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Diastereomeric Recognition of 5',8-cyclo-2'-Deoxyadenosine Lesions by Human Poly(ADP-ribose) Polymerase 1 in a Biomimetic Model.

Identifieur interne : 000602 ( PubMed/Checkpoint ); précédent : 000601; suivant : 000603

Diastereomeric Recognition of 5',8-cyclo-2'-Deoxyadenosine Lesions by Human Poly(ADP-ribose) Polymerase 1 in a Biomimetic Model.

Auteurs : Annalisa Masi [Italie] ; Arianna Sabbia [Italie] ; Carla Ferreri [Italie] ; Francesco Manoli [Italie] ; Yanhao Lai [États-Unis] ; Eduardo Laverde [États-Unis] ; Yuan Liu [États-Unis] ; Marios G. Krokidis [Grèce] ; Chryssostomos Chatgilialoglu [Italie] ; Maria Rosaria Faraone Mennella [Italie]

Source :

RBID : pubmed:30717407

Descripteurs français

English descriptors

Abstract

5',8-Cyclo-2'-deoxyadenosine (cdA), in the 5'R and 5'Sdiastereomeric forms, are typical non strand-break oxidative DNA lesions, induced by hydroxyl radicals, with emerging importance as a molecular marker. These lesions are exclusively repaired by the nucleotide excision repair (NER) mechanism with a low efficiency, thus readily accumulating in the genome. Poly(ADP-ribose) polymerase1 (PARP1) acts as an early responder to DNA damage and plays a key role as a nick sensor in the maintenance of the integrity of the genome by recognizing nicked DNA. So far, it was unknown whether the two diastereomeric cdA lesions could induce specific PARP1 binding. Here, we provide the first evidence of PARP1 to selectively recognize the diastereomeric lesions of 5'S-cdA and 5'R-cdA in vitro as compared to deoxyadenosine in model DNA substrates (23-mers) by using circular dichroism, fluorescence spectroscopy, immunoblotting analysis, and gel mobility shift assay. Several features of the recognition of the damaged and undamaged oligonucleotides by PARP1 were characterized. Remarkably, PARP1 exhibits different affinities in binding to a double strand (ds) oligonucleotide, which incorporates cdA lesions in R and S diastereomeric form. In particular, PARP1 proved to bind oligonucleotides, including a 5'S-cdA, with a higher affinity constant for the 5'S lesion in a model of ds DNA than 5'R-cdA, showing different recognition patterns, also compared with undamaged dA. This new finding highlights the ability of PARP1 to recognize and differentiate the distorted DNA backbone in a biomimetic system caused by different diastereomeric forms of a cdA lesion.

