In the rapidly advancing field of molecular biology, the study of chromatin organization and gene regulation has become increasingly sophisticated. Central to t A pair of readers of histone H3K4 methylation recruit his research is the H3K4me2 peptide, a critical tool for scientists investigating how histone modifications influence biological processes. By providing a c Histone methylation peptides of histone H3 and H4include mono-methylated, di-methylated, tri-methylated and biotinylated sequences. ontrolled, synthetic model, these peptides allow researchers to dissect the complex interactions between proteins an Examining the roles of H3K4 methylation states with - PMC d the histone code without the variables present in live cell samples.
What is an H3K4me2 Peptide?
At its core, an H3K4me2 peptide is a synthetic peptide derived from by PV Pena·2006·Cited by 827—H3K4me3, H3K4me2 or H3K4me1 peptideswere gradually added to the 15N-labelled ING2 PHD finger (Fig. 2 and Supplementary Fig. 2). An almost Read more the region of human histone H3 containing the dimethylated lysine 4. This specific modification—the addition of two methyl groups to the fourth lysine residue—serves as a key epigenetic marker. As a synthetic peptide corresponding to the region of human histone H3, it is des Histone H3K4me2 Peptideis ideal for the study of proteins that interact with histones and that read, write or erase histone modifications. Alternative Names Read more igned to mimic the naturally occurring state of chromatin, providing a standardized substrate for laboratory assays.
When researchers utilize a Histone H3K4me2 Peptide, they are often focused on the "reader," "writer," and "eraser" proteins that recognize or modify these specific histone states. Because these peptides are synthesized under strict conditions, they offer high purity and reproducibility, which is essential for accurate binding studies.
Applicat The H3K4(Me2) (1-20)peptideis a histone H3-derivedpeptideencompassing residues 1 to 20, featuring dimethylation at lysine 4 (H3K4me2).Read more ions and Experimental Use
The utility of these tools spans across various experimental methodologies:
* Protein-Interaction Studies: Many studies utilize biotinylated H3K4me2 to perform pull-down assays. By attaching a biotin tag, researchers can easily isolate the peptide and any proteins that bind to it from complex nuclear extracts.
* Enzyme Activity Assays: These products are frequently used to characterize the enzymes that add or remove methyl groups. For instance, comparing the binding affinity of proteins to H3K4me3, H3K4me2, or H3K4me1 peptides helps map the specificity of PHD finger domains and other chromatin-associated proteins.
* Structural Biology: High-resolution structural analysis often relies on these molecules to reveal how proteins dock onto the histone tail. It is well-documented that the ING2 PHD domain links histone H3 lysine 4 methylation to regulatory pathways, with binding strengths varying significantly between di-methylated and tri-methylated states.
The Broader Context: Histone Methylation
The landscape of histone methylation peptides of histone H3 and H4 is vast. Researchers often compare different states, such as H3K4me2 vs H3K4me3, to understand how subtle chemical changes result in distinct biological outcomes. For exam by T Noyori·2025—The dimethylation of histone H3 lysine 4 (H3K4me2) plays an important role in developmental phase transitions in plants, ple, research has shown that H3K4me2 regulates the recovery of protein biosynthesis and homeostasis following cellular stress, a finding that highlights the functional importance of this medium-level methylation state.
Furthermore, H3K4me2 editing induced a profound alteration of SMC lineage identity, demonstrating that the precise distribution of these marks can influence cell fate. Whether working with recombinant Histone H3 dimethyl Lys4 (H3K4me2) proteins or shorter synthetic sequences, the goal remains the same: to decode the instructions written into our chromatin.
Best Practices for Handling
For those working in the lab, it is important to note that the H3K4me2 modification is sensitive to storage conditions. To maintain Peptide-based approaches to identify and characterize the integrity of the synthesized dimethyl histone H3-K4 peptide, standard laboratory protocols recommend storing these reagents at 4°C for short-term use, or at -20°C or -80°C for long-term stability. Always refer to the manufacturer’s data sheet for specific buffer and reconstitution requirements to ensure the 3K4me2 signal remains consistent across your experiments.
In summary, whether you are investigating trimethylated H3 lysine 4 (H3K4me3) or the di-methylated variant, these synthetic tools are indispensable. By providing a clear, verifiable, and consistent substrate, they allow the scientific community to push the boundaries of our understanding of gene regulation and chromatin dynamics.