Evidence map›Paper›PMID 15987779›Full record

ArticleProceedings of the National Academy of Sciences of the United States of America2005

Evolution of 3-deoxy-D-arabino-heptulosonate-7-phosphate synthase-encoding genes in the yeast Saccharomyces cerevisiae.

Kerstin Helmstaedt, Axel Strittmatter, William N Lipscomb, Gerhard H Braus

Open access · greenAbstract readComparative Study
In one paragraph

Article in Proceedings of the National Academy of Sciences of the United States of America, 2005. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 20 papers.

0numbers the graph read from it
0cells of the map it votes in
20citing papers in PubMed
0.9field-weighted citation impact, top 29% 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

20 citing papers in PubMed, 50 citations in OpenAlex.

  1. Article
  2. Article
  3. Article
  4. A comprehensive review and comparison of L-tryptophan biosynthesis inFrontiers in bioengineering and biotechnology · 2023
    Review
  5. Article
  6. International journal of molecular sciences · 2020
    Review
  7. Article
  8. Article
  9. Article
  10. Article
  11. Article
  12. Article
  13. Article
  14. The diversity of allosteric controls at the gateway to aromatic amino acid biosynthesis.Protein science : a publication of the Protein Society · 2013
    Review
  15. Article
  16. Article
  17. Article
  18. Article
  19. Article
  20. Linking high-resolution metabolic flux phenotypes and transcriptional regulation in yeast modulated by the global regulator Gcn4p.Proceedings of the National Academy of Sciences of the United States of America · 2009
    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

4 authors at 2 institutions in 2 countries.

Kerstin HelmstaedtMolekulare Mikrobiologie und Genetik, Institut für Mikrobiologie und Genetik, Grisebachstrasse 8, D-37077 Göttingen, Germany.
Axel Strittmatter
William N Lipscomb
Gerhard H Braus
Genetikum · DEHarvard University · US

Funding

STRUCTURE/FUNCTION OF BIOLOGICALLY ACTIVE MOLECULESR01GM006920 · NIGMS · HARVARD UNIVERSITY · PI LIPSCOMB, WILLIAM N · 1985 to 2003
$1.2M
STRUCTURE/FUNCTION OF BIOLOGICALLY ACTIVE MOLECULESR37GM006920 · NIGMS · HARVARD UNIVERSITY · PI LIPSCOMB, WILLIAM N · 1986 to 1995
–
NIGMS NIH HHS GM 06920NIGMS NIH HHS R01 GM006920
6 · The paper itself

Abstract

The shikimate pathway resulting in three aromatic amino acids is initiated in different organisms by two and three 3-deoxy-d-arabino-heptulosonate-7-phosphate synthases, respectively. Aro3p and Aro4p are the yeast enzymes feedback-inhibited by phenylalanine and tyrosine, respectively. A yeast strain deficient in the general control transcriptional regulatory system of amino acid biosynthesis is unable to live in the presence of high amounts of phenylalanine and tyrosine. Here, we show that this yeast strain can be rescued by the expression of aroH from Escherichia coli encoding the tryptophan-regulated AroH as third isoenzyme. Yeast carrying Ec AroH as the only enzyme for the initial step of the shikimate pathway can grow in the absence of tryptophan. Without aromatic amino acids, this yeast strain survives only when the yeast ARO3 promoter instead of the ARO4 promoter drives E. coli aroH. The detailed analysis of Aro3p and Aro4p revealed a triple feedback control by tyrosine/phenylalanine and tryptophan. Dissecting this control allowed engineering of Aro4p S195A as an enzyme, which is inhibited like AroH only by tryptophan. In addition, Aro4p variants were constructed that show an equally strong inhibition by tyrosine and tryptophan (Aro4p P165G Q302R) and in which the regulation by tyrosine and tryptophan was reversed (Aro4p P165G). Our data suggest that yeast possesses only two instead of three isogenes encoding 3-deoxy-D-arabino-heptulosonate-7-phosphate synthases because both isoenzymes can be fine tuned by tryptophan as additional effector and because transcriptional regulation by the general control system can be induced as backup when aromatic amino acids in the environment are imbalanced.

Indexed as

Evolution, Molecular3-Deoxy-7-Phosphoheptulonate SynthaseAldehyde-LyasesAmino AcidsEscherichia coliFeedback, PhysiologicalGenetic EngineeringIsoenzymesMutationPhenylalaninePromoter Regions, GeneticSaccharomyces cerevisiaeTryptophanTyrosine3-Deoxy-7-Phosphoheptulonate SynthaseAldehyde-LyasesAmino AcidsIsoenzymesPhenylalanineTryptophanTyrosine

Identifiers

PMID15987779
PMCPMC1175010
OpenAlexW1994895143

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.