Nucleation Promoting Factors
Nucleation Promoting Factors - Related Videos
02:40
The Eukaryotic Promoter Region
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2020
The eukaryotic promoter region is a segment of DNA located upstream of a gene. It contains an RNA polymerase binding site, a transcription start site, and several cis-regulatory sequences. The proximal promoter region is located in the vicinity of the gene and has cis-regulatory sequences and the core promoter. The core promoter is the binding site for RNA polymerase and is usually located between -35 and +35 nucleotides from the transcription start site. The distal promoter regions are...
09:41
Visualization of Cell Cycle Variations and Determination of Nucleation in Postnatal Cardiomyocytes
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Cited by 5 •
2017
To distinguish cell division from cell cycle variations in cardiomyocytes, we present protocols using two transgenic mouse lines: Myh6-H2B-mCh transgenic mice, for the unequivocal identification of cardiomyocyte nuclei, and CAG-eGFP-anillin mice, for distinguishing cell division from cell cycle variations.
09:53
Automated Microfluidic Blood Lysis Protocol for Enrichment of Circulating Nucleated Cells
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Cited by 4 •
2009
An automated microfluidic device was developed for circulating nucleated cell enrichment from peripheral blood via erythrocyte lysis that ensures isolation of high quality sample without cell loss.
09:36
The Use of High-resolution Infrared Thermography (HRIT) for the Study of Ice Nucleation and Ice Propagation in Plants
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Cited by 27 •
2015
Here we present a protocol that allows one to visualize sites of ice formation and avenues of ice propagation in plants utilizing high resolution infrared thermography (HRIT).
02:16
Transcription Factors
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2019
Tissue-specific transcription factors contribute to diverse cellular functions in mammals. For example, the gene for beta globin, a major component of hemoglobin, is present in all cells of the body. However, it is only expressed in red blood cells because the transcription factors that can bind to the promoter sequences of the beta globin gene are only expressed in these cells. Tissue-specific transcription factors also ensure that mutations in these factors may impair only the function of...
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Nucleation-promoting factors coordinate two linked events: they bind actin monomers through specialized domains and activate the Arp2/3 complex. The activated complex then positions a new actin filament branch on an existing filament, rather than merely increasing the availability of free monomers. This coordination converts molecular regulation into organized actin network assembly.
Branch placement matters because it links newly formed filaments to an existing actin structure. Nucleation-promoting factors help accelerate this network assembly by coupling monomer binding with Arp2/3 activation. The resulting organization supports actin-based structures associated with cell shape, movement, membrane remodeling, and the generation of actin-driven forces.
Their regulatory activity connects actin assembly with larger-scale cellular changes. By controlling where new filament branches form and how rapidly networks assemble, these proteins influence structures needed for cell shape, movement, and membrane remodeling. This connection makes their activity relevant to processes that depend on controlled cytoskeletal organization rather than unregulated filament formation.
In vitro systems can use these factors to reconstruct cytoskeletal networks outside the cell. Their ability to bind actin monomers and activate Arp2/3 provides a way to regulate filament branching and network assembly in a controlled setting. Such reconstructed networks help bioengineers examine actin organization and develop systems that reproduce aspects of actin-driven behavior.
Nucleation-promoting factors support biomimetic materials by providing a biological means to organize actin networks during material construction. Because they influence filament branching and assembly, researchers can incorporate their activity into designs that seek to reproduce cytoskeletal organization. This approach connects molecular control of actin with the development of materials inspired by cellular structures.
Their relevance comes from their capacity to regulate actin-driven forces and network organization in engineered settings. In synthetic cells or engineered tissues, this activity can help recreate cytoskeletal behaviors linked to movement, membrane remodeling, and cell shape. The same systems also provide context for studying intracellular transport, mechanosensing, and disorders caused by disrupted cytoskeletal organization.