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Rabbit anti-Human TriMethyl-Histone H3-K27 Polyclonal Antibody

Cat NoBPA-16718
Conjugate
TypeMethylated Antibody
SourceRabbit
Size50 uL
ApplicationWB; IHC; IF
FormatLiquid
ConcentrationPlease refer to the vial lable for the specific concentration.
BufferSupplied in PBS with 0.02% sodium azide,50% glycerol,pH7.3.
SpeciesHuman
StorageStore at -20℃. Avoid freeze / thaw cycles.
SynonymsH3.4;H3/g;H3FT;H3t;HIST3H3;Histone H3;HIST1H3A
PurificationAffinity purification
MolecularWeight17KDa
Description
BackgroundActin is a key regulator of RNA polymerase (Pol) II-dependent transcription. Positive transcription elongation factor b (P-TEFb), a Cdk9/cyclin T1 heterodimer, has been reported to play a critical role in transcription elongation. However, the relationship between actin and P-TEFb is still not clear. In this study, actin was found to interact with Cdk9, a catalytic subunit of P-TEFb, in elongation complexes. Using immunofluorescence and immunoprecipitation assays, Cdk9 was found to bind to G-actin through the conserved Thr-186 in the T-loop. Overexpression and in vitro kinase assays showed that G-actin promotes P-TEFb-dependent phosphorylation of the Pol II C-terminal domain. An in vitro transcription experiment revealed that the interaction between G-actin and Cdk9 stimulated Pol II transcription elongation. ChIP and immobilized template assays indicated that actin recruited Cdk9 to a transcriptional template in vivo and in vitro. Using cytokine IL-6-inducible p21 gene expression system, we revealed that actin recruited Cdk9 to endogenous gene. Moreover, overexpression of actin and Cdk9 increased histone H3 acetylation and acetylized histone H3 binding to a transcriptional template through the interaction with histone acetyltransferase, p300. Taken together, our results suggested that actin participates in transcription elongation by recruiting Cdk9 for phosphorylation of the Pol II C-terminal domain, and the actin-Cdk9 interaction promotes chromatin remodeling.
We can offer labeled proteins/antibodies using a broad range of intensely fluorescent dyes and labels including FITC, Biotin, Alexa Fluor, Rhodamine B, Cy, Co-Au.
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