Subcellular Classification
Subcellular Classification - Related Videos
11:19
Imaging Subcellular Structures in the Living Zebrafish Embryo
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Cited by 8 •
2016
Imaging the dynamic behavior of organelles and other subcellular structures in vivo can shed light on their function in physiological and disease conditions. Here, we present methods for genetically tagging two organelles, centrosomes and mitochondria, and imaging their dynamics in living zebrafish embryos using wide-field and confocal microscopy.
01:32
Subcellular Fractionation
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2023
The homogenate obtained after cell lysis contains various membrane-bound organelles that can be further separated into pure fractions by subcellular fractionation. These isolates are used to study specific cellular components, analyze localized protein activity, and are even employed in diagnostics. Fractionation is typically achieved using centrifugation methods, the most common being density-gradient and differential centrifugation. Differential Centrifugation Differential centrifugation is...
04:10
Measuring Proteasome Activity in Different Subcellular Compartments of the Rat Brain
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2025
This video demonstrates how to measure proteasome activity in different subcellular compartments of the lateral amygdala from fear-conditioned and control rat brains using a fluorogenic peptide assay. The proteasome cleaves the fluorogenic peptide substrate, releasing fluorescent molecules, which are quantified using a plate reader to assess proteasome activity in the nuclear and synaptic protein fractions. Increased nuclear activity suggests changes in gene expression, while reduced synaptic...
05:04
An Immunolabeling Technique to Visualize the Subcellular Localization of Proteins
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2025
This video demonstrates a technique for the immunolabeling of sigma-1 receptors in a murine heart tissue section using quantum dots. The heart tissue is fixed, osmicated, stained, dehydrated, embedded in resin, and then sectioned. The sections are then treated with antibodies and labeled with quantum dots to demarcate the subcellular localization of Sigma-1 receptors using electron microscopy.
09:20
In situ Subcellular Fractionation of Adherent and Non-adherent Mammalian Cells
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Cited by 29 •
2010
In situ subcellular fractionation of mammalian cells on microscope coverslips allows the visualisation of protein localisation.
FAQs
Whole-cell categories can conceal meaningful differences between internal compartments. Subcellular Classification separates features of nuclei, axons, dendrites, synapses, and organelles, allowing researchers to connect localized molecular or structural properties with specific cellular functions. This finer resolution can clarify how distinct compartments contribute to neuronal identity, signaling, and the organization of neural circuits.
Researchers combine microscopy with molecular labeling and transcriptomic or proteomic profiling to examine complementary aspects of a compartment. Microscopy contributes structural information, labeling identifies selected molecular features, and profiling describes molecular composition. Considering these data together supports a more complete interpretation of how internal cellular organization relates to neuronal function rather than relying on one feature alone.
A molecular change restricted to a particular compartment may alter the role of that compartment without being obvious from whole-cell measurements. Examining localized composition in axons, dendrites, synapses, nuclei, or organelles helps researchers relate such changes to signaling and, ultimately, circuit activity. This connection provides a way to study cellular abnormalities across multiple levels of organization.
A study typically identifies the compartments of interest, examines them with microscopy, applies molecular labeling, and then uses transcriptomic or proteomic profiling to characterize their composition. Researchers can integrate these observations to distinguish cellular features and relate them to function. The resulting classification can then be used to interpret neuronal subtypes, synaptic organization, or localized abnormalities.
This approach is useful when whole-cell descriptions do not sufficiently explain neuronal diversity or connectivity. In neuroscience, it can support identification of neuronal subtypes, analysis of synaptic organization, and investigation of brain connectivity. It is also relevant to neurodevelopmental studies, where compartment-specific features may help connect cellular organization with broader changes in neural systems.
Subcellular Classification helps connect abnormalities in specific cellular compartments with broader cellular and systems-level outcomes. By examining localized molecular and structural features, researchers can investigate how changes within neurons relate to development, signaling, circuit activity, or disease-associated effects. This provides a framework for studying neurological conditions without treating every alteration as a uniform whole-cell change.