Recombinant Mononucleosomes H3K4me1 (EPL) - biotinylated

Catalog No: 31585 Format: 20 µg $445 Buy
Expressed In: E. coli Protein Species: Human

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Expressed Protein Ligation

Recombinant Mononucleosomes H3K4me1 (EPL) - biotinylated 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.


Recombinant Mononucleosomes H3K4me1 - biotinylated (20 µg protein + 20 µg DNA) are supplied in 10 mM Tris-HCl, pH 8.0, 1 mM EDTA, 2 mM DTT and 20% glycerol. Please refer to product insert upon arrival for lot-specific concentration.


In vivo, histones are wrapped around by DNA in chromatin. Therefore, nucleosomes are more physiologically relevant substrates than histones and histone-derived peptides for in vitro studies. More importantly, some histone methyltransferases are significantly more active, as well as specific, when using nucleosomal substrates in HMT assays, such as DOT1L and NSD family enzymes. Nucleosomes are also widely used in histone methyltransferase screening assays to identify small molecular inhibitors for drug discovery.

Application Notes

Recombinant Mononucleosomes H3K4me1 (EPL) - biotinylated is suitable for use in the study of enzyme kinetics, inhibitor screening, and selectivity profiling.

Protein Details

Recombinant Mononucleosomes H3K4me1 (EPL) - biotinylated, consist of 167 bp of 601 DNA with 5’ biotin tag and two molecules each of histones H2A that includes amino acids 1-130 (end) (accession number NP_003503.1), H2B that includes amino acids 1-126 (end) (accession number NP_003509.1), H3.2 that includes amino acids 1-136 (end) (accession number NP_066403.2) with monomethylation at lysine 4, and H4 that includes amino acids 1-103 (end) (accession number NP_003539.1). All of these histones were expressed in E. coli cells. The molecular weight of histone octamer is ~108 kDa.
H3K4me3 (Histone H3 monomethyl Lys4) 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 monomethyl lysine 4 via a native peptide bond.

Streptavidin pull-down for Recombinant Mononucleosomes H3K4me1 (EPL) - biotinylated.

Streptavidin pull-down for Recombinant Mononucleosomes H3K4me1 (EPL) - biotinylated.
Mononucleosomes H3K4me1 (EPL) - biotinylated, were pulled down by streptavidin beads. Input mononucleosomes (Lane 1) and the mononucleosomes (Lane 2) pulled down by streptavidin were run on a 12.5% SDS-PAGE gel and stained with Coomassie Blue. The SDS-PAGE gel result shows that almost all of biotinylated polynucleosomes H3K4me1 are pulled down by streptavidin beads. * indicates streptavidin. Nucleosomes = Mononucleosomes

Recombinant Mononucleosomes H3K4me1 (EPL) - biotinylated DNA gel.

Recombinant Mononucleosomes H3K4me1 (EPL) - biotinylated, DNA gel.
Mononucleosomes H3K4me1 (EPL) - biotinylated, were run on a 2% agarose gel and stained with ethidium bromide. Lane 1: DNA marker. Lane 2: 601 DNA. Lane 3: Intact mononucleosomes. Intact mononucleosomes migrate much higher than free 601 DNA. The agarose gel result shows almost all of 601 DNA wraps histone octamers to form mononucleosomes. Nucleosomes = Mononucleosomes

Western Blot analysis for Recombinant Mononucleosomes H3K4me1 (EPL) - biotinylated.

Western Blot analysis for Recombinant Mononucleosomes H3K4me1 (EPL) - biotinylated.
Unmodified mononucleosomes (Lane 1) and Mononucleosomes H3K4me1 (Lane 2) were detected with anti-H3K4me1 antibody and anti-H4 antibody, respectively. H4 was detected as loading control. Only Mononucleosomes H3K4me1 can be detected by anti- H3K4me1 antibody. Nucleosomes = Mononucleosomes


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.


This product is for research use only and is not for use in diagnostic procedures. This product is guaranteed for 6 months from date of arrival.