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04-1572

Sigma-Aldrich

Anti-RNA polymerase II subunit B1 (phospho-CTD Ser-5) Antibody, clone 3E8

clone 3E8, from rat

Synonym(s):

DNA-directed RNA polymerase II A, DNA-directed RNA polymerase II largest subunit, RNA polymerase II 220 kd subunit, DNA-directed RNA polymerase II subunit A, DNA-directed RNA polymerase III largest subunit, RNA polymerase II subunit B1, RNA-directed RNA

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About This Item

UNSPSC Code:
12352203
eCl@ss:
32160702
NACRES:
NA.41

biological source

rat

Quality Level

antibody form

purified immunoglobulin

antibody product type

primary antibodies

clone

3E8, monoclonal

species reactivity

mouse

species reactivity (predicted by homology)

human (based on 100% sequence homology)

technique(s)

ChIP: suitable
ELISA: suitable
western blot: suitable

isotype

IgG2aκ

NCBI accession no.

UniProt accession no.

shipped in

wet ice

target post-translational modification

phosphorylation (pSer5)

Gene Information

human ... POLR2B(5431)

General description

RNA polymerase II subunit B1 (RPB1) is the largest subunit of the RNA polymerase II complex. As a holoenzyme RNA polymerase II catalyzes transcription of eukaryotic DNA into RNA using the four ribonucleoside triphosphates as substrates. The RBP1 subunit, in combination with other polymerase subunits, forms a large central cleft that maintains contact between the active site of the enzyme, the DNA template, and the nascent RNA transcript. This subunit also contains a carboxy terminal domain (CTD) consisting of tandem heptapeptide repeats. Phosphorylation activates the RNA polymerase II beta subunit, allowing it to serve as an assembly platform for additional subunits that modulate initiation, elongation, termination and mRNA processing. In actively transcribing RNA polymerase ‘Ser-2’ and ‘Ser-5’ of the heptapeptide repeat are phosphorylated. Ser-7 is phosphorylated before initiation of transcription at promoter regions.

Specificity

This antibody recognizes RNA polymerase II subunit B1 at the CTD when phosphorylated at Ser5.

Immunogen

Epitope: Ser5
Ovalbumin-conjugated linear peptide corrresponding to human RNA polymerase subunit B1 CTD phosphorylated at Ser5.

Application

Chromatin Immunoprecipitation Analysis: A representative lot was used by an independent laboratory in ChIP. (Chapman, R., et al. (2007). Science. 318(5857):1780 -1782.)
Research Category
Epigenetics & Nuclear Function

Epigenetics & Nuclear Function
Research Sub Category
Transcription Factors

RNA Metabolism & Binding Proteins
Use Anti-RNA polymerase II subunit B1 (phospho-CTD Ser-5) Antibody, clone 3E8 (Rat Monoclonal Antibody) validated in WB, ELISA, ChIP to detect RNA polymerase II subunit B1 (phospho-CTD Ser-5).

Quality

Evaluated by Western Blot in γ-PPase untreated and treated NIH/3T3 cell lysates.

Western Blot Analysis: 1 µg/ml of this antibody detected RNA polymerase II CTD on 10 µg of γ-PPase untreated and treated NIH/3T3 cell lysates.

Target description

~ 220 kDa

Physical form

Format: Purified
Protein G Purified
Purified rat monoclonal IgG2aκ in buffer containing 0.1 M Tris-Glycine (pH 7.4), 150 mM NaCl with 0.05% sodium azide.

Storage and Stability

Stable for 1 year at 2-8°C from date of receipt.

Analysis Note

Control
γ-protein phosphatase (γ-Ppase) untreated and treated NIH/3T3 cell lysates

Other Notes

Concentration: Please refer to the Certificate of Analysis for the lot-specific concentration.

Disclaimer

Unless otherwise stated in our catalog or other company documentation accompanying the product(s), our products are intended for research use only and are not to be used for any other purpose, which includes but is not limited to, unauthorized commercial uses, in vitro diagnostic uses, ex vivo or in vivo therapeutic uses or any type of consumption or application to humans or animals.

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Storage Class Code

12 - Non Combustible Liquids

WGK

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable


Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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Yejun Wang et al.
Scientific reports, 7, 42422-42422 (2017-02-12)
Co-expression of a specific group of genes requires physical associations among these genes, which form functional chromosomal contacts. While DNA fluorescence in situ hybridization (FISH) pinpoints the localization of genes within the 3D nuclear architecture, direct evidence of physical chromosomal
Jean Mbogning et al.
Nucleic acids research, 43(20), 9766-9775 (2015-08-16)
Transcription by RNA polymerase II (RNAPII) is accompanied by a conserved pattern of histone modifications that plays important roles in regulating gene expression. The establishment of this pattern requires phosphorylation of both Rpb1 (the largest RNAPII subunit) and the elongation
Lyne Khair et al.
PLoS genetics, 11(8), e1005438-e1005438 (2015-08-12)
Activation-induced cytidine deaminase (AID) is required for initiation of Ig class switch recombination (CSR) and somatic hypermutation (SHM) of antibody genes during immune responses. AID has also been shown to induce chromosomal translocations, mutations, and DNA double-strand breaks (DSBs) involving
Mitsunori Koga et al.
Nucleic acids research, 43(17), 8258-8267 (2015-07-24)
Phosphorylation of the C-terminal domain of the largest subunit of RNA polymerase II (Pol II), especially Ser2 and Ser5 residues, plays important roles in transcription and mRNA processing, including 5' end capping, splicing and 3' end processing. These phosphorylation events
Kaiwei Liang et al.
Molecular and cellular biology, 35(6), 928-938 (2015-01-07)
Cyclin-dependent kinase 9 (CDK9) and CDK12 have each been demonstrated to phosphorylate the RNA polymerase II C-terminal domain (CTD) at serine 2 of the heptad repeat, both in vitro and in vivo. CDK9, as part of P-TEFb and the super

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