile acid CoA transferase. Both bile acid CoA transferases were determined to be members of the type III family by amino acid sequence comparisons. Both bile acid CoA transferases had broad substrate specificity, except the baiK gene product, which failed to use lithocholyl-CoA as a CoA donor. Primary bile acids are ligated to CoA via an ATP-dependent mechanism during the initial steps of 7α-dehydroxylation. The bile acid CoA transferases conserve the thioester bond energy, saving the cell ATP molecules during bile acid 7α-dehydroxylation. ATP-dependent CoA ligation is likely quickly supplanted by ATP-independent CoA transfer.

Indexed as

Amino Acid SequenceBile Acids and SaltsCloning, MolecularClostridiumCoenzyme A-TransferasesEscherichia coliHydroxysteroid DehydrogenasesIntestinesMolecular Sequence DataMultigene FamilySubstrate Specificity7 alpha-hydroxysteroid dehydrogenaseBile Acids and SaltsCoenzyme A-TransferasesHydroxysteroid Dehydrogenases

Identifiers

PMID22021638
PMCPMC3243482
OpenAlexW2014335245

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.