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SAB4200638

Sigma-Aldrich

Monoclonal Anti−phospho−RNA polymerase II CTD (pSer5) antibody produced in rat

clone 1H4B6, purified from hybridoma cell culture

Synonym(s):

CCFDN, CTD (carboxy−terminal domain, RNA polymerase II, polypeptide A) phosphatase, CTD of POLR2A, FCP1, POLR2, POLRA, RNA polymerase II subunit A C-terminal domain phosphatase, RPB1, RPBh1, RPO2, RPOL2, RpIILS, TFIIF-associating CTD phosphatase 1, hRPB221, hsRPB1, phosphatase of, subunit 1, polymerase (RNA) II (DNA directed) polypeptide A 220kDa (POLR2A), serine phosphatase FCP1a, subunit 1CTDP1, transcription factor IIF-associating CTD phosphatase 1

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About This Item

UNSPSC Code:
12352203
NACRES:
NA.41

biological source

rat

Quality Level

antibody form

purified from hybridoma cell culture

antibody product type

primary antibodies

clone

1H4B6, monoclonal

mol wt

~250 kDa

species reactivity

human, rat, mouse, monkey, canine

concentration

~1 mg/mL

technique(s)

immunoblotting: 0.5-1 μg/mL using whole extracts of HeLa cells.
immunofluorescence: 4-8 μg/mL using using HeLa cells.

isotype

IgG2b

UniProt accession no.

shipped in

dry ice

storage temp.

−20°C

target post-translational modification

phosphorylation (pSer5)

Gene Information

human ... POLR2A(5430)
mouse ... Polr2a(20020)
rat ... Polr2a(363633)

General description

Monoclonal Anti-phospho-RNA polymerase II CTD (pSer5) (rat IgG2b isotype) is derived from the hybridoma 1H4B6 produced by the fusion of mouse myeloma cells and lymph node cells from rat immunized with Synthetic peptide.. The C-terminal domain (CTD) RNAPII also known as POLR2A is the largest subunit of RNA polymerase II. It comprises the heptapeptide repeats with serine and threonine residues in the C-terminal. POLR2A gene is mapped to human chromosome 17p13.1.

Specificity

Monoclonal Anti-phospho-RNA polymerase II CTD (pSer5) recognizes specifically phosphor-Ser5 RNAPII but not phospho-Ser2 or phospho-Ser7.

Immunogen

Synthetic peptide corresponding to pSer5 of human RNA Polymerase II CTD repeat.

Application

Monoclonal Anti−phospho−RNA polymerase II CTD (pSer5) antibody produced in rat may be used in immunoblotting and immunofluorescence.

Biochem/physiol Actions

The C-terminal domain (CTD) of the RNA polymerase II is essential for polymerase activity and gene regulation.. The CTD functions to help couple transcription and processing of the nascent RNA and also plays roles in transcription elongation and termination. In addition, this subunit, in combination with several other polymerase subunits, forms the DNA binding domain of the polymerase, a groove in which the DNA template is transcribed into RNA. CTD is being dynamically modified during transcription cycle and the Ser 5 phosphorylation in promoter region is more prominent than the 3′ region. The phosphorylation at Ser5 and Ser7 is mediated by the cyclin dependent kinase 7 of the transcription factor II human (TFIIH). The recruitment of the capping machinery is the main function of phosphor-Ser5. However, other protein interactions require the phosphor-Ser5 as well. Mutation in the domain regions of POLR2A is implicated in developmental delay and in neurodevelopmental syndrome.

Physical form

Solution in 0.01 M phosphate buffered saline, pH 7.4, containing 15 mM sodium azide.

Storage and Stability

For extended storage, freeze at -20 °C in working aliquots. Repeated freezing and thawing or storage in “frost-free” freezers is not recommended. If slight turbidity occurs upon prolonged storage, clarify the solution by centrifugation before use. Working dilution samples should be discarded if not used within 12 hours.

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

10 - 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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HDP101, a novel B-cell maturation antigen (BCMA)-targeted antibody conjugated to alpha-Amanitin, is active against myeloma with preferential efficacy against pre-clinical models of deletion 17p
Singh RK, et al.
Blood, 132, 593-593 (2018)
Dynamic phosphorylation patterns of RNA polymerase II CTD during transcription
Heidemann M, et al.
Biochimica et Biophysica Acta - Gene Regulatory Mechanisms, 1829(1), 55-62 (2013)
De Novo Heterozygous POLR2A Variants Cause a Neurodevelopmental Syndrome with Profound Infantile-Onset Hypotonia
Haijes HA, et al.
American Journal of Human Genetics, 105(2), 283-301 (2019)
Jing-Ping Hsin et al.
Genes & development, 26(19), 2119-2137 (2012-10-03)
The C-terminal domain (CTD) of the RNA polymerase II largest subunit consists of multiple heptad repeats (consensus Tyr1-Ser2-Pro3-Thr4-Ser5-Pro6-Ser7), varying in number from 26 in yeast to 52 in vertebrates. The CTD functions to help couple transcription and processing of the

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