Replication independent formation of extrachromosomal circular DNA in mammalian cell-free system.
Extrachromosomal circular DNA (eccDNA) is a pool of circular double stranded DNA molecules found in all eukaryotic cells and composed of repeated chromosomal sequences. It was proposed to be involved in genomic instability, aging and alternative telomere lengthening. Our study presents novel mammali...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Public Library of Science (PLoS)
2009-07-01
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| Series: | PLoS ONE |
| Online Access: | https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/19568438/?tool=EBI |
| _version_ | 1818836355173580800 |
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| author | Zoya Cohen Sara Lavi |
| author_facet | Zoya Cohen Sara Lavi |
| author_sort | Zoya Cohen |
| collection | DOAJ |
| description | Extrachromosomal circular DNA (eccDNA) is a pool of circular double stranded DNA molecules found in all eukaryotic cells and composed of repeated chromosomal sequences. It was proposed to be involved in genomic instability, aging and alternative telomere lengthening. Our study presents novel mammalian cell-free system for eccDNA generation. Using purified protein extract we show that eccDNA formation does not involve de-novo DNA synthesis suggesting that eccDNA is generated through excision of chromosomal sequences. This process is carried out by sequence-independent enzymes as human protein extract can produce mouse-specific eccDNA from high molecular weight mouse DNA, and vice versa. EccDNA production does not depend on ATP, requires residual amounts of Mg(2+) and is enhanced by double strand DNA breaks. |
| first_indexed | 2024-12-19T03:05:17Z |
| format | Article |
| id | doaj.art-6f4f0ebc7ee44eaf9423cfea177f545c |
| institution | Directory Open Access Journal |
| issn | 1932-6203 |
| language | English |
| last_indexed | 2024-12-19T03:05:17Z |
| publishDate | 2009-07-01 |
| publisher | Public Library of Science (PLoS) |
| record_format | Article |
| series | PLoS ONE |
| spelling | doaj.art-6f4f0ebc7ee44eaf9423cfea177f545c2022-12-21T20:38:07ZengPublic Library of Science (PLoS)PLoS ONE1932-62032009-07-0147e612610.1371/journal.pone.0006126Replication independent formation of extrachromosomal circular DNA in mammalian cell-free system.Zoya CohenSara LaviExtrachromosomal circular DNA (eccDNA) is a pool of circular double stranded DNA molecules found in all eukaryotic cells and composed of repeated chromosomal sequences. It was proposed to be involved in genomic instability, aging and alternative telomere lengthening. Our study presents novel mammalian cell-free system for eccDNA generation. Using purified protein extract we show that eccDNA formation does not involve de-novo DNA synthesis suggesting that eccDNA is generated through excision of chromosomal sequences. This process is carried out by sequence-independent enzymes as human protein extract can produce mouse-specific eccDNA from high molecular weight mouse DNA, and vice versa. EccDNA production does not depend on ATP, requires residual amounts of Mg(2+) and is enhanced by double strand DNA breaks.https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/19568438/?tool=EBI |
| spellingShingle | Zoya Cohen Sara Lavi Replication independent formation of extrachromosomal circular DNA in mammalian cell-free system. PLoS ONE |
| title | Replication independent formation of extrachromosomal circular DNA in mammalian cell-free system. |
| title_full | Replication independent formation of extrachromosomal circular DNA in mammalian cell-free system. |
| title_fullStr | Replication independent formation of extrachromosomal circular DNA in mammalian cell-free system. |
| title_full_unstemmed | Replication independent formation of extrachromosomal circular DNA in mammalian cell-free system. |
| title_short | Replication independent formation of extrachromosomal circular DNA in mammalian cell-free system. |
| title_sort | replication independent formation of extrachromosomal circular dna in mammalian cell free system |
| url | https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/19568438/?tool=EBI |
| work_keys_str_mv | AT zoyacohen replicationindependentformationofextrachromosomalcirculardnainmammaliancellfreesystem AT saralavi replicationindependentformationofextrachromosomalcirculardnainmammaliancellfreesystem |