Vector Genome Junctions
Vector Genome Junctions - Related Videos
04:35
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Source: Ehrke-Schulz, E., et al. Cloning and Large-Scale Production of High-Capacity Adenoviral Vectors Based on the Human Adenovirus Type 5. J. Vis. Exp. (2016)This video demonstrates the purification of high-capacity adenoviral vectors using cesium chloride gradient ultracentrifugation, enabling the separation of genome-containing virions for applications in gene delivery, vector characterization, and preclinical therapeutic...
08:31
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A well-established technique for modifying specific sequences in the genome is gene targeting by homologous recombination, but this method can be laborious and only works in certain organisms. Recent advances have led to the development of “genome editing”, which works by inducing double-strand breaks in DNA using engineered nuclease enzymes guided to target genomic sites by either proteins or RNAs that recognize specific sequences. When a cell attempts to repair this damage, mutations can be...
02:02
Genomics
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Genomics is the science of genomes: it is the study of all the genetic material of an organism. In humans, the genome consists of information carried in 23 pairs of chromosomes in the nucleus, as well as mitochondrial DNA. In genomics, both coding and non-coding DNA is sequenced and analyzed. Genomics allows a better understanding of all living things, their evolution, and their diversity. It has a myriad of uses: for example, to build phylogenetic trees, to improve productivity and...
10:42
A Protocol for the Production of Integrase-deficient Lentiviral Vectors for CRISPR/Cas9-mediated Gene Knockout in Dividing Cells
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Cited by 21 •
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We describe the production strategy of integrase-deficient lentiviral vectors (IDLVs) as vehicles for delivering CRISPR/Cas9 to cells. With an ability to mediate quick and robust gene editing in cells, IDLVs present a safer and equally effective vector platform for gene delivery compared to integrase-competent vectors.
FAQs
Different stages can produce these boundaries. During construction, engineered genetic elements are assembled within a vector genome; during replication or recombination, DNA arrangements may change; and during concatemer formation, separate vector genomes can join. Because each process can leave a distinct sequence arrangement, junction analysis helps connect an observed genome structure with its likely origin.
Their sequences provide checkpoints for whether the intended genetic elements are joined correctly and whether the vector retains an appropriate overall structure. Analysis can also expose rearrangements or unintended vector-backbone carryover. These findings matter because a preparation may contain structural features that are not apparent from examining the planned design alone.
A junction linking one vector genome to another supports the presence of concatemer formation, whereas a boundary within an engineered construct can reflect its assembly or a rearrangement. Determining the sequence across the boundary provides direct evidence of how neighboring regions are connected. This makes junction mapping useful for examining vector genome organization and structural changes.
The workflow first amplifies DNA that crosses a selected boundary, rather than examining only one adjoining region. Sequencing the amplified material then identifies the actual order and connection of the neighboring sequences. Researchers can compare that result with the intended vector design to confirm assembly, identify altered arrangements, and characterize the structure present in a vector preparation.
Researchers examine whether sequences bordering the engineered cargo correspond to the intended vector design or include backbone material that should not be present. Amplifying across the relevant junction and determining its sequence can reveal that carryover directly. This application supports structural quality assessment by showing which DNA regions are actually connected in the analyzed preparation.
It is particularly useful after vector construction and before a vector preparation is used in downstream research. The analysis verifies correct assembly and checks for rearrangements or unintended backbone sequences before those materials enter experiments. It can therefore function as a structural characterization step alongside broader investigations of vector genome composition and integrity.
Mapping these boundaries helps researchers track vector genome structure in studies of how delivered genetic material persists. When integration is applicable, junction information can also contribute to examining how vector genomes relate to integration events and their genetic consequences. The analysis therefore connects molecular structure with questions about the fate of vector DNA after delivery to cells.