Evidence map›Paper›PMID 17693492›Full record

ArticleJournal of bacteriology2007

Characterization of an acid-dependent arginine decarboxylase enzyme from Chlamydophila pneumoniae.

Teresa N Giles, David E Graham

Open access · greenAbstract read
In one paragraph

Article in Journal of bacteriology, 2007. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers.

0numbers the graph read from it
0cells of the map it votes in
14citing papers in PubMed
0.7field-weighted citation impact, top 32% 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

14 citing papers in PubMed, 23 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

2 authors at 1 institution in 1 country.

Teresa N GilesDepartment of Chemistry and Biochemistry, University of Texas at Austin, 1 University Station A5300, Austin, TX 78712, USA.
David E Graham
The University of Texas at Austin · US

Funding

Pilot Project ProgramP30ES007784 · NIEHS · UNIVERSITY OF TX MD ANDERSON CAN CTR · PI RICHIE, ELLEN R · 1996 to 2011
$16.4M
Archaeal gene recruitment by the ChlamydialesR21AI064444 · NIAID · UNIVERSITY OF TEXAS AT AUSTIN · PI GRAHAM, DAVID E · 2007 to 2008
$405k
NIAID NIH HHS AI064444NIAID NIH HHS R21 AI064444NIEHS NIH HHS ES07784NIEHS NIH HHS P30 ES007784
6 · The paper itself

Abstract

Genome sequences from members of the Chlamydiales encode diverged homologs of a pyruvoyl-dependent arginine decarboxylase enzyme that nonpathogenic euryarchaea use in polyamine biosynthesis. The Chlamydiales lack subsequent genes required for polyamine biosynthesis and probably obtain polyamines from their host cells. To identify the function of this protein, the CPn1032 homolog from the respiratory pathogen Chlamydophila pneumoniae was heterologously expressed and purified. This protein self-cleaved to form a reactive pyruvoyl group, and the subunits assembled into a thermostable (alphabeta)(3) complex. The mature enzyme specifically catalyzed the decarboxylation of L-arginine, with an unusually low pH optimum of 3.4. The CPn1032 gene complemented a mutation in the Escherichia coli adiA gene, which encodes a pyridoxal 5'-phosphate-dependent arginine decarboxylase, restoring arginine-dependent acid resistance. Acting together with a putative arginine-agmatine antiporter, the CPn1032 homologs may have evolved convergently to form an arginine-dependent acid resistance system. These genes are the first evidence that obligately intracellular chlamydiae may encounter acidic conditions. Alternatively, this system could reduce the host cell arginine concentration and produce inhibitors of nitric oxide synthase.

Indexed as

AcidsAdaptation, PhysiologicalAmino Acid SequenceAnti-Bacterial AgentsArginineCarboxy-LyasesChlamydialesChlamydophila pneumoniaeCloning, MolecularDrug Resistance, BacterialEnzyme StabilityEscherichia coliGene DeletionGenetic Complementation TestHydrogen-Ion ConcentrationMolecular Sequence DataAcidsAnti-Bacterial AgentsArgininearginine decarboxylaseCarboxy-LyasesProtein SubunitsRecombinant Proteins

Identifiers

PMID17693492
PMCPMC2168457
OpenAlexW2045497769

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.