Evidence map›Paper›PMID 19875981›Full record

ArticleThe EMBO journal2010

Inactivation of the Sas2 histone acetyltransferase delays senescence driven by telomere dysfunction.

Marina L Kozak, Alejandro Chavez, Weiwei Dang, Shelley L Berger, Annie Ashok, Xiaoge Guo, F Brad Johnson

Open access · bronzeAbstract read
In one paragraph

Article in The EMBO journal, 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 36 papers.

0numbers the graph read from it
0cells of the map it votes in
36citing papers in PubMed
1.5field-weighted citation impact, top 18% 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

36 citing papers in PubMed, 54 citations in OpenAlex.

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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

7 authors at 2 institutions in 1 country.

Marina L KozakDepartment of Pathology and Laboratory Medicine, University of Pennsylvania School of Medicine, Philadelphia, PA 19104-6100, USA.
Alejandro Chavez
Weiwei Dang
Shelley L Berger
Annie Ashok
Xiaoge Guo
F Brad Johnson
University of Pennsylvania · USThe Wistar Institute · US

Funding

STRUCTURAL BASIS FOR EPIGENETICS IN AGING AND LONGEVITYP01AG031862 · NIA · WISTAR INSTITUTE · PI GARCIA, BENJAMIN A · 2008 to 2022
$28.3M
Training in Alzheimer’s and Age-Related Neurodegenerative DiseasesT32AG000255 · NIA · UNIVERSITY OF PENNSYLVANIA · PI ALICE S CHEN-PLOTKIN, VIRGINIA M LEE · 1997 to 2026
$12.5M
Telomere maintenance by Werner syndrome family proteins.R01AG021521 · NIA · UNIVERSITY OF PENNSYLVANIA · PI JOHNSON, F. BRAD · 2004 to 2013
$2.8M
NIA NIH HHS P01 AG031862NIA NIH HHS P01-AG031862NIA NIH HHS R01 AG021521NIA NIH HHS R01-AG021521NIA NIH HHS T32 AG000255NIA NIH HHS T32-AG000255
6 · The paper itself

Abstract

Changes in telomere chromatin have been linked to cellular senescence, but the underlying mechanisms and impact on lifespan are unclear. We found that inactivation of the Sas2 histone acetyltransferase delays senescence in Saccharomyces cerevisiae telomerase (tlc1) mutants through a homologous recombination-dependent mechanism. Sas2 acetylates histone H4 lysine 16 (H4K16), and telomere shortening in tlc1 mutants was accompanied by a selective and Sas2-dependent increase in subtelomeric H4K16 acetylation. Further, mutation of H4 lysine 16 to arginine, which mimics constitutively deacetylated H4K16, delayed senescence and was epistatic to sas2 deletion, indicating that deacetylated H4K16 mediates the delay caused by sas2 deletion. Sas2 normally prevents the Sir2/3/4 heterochromatin complex from leaving the telomere and spreading to internal euchromatic loci. Senescence was delayed by sir3 deletion, but not sir2 deletion, indicating that senescence delay is mediated by release of Sir3 specifically from the telomere repeats. In contrast, sir4 deletion sped senescence and blocked the delay conferred by sas2 or sir3 deletion. We thus show that manipulation of telomere chromatin modulates senescence caused by telomere shortening.

Indexed as

AcetylationEpistasis, GeneticGene DeletionGenes, FungalHistone AcetyltransferasesHistonesModels, BiologicalMultiprotein ComplexesMutationRecombination, GeneticSaccharomyces cerevisiaeSaccharomyces cerevisiae ProteinsSilent Information Regulator Proteins, Saccharomyces cerevisiaeSirtuin 2TelomeraseTelomereHistone AcetyltransferasesHistonesMultiprotein ComplexesSaccharomyces cerevisiae ProteinsSas2 protein, S cerevisiaeSilent Information Regulator Proteins, Saccharomyces cerevisiaeSIR2 protein, S cerevisiaeSIR3 protein, S cerevisiaeSIR4 protein, S cerevisiaeSirtuin 2Telomerase

Identifiers

PMID19875981
PMCPMC2808364
OpenAlexW2099455120

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.