DOI: 10.3390/cells8020116
PubMed: 30717407


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pubmed:30717407

Le document en format XML

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<term>Deoxyadenosines (chemistry)</term>
<term>Fluorescence</term>
<term>Humans</term>
<term>Models, Biological</term>
<term>Molecular Weight</term>
<term>Oligonucleotides (metabolism)</term>
<term>Poly (ADP-Ribose) Polymerase-1 (metabolism)</term>
<term>Protein Binding</term>
<term>Stereoisomerism</term>
<term>Substrate Specificity</term>
<term>Temperature</term>
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<term>Altération de l'ADN</term>
<term>Biomimétique</term>
<term>Désoxyadénosine ()</term>
<term>Fluorescence</term>
<term>Humains</term>
<term>Liaison aux protéines</term>
<term>Masse moléculaire</term>
<term>Modèles biologiques</term>
<term>Oligonucléotides (métabolisme)</term>
<term>Poly (ADP-Ribose) polymerase-1 (métabolisme)</term>
<term>Spécificité du substrat</term>
<term>Stéréoisomérie</term>
<term>Température</term>
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<term>Oligonucleotides</term>
<term>Poly (ADP-Ribose) Polymerase-1</term>
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<term>Biomimetics</term>
<term>DNA Damage</term>
<term>Fluorescence</term>
<term>Humans</term>
<term>Models, Biological</term>
<term>Molecular Weight</term>
<term>Protein Binding</term>
<term>Stereoisomerism</term>
<term>Substrate Specificity</term>
<term>Temperature</term>
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<term>Désoxyadénosine</term>
<term>Fluorescence</term>
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<term>Liaison aux protéines</term>
<term>Masse moléculaire</term>
<term>Modèles biologiques</term>
<term>Spécificité du substrat</term>
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<front>
<div type="abstract" xml:lang="en">5',8-Cyclo-2'-deoxyadenosine (cdA), in the 5'
<i>R</i>
and 5'
<i>S</i>
diastereomeric forms, are typical non strand-break oxidative DNA lesions, induced by hydroxyl radicals, with emerging importance as a molecular marker. These lesions are exclusively repaired by the nucleotide excision repair (NER) mechanism with a low efficiency, thus readily accumulating in the genome. Poly(ADP-ribose) polymerase1 (PARP1) acts as an early responder to DNA damage and plays a key role as a nick sensor in the maintenance of the integrity of the genome by recognizing nicked DNA. So far, it was unknown whether the two diastereomeric cdA lesions could induce specific PARP1 binding. Here, we provide the first evidence of PARP1 to selectively recognize the diastereomeric lesions of 5'
<i>S</i>
-cdA and 5'
<i>R</i>
-cdA in vitro as compared to deoxyadenosine in model DNA substrates (23-mers) by using circular dichroism, fluorescence spectroscopy, immunoblotting analysis, and gel mobility shift assay. Several features of the recognition of the damaged and undamaged oligonucleotides by PARP1 were characterized. Remarkably, PARP1 exhibits different affinities in binding to a double strand (ds) oligonucleotide, which incorporates cdA lesions in
<i>R</i>
and
<i>S</i>
diastereomeric form. In particular, PARP1 proved to bind oligonucleotides, including a 5'
<i>S</i>
-cdA, with a higher affinity constant for the 5'
<i>S</i>
lesion in a model of ds DNA than 5'
<i>R</i>
-cdA, showing different recognition patterns, also compared with undamaged dA. This new finding highlights the ability of PARP1 to recognize and differentiate the distorted DNA backbone in a biomimetic system caused by different diastereomeric forms of a cdA lesion.</div>
</front>
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<Day>03</Day>
</DateCompleted>
<DateRevised>
<Year>2020</Year>
<Month>03</Month>
<Day>09</Day>
</DateRevised>
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<Journal>
<ISSN IssnType="Print">2073-4409</ISSN>
<JournalIssue CitedMedium="Print">
<Volume>8</Volume>
<Issue>2</Issue>
<PubDate>
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<Month>02</Month>
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<Title>Cells</Title>
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<Abstract>
<AbstractText>5',8-Cyclo-2'-deoxyadenosine (cdA), in the 5'
<i>R</i>
and 5'
<i>S</i>
diastereomeric forms, are typical non strand-break oxidative DNA lesions, induced by hydroxyl radicals, with emerging importance as a molecular marker. These lesions are exclusively repaired by the nucleotide excision repair (NER) mechanism with a low efficiency, thus readily accumulating in the genome. Poly(ADP-ribose) polymerase1 (PARP1) acts as an early responder to DNA damage and plays a key role as a nick sensor in the maintenance of the integrity of the genome by recognizing nicked DNA. So far, it was unknown whether the two diastereomeric cdA lesions could induce specific PARP1 binding. Here, we provide the first evidence of PARP1 to selectively recognize the diastereomeric lesions of 5'
<i>S</i>
-cdA and 5'
<i>R</i>
-cdA in vitro as compared to deoxyadenosine in model DNA substrates (23-mers) by using circular dichroism, fluorescence spectroscopy, immunoblotting analysis, and gel mobility shift assay. Several features of the recognition of the damaged and undamaged oligonucleotides by PARP1 were characterized. Remarkably, PARP1 exhibits different affinities in binding to a double strand (ds) oligonucleotide, which incorporates cdA lesions in
<i>R</i>
and
<i>S</i>
diastereomeric form. In particular, PARP1 proved to bind oligonucleotides, including a 5'
<i>S</i>
-cdA, with a higher affinity constant for the 5'
<i>S</i>
lesion in a model of ds DNA than 5'
<i>R</i>
-cdA, showing different recognition patterns, also compared with undamaged dA. This new finding highlights the ability of PARP1 to recognize and differentiate the distorted DNA backbone in a biomimetic system caused by different diastereomeric forms of a cdA lesion.</AbstractText>
</Abstract>
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</AffiliationInfo>
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