Synthetic Dna Duplex
Synthetic Dna Duplex - Related Videos
11:42
Iterative Optimization of DNA Duplexes for Crystallization of SeqA-DNA Complexes
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2012
Crystal structure of protein–DNA complexes can provide insight into protein function, mechanism, as well as, the nature of the specific interaction. Here, we report how to optimize the length, sequence and ends of duplex DNA for co-crystallization with Escherichia coli SeqA, a negative regulator of replication initiation.
07:28
Synthetic Biology
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2023
This video presents synthetic biology and its role in bioengineering. Synthetic biology refers to the methods used to genetically modify organisms in order to make them capable of producing large quantities of a product. This product could be a protein that the cell already makes or a new protein that has been encoded in a newly-inserted DNA sequence. Here, we discuss how an organism's genetic material is modified using transformation or transfection. Then, the process is shown in the...
08:45
Duplex Digital PCR for Simultaneous Quantification of Dual Genetic Markers
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2025
In this video, we demonstrate the duplex digital PCR (ddPCR) technique — a modification of the traditional PCR technique that is useful in detecting two different genetic markers simultaneously. A single PCR reaction is partitioned into nanoliter-sized emulsified droplets that are independently amplified, and the detection of differently colored fluorescence amplification signals from the fraction of droplets is used to compute the initial concentration of the target sequences.
21:55
Engineering and Evolution of Synthetic Adeno-Associated Virus (AAV) Gene Therapy Vectors via DNA Family Shuffling
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Cited by 35 •
2012
We demonstrate the basic technique to molecularly engineer and evolve synthetic Adeno-associated viral (AAV) gene therapy vectors via DNA family shuffling. Moreover, we provide general guidelines and representative examples for selection and analysis of individual chimeric capsids with enhanced properties on target cells in culture or in mice.
08:02
Synthetic Condensates and Cell-Like Architectures from Amphiphilic DNA Nanostructures
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2024
We present a protocol for preparing synthetic biomolecular condensates consisting of amphiphilic DNA nanostars starting from their constituent DNA oligonucleotides. Condensates are produced from either a single nanostar component or two components and are modified to sustain in vitro transcription of RNA from an embedded DNA template.
FAQs
Duplex stability reflects two cooperating features: hydrogen bonds pair complementary bases, while base stacking reinforces the helical structure. The strands must align in opposite, antiparallel orientations so corresponding bases can pair correctly. Because these contributions arise from the molecular arrangement itself, altering the sequence can change structural stability and the way other molecules recognize the duplex.
Sequence controls more than which bases appear in a construct. It determines the available complementary pairing pattern and contributes to the stacking arrangement along the helix. Consequently, two Synthetic DNA duplexes with different sequences can present distinct stability and recognition properties, making sequence comparison useful for separating sequence effects from other variables in biochemical experiments.
Compared with an unspecified DNA sample, a designed duplex provides a known sequence and a controlled molecular structure. That control lets investigators ask whether an observed binding or enzyme-recognition result follows from the tested sequence rather than from unknown sequence variation. In this way, the duplex functions as a defined biochemical substrate for relating molecular interactions to biological function.
Design begins by selecting the nucleotide sequence that addresses the experimental question and specifying its complementary strand. The two single-stranded components are then brought together so complementary bases can align antiparallel and form the duplex. Once prepared, the defined molecule can be introduced into a hybridization, binding, or enzyme-recognition experiment as a controlled substrate.
Choice of sequence depends on the interaction being examined. A duplex intended for hybridization tests can reveal sequence-dependent pairing, whereas one used with a protein or nucleic-acid probe can test molecular recognition. Enzyme-focused designs provide a defined substrate for examining recognition. Keeping the sequence specified helps connect an experimental outcome to the tested molecular features.
In biochemistry, these molecules support assay development and molecular diagnostics because their sequences and structures are controlled. They also help investigators compare binding, hybridization, and enzyme-recognition behavior under defined molecular conditions. In synthetic genetic systems, the same control is valuable for studying how designed DNA interactions contribute to biological function rather than relying on an unspecified substrate.