AB245432

Anti-Topoisomerase I antibody

Name: Anti-Topoisomerase I antibody (ab245432) | Abcam
Brand: Abcam Limited
SKU: AB245432

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(1 Publication)

Rabbit Polyclonal Topoisomerase I antibody. Suitable for IP, WB and reacts with Mouse, Human samples. Cited in 1 publication. Immunogen corresponding to Synthetic Peptide within Human TOP1 aa 700 to C-terminus.

View Alternative Names

DNA topoisomerase 1, DNA topoisomerase I, TOP1

3 Images

Supplier Data

Immunoprecipitation - Anti-Topoisomerase I antibody (AB245432)

Topoisomerase I was immunoprecipitated from HeLa (Human epithelial cell line from cervix adenocarcinoma) whole cell lysate (1 mg per IP reaction; 20% of IP loaded) prepared using NETN lysis buffer.

ab245432 used for IP at 6 μg per reaction. For WB 1 μg/ml.

Lane 1 : ab245432 (Lot 2) IP in HeLa whole cell lysate.

Lane 2 : ab245432 (Lot 3) IP in HeLa whole cell lysate.

Lane 3 : Control IgG in HeLa whole cell lysate.
Chemiluminescence detection : 3 minutes.

All lanes:

Immunoprecipitation - Anti-Topoisomerase I antibody (ab245432)

Predicted band size: 91 kDa

false

Supplier Data

Immunoprecipitation - Anti-Topoisomerase I antibody (AB245432)

Topoisomerase I was immunoprecipitated from NIH/3T3 (Mouse embryo fibroblast cell line) whole cell lysate (1 mg per IP reaction; 20% of IP loaded) prepared using NETN lysis buffer.

ab245432 used for WB 0.1 μg/ml.

Chemiluminescence detection : 30 seconds.

All lanes:

Immunoprecipitation - Anti-Topoisomerase I antibody (ab245432)

Predicted band size: 91 kDa

false

Supplier Data

Western blot - Anti-Topoisomerase I antibody (AB245432)

Prepared using NETN lysis buffer.

All lanes:

Western blot - Anti-Topoisomerase I antibody (ab245432) at 0.1 µg/mL

Lane 1:

HeLa (Human epithelial cell line from cervix adenocarcinoma) whole cell lysate at 50 µg

Lane 2:

HeLa whole cell lysate at 15 µg

Lane 3:

HeLa whole cell lysate at 5 µg

Lane 4:

HEK-293T (Human epithelial cell line from embryonic kidney transformed with large T antigen) whole cell lysate at 50 µg

Lane 5:

Jurkat (Human T cell leukemia cell line from peripheral blood) whole cell lysate at 50 µg

Predicted band size: 91 kDa

false

Exposure time: 30s

Key facts

Host species

Rabbit

Clonality

Polyclonal

Isotype

IgG

Carrier free

Reacts with

Mouse, Human

Applications

WB, IP

applications

Immunogen

Synthetic Peptide within Human TOP1 aa 700 to C-terminus. The exact immunogen used to generate this antibody is proprietary information.

P11387

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Reactivity data

{ "title": "Reactivity Data", "filters": { "stats": ["", "Species", "Dilution Info", "Notes"], "tabs": { "all-applications": {"fullname" : "All Applications", "shortname": "All Applications"}, "IP" : {"fullname" : "Immunoprecipitation", "shortname":"IP"}, "WB" : {"fullname" : "Western blot", "shortname":"WB"} }, "product-promise": { "all": "all", "testedAndGuaranteed": "tested", "guaranteed": "expected", "predicted": "predicted", "notRecommended": "not-recommended" } }, "values": { "Human": { "IP-species-checked": "testedAndGuaranteed", "IP-species-dilution-info": "2-10 µg/mg of lysate", "IP-species-notes": "", "WB-species-checked": "testedAndGuaranteed", "WB-species-dilution-info": "1/2000 - 1/10000", "WB-species-notes": "" }, "Mouse": { "IP-species-checked": "testedAndGuaranteed", "IP-species-dilution-info": "2-10 µg/mg of lysate", "IP-species-notes": "", "WB-species-checked": "guaranteed", "WB-species-dilution-info": "", "WB-species-notes": "" } } }

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Properties and storage information

Form

Liquid

Purification technique

Affinity purification Immunogen

Purification notes

ab245432 was affinity purified using an epitope specific to Topoisomerase I immobilized on solid support.

Storage buffer

pH: 7 - 8 Preservative: 0.09% Sodium azide Constituents: Tris citrate/phosphate

Shipped at conditions

Blue Ice

Appropriate short-term storage duration

1-2 weeks

Appropriate short-term storage conditions

+4°C

Appropriate long-term storage conditions

+4°C

Aliquoting information

Upon delivery aliquot

Storage information

Avoid freeze / thaw cycle

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Supplementary information

This supplementary information is collated from multiple sources and compiled automatically.

