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Updated: Jul 5, 2026
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Sequence-specific Labeling of Nucleic Acids and Proteins with Methyltransferases and Cofactor Analogues
Published on: November 22, 2014
Biosynthetic labeling of proteins
1National Institute of Child Health and Human Development, Bethesda, Maryland, USA.
Current Protocols in Immunology
|April 25, 2008
Summary
Biosynthetic labeling allows researchers to study protein dynamics. This unit details methods for labeling secreted and membrane proteins in various cell types for comprehensive analysis.
Area of Science:
- Biochemistry
- Cell Biology
- Molecular Biology
Background:
- Biosynthetic labeling is crucial for understanding protein functions, including synthesis, processing, transport, secretion, and degradation.
- Studying secreted and membrane proteins requires specific labeling techniques to track their lifecycle within cells.
Purpose of the Study:
- To provide detailed protocols for biosynthetically labeling secreted and membrane proteins.
- To offer methods applicable to both suspension and adherent cells, as well as various labeling durations.
Main Methods:
- Short-term labeling (30 min to 3 hr) for suspension cells.
- Modified protocols for adherent cells.
- Long-term (3 to 24 hr) and pulse-chase labeling techniques.
- Support protocol for determining label incorporation.
- Utilizing cells from suspension cultures or single-cell suspensions (spleen, thymus).
Main Results:
- Established protocols enable effective biosynthetic labeling of diverse proteins.
- Methods are adaptable for different cell types and experimental timeframes.
- Label incorporation can be reliably quantified.
Conclusions:
- The described protocols offer a versatile toolkit for researchers studying protein biochemistry and cell biology.
- These methods facilitate in-depth analysis of protein dynamics, transport, and fate.
- The techniques are suitable for a wide range of experimental designs involving secreted and membrane proteins.
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