Evidence map›Paper›PMID 17873052›Full record

ArticleJournal of bacteriology2007

Sigma factor genes sigC, sigE, and sigG are upregulated in heterocysts of the cyanobacterium Anabaena sp. strain PCC 7120.

M Ramona Aldea, Rodrigo A Mella-Herrera, James W Golden

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 21 papers.

0numbers the graph read from it
0cells of the map it votes in
21citing papers in PubMed
1.1field-weighted citation impact, top 24% 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

21 citing papers in PubMed, 42 citations in OpenAlex.

  1. Coordination of NProceedings of the National Academy of Sciences of the United States of America · 2026
    Article
  2. Article
  3. Article
  4. Article
  5. Article
  6. Article
  7. Article
  8. Article
  9. Article
  10. Article
  11. Article
  12. Article
  13. Article
  14. Article
  15. Article
  16. Cyanobacterial heterocysts.Cold Spring Harbor perspectives in biology · 2010
    Review
  17. Review
  18. Article
  19. Sigma factors for cyanobacterial transcription.Gene regulation and systems biology · 2009
    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

3 authors at 1 institution in 1 country.

M Ramona AldeaDepartment of Biology, Texas A&M University, 3258 TAMU, College Station, TX 77843-3258, USA.
Rodrigo A Mella-Herrera
James W Golden
Texas A&M University · US

Funding

Regulation of Cyanobacterial Multicellular DevelopmentR01GM036890 · NIGMS · TEXAS A&M UNIVERSITY SYSTEM · PI GOLDEN, JAMES WILLIAM · 1986 to 2007
$2.0M
NIGMS NIH HHS GM36890NIGMS NIH HHS R01 GM036890
6 · The paper itself

Abstract

We used gfp transcriptional fusions to investigate the regulation of eight sigma factor genes during heterocyst development in the cyanobacterium Anabaena sp. strain PCC 7120. Reporter strains containing gfp fusions with the upstream regions of sigB2, sigD, sigI, and sigJ did not show developmental regulation. Time-lapse microscopy of sigC, sigE, and sigG reporter strains showed increased green fluorescent protein fluorescence in differentiating cells at 4 h, 16 h, and 9 h, respectively, after nitrogen step down.

Indexed as

Gene Expression Regulation, BacterialUp-RegulationAnabaenaBacterial ProteinsDNA-Binding ProteinsSigma FactorBacterial ProteinsDNA-Binding ProteinssigC protein, BacteriasigE protein, BacteriaSigma Factor

Identifiers

PMID17873052
PMCPMC2168693
OpenAlexW2114767994

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.