Evidence map›Paper›PMID 40372638›Full record

ArticleMethods in molecular biology (Clifton, N.J.)2025

Expression, Purification, and Measurement of DNA Supercoil Relaxation Activity by Eukaryotic Topoisomerase II.

Clark Fritsch, James M Berger

Abstract read
In one paragraph

Article in Methods in molecular biology (Clifton, N.J.), 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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

0 citing papers in PubMed.

No citing paper in PubMed yet.

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

2 authors.

Clark FritschDepartment of Biophysics and Biophysical Chemistry, Johns Hopkins School of Medicine, Baltimore, MD, USA.
James M BergerDepartment of Biophysics and Biophysical Chemistry, Johns Hopkins School of Medicine, Baltimore, MD, USA. jmberger@jhmi.edu.

Funding

Understanding and exploiting DNA topoisomerases in cancer biologyR35CA263778 · NCI · JOHNS HOPKINS UNIVERSITY · PI James M. Berger · 2021 to 2026
$5.0M
NCI NIH HHS R35 CA263778
6 · The paper itself

Abstract

Topoisomerases play a critical role in safeguarding the genome by resolving topological challenges that both result from and interfere with transcription and replication. These enzymes have been the subject of research not only for understanding their complex mechanisms of action, but also because of their therapeutic utility as drug targets. To gain a better understanding of topoisomerases and how they function, in vitro assays are necessary to measure their activity under various conditions. In this chapter, we describe the expression and purification of a eukaryotic type II topoisomerase (human topo IIα) from budding yeast cells and a gel-based assay that permits measurement of its ability to relax supercoiled DNA.

Indexed as

DNA, SuperhelicalDNA Topoisomerases, Type IIGene ExpressionHumansSaccharomyces cerevisiaeDNA, SuperhelicalDNA Topoisomerases, Type IIAffinity chromatographyDNA relaxationDNA supercoilingEnzyme purificationGel electrophoresisRecombinant protein expressionTopoisomerase II

Identifiers

PMID40372638
PMCPMC13359383

What OpenQuestion holds

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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.