Evidence map›Paper›PMID 19556970›Full record

ArticleThe EMBO journal2009

Structure and function of a complex between chorismate mutase and DAHP synthase: efficiency boost for the junior partner.

Severin Sasso, Mats Okvist, Kathrin Roderer, Marianne Gamper, Giosiana Codoni, Ute Krengel, Peter Kast

Open access · bronzeAbstract read
In one paragraph

Article in The EMBO journal, 2009. 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
1.7field-weighted citation impact, top 16% 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, 60 citations in OpenAlex.

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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

7 authors at 2 institutions in 2 countries.

Severin SassoLaboratory of Organic Chemistry, ETH Zurich, CH-8093 Zurich, Switzerland.
Mats Okvist
Kathrin Roderer
Marianne Gamper
Giosiana Codoni
Ute Krengel
Peter Kast
University of Oslo · NOETH Zurich · CH

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Chorismate mutase catalyzes a key step in the shikimate biosynthetic pathway towards phenylalanine and tyrosine. Curiously, the intracellular chorismate mutase of Mycobacterium tuberculosis (MtCM; Rv0948c) has poor activity and lacks prominent active-site residues. However, its catalytic efficiency increases >100-fold on addition of DAHP synthase (MtDS; Rv2178c), another shikimate-pathway enzyme. The 2.35 A crystal structure of the MtCM-MtDS complex bound to a transition-state analogue shows a central core formed by four MtDS subunits sandwiched between two MtCM dimers. Structural comparisons imply catalytic activation to be a consequence of the repositioning of MtCM active-site residues on binding to MtDS. The mutagenesis of the C-terminal extrusion of MtCM establishes conserved residues as part of the activation machinery. The chorismate-mutase activity of the complex, but not of MtCM alone, is inhibited synergistically by phenylalanine and tyrosine. The complex formation thus endows the shikimate pathway of M. tuberculosis with an important regulatory feature. Experimental evidence suggests that such non-covalent enzyme complexes comprising an AroQ(delta) subclass chorismate mutase like MtCM are abundant in the bacterial order Actinomycetales.

Indexed as

3-Deoxy-7-Phosphoheptulonate SynthaseAmino Acid SequenceCatalytic DomainChorismate MutaseCloning, MolecularCorynebacterium glutamicumCrystallography, X-RayEnzyme ActivationMalatesModels, MolecularMolecular Sequence DataMycobacterium tuberculosisPhenylalanineSequence AlignmentShikimic AcidTyrosine3-Deoxy-7-Phosphoheptulonate SynthaseChorismate MutaseMalatesmalic acidPhenylalanineShikimic AcidTyrosine

Identifiers

PMID19556970
PMCPMC2718287
OpenAlexW2031123776

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.