Evidence map›Paper›PMID 19783815›Full record

ArticleNucleic acids research2009

The single polypeptide restriction-modification enzyme LlaGI is a self-contained molecular motor that translocates DNA loops.

Rachel M Smith, Jytte Josephsen, Mark D Szczelkun

Abstract read
In one paragraph

Article in Nucleic acids research, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers.

0numbers the graph read from it
0cells of the map it votes in
14citing papers in PubMed
–field-weighted citation impact
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

14 citing papers in PubMed.

  1. Article
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  8. Review
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  10. Article
  11. Sequence-specific assembly of FtsK hexamers establishes directional translocation on DNA.Proceedings of the National Academy of Sciences of the United States of America · 2010
    Article
  12. Article
  13. Article
  14. 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.

Rachel M SmithDNA-Protein Interactions Unit, Department of Biochemistry, School of Medical Sciences, University of Bristol, Bristol, BS8 1TD, UK.
Jytte Josephsen
Mark D Szczelkun

Funding

Biotechnology and Biological Sciences Research Council BB/D009715/1Wellcome Trust 067439
6 · The paper itself

Abstract

To cleave DNA, the single polypeptide restriction-modification enzyme LlaGI must communicate between a pair of indirectly repeated recognition sites. We demonstrate that this communication occurs by a 1-dimensional route, namely unidirectional dsDNA loop translocation rightward of the specific recognition sequence 5'-CTnGAyG-3' as written (where n is either A, G, C or T and y is either C or T). Motion across thousands of base pairs is catalysed by the helicase domain and requires the hydrolysis of 1.5-2 ATP per base pair. DNA loop extrusion is accompanied by changes in DNA twist consistent with the motor following the helical pitch of the polynucleotide track. LlaGI is therefore an example of a polypeptide that is a completely self-contained, multi-functional molecular machine.

Indexed as

Adenosine TriphosphateBiological TransportDNADNA, CatenatedDNA Restriction EnzymesDNA Restriction-Modification EnzymesNucleic Acid ConformationAdenosine TriphosphateDNADNA, CatenatedDNA Restriction EnzymesDNA Restriction-Modification EnzymesLlaGI restriction-modification system

Identifiers

PMID19783815
PMCPMC2790907

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC
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.