Evidence map›Paper›PMID 14702312›Full record

ArticleJournal of bacteriology2004

Occurrence and characterization of mercury resistance in the hyperthermophilic archaeon Sulfolobus solfataricus by use of gene disruption.

James Schelert, Vidula Dixit, Viet Hoang, Jessica Simbahan, Melissa Drozda, Paul Blum

Open access · greenAbstract read
In one paragraph

Article in Journal of bacteriology, 2004. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 63 papers.

0numbers the graph read from it
0cells of the map it votes in
63citing papers in PubMed
4.2field-weighted citation impact, top 6% 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

63 citing papers in PubMed, 161 citations in OpenAlex.

  1. Article
  2. Article
  3. Review
  4. Progress and Challenges in Archaeal Cell Biology.Methods in molecular biology (Clifton, N.J.) · 2022
    Article
  5. Article
  6. Review
  7. Expanded Diversity and Phylogeny ofFrontiers in microbiology · 2021
    Article
  8. Review
  9. Article
  10. Nonmutational mechanism of inheritance in the ArchaeonProceedings of the National Academy of Sciences of the United States of America · 2018
    Article
  11. Biotechnology of extremely thermophilic archaea.FEMS microbiology reviews · 2018
    Review
  12. Article
  13. Review
  14. Diversity and Niche of Archaea in Bioremediation.Archaea (Vancouver, B.C.) · 2018
    Review
  15. Article
  16. Article
  17. Article
  18. Review
  19. Article
  20. Article

3 more citing papers are in PubMed but not listed here.

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.

James SchelertBeadle Center for Genetics, University of Nebraska, Lincoln, Nebraska 68588-0666, USA.
Vidula Dixit
Viet Hoang
Jessica Simbahan
Melissa Drozda
Paul Blum
University of Nebraska–Lincoln · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Mercury resistance mediated by mercuric reductase (MerA) is widespread among bacteria and operates under the control of MerR. MerR represents a unique class of transcription factors that exert both positive and negative regulation on gene expression. Archaea and bacteria are prokaryotes, yet little is known about the biological role of mercury in archaea or whether a resistance mechanism occurs in these organisms. The archaeon Sulfolobus solfataricus was sensitive to mercuric chloride, and low-level adaptive resistance could be induced by metal preconditioning. Protein phylogenetic analysis of open reading frames SSO2689 and SSO2688 clarified their identity as orthologs of MerA and MerR. Northern analysis established that merA transcription responded to mercury challenge, since mRNA levels were transiently induced and, when normalized to 7S RNA, approximated values for other highly expressed transcripts. Primer extension analysis of merA mRNA predicted a noncanonical TATA box with nonstandard transcription start site spacing. The functional roles of merA and merR were clarified further by gene disruption. The merA mutant exhibited mercury sensitivity relative to wild type and was defective in elemental mercury volatilization, while the merR mutant was mercury resistant. Northern analysis of the merR mutant revealed merA transcription was constitutive and that transcript abundance was at maximum levels. These findings constitute the first report of an archaeal heavy metal resistance system; however, unlike bacteria the level of resistance is much lower. The archaeal system employs a divergent MerR protein that acts only as a negative transcriptional regulator of merA expression.

Indexed as

Adaptation, PhysiologicalAmino Acid SequenceBacterial ProteinsBase SequenceDNA-Binding ProteinsGene Expression Regulation, BacterialMercuryMolecular Sequence DataPhylogenySulfolobusTATA BoxTranscription, GeneticBacterial ProteinsDNA-Binding ProteinsMercuryMerR protein, Bacteria

Identifiers

PMID14702312
PMCPMC305765
OpenAlexW2153666407

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.