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Related Concept Videos

Subcellular Fractionation01:32

Subcellular Fractionation

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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...
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Proteomics01:33

Proteomics

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A proteome is the entire set of proteins that a cell type produces. We can study proteomes using the knowledge of genomes because genes code for mRNAs, and the mRNAs encode proteins. Although mRNA analysis is a step in the right direction, not all mRNAs are translated into proteins.
Proteomics is the study of proteomes' function. It involves the large-scale systematic study of the proteome to denote the protein complement expressed by a genome. Scientist Mark Wilkins coined the term...
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Overview of Advanced Functional Groups02:22

Overview of Advanced Functional Groups

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Functional groups are groups of atoms with specific chemical properties that occur within organic molecules and are sometimes denoted as “R”. Functional groups can “functionalize” a compound by enabling it to adopt different physical and chemical properties.
Types of Advanced Functional Groups
The table below summarizes some of the major functional groups in organic chemistry.
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Factors Influencing Attraction I: Proximity01:22

Factors Influencing Attraction I: Proximity

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Proximity plays a fundamental role in shaping interpersonal attraction by increasing opportunities for interaction and fostering familiarity. Research consistently demonstrates that individuals are more likely to form social bonds with those who are physically closer to them, whether in residential settings, workplaces, or educational institutions. This effect is largely driven by the increased frequency of encounters, which facilitates the development of friendships and romantic...
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Extraction: Advanced Methods00:56

Extraction: Advanced Methods

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Metal ions can be separated from one another by complexation with organic ligands–the chelating agent– to form uncharged chelates. Here, the chelating agent must contain hydrophobic groups and behave as a weak acid, losing a proton to bind with the metal. Since most organic ligands used in this process are insoluble or undergo oxidation in the aqueous phase, the chelating agent is initially added to the organic phase and extracted into the aqueous phase. The metal-ligand complex is...
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Microtubule Associated Proteins (MAPs)01:42

Microtubule Associated Proteins (MAPs)

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Microtubule function and architecture are regulated by an array of specialized proteins called microtubule-associated proteins or MAPs. These proteins are widespread across different organisms and have conserved protein motifs, like the multi-TOG domain for tubulin binding found in the CLASP family of MAPs. Some MAPs are lineage-specific based on their conserved domains. Their functions depend upon the cytoskeletal architecture and cell type they are located within. In-plant cells, a specific...
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Related Experiment Video

Updated: Feb 1, 2026

Characterization of Neuronal Lysosome Interactome with Proximity Labeling Proteomics
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Characterization of Neuronal Lysosome Interactome with Proximity Labeling Proteomics

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Recent Advances in Proximity Labeling-Based Subcellular Proteomic Mapping.

Gang Wang1, Jiapeng Liu2, Xuege Sun3

  • 1College of Chemistry and Molecular Engineering, Synthetic and Functional Biomolecules Center, Beijing National Laboratory for Molecular Sciences, Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, PKU-IDG/McGovern Institute for Brain Research, Beijing Advanced Center of RNA Biology (BEACON), Peking University, Beijing, China.

Molecular & Cellular Proteomics : MCP
|January 30, 2026
PubMed
Summary
This summary is machine-generated.

New proximity labeling (PL) methods precisely map cellular proteomes, revealing protein localization, modifications, and interactions. Advanced techniques like optoPL and immunoPL offer spatiotemporal control for detailed subcellular proteome analysis.

Keywords:
antibody-targeted PLfunctional PLphotocatalytic PLprotein interactomeproximity labeling

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Area of Science:

  • Cellular Biology
  • Proteomics
  • Biochemistry

Background:

  • Cellular proteome spatial organization is crucial for physiological functions.
  • Protein localization influences post-translational modifications, trafficking, and interactions.
  • Understanding subcellular proteome organization enhances knowledge of protein functions.

Purpose of the Study:

  • To review emerging trends in proximity labeling (PL) techniques.
  • To highlight advancements in mapping subcellular proteomes with high precision.
  • To discuss new PL methods offering enhanced spatiotemporal control.

Main Methods:

  • Enzyme-mediated proximity labeling (PL) techniques (e.g., TurboID, APEX2).
  • Review of emerging PL methods for subcellular proteome mapping.
  • Discussion of photoactivatable PL (optoPL) and antibody-targeted PL (immunoPL).

Main Results:

  • PL techniques enable precise mapping of subcellular proteomes in living cells.
  • Emerging PL methods provide multi-dimensional protein features (PTMs, trafficking, turnover, interactions).
  • optoPL and immunoPL offer enhanced spatiotemporal control and detailed mapping without genetic manipulation.

Conclusions:

  • Advanced PL techniques are revolutionizing subcellular proteome analysis.
  • These methods provide unprecedented detail on protein localization and function.
  • Future research can leverage these tools for comprehensive proteome mapping.