Recombinant Histone H3.3 (K27M)
|Aliases: Oncohistone H3.3 (K27M)|
|Catalog No: 31552||Format: 100 µg||$125||Buy|
|Catalog No: 31952||Format: 1 mg||$495||Buy|
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Expressed In: E. coli Protein Species: Human
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.
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.
Histone H3.1 and Histone H3.3 are the two main Histone H3 variants found in plants and animals. They are known to be important for gene regulation. Histone H3.1 and H3.3 have been shown to demonstrate unique genomic localization patterns thought to be associated with their specific functions in regulation of gene activity. Specifically, Histone H3.1 localization is found to coincide with genomic regions containing chromatin repressive marks (H3K9me3, H3K27me3 and DNA methylation), whereas Histone H3.3 primarily colocalizes with marks associated with gene activation (H3K4me3, H2BK120ub1, and RNA pol II occupancy). Deposition of the Histone H3.1 variant into the nucleosome correlates with the canonical DNA synthesis-dependent deposition pathway, whereas Histone H3.3 primarily serves as the replacement Histone H3 variant outside of S-phase, such as during gene transcription.
Oncohistones, including Histone H3.3 point mutations (K27 and G34), are present in 1/3 of pediatric glioblastomas. Up to 78% of diffuse intrinsic pontine gliomas (DIPGs) carries K27M and 36% of non-brainstem gliomas carries either K27M or G34R/V mutations. H3.3K27M expression synergizes with p53 loss and PDGFRA activation in neural progenitor cells derived from human embryonic stem cells, resulting in neoplastic transformation.
Recombinant Histone H3.3 (K27M) is suitable for use as substrate for histone modification enzymes, or to generate chromatin in vitro.
Recombinant Histone H3.3 (K27M) was expressed in E. coli cells as full length protein (accession number NP_002098.1) with a point mutant Lys27Met and has an observed molecular weight of 15.4 kDa. The recombinant histone H3.3 (K27M) is >85% pure by SDS-PAGE.
Protein Sequence (a.a. substitution in italics): ARTKQTARKS TGGKAPRKQL ATKAARMSAP STGGVKKPHR YRPGTVALRE IRRYQKSTEL LIRKLPFQRL VREIAQDFKT DLRFQSAAIG ALQEASEAYL VGLFEDTNLC AIHAKRVTIM PKDIQLARRI RGERA
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 guaranteed for 6 months from date of receipt.
This product is for research use only and is not for use in diagnostic procedures.