Evidence map›Paper›PMID 22961247›Full record

ArticleNature methods2012

A general approach to break the concentration barrier in single-molecule imaging.

Anna B Loveland, Satoshi Habuchi, Johannes C Walter, Antoine M van Oijen

Abstract read
In one paragraph

Article in Nature methods, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 48 papers.

0numbers the graph read from it
0cells of the map it votes in
48citing 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

48 citing papers in PubMed.

  1. Article
  2. Article
  3. Eukaryotic Lagging Strand Synthesis is Distributive.bioRxiv : the preprint server for biology · 2025
    Article
  4. Article
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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

4 authors.

Anna B LovelandDepartment of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, Massachusetts, USA.
Satoshi Habuchi
Johannes C Walter
Antoine M van Oijen

Funding

MOLECULAR BIOPHYSICS TRAINING GRANTT32GM008313 · NIGMS · HARVARD UNIVERSITY (MEDICAL SCHOOL) · PI MURTHY, VENKATESH N · 1989 to 2023
$14.6M
Properties of the eukaryotic replicative DNA helicaseR01GM062267 · NIGMS · HARVARD UNIVERSITY (MEDICAL SCHOOL) · PI WALTER, JOHANNES · 2001 to 2014
$4.1M
Single-molecule enzymology of the replisomeR01GM077248 · NIGMS · HARVARD MEDICAL SCHOOL · PI VAN OIJEN, ANTOINE M · 2007 to 2011
$1.2M
NIGMS NIH HHS GM077248NIGMS NIH HHS GM62267NIGMS NIH HHS R01 GM062267NIGMS NIH HHS R01 GM077248NIGMS NIH HHS T32 GM008313
6 · The paper itself

Abstract

Single-molecule fluorescence imaging is often incompatible with physiological protein concentrations, as fluorescence background overwhelms an individual molecule's signal. We solve this problem with a new imaging approach called PhADE (PhotoActivation, Diffusion and Excitation). A protein of interest is fused to a photoactivatable protein (mKikGR) and introduced to its surface-immobilized substrate. After photoactivation of mKikGR near the surface, rapid diffusion of the unbound mKikGR fusion out of the detection volume eliminates background fluorescence, whereupon the bound molecules are imaged. We labeled the eukaryotic DNA replication protein flap endonuclease 1 with mKikGR and added it to replication-competent Xenopus laevis egg extracts. PhADE imaging of high concentrations of the fusion construct revealed its dynamics and micrometer-scale movements on individual, replicating DNA molecules. Because PhADE imaging is in principle compatible with any photoactivatable fluorophore, it should have broad applicability in revealing single-molecule dynamics and stoichiometry of macromolecular protein complexes at previously inaccessible fluorophore concentrations.

Indexed as

DiffusionDNA ReplicationFlap EndonucleasesLuminescent ProteinsMicroscopy, FluorescenceProliferating Cell Nuclear AntigenFlap EndonucleasesLuminescent ProteinsmKikGR proteinProliferating Cell Nuclear Antigen

Identifiers

PMID22961247
PMCPMC3610324

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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.