Deacetylase Assay Kits

Histone deacetylase (HDAC) is considered to play a crucial role in regulating gene expression by changing nucleosome structure. HDAC is also thought to participate in regulation of cell cycle and differentiation, and it has been reported that the failure of this regulation leads to some types of cancer. Inhibition of HDAC activity by HDAC inhibitors such as trichostatin A (TSA) and suberoylanilide hydroxamic acid (SAHA) induces differentiation and/or apoptosis of transformed cells in vitro and inhibits tumor growth in a mouse model. It has been reported that HDAC inhibitors are effective for the medical treatment of acute promyelocytic leukemia (APL) and various cancers. Thus, HDAC inhibitors are expected to function as new anti-tumor drugs and antibacterial reagents. It is thought that screening of histone deacetylase inhibitors is likely to increase in the future, as one way to discover additional substances with similar properties.

• HDACs
• HDAC8
• SIRT

HDACs Deacetylase Fluorometric Assay Kit

CycLex HDACs Deacetylase Fluorometric Assay Kit measures the activity of HDAC by the basic principle of changing an HDAC reaction into the activity of the protease. Since it is very simple to measure common protease activity and it can be performed at a low price, the measurement of HDAC activity in most laboratories is possible if they are equipped with a fluorescent reader for microtiter plates. Given the widespread use of fully automatic apparatus to measure fluorescence intensity, HDAC activity measurement, which could not be made by the conventional method, is now possible with the CycLex HDACs Deacetylase Fluorometric Assay Kit using the same equipment. This new method of measurement should dramatically increase the efficiency of inhibitor screening and biochemical analysis of these enzymes.

Ver. 2 is now available. The new version is ready-to-use and enables easier assay than the conventional version.

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HDAC8 Deacetylase Fluorometric Assay Kit

The human HDACs are organized into three different classes based on their similarity to yeast HDAC proteins. Class I enzymes are ubiquitously expressed and include HDAC1, -2, -3, and -8, which are homologous to the yeast RPD3 protein. Class II includes HDAC4, -5, -6, -7, -9, and -10, which are similar to yeast HDA1 and are expressed in a tissue-specific manner. The Sir2-like class III HDACs, including SIRT1 to -7, require NAD+ for enzymatic activity.

It has been reported that HDAC8 is important for the growth of human tumor cell lines and has a distinct inhibition pattern that differs from that of HDAC1 and -3, which both share 43% sequence identity with HDAC8. These findings may lead to the development of selective inhibitors of this subtype as potential novel anticancer therapeutics.

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SIRT Deacetylase Fluorometric Assay Kit

Sir2 is a conserved protein and was recently shown to regulate lifespan extension both in budding yeast and nematode. In 2000, it was reported that the yeast Sir2 protein is a NAD+-dependent histone deacetylase that plays a critical role in transcriptional silencing, genome stability and longevity. In mammals, the homologs of Sir2 have been named sirtuins (SIRT), with seven members in a family termed SIRT1 through SIRT7. They share a conserved central deacetylase domain but have different N and C termini and display distinct subcellular localization, suggesting different biological functions.

SIRT1 has been shown to regulate the activity of the p53 tumor suppressor and inhibit apoptosis. These results have significant implications regarding an important role for SIRT1 in modulating the sensitivity of cells in p53-dependent apoptotic response and a possible effect in cancer therapy. Since the function of p53 significantly increases in combination with DNA damaging reagent, it is expected that inhibitor of SIRT1 becomes an effective anticancer drug.

Ver. 2 is now available. The new version is ready-to-use that enables easier assay than the conventional version.

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