Evidence map›Paper›PMID 22483065›Full record

ArticleBiochemistry2012

Olefin isomerization regiochemistries during tandem action of BacA and BacB on prephenate in bacilysin biosynthesis.

Jared B Parker, Christopher T Walsh

Open access · greenAbstract read
In one paragraph

Article in Biochemistry, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers.

0numbers the graph read from it
0cells of the map it votes in
12citing papers in PubMed
1.4field-weighted citation impact, top 20% 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

12 citing papers in PubMed, 23 citations in OpenAlex.

  1. Improvement of Bacilysin Production inJournal of microbiology and biotechnology · 2023
    Article
  2. Review
  3. Article
  4. Article
  5. Article
  6. Coupled Biosynthesis of Volatiles and Salinosporamide A in Salinispora tropica.Chembiochem : a European journal of chemical biology · 2016
    Article
  7. Review
  8. Article
  9. Review
  10. Article
  11. Article
  12. Article
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.

Jared B ParkerDepartment of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, Massachusetts 02115, United States.
Christopher T Walsh
Harvard University · US

Funding

The Vancomycin Biosynthetic Assembly lineR01GM049338 · NIGMS · HARVARD UNIVERSITY (MEDICAL SCHOOL) · PI WALSH, CHRISTOPHER T · 1993 to 2012
$6.2M
Siderophore Synthetases in Three Bacterial PathogensR01AI042738 · NIAID · HARVARD UNIVERSITY (MEDICAL SCHOOL) · PI WALSH, CHRISTOPHER T · 1998 to 2011
$5.0M
NIAID NIH HHS AI042738NIAID NIH HHS R01 AI042738NIGMS NIH HHS GM49338NIGMS NIH HHS R01 GM049338
6 · The paper itself

Abstract

BacA and BacB, the first two enzymes of the bacilysin pathway, convert prephenate to an exocylic regioisomer of dihydrohydroxyphenylpyruvate (ex-H(2)HPP) on the way to the epoxycyclohexanone warhead in the dipeptide antibiotic, bacilysin. BacA decarboxylates prephenate without aromatization, converting the 1,4-diene in prephenate to the endocyclic 1,3-diene in Δ(4),Δ(8)-dihydrohydroxyphenylpyruvate (en-H(2)HPP). BacB then performs an allylic isomerization to bring the diene into conjugation with the 2-ketone in the product Δ(3),Δ(5)-dihydrohydroxyphenylpyruvate (ex-H(2)HPP). To prove that BacA acts regiospecifically on one of the two prochiral olefins in prephenate, we generated 1,5,8-[(13)C]-chorismate from bacterial fermentation of 5-[(13)C]-glucose and in turn produced 2,4,6-[(13)C]-prephenate via chorismate mutase. Tandem action of BacA and BacB gave 2,4,8-[(13)C]-7R-ex-H(2)HPP, showing that BacA isomerizes only the pro-R double bond in prephenate. Nonenzymatic isomerization of the BacA product into conjugation gives only the Δ(3)E-geometric isomer of Δ(3),Δ(5)-ex-H(2)HPP. On the other hand, acceleration of the allylic isomerization by BacB gives a mixture of the E- and Z-geometric isomers of the 7R- product, indicating some rerouting of the flux, likely through dienolate geometric isomers.

Indexed as

AlkenesBacterial ProteinsChorismate MutaseCyclohexanecarboxylic AcidsCyclohexenesDipeptidesIsomerismAlkenesbacilysinBacterial ProteinsChorismate MutaseCyclohexanecarboxylic AcidsCyclohexenesDipeptidesprephenic acid

Identifiers

PMID22483065
PMCPMC3331721
OpenAlexW2032657826

What OpenQuestion holds

Textmetadata
LicenceTDM
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.