Sliding Clamp
Sliding Clamp - Related Videos
09:43
Patch Clamp Electrophysiology
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2023
Neuron cell membranes are populated with ion channels that control the movement of charge into and out of the cell, thereby regulating neuron firing. One extremely useful technique for investigating the biophysical properties of these channels is called patch clamp recording. In this method, neuroscientists place a polished glass micropipette against a cell and apply suction to form a high resistance seal. This process isolates a small “patch” of membrane that contains one or more ion channels.
01:18
Design Example: Designing Water Slide
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2025
When designing a water slide, controlling the speed of water flow is crucial for rider safety while maintaining an exciting experience. As water flows down the slide, gravity causes it to accelerate, with its speed at the bottom depending on the height from which it starts. The higher the slide, the more potential energy the water has at the top, which is converted into kinetic energy as it descends, increasing its speed. Bernoulli's principle determines the water's velocity along the slide.
06:14
In vitro Biofilm Formation in an 8-well Chamber Slide
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Cited by 62 •
2011
This article describes the procedure for the formation and visualization of a bacterial biofilm grown within an 8-well chamber...
11:01
A Computer-assisted Multi-electrode Patch-clamp System
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Cited by 49 •
2013
Multi-electrode patch-clamp recordings constitute a complex task. Here we show how, by automating of many of the experimental steps, it is possible to accelerate the process leading to qualitative improvement in performance and number of recordings.
10:04
Visualizing Soil Microorganisms via the Contact Slide Assay and Microscopy
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2023
Source: Laboratories of Dr. Ian Pepper and Dr. Charles Gerba - The University of Arizona Demonstrating Author: Bradley Schmitz Soil comprises the thin layer at the earth’s surface, containing biotic and abiotic factors that contribute to life. The abiotic portion includes inorganic particles ranging in size and shape that determine the soil’s texture. The biotic portion incorporates plant residues, roots, organic matter, and microorganisms. Soil microbe abundance and diversity is expansive, as...
FAQs
The clamp loader uses ATP to open the ring and position it at a primer-template junction, where newly initiated synthesis can proceed. This placement is important because it aligns the clamp with the DNA structure required for replication. After loading, the ring can remain associated with double-stranded DNA while supporting the replication machinery.
Once loaded, the clamp moves along double-stranded DNA while tethering DNA polymerase to the template. This tethering reduces loss of the polymerase during synthesis, allowing the enzyme to copy DNA rapidly and continuously. The resulting processivity helps explain how genome duplication remains efficient rather than requiring repeated enzyme recruitment.
Bacterial β clamps and eukaryotic PCNA carry out the central clamping role during genome duplication, but they occur in different biological systems. Both support DNA polymerase attachment, while sliding clamps also recruit proteins involved in DNA repair and chromatin maintenance. This shared function makes them useful systems for comparing replication across organisms.
The primer-template junction provides the specific DNA configuration recognized during loading. The ATP-dependent loader opens the ring and positions it at this junction, placing the clamp where DNA synthesis is beginning. Correct positioning connects the clamp to the active replication site and enables subsequent movement along the double-stranded portion of the template.
A study can focus first on ATP-dependent loading at a primer-template junction, then examine clamp movement along double-stranded DNA and its association with DNA polymerase. Researchers can also assess recruitment of repair or chromatin-maintenance proteins. Together, these stages connect molecular loading behavior with replication performance and broader genome maintenance.
Their ability to keep DNA-processing enzymes associated with the template links clamp function to efficient genome duplication. Because sliding clamps also recruit proteins involved in DNA repair and chromatin maintenance, studying them connects replication with broader systems that preserve genome stability. These relationships make clamp biology relevant to understanding how accurate DNA maintenance is supported.
Sliding clamps provide potential targets because they support DNA-processing pathways required for genome duplication and maintenance. Studies can examine the clamp, its ATP-dependent loading process, or its interactions with DNA polymerase and other recruited proteins. Comparing bacterial β clamps with eukaryotic PCNA also provides context for strategies directed toward microbial or cancer-related DNA processing.