AB316746

Anti-TopBP1 (phospho S1138) antibody [EPR27056-2]

20ul selling size
Recombinant
RabMAb
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Rabbit Recombinant Monoclonal TopBP1 phospho S1138 antibody. Suitable for WB, Dot and reacts with Transfected cell lysate - Human, Human, Synthetic peptide - Human samples.

View Alternative Names

KIAA0259, TOPBP1, DNA topoisomerase 2-binding protein 1, DNA topoisomerase II-beta-binding protein 1, DNA topoisomerase II-binding protein 1, TopBP1

3 Images

Supplier Data

Western blot - Anti-TopBP1 (phospho S1138) antibody [EPR27056-2] (AB316746)

The expression of TOPBP1 S1138 is upregulated in response to hydroxyurea treatment (PMID : 17446169).

Lysates were freshly made and used for Western blotting immediately to minimize protein degradation.

In Western blot, Anti-Histone H3 antibody [EPR16987] - Nuclear Marker and ChIP Grade (ab176842) staining at 1/100000 dilution.

In Western blot, Anti-TOPBP1 antibody staining at 1/1000 dilution.

All lanes:

Western blot - Anti-TopBP1 (phospho S1138) antibody [EPR27056-2] (ab316746) at 1/1000 dilution

Lane 1:

Untreated U-2 OS (human bone osteosarcoma epithelial cell) whole cell lysate (untreated membrane) at 30 µg

Lane 2:

U-2 OS treated with 2mM hydroxyurea for 24h whole cell lysate (untreated membrane) at 30 µg

Lane 3:

U-2 OS treated with 2mM hydroxyurea for 24h whole cell lysate (alkaline phosphatase treated membrane) at 30 µg

Secondary

All lanes:

Western blot - Goat Anti-Rabbit IgG H&L (HRP) (<a href='/en-us/products/secondary-antibodies/goat-rabbit-igg-h-l-hrp-ab97051'>ab97051</a>) at 1/20000 dilution

Observed band size: 170 kDa,15 kDa

false

Exposure time: 92s

Supplier Data

Western blot - Anti-TopBP1 (phospho S1138) antibody [EPR27056-2] (AB316746)

Lysates were freshly made and used for Western blotting immediately to minimize protein degradation.

In Western blot, Anti-Vinculin antibody [EPR8185] (ab129002) staining at 1/10000 dilution.

In Western blot, Anti-6X His tag antibody [EPR20547]-CHIP Grade (ab213204) staining at 1/5000 dilution.

All lanes:

Western blot - Anti-TopBP1 (phospho S1138) antibody [EPR27056-2] (ab316746) at 1/1000 dilution

Lane 1:

Untreated 293T cells transfected with a human TOPBP1 (S1138A) expression vector containing a His-tag, whole cell lysate at 20 µg

Lane 2:

293T cells transfected with a human TOPBP1 (S1138A) expression vector containing a His-tag, treated with 100nM Calyculin A for 30 min whole cell lysate at 20 µg

Lane 3:

Untreated 293T cells transfected with a human wild-type TOPBP1 expression vector containing a His-tag, whole cell lysate at 20 µg

Lane 4:

293T cells transfected with a human wild-type TOPBP1 expression vector containing a His-tag, treated with 100nM Calyculin A for 30 min whole cell lysate at 20 µg

Secondary

All lanes:

Western blot - Goat Anti-Rabbit IgG H&L (HRP) (<a href='/en-us/products/secondary-antibodies/goat-rabbit-igg-h-l-hrp-ab97051'>ab97051</a>) at 1/100000 dilution

Observed band size: 55 kDa,75 kDa,170 kDa,124 kDa,50 kDa

false

Exposure time: 10s

Supplier Data

Dot Blot - Anti-TopBP1 (phospho S1138) antibody [EPR27056-2] (AB316746)

Dot blot analysis of TopBP1 (phospho S1138) using ab316746 at 1 : 1000 (0.53 ug/ml) followed by a Goat Anti-Rabbit IgG, (H+L), Peroxidase conjugated (ab97051) at 1 : 100,000 dilution.

Blocking and diluting buffer and concentration : 5% NFDM/TBST.

All lanes:

Dot Blot - Anti-TopBP1 (phospho S1138) antibody [EPR27056-2] (ab316746) at 1/1000 dilution

Lane 1:

TopBP1 (Phospho S1138) peptide a

Lane 2:

TopBP1 (Phospho S1138) peptide b

Lane 3:

TopBP1 non-phospho peptide

Secondary

All lanes:

Dot Blot - Goat Anti-Rabbit IgG H&L (HRP) (<a href='/en-us/products/secondary-antibodies/goat-rabbit-igg-h-l-hrp-ab97051'>ab97051</a>) at 1/100000 dilution

false

Exposure time: 180s

Carrier free

Anti-TopBP1 (phospho S1138) antibody [EPR27056-2] - BSA and Azide free

Key facts

Host species

Rabbit

Clonality

Monoclonal

Clone number

EPR27056-2

Isotype

IgG

Carrier free

Reacts with

Human

Applications

Dot, WB

applications

Immunogen

The exact immunogen used to generate this antibody is proprietary information.

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Reactivity data

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Product details

Patented technology
Our RabMAb^® technology is a patented hybridoma-based technology for making rabbit monoclonal antibodies. For details on our patents, please refer to RabMAb^® patents.

What are the advantages of a recombinant monoclonal antibody?
This product is a recombinant monoclonal antibody, which offers several advantages including:

- High batch-to-batch consistency and reproducibility
- Improved sensitivity and specificity
- Long-term security of supply
- Animal-free batch production

For more information, read more on recombinant antibodies.

