Identification of potential HDAC11 deacylase substrates by affinity pulldown MS.

Area of Science:

• Biochemistry
• Proteomics
• Molecular Biology

Background:

• Lysine fatty acylation is a critical protein posttranslational modification (PTM) involved in numerous biological processes.
• Histone deacetylase 11 (HDAC11) is the only Class IV member of the histone deacetylase (HDAC) family and exhibits significant lysine de-fatty-acylase activity.
• Understanding HDAC11's function requires identifying its physiological substrates and the proteins it interacts with.

Purpose of the Study:

• To develop and detail a method for identifying the interactome of HDAC11.
• To uncover the physiological substrates regulated by HDAC11 through interactome profiling.
• To establish a versatile SILAC-based proteomics strategy applicable to other PTM enzymes.

Main Methods:

• Utilized Stable Isotope Labeling with Amino acids in cell culture (SILAC) for quantitative proteomics.
• Performed interactome profiling to identify proteins binding to HDAC11.
• Applied mass spectrometry-based proteomics to analyze protein interactions.

Main Results:

• Successfully identified the HDAC11 interactome using the described SILAC proteomics strategy.
• The method provides a foundation for discovering novel substrates of HDAC11.
• This approach is adaptable for studying the interactomes of other posttranslational modification enzymes.

Conclusions:

• The developed SILAC method is effective for identifying the interactome of HDAC11 and its potential substrates.
• This research facilitates a deeper understanding of lysine fatty acylation and its regulation by HDAC11.
• The methodology can be broadly applied to investigate other PTM enzymes and their biological roles.