Evidence map›Paper›PMID 31679177›Full record

ArticleThe FEBS journal2020

Structure and activity of PPX/GppA homologs from Escherichia coli and Helicobacter pylori.

He Song, Madushini N Dharmasena, Chao Wang, Gary X Shaw, Scott Cherry, Joseph E Tropea, Ding J Jin, Xinhua Ji

Open access · greenAbstract read
In one paragraph

Article in The FEBS journal, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 18 papers.

0numbers the graph read from it
0cells of the map it votes in
18citing papers in PubMed
1.4field-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

18 citing papers in PubMed, 30 citations in OpenAlex.

  1. Article
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  3. Inorganic Polyphosphate and Human Diseases.Progress in molecular and subcellular biology · 2026
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  5. Molecular turn inEmerging microbes & infections · 2025
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  6. Microbiology spectrum · 2025
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  7. Review
  8. Article
  9. Structural Evolution of Bacterial Polyphosphate Degradation Enzyme for Phosphorus Cycling.Advanced science (Weinheim, Baden-Wurttemberg, Germany) · 2024
    Article
  10. Article
  11. Review
  12. Article
  13. Genomic Analysis ofGenes · 2022
    Article
  14. Article
  15. Review
  16. Article
  17. Functional Insights Into the Role ofFrontiers in microbiology · 2020
    Article
  18. 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

8 authors at 2 institutions in 1 country.

He SongMacromolecular Crystallography Laboratory, National Cancer Institute, Frederick, MD, USA.
Madushini N DharmasenaRNA Biology Laboratory, National Cancer Institute, Frederick, MD, USA.
Chao WangMacromolecular Crystallography Laboratory, National Cancer Institute, Frederick, MD, USA.
Gary X ShawMacromolecular Crystallography Laboratory, National Cancer Institute, Frederick, MD, USA.
Scott CherryMacromolecular Crystallography Laboratory, National Cancer Institute, Frederick, MD, USA.
Joseph E TropeaMacromolecular Crystallography Laboratory, National Cancer Institute, Frederick, MD, USA.
Ding J JinRNA Biology Laboratory, National Cancer Institute, Frederick, MD, USA.
Xinhua JiMacromolecular Crystallography Laboratory, National Cancer Institute, Frederick, MD, USA.ORCID 0000-0001-6942-1514
National Institutes of Health · USFrederick National Laboratory for Cancer Research · US

Funding

Biomolecular Structure and Mechanism, Structure-Based Drug DesignZIABC010326 · NCI · DIVISION OF BASIC SCIENCES - NCI · PI JI, XINHUA · 2009 to 2024
$27.3M
Protein Purification CoreZICBC011016 · NCI · DIVISION OF BASIC SCIENCES - NCI · PI TROPEA, JOSEPH · 2009 to 2021
$11.0M
Intramural NIH HHS ZIA BC010326
6 · The paper itself

Abstract

Rapid adaptation to environmental changes is crucial for bacterial survival. Almost all bacteria possess a conserved stringent response system to prompt transcriptional and metabolic responses toward stress. The adaptive process relies on alarmones, guanosine pentaphosphate (pppGpp), and tetraphosphate (ppGpp), to regulate global gene expression. The ppGpp is more potent than pppGpp in the regulatory activity, and pppGpp phosphohydrolase (GppA) plays a key role in (p)ppGpp homeostasis. Sharing a similar domain structure, GppA is indistinguishable from exopolyphosphatase (PPX), which mediates the metabolism of cellular inorganic polyphosphate. Here, our phylogenetic analysis of PPX/GppA homologs in bacteria shows a wide distribution with several distinct subfamilies, and our structural and functional analysis of Escherichia coli GppA and Helicobacter pylori PPX/GppA reveals unique properties of each homolog. These results explain how each homolog possesses its distinct functionality.

Indexed as

Acid Anhydride HydrolasesAmino Acid SequenceEscherichia coliGuanosine PentaphosphateHelicobacter pyloriModels, MolecularMolecular StructurePhosphoric Monoester HydrolasesSequence AlignmentAcid Anhydride HydrolasesexopolyphosphataseGuanosine PentaphosphatePhosphoric Monoester Hydrolasesexopolyphosphataseguanosine pentaphosphateguanosine pentaphosphate phosphohydrolaseguanosine tetraphosphateHelicobacter pylori

Identifiers

PMID31679177
PMCPMC8189163
OpenAlexW2986447921

What OpenQuestion holds

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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.