Evidence map›Paper›PMID 23831434›Full record

ArticleProtein expression and purification2013

Purification of bacteriophage lambda repressor.

Ning Gao, Keith Shearwin, John Mack, Laura Finzi, David Dunlap

Abstract read
In one paragraph

Article in Protein expression and purification, 2013. 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
1.3field-weighted citation impact, top 19% 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, 11 citations in OpenAlex.

  1. Article
  2. Article
  3. Article
  4. Article
  5. Article
  6. Article
  7. DNA supercoiling: a regulatory signal for the λ repressor.Proceedings of the National Academy of Sciences of the United States of America · 2014
    Article
  8. Quantitation of interactions between two DNA loops demonstrates loop domain insulation in E. coli cells.Proceedings of the National Academy of Sciences of the United States of America · 2014
    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

5 authors at 2 institutions in 2 countries.

Ning GaoPhysics Department, Emory University, 400 Dowman Dr., Atlanta, GA 30322, United States.
Keith Shearwin
John Mack
Laura Finzi
David Dunlap
Emory University · USUniversity of Adelaide · AU

Funding

The lambda bacteriophage regulatory loopR01GM084070 · NIGMS · EMORY UNIVERSITY · PI FINZI, LAURA · 2009 to 2021
$4.1M
NIGMS NIH HHS R01 GM084070PHS HHS RGM084070A
6 · The paper itself

Abstract

Bacteriophage lambda repressor controls the lysogeny/lytic growth switch after infection of E. coli by lambda phage. In order to study in detail the looping of DNA mediated by the protein, tag-free repressor and a loss-of-cooperativity mutant were expressed in E.coli and purified by (1) ammonium sulfate fractionation, (2) anion-exchange chromatography and (3) heparin affinity chromatography. This method employs more recently developed and readily available chromatography resins to produce highly pure protein in good yield. In tethered particle motion looping assays and atomic force microscopy "footprinting" assays, both the wild-type protein and a C-terminal His-tagged variant, purified using immobilized metal affinity chromatography, bound specifically to high affinity sites to mediate loop formation. In contrast the G147D loss-of-cooperativity mutant bound specifically but did not secure loops.

Indexed as

Ammonium SulfateBacteriophage lambdaChromatography, AffinityChromatography, Ion ExchangeEscherichia coliRecombinant Fusion ProteinsRepressor ProteinsViral Regulatory and Accessory ProteinsAmmonium Sulfatephage repressor proteinsRecombinant Fusion ProteinsRepressor ProteinsViral Regulatory and Accessory ProteinsAmmonium sulfateAnion exchangeBacteriophage lambdaHeparin affinityHis-tagLambda repressorSingle particle trackingTethered particle motion

Identifiers

PMID23831434
PMCPMC3761395
OpenAlexW2077293003

What OpenQuestion holds

Textmetadata
LicenceTDM
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.