Recombinant human KMT1A / SUV39H1 protein (ab80289)



  • Nature
  • Source
    Escherichia coli
  • Amino Acid Sequence
    • Accession
    • Species
    • Molecular weight
      64 kDa including tags
    • Amino acids
      82 to 412
    • Tags
      GST tag N-Terminus


Our Abpromise guarantee covers the use of ab80289 in the following tested applications.

The application notes include recommended starting dilutions; optimal dilutions/concentrations should be determined by the end user.

  • Biological activity

    Specific Activity: 3.5 pmol/min/μg.


    Assay conditions: 50 μl reaction mix (50 mM TRIS pH 8.8, 5mM MgCl2, 4mM DTT, 0.05% Tween-20, 40 μM S-adenosylmethionine, and 10-100 ng SUV39H1) add to the wells coated with the substrate on a GBioscience Neutravidin black plate. Incubate for 1 hr. Add antibody against methylated K9 residue of histone H3, incubate 1 hr. Then, add secondary HRP-labeled antibody and
    incubate 30 min. Finally, add HRP chemiluminescent substrates and read luminescence.



  • Applications

    Functional Studies


  • Form
  • Concentration information loading...

Preparation and Storage

  • Stability and Storage

    Shipped on Dry Ice. Upon delivery aliquot. Store at -80°C. Avoid freeze / thaw cycle.

    pH: 8.00
    Constituents: 0.0462% DTT, 0.395% Tris HCl, 0.05% Tween, 30% Glycerol, 0.58% Sodium chloride

    This product is an active protein and may elicit a biological response in vivo, handle with caution.

General Info

  • Alternative names
    • H3 K9 HMTase1
    • H3-K9-HMTase 1
    • Histone H3-K9 methyltransferase 1
    • Histone H3-K9 methyltransferase1
    • Histone lysine N methyltransferase, H3 lysine 9 specific 1
    • Histone-lysine N-methyltransferase SUV39H1
    • KMT1 A
    • KMT1A
    • Lysine N methyltransferase 1A
    • Lysine N-methyltransferase 1A
    • MG44
    • mIS6
    • Position-effect variegation 3-9 homolog
    • Su(var)3 9 homolog 1
    • Su(var)3-9 homolog 1
    • Suppressor of variegation 3 9 homolog 1 (Drosophila)
    • Suppressor of variegation 3-9 homolog 1
    • SUV39 H1
    • SUV39H
    • SUV39H1
    • SUV91_HUMAN
    see all
  • Function
    Histone methyltransferase that specifically trimethylates 'Lys-9' of histone H3 using monomethylated H3 'Lys-9' as substrate. Also weakly methylates histone H1 (in vitro). H3 'Lys-9' trimethylation represents a specific tag for epigenetic transcriptional repression by recruiting HP1 (CBX1, CBX3 and/or CBX5) proteins to methylated histones. Mainly functions in heterochromatin regions, thereby playing a central role in the establishment of constitutive heterochromatin at pericentric and telomere regions. H3 'Lys-9' trimethylation is also required to direct DNA methylation at pericentric repeats. SUV39H1 is targeted to histone H3 via its interaction with RB1 and is involved in many processes, such as repression of MYOD1-stimulated differentiation, regulation of the control switch for exiting the cell cycle and entering differentiation, repression by the PML-RARA fusion protein, BMP-induced repression, repression of switch recombination to IgA and regulation of telomere length. Component of the eNoSC (energy-dependent nucleolar silencing) complex, a complex that mediates silencing of rDNA in response to intracellular energy status and acts by recruiting histone-modifying enzymes. The eNoSC complex is able to sense the energy status of cell: upon glucose starvation, elevation of NAD(+)/NADP(+) ratio activates SIRT1, leading to histone H3 deacetylation followed by dimethylation of H3 at 'Lys-9' (H3K9me2) by SUV39H1 and the formation of silent chromatin in the rDNA locus. Recruited by the large PER complex to the E-box elements of the circadian target genes such as PER2 itself or PER1, contributes to the conversion of local chromatin to a heterochromatin-like repressive state through H3 'Lys-9' trimethylation.
  • Sequence similarities
    Belongs to the class V-like SAM-binding methyltransferase superfamily. Histone-lysine methyltransferase family. Suvar3-9 subfamily.
    Contains 1 chromo domain.
    Contains 1 post-SET domain.
    Contains 1 pre-SET domain.
    Contains 1 SET domain.
  • Developmental stage
    Accumulates during mitosis at centromeres during prometaphase, but dissociates from the centromere at the meta- to anaphase transition.
  • Domain
    Although the SET domain contains the active site of enzymatic activity, both pre-SET and post-SET domains are required for methyltransferase activity. The SET domain also participates to stable binding to heterochromatin.
    In the pre-SET domain, Cys residues bind 3 zinc ions that are arranged in a triangular cluster; some of these Cys residues contribute to the binding of two zinc ions within the cluster.
  • Post-translational
    Phosphorylated on serine residues, and to a lesser degree, on threonine residues. The phosphorylated form is stabilized by SBF1 and is less active in its transcriptional repressor function.
    Acetylated at Lys-266, leading to inhibition of enzyme activity. SIRT1-mediated deacetylation relieves this inhibition.
  • Cellular localization
    Nucleus. Nucleus lamina. Nucleus, nucleoplasm. Chromosome, centromere. Associates with centromeric constitutive heterochromatin.
  • Information by UniProt


  • Image showing specific activity of ab80289.


  • 10% SDS-PAGE showing ab80289 at approximately 64kDa (3µg). 2μg of protein loaded.


ab80289 has not yet been referenced specifically in any publications.

Customer reviews and Q&As

The laboratory expects this protein to be active on mouse cells as well, since the Histone substrate is homologous between mouse and human.

The protocol for validating the activity of this protein is given below. The resulting data is graphed ...

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