Topoisomerase I also known as DNA topoisomerase I or Topo I is an important enzyme in the unwinding of the DNA double helix during processes such as replication and transcription. This enzyme has a molecular mass of approximately 91 kDa and functions by creating transient single-strand breaks in the DNA allowing relaxation of supercoils. Topoisomerase I is widely expressed in both proliferating and non-proliferating cells with higher levels seen in tissues with rapid cell division like the gastrointestinal tract and some immune cells.

Biological function summary

Topoisomerase I plays a significant role in the modulation of DNA topology ensuring proper chromosomal functions during cellular proliferation. It serves as a single polypeptide and does not require a companion for its activity unlike other topoisomerases that may function in complexes. The enzyme’s ability to relieve torsional stress in DNA is essential for maintaining genomic stability and facilitating the smooth progression of the replication fork.

Pathways

Topoisomerase I is vital for DNA replication and transcription processes. It works in concert with other proteins such as helicases and ligases to ensure efficient unwinding and rewinding of DNA strands. The enzyme participates in the DNA damage response pathway where it interacts with proteins like PARP1 to coordinate repair processes. Its action is important in both the S phase of the cell cycle where DNA synthesis occurs and in the G0 phase where cells are in a quiescent state.

Topoisomerase I is heavily implicated in oncogenesis with significant associations to colorectal and ovarian cancers. Its heightened activity can lead to genomic instability a hallmark of cancer development. The enzyme also relates to chemotherapeutic resistance where mutations in topoisomerase I lead to reduced drug efficacy. Furthermore inhibitors targeting topoisomerase I such as camptothecin-based drugs exploit its role in cancer aiming to induce DNA damage selectively in rapidly dividing cells. Connections to other proteins like BRCA1 are apparent in these pathways as they both contribute to the DNA repair processes in cells.

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Product protocols

For this product, it's our understanding that no specific protocols are required. You can visit:

Visit the General protocols
Visit the Troubleshooting

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Target data

Releases the supercoiling and torsional tension of DNA introduced during the DNA replication and transcription by transiently cleaving and rejoining one strand of the DNA duplex. Introduces a single-strand break via transesterification at a target site in duplex DNA. The scissile phosphodiester is attacked by the catalytic tyrosine of the enzyme, resulting in the formation of a DNA-(3'-phosphotyrosyl)-enzyme intermediate and the expulsion of a 5'-OH DNA strand. The free DNA strand then rotates around the intact phosphodiester bond on the opposing strand, thus removing DNA supercoils. Finally, in the religation step, the DNA 5'-OH attacks the covalent intermediate to expel the active-site tyrosine and restore the DNA phosphodiester backbone (By similarity). Regulates the alternative splicing of tissue factor (F3) pre-mRNA in endothelial cells. Involved in the circadian transcription of the core circadian clock component BMAL1 by altering the chromatin structure around the ROR response elements (ROREs) on the BMAL1 promoter.

See full target information TOP1

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Publications (1)

Recent publications for all applications. Explore the full list and refine your search

Cancer management and research 13:2057-2069 PubMed33664593

2021

Sevoflurane Limits Glioma Progression by Regulating Cell Proliferation, Apoptosis, Migration, and Invasion via miR-218-5p/DEK/β-Catenin Axis in Glioma.

Applications

Unspecified application

Species

Unspecified reactive species

Yingying Qi,Lina Guo,Yanchao Liu,Tonghang Zhao,Xianwen Liu,Yang Zhang

View all publications

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Product promise

We are committed to supporting your work with high-quality reagents, and we're here for you every step of the way. In the unlikely event that one of our products does not perform as expected, you're protected by our Product Promise.

For full details, please see our Terms & Conditions

Please note: All products are 'FOR RESEARCH USE ONLY. NOT FOR USE IN DIAGNOSTIC OR THERAPEUTIC PROCEDURES'.

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Anti-Topoisomerase I antibody

Immunoprecipitation - Anti-Topoisomerase I antibody (AB245432)

Immunoprecipitation - Anti-Topoisomerase I antibody (AB245432)

Western blot - Anti-Topoisomerase I antibody (AB245432)

Key facts

Host species

Clonality

Isotype

Carrier free

Reacts with

Applications

Immunogen

Reactivity data

Properties and storage information

Form

Purification technique

Purification notes

Storage buffer

Shipped at conditions

Appropriate short-term storage duration

Appropriate short-term storage conditions

Appropriate long-term storage conditions

Aliquoting information

Storage information

Supplementary information

Biological function summary

Pathways

Product protocols

Target data

Publications (1)

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