Evidence map›Paper›PMID 25970034›Full record

ArticleeLife2015

Cooperative base pair melting by helicase and polymerase positioned one nucleotide from each other.

Divya Nandakumar, Manjula Pandey, Smita S Patel

Open access · goldAbstract read
In one paragraph

Article in eLife, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 31 papers.

0numbers the graph read from it
0cells of the map it votes in
31citing papers in PubMed
1.8field-weighted citation impact, top 15% 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

31 citing papers in PubMed, 43 citations in OpenAlex.

  1. Article
  2. Article
  3. Article
  4. Article
  5. Article
  6. Article
  7. DNA Polymerase Locks Replication Fork Under Stress.bioRxiv : the preprint server for biology · 2024
    Article
  8. Review
  9. Article
  10. Article
  11. Review
  12. Article
  13. Article
  14. Article
  15. Article
  16. Mechanisms of hexameric helicases.Critical reviews in biochemistry and molecular biology · 2021
    Review
  17. Review
  18. Review
  19. Review
  20. 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 at 2 institutions in 1 country.

Divya NandakumarDepartment of Biochemistry and Molecular Biology, Rutgers-Robert Wood Johnson Medical School, Piscataway, United States.
Manjula PandeyDepartment of Biochemistry and Molecular Biology, Rutgers-Robert Wood Johnson Medical School, Piscataway, United States.
Smita S PatelDepartment of Biochemistry and Molecular Biology, Rutgers-Robert Wood Johnson Medical School, Piscataway, United States.
University of California, Davis · USRutgers, The State University of New Jersey · US

Funding

MECHANISTIC STUDIES OF HEXAMERIC HELICASESR01GM055310 · NIGMS · UNIV OF MED/DENT NJ-R W JOHNSON MED SCH · PI PATEL, SMITA S · 1997 to 2015
$4.6M
NIGMS NIH HHS GM55310NIGMS NIH HHS R01 GM055310
6 · The paper itself

Abstract

Leading strand DNA synthesis requires functional coupling between replicative helicase and DNA polymerase (DNAP) enzymes, but the structural and mechanistic basis of coupling is poorly understood. This study defines the precise positions of T7 helicase and T7 DNAP at the replication fork junction with single-base resolution to create a structural model that explains the mutual stimulation of activities. Our 2-aminopurine studies show that helicase and polymerase both participate in DNA melting, but each enzyme melts the junction base pair partially. When combined, the junction base pair is melted cooperatively provided the helicase is located one nucleotide ahead of the primer-end. The synergistic shift in equilibrium of junction base pair melting by combined enzymes explains the cooperativity, wherein helicase stimulates the polymerase by promoting dNTP binding (decreasing dNTP Km), polymerase stimulates the helicase by increasing the unwinding rate-constant (kcat), consequently the combined enzymes unwind DNA with kinetic parameters resembling enzymes translocating on single-stranded DNA.

Indexed as

Models, Biological2-AminopurineDNA-Directed DNA PolymeraseDNA HelicasesDNA PrimaseDNA ReplicationEscherichia coliFluorescenceKineticsNucleic Acid DenaturationOligonucleotides2-AminopurineDNA-Directed DNA PolymeraseDNA HelicasesDNA PrimaseOligonucleotides2-aminopurinebacteriophagebiochemistrybiophysicsDNA polymeraseE. colihelicasepresteady state kineticsreplicationstructural biologyviruses

Identifiers

PMID25970034
PMCPMC4460406
OpenAlexW2158485455

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.