Open, repair and close again: Chromatin dynamics and the response to UV-induced DNA damage

Palomera-Sánchez, Zoraya; Zurita, Mario

doi:10.1016/j.dnarep.2010.10.010

Cited by 62 publications

(44 citation statements)

References 56 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…InterPro classification of the genes from 231 significantly expanded gene families showed significant enrichment (P < 0.01) of these genes in categories involved in DNA repair and damage response (94 genes) and oxidative phosphorylation processes (107 genes) (Supplementary Table 3). This finding may be related to the increased exposure of snub-nosed monkeys to UV radiation and the potentially increased rate of energy metabolism required for high-altitude survival [14][15][16][17][18] . However, caution is needed in interpreting gene family expansions and contractions that were identified by comparing genomes assembled using different methods.…”

Section: Volume 48 | Number 8 | August 2016 Nature Genetics L E T T Ementioning

confidence: 97%

Genomic analysis of snub-nosed monkeys (Rhinopithecus) identifies genes and processes related to high-altitude adaptation

et al. 2016

View full text Add to dashboard Cite

4 7 OPENThe snub-nosed monkey genus Rhinopithecus includes five closely related species distributed across altitudinal gradients from 800 to 4,500 m. Rhinopithecus bieti, Rhinopithecus roxellana, and Rhinopithecus strykeri inhabit high-altitude habitats, whereas Rhinopithecus brelichi and Rhinopithecus avunculus inhabit lowland regions. We report the de novo whole-genome sequence of R. bieti and genomic sequences for the four other species. Eight shared substitutions were found in six genes related to lung function, DNA repair, and angiogenesis in the high-altitude snub-nosed monkeys. Functional assays showed that the high-altitude variant of CDT1 (Ala537Val) renders cells more resistant to UV irradiation, and the high-altitude variants of RNASE4 (Asn89Lys and Thr128Ile) confer enhanced ability to induce endothelial tube formation in vitro. Genomic scans in the R. bieti and R. roxellana populations identified signatures of selection between and within populations at genes involved in functions relevant to high-altitude adaptation. These results provide valuable insights into the adaptation to high altitude in the snub-nosed monkeys.

show abstract

Section: Volume 48 | Number 8 | August 2016 Nature Genetics L E T T Ementioning

confidence: 97%

Genomic analysis of snub-nosed monkeys (Rhinopithecus) identifies genes and processes related to high-altitude adaptation

et al. 2016

View full text Add to dashboard Cite

show abstract

“…DNA repair is no exception, and dynamic changes in chromatin condensation and accompanying histone marks have been recognized as inevitable DDR pathways [15,[75][76][77][78][79][80]. Here, too, the DDR relies on recruitment of existing players in the chromatin organization arena [32][33][34][75][76][77][78][79][81][82][83][84][85].…”

Section: Rnf20-rnf40 Is Called To Emergency Action Upon Dna Damage Inmentioning

confidence: 99%

RNF20–RNF40: A ubiquitin‐driven link between gene expression and the DNA damage response

et al. 2011

View full text Add to dashboard Cite

a b s t r a c tThe DNA damage response (DDR) is emerging as a vast signaling network that temporarily modulates numerous aspects of cellular metabolism in the face of DNA lesions, especially critical ones such as the double strand break (DSB). The DDR involves extensive dynamics of protein post-translational modifications, most notably phosphorylation and ubiquitylation. The DSB response is mobilized primarily by the ATM protein kinase, which phosphorylates a plethora of key players in its various branches. It is based on a core of proteins dedicated to the damage response, and a cadre of proteins borrowed temporarily from other cellular processes to help meet the challenge. A recently identified novel component of the DDR pathway -histone H2B monoubiquitylationexemplifies this principle. In mammalian cells, H2B monoubiquitylation is driven primarily by an E3 ubiquitin ligase composed of the two RING finger proteins RNF20 and RNF40. Generation of monoubiquitylated histone H2B (H2Bub) has been known to be coupled to gene transcription, presumably modulating chromatin decondensation at transcribed regions. New evidence indicates that the regulatory function of H2Bub on gene expression can selectively enhance or suppress the expression of distinct subsets of genes through a mechanism involving the hPAF1 complex and the TFIIS protein. This delicate regulatory process specifically affects genes that control cell growth and genome stability, and places RNF20 and RNF40 in the realm of tumor suppressor proteins. In parallel, it was found that following DSB induction, the H2B monoubiquitylation module is recruited to damage sites where it induces local H2Bub, which in turn is required for timely recruitment of DSB repair protein and, subsequently, timely DSB repair. This pathway represents a crossroads of the DDR and chromatin organization, and is a typical example of how the DDR calls to action functional modules that in unprovoked cells regulate other processes. Ó 2011 Federation of European Biochemical Societies. Published by Elsevier B.V. The DNA damage response: borrowing functional modules in an emergencyCellular metabolism is controlled by numerous, interlocked signaling networks. These networks are constantly responding to internal and external stimuli related to the cell's normal life cycle and functions, and to threats to its well being. A major threat to cellular homeostasis is subversion of its genomic stability, which may lead to undue cell death or to neoplasia [1,2]. DNA damage caused by internal or external damaging agents is a major danger to the integrity of the cellular genome. The cellular defense system against this threat is the DNA damage response (DDR) -an elaborate signaling network activated by DNA damage, which swiftly modulates many physiological processes [3,4]. A strong trigger of the DDR is the DNA double-strand break (DSB) [5,6]. DSBs are induced by ionizing radiation, radiomimetic chemicals, reactive oxygen species formed in the course of normal metabolism, and can also result from replic...

show abstract

“…One of the NER key players is transcription factor II H (TFIIH). After damage recognition, the DNA helix is opened by the TFIIH bidirectional helicase function, to allow incision of the damaged strand, gap filling and ligation (Palomera-Sanchez and Zurita, 2011). Besides NER, TFIIH is also essential for RNA polymerase I and II transcription and cell cycle regulation (Egly and Coin, 2011).…”

Section: Introductionmentioning

confidence: 99%

In vivo interactions of TTDA mutant proteins within TFIIH

Nonnekens

Cabantous

Slingerland

et al. 2013

Journal of Cell Science

View full text Add to dashboard Cite

SummaryTrichothiodystrophy group A (TTD-A) patients carry a mutation in the transcription factor II H (TFIIH) subunit TTDA. Using a novel in vivo tripartite split-GFP system, we show that TTDA interacts with the TFIIH subunit p52 and the p52-TTDA-GFP product is incorporated into TFIIH. p52-TTDA-GFP is able to bind DNA and is recruited to UV-damaged DNA. Furthermore, we show that two patient-mutated TTDA proteins can interact with p52, are able to bind to the DNA and can localize to damaged DNA. Our findings give new insights into the behavior of TTDA within the context of a living cell and thereby shed light on the complex phenotype of TTD-A patients.

show abstract

Open, repair and close again: Chromatin dynamics and the response to UV-induced DNA damage

Cited by 62 publications

References 56 publications

Genomic analysis of snub-nosed monkeys (Rhinopithecus) identifies genes and processes related to high-altitude adaptation

Genomic analysis of snub-nosed monkeys (Rhinopithecus) identifies genes and processes related to high-altitude adaptation

RNF20–RNF40: A ubiquitin‐driven link between gene expression and the DNA damage response

In vivo interactions of TTDA mutant proteins within TFIIH

Contact Info

Product

Resources

About