Recombinant Histone H3R8me2a (asymmetric) (EPL)

Catalog No: 31276 Format: 25 µg $450 Buy

Expressed In: E. coli Protein Species: Human

Expressed Protein Ligation

Recombinant Histone H3R8me2a (asymmetric) (EPL) has been generated using the patented Expressed Protein Ligation (EPL) technology. EPL can be used to generate methylated, acetylated or phosphorylated histones. In EPL, the histone globular domain is ligated to a peptide that contains the N-terminal histone tail with the desired site-specific modification. The ligation reaction maintains the native histone bonds, and the resulting recombinant protein more closely mimics natural histones.

Contents

A representative Technical Data Sheet (TDS) is provided here. Please refer to the lot-specific TDS you will receive with your order for the lot-specific buffer contents and protein concentration.

Background

Histone H3 is one of the core components of the nucleosome. The nucleosome is the smallest subunit of chromatin and consists of 146 base pairs of DNA wrapped around an octamer of core histone proteins (two each of H2A, H2B, H3 and H4). Histone H1 is a linker protein, present at the interface between the nucleosome core and DNA entry/exit points.

Application Notes

Recombinant histones are suitable for use as positive controls in the analysis of histone post-translational modifications, as substrates for histone modification enzymes, or to generate chromatin in vitro.

Protein Details

Recombinant Histone H3 dimethyl Arg8 asymmetric (H3R8me2a) proteins are generated using expressed protein ligation (EPL) technology. Truncated human Histone H3.2 is produced in E. coli and purified using FPLC. The purified protein is subsequently ligated to a N-terminal histone tail peptide containing asymmetric dimethyl arginine 8 via a native peptide bond. The full-length protein is then repurified prior to lyophilization. Protein concentration was determined using the molar extinction coefficient for Histone H3 and absorbance at 280nm. The recombinant histone is >98% pure by SDS-PAGE and confirmed by high-resolution ESI-TOF mass spectrometry. The molecular weight of the recombinant histone is 15,254 Daltons. Please click on the image below to view the mass spectrum.

ESI-TOF mass spectrometry of Recominant Histone H3R8me2a

 

Recombinant Histone H3 dimethyl Arg8 analyzed by SDS-PAGE gel.
SDS-PAGE gel analysis of 2 micrograms of Recombinant Histone H3 dimethyl Arg8 (Lane1) and 1 microgram Recombinant Histone H3 dimethyl Arg8 (Lane 2).

Storage

Lyophilized proteins can be stored at -20°C or -80°C, preferably desiccated. Recombinant proteins in solution are temperature sensitive and must be stored at -80°C to prevent degradation. Avoid repeated freeze/thaw cycles and keep on ice when not in storage.

Guarantee

This product is guaranteed for 6 months from date of receipt.

This product is for research use only and is not for use in diagnostic procedures.