SILAC-based quantification of Sirt1-responsive lysine acetylome

Area of Science:

• Proteomics
• Biochemistry
• Cell Biology

Background:

• Stable Isotope Labeling by Amino acids in Cell culture (SILAC) is a key in vivo metabolic labeling technique.
• Dynamic analysis of protein modifications is crucial for understanding cellular processes.
• Lysine acetylation is a significant post-translational modification involved in various cellular functions.

Purpose of the Study:

• To present a generalizable method combining SILAC, acetyllysine peptide enrichment, and mass spectrometry.
• To investigate dynamic changes in the lysine acetylome in response to Sirt1 activity.
• To demonstrate the applicability of the method for studying other post-translational modifications.

Main Methods:

• Stable Isotope Labeling by Amino acids in Cell culture (SILAC) for metabolic labeling.
• Affinity enrichment of acetyllysine peptides.
• Mass spectrometry for quantitative analysis.

Main Results:

• The study successfully applied the combined SILAC and acetyllysine enrichment method.
• Dynamic changes in the lysine acetylome were quantified in response to Sirt1.
• The method proved effective for sensitive detection of protein modification dynamics.

Conclusions:

• The described approach provides a robust platform for studying dynamic lysine acetylation.
• This methodology is adaptable for the quantitative analysis of other post-translational modifications.
• The technique facilitates deeper insights into cellular signaling pathways and regulatory mechanisms.