Cell Signaling Technology

Product Pathways - Screening Technologies

Tri-Methyl Lysine Motif [tme-K] (D1L1X) Rabbit mAb #14680

lysine   methyl   motif  

No. Size Price
14680S 100 µl ( 10 western blots ) ¥3,900.00 现货查询 购买询价
14680 carrier free & custom formulation / quantityemail request
Applications Dilution Species-Reactivity Sensitivity MW (kDa) Isotype
W 1:1000 All Species Expected, Endogenous Rabbit IgG

Species cross-reactivity is determined by western blot.

Applications Key: W=Western Blotting,

Homology

Species predicted to react based on 100% sequence homology: All Species Expected,

Specificity / Sensitivity

Tri-Methyl Lysine Motif [tme-K] (D1L1X) Rabbit mAb recognizes endogenous levels of proteins only when tri-methylated at a lysine residue. This antibody does not cross-react with endogenous levels of proteins with mono- or di-methylated lysine or arginine residues.

Source / Purification

Monoclonal antibody is produced by immunizing animals with a synthetic peptide library containing tri-methyl lysine.

ELISA-Peptide

ELISA-Peptide

The specificity of Tri-Methyl Lysine Motif [tme-K] (D1L1X) Rabbit mAb was determined using peptide ELISA. The figure demonstrates that the antibody is specific for tri-methyl lysine and does not cross-react with mono- or di-methyl lysine or arginine.

Western Blotting

Western Blotting

Western blot analysis of HeLa cells, untreated (-) or treated with adenosine-2',3'-dialdehyde (AdOx, 100 μM, 24hr; +), using Tri-Methyl Lysine Motif [tme-K] (D1L1X) Rabbit mAb (upper) and GAPDH (D16H11) XP® Rabbit mAb #5174 (lower).

Background

Methylation of lysine residues is a common regulatory posttranslational modification (PTM) that results in the mono-, di-, or tri-methylation of lysine at ε-amine groups by protein lysine methyltransferases (PKMTs). Two PKMT groups are recognized based on structure and catalytic mechanism: class I methyltransferases or seven β strand enzymes, and SET domain-containing class V methyltransferases. Both use the methyl donor S-adenosyl-L-methionine to methylate histone and non-histone proteins. Class I methyltransferases methylate amino acids, DNA, and RNA (1,2). Six methyl-lysine-interacting protein families are distinguished based on binding domains: MBT, PHD finger, Tudor, PWWP, WD40 repeat, and chromodomains. Many of these display differential binding preferences based on lysine methylation state (3). KDM1 subfamily lysine demethylases catalyze demethylation of mono- and di-methyl lysines, while 2-oxoglutarate-dependent JmjC (KDM2-7) subfamily enzymes also modify tri-methyl lysine residues (4).

Most PKMT substrates are histone proteins and transcription factors, emphasizing the importance of lysine methylation in regulating chromatin structure and gene expression. Lys9 of histone H3 is mono- or di-methylated by G9A/GLP and tri-methylated by SETDB1 to activate transcription. JHDM3A-mediated demethylation of the same residue creates mono-methyl Lys9 and inhibits gene transcription (5). Tumor suppressor p53 is regulated by methylation of at least four sites. p53-mediated transcription is repressed following mono-methylation of p53 at Lys370 by SMYD2; di-methylation at the same residue further inhibits p53 by preventing association with 53BP1. Concomitant di-methylation at Lys382 inhibits p53 ubiquitination following DNA damage. Mono-methylation at Lys382 by SET8 suppresses p53 transcriptional activity, while SET7/9 mono-methylation at Lys372 inhibits SMYD2 methylation at Lys370 and stabilizes the p53 protein. Di-methylation at Lys373 by G9A/GLP inhibits p53-mediated apoptosis and correlates with tri-methylation of histone H3 Lys9 at the p21 promoter (1,6). Overexpression of PKMTs is associated with multiple forms of human cancer, which has generated tremendous interest in targeting protein lysine methyltransferases in drug discovery research.

  1. Lanouette, S. et al. (2014) Mol Syst Biol 10, 724.
  2. Clarke, S.G. (2013) Trends Biochem Sci 38, 243-52.
  3. Herold, J.M. et al. (2011) Curr Chem Genomics 5, 51-61.
  4. Thinnes, C.C. et al. (2014) Biochim Biophys Acta 1839, 1416-32.
  5. Klose, R.J. et al. (2006) Nature 442, 312-6.
  6. Yost, J.M. et al. (2011) Curr Chem Genomics 5, 72-84.

Application References

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For Research Use Only. Not For Use In Diagnostic Procedures.

Use of Cell Signaling Technology (CST) Motif Antibodies within certain methods (e.g., U.S. Patents No. 7,198,896 and 7,300,753) may require a license from CST. For information regarding academic licensing terms please have your technology transfer office contact CST Legal Department at CST_ip@cellsignal.com. For information regarding commercial licensing terms please contact CST Pharma Services Department at ptmscan@cellsignal.com.

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