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Sigma-Aldrich

Rabbit anti-Phospho RPA32 (S4/S8) Antibody, Affinity Purified

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Synonym(s):

32kDa, REPA2, RF-A protein 2, RP-A p32, RP-A p34, RPA32, replication factor A protein 2, replication protein A 34 kDa subunit, replication protein A2, replication protein A2 (32kD)

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About This Item

UNSPSC Code:
12352203
NACRES:
NA.41

biological source

rabbit

Quality Level

100

antibody form

affinity purified immunoglobulin

antibody product type

primary antibodies

grade

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species reactivity

human, mouse

technique(s)

immunocytochemistry: 1:500-1:5,000
immunohistochemistry: 1:500-1:2,000
immunoprecipitation (IP): 2-10 μg/mg
western blot: 1:2,000-1:10,000

accession no.

NP_002937.1

shipped in

wet ice

storage temp.

2-8°C

target post-translational modification

phosphorylation (pSer4/pSer8)

Gene Information

human ... RPA2(6118)

General description

Replication protein A2 (RPA32) is encoded by the gene mapped to human chromosome 1p35.3. It is a subunit of the heterotrimeric replication protein A (RPA) complex.

Immunogen

Immunogen was a dually phosphorylated synthetic peptide, which represented a portion of human replication protein A2, 32 kDa surrounding phosphorylated serines that corresponded to positions 4 and 8 using the numbering given in entry NP_002937.1 (GeneID 6118).

Biochem/physiol Actions

Replication Protein A (RPA) binds single-stranded DNA and plays a vital role in DNA replication, DNA repair, and checkpoint signaling. Phosphorylation of replication protein A2 (RPA32) by ataxia telangiectasia and Rad3-related protein kinase (ATR) and DNA-dependent protein kinase (DNA-PK) causes checkpoint kinase 1 (Chk1) activation and replication arrest. DNA-PK and ATR signaling via RPA32 (S4/S8) enhances genome stability and cell survival following replication stress.

Physical form

Tris-citrate/phosphate buffer, pH 7 to 8 containing 0.09% Sodium Azide

Other Notes

Replication protein A (RPA) is a multisubunit complex that carries out DNA mismatch repair (MMR) in association with MSH2 (a subunit of human MutS heterodimers), MLH1 (a subunit of human MutL heterodimers), PCNA, and DNA polymerase-delta. RPA is composed of a heterotrimer that includes subunits of 70 kDa (RPA1), 32kDa (RPA2), and 14kDa (RPA3). RPA2, the 32kDa subunit, is phosphorylated by the cdc2 family of kinases when cells enter S-phase and in response to DNA damage by ATM, ATR, and DNA-PK.

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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Certificates of Analysis (COA)

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Radka Storchova et al.
The FEBS journal, 288(20), 6035-6051 (2021-05-14)
Upon exposure to genotoxic stress, cells activate DNA damage response (DDR) that coordinates DNA repair with a temporal arrest in the cell cycle progression. DDR is triggered by activation of ataxia telangiectasia mutated/ataxia telangiectasia and Rad3-related protein kinases that phosphorylate
DNA-PK phosphorylation of RPA32 Ser4/Ser8 regulates replication stress checkpoint activation, fork restart, homologous recombination and mitotic catastrophe
Ashley AK, et al.
DNA Repair, 21(3), 131-139 (2014)

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