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Key Documents

Safety Information

04-1570-I

Sigma-Aldrich

Anti-RNA polymerase II subunit B1 (phospho-CTD Ser-7) Antibody, clone 4E12

culture supernatant, clone 4E12, from rat

Synonym(s):

DNA-directed RNA polymerase II subunit RPB1, RNA polymerase II subunit B1, DNA-directed RNA polymerase II subunit A, DNA-directed RNA polymerase III largest subunit, RNA-directed RNA polymerase II subunit RPB1

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About This Item

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

biological source

rat

Quality Level

100

antibody form

culture supernatant

antibody product type

primary antibodies

clone

4E12, 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

IgG1κ

NCBI accession no.

NP_000928

UniProt accession no.

P24928

shipped in

wet ice

target post-translational modification

phosphorylation (pSer7)

Gene Information

human ... POLR2B(5431)

General description

RPB1 (RNA polymerase II subunit B1) is the catalytic component of RNA polymerase II which synthesizes mRNA and non-coding RNAs. During transcription, elongation is influenced by the phosphorylation status of the C-terminal domain (CTD) of RPB1, which acts as an assembly platform for factors regulating transcription initiation, elongation, termination and mRNA processing. Phosphorylation occurs mainly at residues ′Ser-2′ and ′Ser-5′ of the tandem 7 residue repeats in the C-terminal domain (CTD), which activates Pol II. This phosphorylation also can occur at ′Ser-7′ of the heptapepdtide repeat. This antibody recognizes the ′Ser-7′ CTD residue of RPB1.

Specificity

Demonstrated to react with human RBP1 in Ni et al., 2011. Transcription 2:5, 237-242
This antibody recognizes RNA polymerase II subunit B1 phosphorylated at Ser7 of the C-terminal domain (CTD).

Immunogen

Epitope: Phosphorylated Ser7 of the C-terminal domain (CTD)
Ovalbumin-conjugated linear peptide corresponding to human RNA polymerase II subunit B1 phosphorylated at Ser7 of the C-terminal domain (CTD).

Application

Anti-RNA polymerase II subunit B1 (phospho-CTD Ser-7) Antibody, clone 4E12 is a highly specific rat monoclonal antibody & that targets RNA Polymerase & has been tested in western blotting.
Chromatin Immunoprecipitation Analysis: A representative lot was used by an independent laboratory to immunoprecipitate RNA polymerase II subunit B1 (phospho-CTD Ser-5) in ChIP (Chapman, R., et al. (2007). Science. 318(5857):1780-1782.).
Demonstrated to react with human RBP1 in Ni et al., 2011. Transcription 2:5, 237-242

Quality

Evaluated by Western Blotting in untreated and lambda phosphatase treated NIH/3T3 cell lysate.

Western Blotting Analysis: A 1:2,000 dilution from a representative lot detected RNA polymerase II subunit B1 (phospho-CTD Ser-7) in 10 μg of untreated NIH/3T3 cell lysate.

Target description

~220 kDa observed

Linkage

Replaces: 04-1570

Physical form

Rat monoclonal IgG1κ with 0.05% sodium azide.

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Storage Class Code

10 - Combustible liquids

WGK

WGK 1

Regulatory Listings

Regulatory Listings are mainly provided for chemical products. Only limited information can be provided here for non-chemical products. No entry means none of the components are listed. It is the user’s obligation to ensure the safe and legal use of the product.

JAN Code

04-1570-I:

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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Cyclin-dependent kinase 12 (CDK12) is an emerging therapeutic target due to its role in regulating transcription of DNA-damage response (DDR) genes. However, development of selective small molecules targeting CDK12 has been challenging due to the high degree of homology between
Rob D Chapman et al.
Science (New York, N.Y.), 318(5857), 1780-1782 (2007-12-15)
RNA polymerase II is distinguished by its large carboxyl-terminal repeat domain (CTD), composed of repeats of the consensus heptapeptide Tyr1-Ser2-Pro3-Thr4-Ser5-Pro6-Ser7. Differential phosphorylation of serine-2 and serine-5 at the 5' and 3' regions of genes appears to coordinate the localization of
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