Protein Subcellular Localization
Protein Subcellular Localization - Related Videos
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.
09:59
Utilizing pHluorin-tagged Receptors to Monitor Subcellular Localization and Trafficking
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Cited by 3 •
2017
Labeling the extracellular domain of a membrane protein with a pH sensitive fluorophore, superecliptic pHluorin (SEP), allows subcellular localization, expression, and trafficking to be determined. Imaging SEP-labeled proteins with total internal reflection fluorescence microscopy (TIRFM) enables the quantification of protein levels in the peripheral ER and plasma membrane.
05:57
Live-Cell Fluorescence Microscopy to Investigate Subcellular Protein Localization and Cell Morphology Changes in Bacteria
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Cited by 18 •
2019
This article provides a step-by-step guide to investigate protein subcellular localization dynamics and to monitor morphological changes using high-resolution fluorescence microscopy in Bacillus subtilis and Staphylococcus aureus.
13:13
Nano-fEM: Protein Localization Using Photo-activated Localization Microscopy and Electron Microscopy
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Cited by 14 •
2012
We describe a method to localize fluorescently tagged proteins in electron micrographs. Fluorescence is first localized using photo-activated localization microscopy on ultrathin sections. These images are then aligned to electron micrographs of the same section.
05:19
An Immunofluorescence Technique for Viral Protein Localization in Infected Cells
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2025
This video demonstrates a method for monitoring infected cell protein 0, ICP0 trafficking in herpes simplex virus-1 infection. Post-de novo synthesis, ICP0 translocates to the nucleus, later moving to the cytoplasm during infection progression. Immunofluorescence microscopy reveals and analyzes the protein's subcellular localization, offering insights into its trafficking across infection phases.
FAQs
Targeting signals act as molecular address information that helps direct proteins toward particular cellular destinations. They are recognized by molecular transport pathways that guide proteins to locations such as the nucleus, mitochondria, synapses, or membranes. This routing establishes compartment-specific distributions, helping researchers relate a protein’s location to cellular function rather than measuring its presence across the whole cell.
Protein subcellular localization can change when cellular conditions change because regulated trafficking can redirect proteins between destinations. In neurons, such redistribution may alter where proteins participate in neurotransmission, axonal transport, synaptic plasticity, or neuronal signaling. Tracking these shifts helps investigators study dynamic cellular responses rather than treating localization as fixed.
Abnormal localization can provide a spatial explanation for impaired neuronal communication and disease-related cellular dysfunction. Mapping protein positions may reveal changes associated with neurodevelopmental disorders or neurodegeneration, even when the central question concerns neurotransmission, synaptic plasticity, or signaling. This makes localization analysis useful for linking molecular distribution to broader neuronal outcomes.
Fluorescence microscopy can display protein-associated signals in neuronal compartments, while cell fractionation and tagged-protein analysis provide additional ways to examine distribution. Using more than one approach can help investigators assess localization from complementary perspectives and identify patterns relevant to axonal transport, synaptic function, or neuronal signaling.
It allows researchers to observe protein-associated fluorescence within neuronal structures and compare signal across destinations such as synapses, membranes, or other cellular compartments. This spatial readout is especially useful for connecting a protein’s position with neurotransmission, synaptic plasticity, or signaling, and for recognizing localization patterns that differ from expected neuronal organization.
Cell fractionation offers a compartment-oriented way to examine where proteins are distributed. In a localization study, its results can be considered alongside fluorescence microscopy or tagged-protein analysis to strengthen interpretation of whether a protein is associated with a particular cellular destination. This is relevant when investigating neuronal signaling or transport.
Tagged-protein analysis can help follow a protein’s distribution as it reaches or occupies neuronal destinations. In neuroscience, this approach can support studies of axonal transport, synaptic localization, and signaling by making protein positioning experimentally trackable. It is also useful for examining abnormal localization patterns linked with neurodevelopmental disorders or neurodegeneration.