Dna Unfolding
Dna Unfolding - Related Videos
01:37
The Unfolded Protein Response
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2023
The ER is the hub of protein synthesis in a cell. It has robust systems to quality control protein folding and also for degradation of terminally misfolded proteins. Under normal conditions, a small proportion of misfolded proteins that cannot be salvaged need to be transported to the cytoplasm by the ER-associated degradation or ERAD pathways. However, if the ERAD cannot handle the misfolded proteins, the cell activates the unfolded protein response or UPR to adjust the protein folding...
02:38
Assessing Bacterial Chaperone Activity via Thermal Unfolding of a Model Protein
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2025
Source: Dahl, J. et al. Detection of the pH-dependent Activity of Escherichia coli Chaperone HdeB In Vitro and In Vivo. J. Vis. Exp. (2016)This video demonstrates a fluorescence spectrophotometer-based assay to evaluate chaperone activity on a substrate protein under acid and heat stress. It outlines the steps for monitoring substrate unfolding and aggregation through light scattering, comparing conditions with and without the chaperone.
03:25
Recording Neural Activity of Unfolded Hippocampal Tissue Using Penetrating Microelectrode Array
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2025
This video demonstrates the procedure to set up a recording chamber with a penetrating microelectrode array (PMEA) to capture neural signals from an unfolded hippocampus. This method allows us to study the speed and direction of propagation of neural activity within the unfolded hippocampus in vitro.
09:48
Neural Activity Propagation in an Unfolded Hippocampal Preparation with a Penetrating Micro-electrode Array
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Cited by 2 •
2015
We have developed an in vitro unfolded hippocampus which preserves CA1-CA3 array of neurons. Combined with the penetrating micro-electrode array, neural activity can be monitored in both the longitudinal and transverse orientations. This method provides advantages over hippocampal slice preparations as the propagation in the entire hippocampus can be recorded simultaneously.
01:31
Regulation of the Unfolded Protein Response
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2023
Inositol-requiring kinase one or IRE1 is the most conserved eukaryotic unfolded protein response (UPR) receptor. It is a type I transmembrane protein kinase receptor with a distinctive site-specific RNase activity. As the binding mechanics of the misfolded proteins with the N-terminal domain of IRE-1 are unclear, three binding models — direct, indirect, and allosteric -- are proposed for receptor activation. Nevertheless, it is known that once a misfolded protein associates with IRE1, it...
FAQs
These conditions weaken the interactions that maintain the double helix, but they do so as different experimental inputs. Heat, altered pH, and chemical denaturants can each promote strand separation by disrupting hydrogen bonding and base stacking. Comparing these conditions helps researchers evaluate DNA stability and determine which molecular environment makes genetic information more accessible.
Hydrogen bonds connect complementary bases, while base-stacking forces help stabilize the arrangement of neighboring bases within the helix. Disrupting either contribution can reduce the stability of the paired structure, and disrupting both promotes strand separation. This distinction matters because DNA unfolding reflects changes in several stabilizing interactions rather than the loss of hydrogen bonds alone.
Specialized proteins can promote DNA unfolding by disrupting the interactions that keep the double helix together. Unlike heat, pH changes, or chemical denaturants, these proteins provide a biological route to make single-stranded regions available. Their activity is therefore relevant to understanding how cells expose genetic information for biochemical reactions such as replication and transcription.
Temperature, pH, and the presence of chemical denaturants are central conditions because each can influence the interactions stabilizing DNA. Researchers can use these variables to study how molecular environments affect the transition from paired strands to separated strands. The resulting observations support characterization of nucleic acid stability and help identify conditions suitable for downstream biochemical work.
PCR requires access to genetic information in a DNA template, so controlled strand separation is important for making the relevant sequences available during amplification. Studying how heat and other conditions affect unfolding helps researchers characterize nucleic acid stability and optimize amplification conditions. The goal is to promote useful template access while maintaining conditions appropriate for the reaction.
Separated DNA strands provide single-stranded templates that can be used during replication and transcription. Unfolding therefore changes DNA from a paired structure into a form that exposes sequence information for these biochemical reactions. Understanding this accessibility helps connect molecular changes in helix stability with the ability of genetic information to participate in genome-related processes.
After strands separate, single-stranded DNA can pair with a complementary sequence through hybridization. This relationship makes unfolding important when researchers need access to sequences that can recognize and bind matching strands. Studying the process links helix stability with sequence-specific pairing, providing context for how molecular conditions influence whether complementary DNA interactions can occur.