Organelle Fraction Purification
Organelle Fraction Purification - Related Videos
07:11
Automated HPLC Separation Using LC-Mate: An Integrated Repetitive Autosampler and Fraction Collector for Microscale Purification
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2026
An integrated autosampler and fraction collector (LC-mate) was developed to automate repetitive HPLC separations. Compatible with HPLC detectors that output analog signals, LC-mate enhances the performance of manually operated systems and accelerates research workflows that depend on high-performance liquid chromatography.
11:51
Purification of the Dendritic Filopodia-rich Fraction
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2019
In this protocol, we introduce a method for purifying the dendritic filopodia-rich fraction from the phagocytic cup-like protrusion structure on cultured hippocampal neurons by taking advantage of the specific and strong affinity between a dendritic filopodial adhesion molecule, TLCN, and an extracellular matrix molecule, vitronectin.
15:39
Studying Organelle Dynamics in B Cells During Immune Synapse Formation
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Cited by 8 •
2019
Herein we describe two approaches to characterize cell polarization events in B lymphocytes during the formation of an IS. The first, involves quantification of organelle recruitment and cytoskeleton rearrangements at the synaptic membrane. The second is a biochemical approach, to characterize changes in composition of the centrosome, which undergoes polarization to the immune synapse.
10:39
Purification of Mitochondria from Yeast Cells
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Cited by 85 •
2009
We describe a rapid and effective method for purification of mitochondria from the yeast Saccharomyces cerevisiae. This method enables the high-yield isolation of pure mitochondria that are essentially free of contamination by other organelles and retain their structural and functional integrity after their purification.
11:22
GST-His purification: A Two-step Affinity Purification Protocol Yielding Full-length Purified Proteins
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Cited by 18 •
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In the present protocol, we demonstrate a highly efficient and cost-effective small-scale protein purification method, which allows purification of recombinant proteins by uniquely combining a cleavable GST-tag and a small His-tag.
FAQs
Centrifugation separates disrupted-cell components because particles respond differently to centrifugal force according to their size, mass, and buoyant density. Differential centrifugation emphasizes differences in sedimentation behavior, whereas density-gradient centrifugation allows particles to distribute according to density within the gradient. These physical differences determine which organelles accumulate in particular fractions and influence the specificity of downstream analysis.
Homogenization must disrupt cells sufficiently to release subcellular structures while avoiding excessive damage to the organelles being studied. The resulting material enters centrifugation as a mixture of cellular components, so the quality of this initial disruption affects later separation. Suitable buffer and temperature conditions further help preserve target fractions, supporting more reliable measurements of organelle composition and function.
Differential centrifugation separates components through successive sedimentation behavior, allowing cellular structures to be collected in different fractions based largely on physical differences such as size and mass. Density-gradient centrifugation adds a gradient that separates particles according to buoyant density. The choice between them depends on the desired separation and the degree of fraction distinction needed for organelle-specific studies.
A collected fraction may contain the intended organelle along with other subcellular structures, so its composition directly affects interpretation. Without careful purity assessment, a measured protein, membrane activity, or biochemical function may reflect contamination rather than the target organelle itself. This consideration is especially important when linking neuronal organelle properties to signaling, metabolism, or disease-related mechanisms.
A typical workflow begins with controlled cell disruption, followed by centrifugation steps that separate the resulting components. Researchers collect fractions under buffer and temperature conditions selected to preserve the target structures, using either differential or density-gradient centrifugation as appropriate. The isolated material can then be examined for organelle-specific composition or function, with purity considered when evaluating the results.
Purified synaptic vesicles can support studies of neurotransmitter storage, while mitochondrial fractions provide material for examining neuronal energy metabolism. Nuclear fractions can be used to investigate gene regulation, and microsomal membranes can support analysis of membrane protein activity. Comparing these organelle-specific properties helps researchers connect cellular dysfunction with neuronal signaling, neurodegeneration, and other brain disorders.