NAD-dependent protein deacetylase, which deacetylates internal lysines on histone and non-histone proteins. Deacetylates 'Lys-40' of alpha-tubulin. Involved in the control of mitotic exit in the cell cycle, probably via its role in the regulation of cytoskeleton. Deacetylates PCK1, opposing proteasomal degradation. Deacetylates 'Lys-310' of RELA. Interacts with HDAC6, suggesting that these proteins belong to a large complex that deacetylate the cytoskeleton. Widely expressed. Highly expressed in heart, brain and skeletal muscle, while it is weakly expressed in placenta and lung. Down-regulated in many gliomas suggesting that it may act as a tumor suppressor gene in human gliomas possibly through the regulation of microtubule network. Inhibited by Sirtinol, A3 and M15 small molecules. Inhibited by nicotinamide. Belongs to the sirtuin family. Class I subfamily. 4 isoforms of the human protein are produced by alternative splicing. Note: This description may include information from UniProtKB.
Biological Process: autophagy; cell division; cellular lipid catabolic process; chromatin silencing; chromatin silencing at rDNA; chromatin silencing at telomere; gene silencing; hepatocyte growth factor receptor signaling pathway; histone deacetylation; innate immune response; meiotic cell cycle; mitosis; myelination in the peripheral nervous system; negative regulation of apoptosis; negative regulation of autophagy; negative regulation of cell proliferation; negative regulation of fat cell differentiation; negative regulation of oligodendrocyte differentiation; negative regulation of protein catabolic process; negative regulation of striated muscle development; negative regulation of transcription from RNA polymerase II promoter; negative regulation of transcription, DNA-dependent; phosphoinositide 3-kinase cascade; positive regulation of attachment of spindle microtubules to kinetochore; positive regulation of cell division; positive regulation of DNA binding; positive regulation of meiosis; positive regulation of proteasomal ubiquitin-dependent protein catabolic process; positive regulation of transcription from RNA polymerase II promoter; proteasomal ubiquitin-dependent protein catabolic process; protein amino acid ADP-ribosylation; protein amino acid deacetylation; protein kinase B signaling cascade; regulation of cell cycle; regulation of exit from mitosis; regulation of myelination; regulation of phosphorylation; response to redox state; substantia nigra development; transcription, DNA-dependent
LTP: The number of records in which this modification site was determined using site-specific methods. SS methods include amino acid sequencing, site-directed mutagenesis, modification site-specific antibodies, specific MS strategies, etc.