Related Experiment Video
Updated: Aug 1, 2026

Amplification, Next-generation Sequencing, and Genomic DNA Mapping of Retroviral Integration Sites
Published on: March 22, 2016
Mapping of replication initiation sites in the mouse ribosomal gene cluster
1Institut für Biochemie, Universität Würzburg, Biozentrum, D-97074 Würzburg, Germany.
Abstract:
We have used nascent strand determination analysis to map start sites of DNA replication in the mouse ribosomal gene cluster in which individual copies of the ribosomal genes are separated by intergenic spacer regions. One origin of bidirectional replication (OBR) was localized within a 3 kb region centered about 1.6 kb upstream of the rDNA transcription start site. At least one additional initiation site is situated near the 3' end of the transcription unit. Adjacent to the OBR at the transcription start site are located two amplification-promoting sequences, i.e., APS1 and APS2. Nuclease-hypersensitive sites were identified in both of the two APSs as well as in the OBR region, thus indicating that these sequences have an altered chromatin structure. In the OBR an intrinsically bent region, a purine-rich element and other prospective initiation zone components are found.
More Related Videos
Related Concept Videos
Chromosome Replication
Initiation of Translation
First, the initiator tRNA must be selected from the pool of elongator tRNAs by eukaryotic initiation factor 2 (eIF2). The initiator tRNA (Met-tRNAi) has conserved sequence elements including modified bases at...
Leaky Scanning
Ribosome Profiling
Applications of ribosome profiling
Ribosome profiling has many applications, including in vivo monitoring of translation inside a particular organ or tissue type and quantifying new protein synthesis levels.
The technique helps...
Replication in Prokaryotes
Many Proteins Work Together to Replicate the Chromosome
Replication is coordinated and carried out by a host of specialized...
Replication in Eukaryotes
Many Proteins Orchestrate Replication at the Origin
Eukaryotic replication follows many of the same...

