6533b836fe1ef96bd12a1641
RESEARCH PRODUCT
Replication origins and pause sites in sea urchin mitochondrial DNA
Andrew G. MayhookHoward T. JacobsA.m. Rinaldisubject
DNA ReplicationMitochondrial DNAMacromolecular SubstancesRestriction MappingEukaryotic DNA replicationBiologyOrigin of replicationPre-replication complexDNA MitochondrialDNA RibosomalGeneral Biochemistry Genetics and Molecular BiologyElectron Transport Complex IVRNA TransferControl of chromosome duplicationAnimalsElectrophoresis Gel Two-DimensionalGeneral Environmental ScienceElectrophoresis Agar GelGeneral Immunology and MicrobiologyTer proteinChromosome MappingNADH DehydrogenaseGeneral MedicineMolecular biologyCell biologyRNA RibosomalSea UrchinsNucleic Acid ConformationOrigin recognition complexSolution hybridizationGeneral Agricultural and Biological Sciencesdescription
We have used a combination of one- and two-dimensional agarose gel electrophoresis, and solution hybridization to strand-specific probes, to map the replication origin of sea urchin mitochondrial DNA and to investigate the structure of replication intermediates. These assays are consistent with replication initiating unidirectionally from the D-loop region by D-loop expansion, as in vertebrates. A prominent site of initiation of lagging-strand synthesis lies at, or near to, the boundary between the genes for ATPase 6 and COIII, which is also close to a pause site for leading-strand synthesis. These findings suggest a role for pause sites in the regulation of mitochondrial transcription and replication, possibly involving template-binding proteins.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1992-04-22 | Proceedings of the Royal Society of London. Series B: Biological Sciences |