Cargo Selectivity
Cargo Selectivity - Related Videos
02:35
Visualizing Intracellular Transport of Cargo in Cultured Astrocytes
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2025
Source: Creighton, B. A., et al. Visualizing and Analyzing Intracellular Transport of Organelles and Other Cargos in Astrocytes. J. Vis. Exp. (2019)This video demonstrates the visualization of intracellular cargo transport in cultured astrocytes using a fluorescent acidotropic probe that selectively labels acidic endolysosomal vesicles. Time-lapse imaging and Z-stack acquisition with a confocal microscope allow tracking of fluorescently labeled cargo throughout the three-dimensional cell volume.
08:06
Identification of Kinesin-1 Cargos Using Fluorescence Microscopy
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Cited by 1 •
2016
Here, a protocol is presented to identify Kinesin-1 cargos. A motorless mutant of the Kinesin-1 heavy chain (KIF5B) aggregates in the cytoplasm and induces aggregation of its cargos. Both aggregates are detected under fluorescence microscopy. A similar strategy can be employed to identify cargos of other motor proteins.
09:00
Cargo Loading onto Kinesin Powered Molecular Shuttles
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Cited by 4 •
2010
Molecular shuttles consisting of functionalized microtubules gliding on surface-adhered kinesin motor proteins can serve as a nanoscale transport system. Here, the assembly of a typical shuttle system is described.
11:09
Characterizing the Composition of Molecular Motors on Moving Axonal Cargo Using "Cargo Mapping" Analysis
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Cited by 8 •
2014
Intracellular transport of cargoes, such as vesicles or organelles, is carried out by molecular motor proteins that track on polarized microtubules. This protocol describes the correlation of the directionality of transport of individual cargo particles moving inside neurons, to the relative amount and type of associated motor proteins.
10:16
Targeted Plasma Membrane Delivery of a Hydrophobic Cargo Encapsulated in a Liquid Crystal Nanoparticle Carrier
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Cited by 3 •
2017
A liquid crystal nanoparticle (LCNP) nanocarrier is exploited as a vehicle for the controlled delivery of a hydrophobic cargo to the plasma membrane of living cells.
FAQs
Sorting signals mark particular proteins or lipids for handling, while adaptor proteins and receptors help recognize those marks and connect cargo with membrane-trafficking machinery. That machinery packages the selected material into transport vesicles and supports delivery to a defined destination. Coordination among these components allows cells to include appropriate cargo while excluding molecules lacking the required recognition features.
Exclusion prevents transport vesicles from delivering unrelated molecules to the same destination. This selectivity helps preserve the characteristic molecular composition of organelles and supports their distinct cellular roles. If inappropriate proteins or lipids enter a compartment, its organization and function may be disturbed. Cargo recognition therefore contributes not only to delivery, but also to maintaining intracellular structure.
Errors in cargo recognition or sorting can misdirect proteins and lipids, disrupting intracellular organization and membrane traffic. Such defects may interfere with signaling, protein secretion, or membrane recycling because materials fail to reach the locations where they are needed. The resulting changes can contribute to disease, which makes recognition mechanisms important targets for biological investigation and therapeutic strategy development.
By directing selected molecules to organelles, the plasma membrane, or the extracellular space, cargo selectivity controls where signaling-related components and secreted proteins become available. Correct sorting can support the timing and location of these activities, whereas mistargeting may alter cellular communication or secretion. The process therefore links intracellular transport decisions with broader cellular regulation.
A conceptual analysis would follow the cargo from its sorting signal through recognition by adaptor proteins or receptors, packaging into a transport vesicle, and delivery to its destination. Researchers would then relate successful or defective sorting to organelle identity, signaling, secretion, or membrane recycling. This framework connects molecular recognition with observable effects on cellular organization and function.
Protein secretion, membrane recycling, signaling, and maintenance of organelle identity all provide important contexts. Each depends on sending selected proteins or lipids to appropriate locations while limiting delivery of unsuitable cargo. Studying these processes shows how transport specificity supports normal cell organization and helps reveal the consequences when sorting becomes inaccurate or incomplete.