HDAC8 Catalyzes the Hydrolysis of Long Chain Fatty Acyl Lysine
| Autor: | Hening Lin, Seth P. Miller, Pornpun Aramsangtienchai, Bin He, Lunzhi Dai, Yingming Zhao, Nicole A Spiegelman |
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| Rok vydání: | 2016 |
| Předmět: |
0301 basic medicine
Lysine Peptide Biology Nicotinamide adenine dinucleotide Biochemistry complex mixtures Histone Deacetylases Article 03 medical and health sciences Histone H3 chemistry.chemical_compound 0302 clinical medicine Amino Acid Sequence chemistry.chemical_classification Hydrolysis Fatty Acids General Medicine Repressor Proteins 030104 developmental biology chemistry Acetylation 030220 oncology & carcinogenesis Biocatalysis Molecular Medicine bacteria lipids (amino acids peptides and proteins) Histone deacetylase NAD+ kinase Fatty acylation |
| Zdroj: | ACS chemical biology. 11(10) |
| ISSN: | 1554-8937 |
| Popis: | The histone deacetylase (HDAC) family regulates many biological pathways through the deacetylation of lysine residues on histone and nonhistone proteins. Mammals have 18 HDACs that are classified into four classes. Class I, II, and IV are zinc-dependent, while class III is nicotinamide adenine dinucleotide (NAD+)-dependent lysine deacetylase or sirtuins. HDAC8, a class I HDAC family member, has been shown to have low deacetylation activity compared to other HDACs in vitro. Recent studies showed that several sirtuins, with low deacetylase activities, can actually hydrolyze other acyl lysine modifications more efficiently. Inspired by this, we tested the activity of HDAC8 using a variety of different acyl lysine peptides. Screening a panel of peptides with different acyl lysine modifications, we found that HDAC8 can catalyze the removal of acyl groups with 2-16 carbons from lysine 9 of the histone H3 peptide (H3K9). Interestingly, the catalytic efficiencies (kcat/Km) of HDAC8 on octanoyl, dodecanoyl, and myristoyl lysine are several-fold better than that on acetyl lysine. The increased catalytic efficiencies of HDAC8 on larger fatty acyl groups are due to the much lower Km values. T-cell leukemia Jurkat cells treated with a HDAC8 specific inhibitor, PCI-34051, exhibited an increase in global fatty acylation compared to control treatment. Thus, the de-fatty-acylation activity of HDAC8 is likely physiologically relevant. This is the first report of a zinc-dependent HDAC with de-fatty-acylation activity, and identification of HDAC8 de-fatty-acylation targets will help to further understand the function of HDAC8 and protein lysine fatty acylation. |
| Databáze: | OpenAIRE |
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