Evidence map›Paper›PMID 19092133›Full record

ArticleGenome research2009

Relics of repeat-induced point mutation direct heterochromatin formation in Neurospora crassa.

Zachary A Lewis, Shinji Honda, Tamir K Khlafallah, Jennifer K Jeffress, Michael Freitag, Fabio Mohn, Dirk Schübeler, Eric U Selker

Open access · bronzeAbstract read
In one paragraph

Article in Genome research, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 111 papers.

0numbers the graph read from it
0cells of the map it votes in
111citing 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

111 citing papers in PubMed, 195 citations in OpenAlex.

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  12. The Impact of DNA Methylation inMicroorganisms · 2025
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  20. Histone deacetylation and cytosine methylation compartmentalize heterochromatic regions in the genome organization ofProceedings of the National Academy of Sciences of the United States of America · 2023
    Article

51 more citing papers are in PubMed but not listed here.

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.

Zachary A LewisInstitute of Molecular Biology, University of Oregon, Eugene, Oregon, 97403-1229, USA.
Shinji Honda
Tamir K Khlafallah
Jennifer K Jeffress
Michael Freitag
Fabio Mohn
Dirk Schübeler
Eric U Selker
University of Oregon · USFriedrich Miescher Institute · CHOregon State University · US

Funding

NIGMS NIH HHS GM025690-22
6 · The paper itself

Abstract

Both RNAi-dependent and -independent mechanisms have been implicated in the establishment of heterochromatin domains, which may be stabilized by feedback loops involving chromatin proteins and modifications of histones and DNA. Neurospora crassa sports features of heterochromatin found in higher eukaryotes, namely cytosine methylation (5mC), methylation of histone H3 lysine 9 (H3K9me), and heterochromatin protein 1 (HP1), and is a model to investigate heterochromatin establishment and maintenance. We mapped the distribution of HP1, 5mC, H3K9me3, and H3K4me2 at 100 bp resolution and explored their interplay. HP1, H3K9me3, and 5mC were extensively co-localized and defined 44 heterochromatic domains on linkage group VII, all relics of repeat-induced point mutation. Interestingly, the centromere was found in an approximately 350 kb heterochromatic domain with no detectable H3K4me2. 5mC was not found in genes, in contrast to the situation in plants and animals. H3K9me3 is required for HP1 localization and DNA methylation in N. crassa. In contrast, we found that localization of H3K9me3 was independent of 5mC or HP1 at virtually all heterochromatin regions. In addition, we observed complete restoration of DNA methylation patterns after depletion and reintroduction of the H3K9 methylation machinery. These data show that A:T-rich RIP'd DNA efficiently directs methylation of H3K9, which in turn, directs methylation of associated cytosines.

Indexed as

Point MutationChromosome MappingChromosomes, FungalDNA MethylationEukaryotic Initiation FactorsEvolution, MolecularHeterochromatinHistone-Lysine N-MethyltransferaseHistone MethyltransferasesHistonesMutagenesisNeurospora crassaOrganisms, Genetically ModifiedRepetitive Sequences, Nucleic AcidEukaryotic Initiation FactorsHeterochromatinHistone-Lysine N-MethyltransferaseHistone MethyltransferasesHistones

Identifiers

PMID19092133
PMCPMC2661801
OpenAlexW2128829232

What OpenQuestion holds

Textmetadata
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.