Evidence map›Paper›PMID 10051579›Full record

ArticleProceedings of the National Academy of Sciences of the United States of America1999

An Escherichia coli strain with all chromosomal rRNA operons inactivated: complete exchange of rRNA genes between bacteria.

T Asai, D Zaporojets, C Squires, C L Squires

Open access · greenAbstract readComparative StudyComment
In one paragraph

Article in Proceedings of the National Academy of Sciences of the United States of America, 1999. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 123 papers.

0numbers the graph read from it
0cells of the map it votes in
123citing papers in PubMed
6.6field-weighted citation impact, top 2% 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

123 citing papers in PubMed, 269 citations in OpenAlex.

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  8. Frontiers in genetics · 2024
    Review
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  15. Translational demand is not a major source of plasmid-associated fitness costs.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2022
    Article
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63 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

4 authors at 2 institutions in 1 country.

T AsaiDepartment of Molecular Biology and Microbiology, Tufts University School of Medicine, Boston, MA 02111, USA.
D Zaporojets
C Squires
C L Squires
University of Wisconsin–Madison · USMassachusetts General Hospital · US

Funding

FUSION OF THE RIBOSOMAL RNA PROMOTER TO OTHER OPERONSR01GM024751 · NIGMS · TUFTS UNIVERSITY BOSTON · PI SQUIRES, CATHERINE L · 1985 to 2007
$4.0M
NIGMS NIH HHS GM24751NIGMS NIH HHS R01 GM024751
6 · The paper itself

Abstract

Current global phylogenies are built predominantly on rRNA sequences. However, an experimental system for studying the evolution of rRNA is not readily available, mainly because the rRNA genes are highly repeated in most experimental organisms. We have constructed an Escherichia coli strain in which all seven chromosomal rRNA operons are inactivated by deletions spanning the 16S and 23S coding regions. A single E. coli rRNA operon carried by a multicopy plasmid supplies 16S and 23S rRNA to the cell. By using this strain we have succeeded in creating microorganisms that contain only a foreign rRNA operon derived from either Salmonella typhimurium or Proteus vulgaris, microorganisms that have diverged from E. coli about 120-350 million years ago. We also were able to replace the E. coli rRNA operon with an E. coli/yeast hybrid one in which the GTPase center of E. coli 23S rRNA had been substituted by the corresponding domain from Saccharomyces cerevisiae. These results suggest that, contrary to common belief, coevolution of rRNA with many other components in the translational machinery may not completely preclude the horizontal transfer of rRNA genes.

Indexed as

Genes, BacterialOperonBase SequenceChromosomes, BacterialEscherichia coliPolymerase Chain ReactionRestriction MappingRNA, BacterialRNA, RibosomalRNA, Ribosomal, 16SRNA, Ribosomal, 23SSalmonella typhimuriumSequence DeletionRNA, BacterialRNA, RibosomalRNA, Ribosomal, 16SRNA, Ribosomal, 23S

Identifiers

PMID10051579
PMCPMC26721
OpenAlexW2151234959

What OpenQuestion holds

Texttitle and abstract
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.