Evidence map›Paper›PMID 22787202›Full record

ArticleJournal of virology2012

Characterization of nucleosome positioning in hepadnaviral covalently closed circular DNA minichromosomes.

Liping Shi, Shaohua Li, Fang Shen, Haodong Li, Shuiming Qian, Daniel H S Lee, Jim Z Wu, Wengang Yang

Open access · bronzeAbstract read
In one paragraph

Article in Journal of virology, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 21 papers.

0numbers the graph read from it
0cells of the map it votes in
21citing papers in PubMed
1.4field-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

21 citing papers in PubMed, 34 citations in OpenAlex.

  1. Article
  2. Article
  3. A nucleosome switch primes Hepatitis B Virus infection.bioRxiv : the preprint server for biology · 2024
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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

8 authors at 3 institutions in 2 countries.

Liping ShiRoche Pharma Research and Early Development China, Shanghai, China.
Shaohua Li
Fang Shen
Haodong Li
Shuiming Qian
Daniel H S Lee
Jim Z Wu
Wengang Yang
Roche (Switzerland) · CHRoche (China) · CNWuXi AppTec (China) · CN

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Hepadnaviral covalently closed circular DNA (cccDNA) exists as an episomal minichromosome in the nucleus of virus-infected hepatocytes, and serves as the transcriptional template for the synthesis of viral mRNAs. To obtain insight on the structure of hepadnaviral cccDNA minichromosomes, we utilized ducks infected with the duck hepatitis B virus (DHBV) as a model and determined the in vivo nucleosome distribution pattern on viral cccDNA by the micrococcal nuclease (MNase) mapping and genome-wide PCR amplification of isolated mononucleosomal DHBV DNA. Several nucleosome-protected sites in a region of the DHBV genome [nucleotides (nt) 2000 to 2700], known to harbor various cis transcription regulatory elements, were consistently identified in all DHBV-positive liver samples. In addition, we observed other nucleosome protection sites in DHBV minichromosomes that may vary among individual ducks, but the pattern of MNase mapping in those regions is transmittable from the adult ducks to the newly infected ducklings. These results imply that the nucleosomes along viral cccDNA in the minichromosomes are not random but sequence-specifically positioned. Furthermore, we showed in ducklings that a significant portion of cccDNA possesses a few negative superhelical turns, suggesting the presence of intermediates of viral minichromosomes assembled in the liver, where dynamic hepatocyte growth and cccDNA formation occur. This study supplies the initial framework for the understanding of the overall complete structure of hepadnaviral cccDNA minichromosomes.

Indexed as

AnimalsBase SequenceBinding SitesChromosome MappingDNA, CircularDNA, ViralDucksGenome, ViralHepadnaviridae InfectionsHepatitis B Virus, DuckHepatitis, Viral, AnimalLiverMicrococcal NucleaseNucleosomesPlasmidsRNA, ViralDNA, CircularDNA, ViralMicrococcal NucleaseNucleosomesRNA, ViralViral Core Proteins

Identifiers

PMID22787202
PMCPMC3446612
OpenAlexW1988086662

What OpenQuestion holds

Textmetadata
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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.