ArticleNucleic acids research2005
Initiation of DNA replication at the human beta-globin 3' enhancer.
Article in Nucleic acids research, 2005. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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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.
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Who cites it
5 citing papers in PubMed, 9 citations in OpenAlex.
- Peaks cloaked in the mist: the landscape of mammalian replication origins.The Journal of cell biology · 2015Review
- A multiprotein complex necessary for both transcription and DNA replication at the β-globin locus.The EMBO journal · 2010Article
- Human RECQ1 and RECQ4 helicases play distinct roles in DNA replication initiation.Molecular and cellular biology · 2010Article
- Global organization of replication time zones of the mouse genome.Genome research · 2008Article
- Beta-globin LCR and intron elements cooperate and direct spatial reorganization for gene therapy.PLoS genetics · 2008Article
Corrections and comments
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Authors and funding
5 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The origin of DNA replication in the human beta-globin gene contains an initiation region (IR) and two flanking auxiliary elements. Two replicator modules are located within the upstream auxiliary sequence and the IR core, but the functional sequences in the downstream auxiliary element are unknown. Here, we use a combination of benzoylated-naphthoylated DEAE (BND) cellulose purification and nascent strand abundance assays to show that replication initiation occurs at the beta-globin 3' enhancer on human chromosome 11 in the Hu11 hybrid murine erythroleukemia (MEL) cell line. To examine replicator function, 3' enhancer fragments were inserted into an ectopic site in MEL cells via an optimized FRT/EGFP-FLP integration system. These experiments demonstrate that the 1.6 kb downstream auxiliary element is a third replicator module called bGRep-E in erythroid cells. The minimal 260 bp 3' enhancer is required but not sufficient to initiate efficient replication, suggesting cooperation with adjacent sequences. The minimal 3' enhancer also cooperates with elements in an expressing HS3beta/gamma-globin construct to initiate replication. These data indicate that the beta-globin replicator has multiple initiation sites in three closely spaced replicator modules. We conclude that a mammalian enhancer can cooperate with adjacent sequences to create an efficient replicator module.
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