Evidence map›Paper›PMID 9765573›Full record

ArticleJournal of bacteriology1998

Molecular cloning and expression analysis of the Rhodobacter capsulatus sodB gene, encoding an iron superoxide dismutase.

N Cortez, N Carrillo, C Pasternak, A Balzer, G Klug

Open access · bronzeAbstract readComparative Study
In one paragraph

Article in Journal of bacteriology, 1998. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.

0numbers the graph read from it
0cells of the map it votes in
8citing papers in PubMed
1.2field-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

8 citing papers in PubMed, 27 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

5 authors at 3 institutions in 2 countries.

N CortezPrograma Multidisciplinario de Biología Experimental (PROMUBIE), National University of Rosario and CONICET, RA2000 Rosario, Argentina cortez@arnet.com.ar
N Carrillo
C Pasternak
A Balzer
G Klug
University of Giessen · DEConsejo Nacional de Investigaciones Científicas y Técnicas · ARNational University of Rosario · AR

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Genetic complementation of a sodA sodB Escherichia coli mutant strain was used to clone Rhodobacter capsulatus genes involved in detoxification of superoxide radicals. After sequence analysis, 1 of the 16 identical clones obtained by this selection procedure was shown to contain an open reading frame with sequence similarity to that coding for Fe-containing superoxide dismutases (SodB). The R. capsulatus sodB gene was expressed in E. coli, and the nature of the metal ligand was confirmed by inhibitor sensitivity assays with lysates from both bacterial species. Activity staining of cleared Rhodobacter lysates resolved by polyacrylamide gel electrophoresis indicated that SodB was the only superoxide dismutase present in this phototrophic organism. The sodB gene was expressed at low levels in R. capsulatus cells grown under anaerobic or semiaerobic conditions, but expression was strongly induced upon exposure of the bacteria to air or to methyl viologen. Attempts to construct a sodB mutant in this organism by allelic exchange of the chromosomal copy of the gene with a suicide plasmid containing a mutated sodB gene were unsuccessful, strongly suggesting that the encoded superoxide dismutase is essential for viability of R. capsulatus in aerobic cultures.

Indexed as

Genes, BacterialIronAerobiosisAmino Acid SequenceBacterial ProteinsCloning, MolecularDrug ResistanceGene Expression Regulation, BacterialGenes, EssentialGenetic Complementation TestMetalloproteinsMolecular Sequence DataOxidantsOxidative StressRhodobacter capsulatusSequence Analysis, DNABacterial ProteinsIronMetalloproteinsOxidantsSodB protein, BacteriaSuperoxide DismutaseSuperoxides

Identifiers

PMID9765573
PMCPMC107590
OpenAlexW2158548760

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.