Evidence map›Paper›PMID 19296042›Full record

ArticleJournal of molecular evolution2009

The PII superfamily revised: a novel group and evolutionary insights.

Fernando Hayashi Sant'Anna, Débora Broch Trentini, Shana de Souto Weber, Ricardo Cecagno, Sérgio Ceroni da Silva, Irene Silveira Schrank

Abstract read
PubMed Publisher
In one paragraph

Article in Journal of molecular evolution, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 34 papers.

0numbers the graph read from it
0cells of the map it votes in
34citing papers in PubMed
3.2field-weighted citation impact, top 8% 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

34 citing papers in PubMed, 75 citations in OpenAlex.

  1. International journal of molecular sciences · 2026
    Article
  2. Native metabolomics identifies pteridines as CutA ligands and modulators of copper binding.Proceedings of the National Academy of Sciences of the United States of America · 2025
    Article
  3. Article
  4. Article
  5. Article
  6. Article
  7. NADThe Journal of biological chemistry · 2020
    Article
  8. Article
  9. Article
  10. Article
  11. Article
  12. Article
  13. The PFrontiers in molecular biosciences · 2018
    Review
  14. Article
  15. Article
  16. The Emergence of 2-Oxoglutarate as a Master Regulator Metabolite.Microbiology and molecular biology reviews : MMBR · 2015
    Review
  17. Article
  18. Article
  19. Article
  20. 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

6 authors at 1 institution in 1 country.

Fernando Hayashi Sant'AnnaCentro de Biotecnologia, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil.
Débora Broch Trentini
Shana de Souto Weber
Ricardo Cecagno
Sérgio Ceroni da Silva
Irene Silveira Schrank
Universidade Federal do Rio Grande do Sul · BR

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The PII proteins compose a superfamily of signal transducers with fundamental roles in the nitrogen metabolism of prokaryotic organisms. They act at different cellular targets, such as ammonia transporters, enzymes, and transcriptional factors. These proteins are small, highly conserved, and well distributed among prokaryotes. The current PII classification is based on sequence similarity and genetic linkage. Our work reviewed this classification through an extensive analysis of PII homologues deposited in GenBank. We also investigated evolutionary aspects of this ancient protein superfamily and revised its PROSITE signatures. A new group of PII proteins is described in this work. These PII homologues have a peculiar genetic context, as they are associated with metal transporters and do not contain the canonical PROSITE signatures of PII. Our analysis reveals that horizontal gene transfer could have played an important role in PII evolution. Thus, new insights into PII evolution, a new PII group, and more comprehensive PROSITE signatures are proposed.

Indexed as

Evolution, MolecularAmino Acid SequenceAzospirillum brasilenseBacteriaBacterial ProteinsMolecular Sequence DataPhylogenyPII Nitrogen Regulatory ProteinsRNA, Ribosomal, 16SSequence AlignmentSequence Analysis, DNABacterial ProteinsnifL protein, BacteriaPII Nitrogen Regulatory ProteinsRNA, Ribosomal, 16S

Identifiers

PMID19296042
OpenAlexW1973387274

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.