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Direct-Blot™ HRP anti-RNA Polymerase II RPB1 Antibody

Pricing & Availability
Clone
H14 (See other available formats)
Regulatory Status
RUO
Other Names
DNA-directed RNA polymerase II subunit RPB1, RNA polymerase II subunit B1, DNA-directed RNA polymerase II subunit A, RNA-directed RNA polymerase II subunit RPB1, DNA-directed RNA polymerase III largest subunit
Isotype
Mouse IgM, κ
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Product Citations
publications
H14_DB-HRP_RNAPolymeraseII__1_050118
Western blot analysis of 15 µg cell lysates from HT29 and Raw264.7 cells. Samples were resolved by electrophoresis (4-20% Tris-glycine gel), transferred to nitrocellulose, and probed with 0.05 and 0.1 µg/ml Direct-Blot™ HRP, or 1 µg/ml purified anti-RNA Polymerase II antibody, clone H14. Direct-Blot™ HRP anti-β-actin was used as a loading control (Cat. No. 643807, 1:8000 dilution).
  • H14_DB-HRP_RNAPolymeraseII__1_050118
    Western blot analysis of 15 µg cell lysates from HT29 and Raw264.7 cells. Samples were resolved by electrophoresis (4-20% Tris-glycine gel), transferred to nitrocellulose, and probed with 0.05 and 0.1 µg/ml Direct-Blot™ HRP, or 1 µg/ml purified anti-RNA Polymerase II antibody, clone H14. Direct-Blot™ HRP anti-β-actin was used as a loading control (Cat. No. 643807, 1:8000 dilution).
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920305 25 µL $112
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920306 100 µL $340
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Description

RPB1 is the catalytic and largest component of RNA polymerase II, which synthesizes mRNA precursors and many functional non-coding RNAs. It forms the polymerase active center together with RPB2, the second largest subunit. Polymerase II (Pol II) is the central component of the basal RNA polymerase II transcription machinery. It is composed of mobile elements that move relatively to each other. RPB1 is part of the core element with the central large cleft, the clamp element that moves to open and close the cleft, and the jaws that are thought to grab the incoming DNA template. At the start of transcription, a single DNA template strand of the promoter is positioned within the central active site cleft of Pol II. Then, a bridging helix emanates from RPB1 and crosses the cleft near the catalytic site, which acts as a ratchet that moves the RNA-DNA hybrid through the active site by switching from straight to bent conformations during each nucleotide addition. This promotes translocation of Pol II. Pol II moves on the template during transcription elongation. Elongation is influenced by the phosphorylation status of the C-terminal domain (CTD) of Pol II's largest subunit (RPB1), which serves as a platform for assembling factors that regulate transcription initiation, elongation, termination, and mRNA processing. It can act as a RNA-dependent RNA polymerase when associated with small delta antigen of Hepatitis delta virus, being able to conform as both a replicate and transcriptase for the viral RNA circular genome.

Product Details
Technical data sheet

Product Details

Verified Reactivity
Human, Mouse, Rat
Antibody Type
Monoclonal
Host Species
Mouse
Formulation
This antibody is provided in 50% glycerol in aqueous buffered solutions with preservatives.
Preparation
The antibody was purified by affinity chromatography and conjugated with HRP under optimal conditions.
Concentration
Lot-specific (to obtain lot-specific concentration and expiration, please enter the lot number in our Certificate of Analysis online tool.)
Storage & Handling
Upon receipt, the antibody solution should be stored undiluted at -20°C, and protected from prolonged exposure to light.
Application

WB - Quality tested
Recommended Usage

Each lot of this antibody is quality control tested by Western blotting. For Western blotting, the suggested use of this reagent is 0.05 - 0.1 µg per ml (1:5000 - 1:10000 dilution). It is recommended that the reagent be titrated for optimal performance for each application.

25 µl and 100 µl of Direct-Blot™ HRP antibody can be used for approximately 5 and 20 Western blots, respectively, at the recommended concentration/dilution.

Application Notes

Additional reported applications (for the relevant formats) include: immunoprecipitation2,3.

The clone H14 was developed against a purified phosphorylated form of RNA polymerase II extracted from a transformed cell line. Pol II has two physiologically important phosphorylation sites: ser-2 and ser-5. Both sites are found in the heptapeptide repeat YSPTSPS at the C-terminal domain. Clone H14 recognizes the phosphoserine 5 (ser-5) of Pol II. Clone H14 is useful for immunofluorescence and Western blotting.

This clone is not recommended for ChIP (Chromatin Immunoprecipitation) assays (as determined by in-house testing).

Application References

(PubMed link indicates BioLegend citation)
  1. Brown JM, et al. 2008. J. Cell. Biol. 182:1083. (WB, IF)
  2. Bregman DB, et al. 1995. Cell Biol. 129:287-98. (IP)
  3. Ahn SH, et al. 2004. Mol. Cell. 13:67. (IP)
  4. Pellizzoni L, et al. 2001. Cell Biol. 152(1):75. (IF)
  5. Patturajan M, et al. 1998. J. Biol. Chem. 273(8):4689. (WB)
RRID
AB_2734688 (BioLegend Cat. No. 920305)
AB_2734688 (BioLegend Cat. No. 920306)

Antigen Details

Structure
RPB1 contains a C-terminus composed of heptapeptide repeats that are essential for polymerase activity. These repeats contain Ser and Thr residues that are phosphorylated in actively transcribing RNA polymerase. The predicted molecular weight is 220 kD.
Distribution

Nucleus and cytosol.

Function
RPB1 is the largest subunit of RNA polymerase II, the polymerase responsible for synthesizing messenger RNA in eukaryotes.
Biology Area
Cell Biology, Cell Cycle/DNA Replication, Transcription Factors
Molecular Family
Nuclear Markers
Gene ID
5430 View all products for this Gene ID
UniProt
View information about RNA Polymerase II RPB1 on UniProt.org

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Go To Top Version: 1    Revision Date: 05/17/2018

For Research Use Only. Not for diagnostic or therapeutic use.

 

This product is supplied subject to the terms and conditions, including the limited license, located at www.biolegend.com/terms) ("Terms") and may be used only as provided in the Terms. Without limiting the foregoing, BioLegend products may not be used for any Commercial Purpose as defined in the Terms, resold in any form, used in manufacturing, or reverse engineered, sequenced, or otherwise studied or used to learn its design or composition without express written approval of BioLegend. Regardless of the information given in this document, user is solely responsible for determining any license requirements necessary for user’s intended use and assumes all risk and liability arising from use of the product. BioLegend is not responsible for patent infringement or any other risks or liabilities whatsoever resulting from the use of its products.

 

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This data display is provided for general comparisons between formats.
Your actual data may vary due to variations in samples, target cells, instruments and their settings, staining conditions, and other factors.
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