Intracellular Localization
Intracellular Localization - Related Videos
09:06
Localization of Plasma Membrane and Intracellular Neuronal Nicotinic Acetylcholine Receptors Using Quantitative Imaging in Mammalian Cells
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2025
This protocol describes expression and quantification of neuronal nicotinic acetylcholine receptors subunits using the mammalian Neuro-2a cell line. pH-sensitive fluorescent tags and confocal microscopy enable precise evaluation of receptor localization at the plasma membrane versus those expressed in pH-neutral intracellular compartments, facilitating the study of nAChR trafficking and pharmacological modulation.
07:18
Intracellular Refolding Assay
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Cited by 9 •
2012
In this protocol a method to measure intracellular protein refolding after heat shock is described. This method can be used to study foldases like molecular chaperones and their co-factors or compounds able to influence their activity. Firefly luciferase activity is used as reporter to measure chaperone refolding activity.
11:18
Infection of Zebrafish Embryos with Intracellular Bacterial Pathogens
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Cited by 234 •
2012
Transparent zebrafish embryos have proved useful model hosts to visualize and functionally study interactions between innate immune cells and intracellular bacterial pathogens, such as Salmonella typhimurium and Mycobacterium marinum. Micro-injection of bacteria and multi-color fluorescence imaging are essential techniques involved in the application of zebrafish embryo infection models.
04:59
Evaluating the Intracellular Distribution of Virus-Derived Peptide-Modified Antibody Conjugates
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2025
This video demonstrates the process of assessing the intracellular distribution of virus-derived peptide-modified antibody conjugates using confocal microscopy. The viral-derived nuclear localization sequence directs antibody-conjugates within the cytoplasm, confirmed through immunostaining and fluorescence measurement.
10:24
Evaluation of Intracellular Location of Reactive Oxygen Species in Solea Senegalensis Spermatozoa
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Cited by 8 •
2018
This protocol describes a detailed methodology for detecting H2O2 localization within Solea senegalensis spermatozoa using a sensitive fluorochrome DCFH-DA for ROS, a live mitochondria stain for mitochondria, and DAPI for nuclei visualization, respectively. The protocol is designed to be performed within 2 h with either fresh or thawed spermatozoa.
FAQs
A molecule’s position within a cell can determine which partners it encounters, what substrates or signals it can access, and whether immune detection is possible. Consequently, the same host factor or pathogen may have different effects in the cytosol, nucleus, endosomes, or lysosomes. Mapping these locations helps connect spatial distribution with cellular function and infection-related outcomes.
Researchers compare the target’s signal with markers for specific organelles and assess whether the signals overlap, a process called colocalization. Combining this comparison with imaging or cell fractionation can separate targets associated with the cytosol, nucleus, endosomes, or lysosomes. These complementary approaches provide evidence about compartment residence rather than relying on a single visual signal.
Tracking where a pathogen appears inside infected cells can indicate stages relevant to entry, replication, or avoidance of immune detection. Its position may also show whether it encounters cellular antimicrobial pathways. Such spatial information helps investigators relate intracellular behavior to pathogenesis and determine how host compartments influence microbial survival or recognition.
A target can be labeled with a fluorescent probe or detected with an antibody, after which researchers image the cell to visualize its distribution. They may also separate cellular fractions and compare the target with organelle markers. Using these methods together can strengthen compartment assignments and distinguish broad localization patterns from associations with particular cellular structures.
Fluorescent probes and antibodies provide signals that identify the molecule, pathogen, or host factor being examined. Imaging then shows where that signal occurs within the cell, while comparison with organelle markers helps relate it to defined compartments. The resulting pattern can support analysis of access, immune recognition, or changes in distribution during infection or immune activation.
In infection studies, localization can clarify how microbes enter cells, replicate, evade detection, or encounter antimicrobial pathways. In immunology, it can show how immune proteins move during activation. These findings support mechanism-based investigations of pathogenesis and host defense, and they can help identify cellular locations relevant to therapeutic targeting.