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Properties and storage information

Form

Liquid

Purification technique

Affinity purification Protein A

Storage buffer

pH: 7.2 - 7.4 Preservative: 0.01% Sodium azide Constituents: PBS, 40% Glycerol (glycerin, glycerine), 0.05% BSA

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

-20°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.

TopBP1 also known as Topoisomerase II Binding Protein 1 is an important regulator in DNA replication and repair processes. This protein has an approximate mass of 180 kDa. It is expressed in various tissues with significant levels in rapidly dividing cells. TopBP1 functions mechanically by interacting with components of the DNA damage response machinery. It binds to double-strand breaks and activates ATR (Ataxia Telangiectasia and Rad3-related protein) signaling which is essential for maintaining genome stability under stress conditions.

Biological function summary

The activities of TopBP1 involve coordination of replication checkpoints and safeguarding the integrity of the replication fork. TopBP1 operates as part of a larger protein complex that senses DNA damage and initiates repair processes. It facilitates the recruitment of other repair proteins to sites of damage ensuring that replication proceeds only when the DNA is adequately repaired. It functions closely with proteins like RAD9 RAD1 and HUS1 which sense DNA damage and engage repair pathways.

Pathways

TopBP1 plays an important role in the DNA damage response and cell cycle regulation pathways. The protein is primarily involved in the ATR-Chk1 pathway and plays a significant role in the replication stress response. Within these pathways TopBP1 associates with proteins like ATR and Chk1 to coordinate cell cycle arrest and DNA repair linking replication and repair functions to maintain cell stability. It also interacts with the MRN complex (MRE11 RAD50 and NBS1) which is critical for responding to double-strand breaks.

The malfunction of TopBP1 has implications for cancer development and progression. Deficiencies or mutations in TopBP1 may result in impaired DNA repair leading to genome instability a condition frequently observed in cancerous cells. TopBP1 interacts with other tumor suppressors such as p53 to regulate cell cycle checkpoints and prevent the accumulation of mutations. Aberrations in TopBP1 function can also contribute to the pathology of developmental disorders as its interactions with proteins involved in genome maintenance are important for normal cellular function.

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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

Scaffold protein that acts as a key protein-protein adapter in DNA replication and DNA repair (PubMed : 10498869, PubMed : 11395493, PubMed : 11714696, PubMed : 17575048, PubMed : 20545769, PubMed : 21777809, PubMed : 26811421, PubMed : 30898438, PubMed : 31135337, PubMed : 33592542, PubMed : 35597237, PubMed : 37674080). Composed of multiple BRCT domains, which specifically recognize and bind phosphorylated proteins, bringing proteins together into functional combinations (PubMed : 17575048, PubMed : 20545769, PubMed : 21777809, PubMed : 26811421, PubMed : 30898438, PubMed : 31135337, PubMed : 35597237, PubMed : 37674080). Required for DNA replication initiation but not for the formation of pre-replicative complexes or the elongation stages (By similarity). Necessary for the loading of replication factors onto chromatin, including GMNC, CDC45, DNA polymerases and components of the GINS complex (By similarity). Plays a central role in DNA repair by bridging proteins and promoting recruitment of proteins to DNA damage sites (PubMed : 30898438, PubMed : 35597237, PubMed : 37674080). Involved in double-strand break (DSB) repair via homologous recombination in S-phase by promoting the exchange between the DNA replication factor A (RPA) complex and RAD51 (PubMed : 26811421, PubMed : 35597237). Mechanistically, TOPBP1 is recruited to DNA damage sites in S-phase via interaction with phosphorylated HTATSF1, and promotes the loading of RAD51, thereby facilitating RAD51 nucleofilaments formation and RPA displacement, followed by homologous recombination (PubMed : 35597237). Involved in microhomology-mediated end-joining (MMEJ) DNA repair by promoting recruitment of polymerase theta (POLQ) to DNA damage sites during mitosis (PubMed : 37674080). MMEJ is an alternative non-homologous end-joining (NHEJ) machinery that takes place during mitosis to repair DSBs in DNA that originate in S-phase (PubMed : 37674080). Recognizes and binds POLQ phosphorylated by PLK1, enabling its recruitment to DSBs for subsequent repair (PubMed : 37674080). Involved in G1 DNA damage checkpoint by acting as a molecular adapter that couples TP53BP1 and the 9-1-1 complex (PubMed : 31135337). In response to DNA damage, triggers the recruitment of checkpoint signaling proteins on chromatin, which activate the CHEK1 signaling pathway and block S-phase progression (PubMed : 16530042, PubMed : 21777809). Acts as an activator of the kinase activity of ATR (PubMed : 16530042, PubMed : 21777809). Also required for chromosomal stability when DSBs occur during mitosis by forming filamentous assemblies that bridge MDC1 and tether broken chromosomes during mitosis (PubMed : 30898438). Together with CIP2A, plays an essential role in the response to genome instability generated by the presence of acentric chromosome fragments derived from shattered chromosomes within micronuclei (PubMed : 35121901, PubMed : 35842428, PubMed : 37165191, PubMed : 37316668). Micronuclei, which are frequently found in cancer cells, consist of chromatin surrounded by their own nuclear membrane : following breakdown of the micronuclear envelope, a process associated with chromothripsis, the CIP2A-TOPBP1 complex tethers chromosome fragments during mitosis to ensure clustered segregation of the fragments to a single daughter cell nucleus, facilitating re-ligation with limited chromosome scattering and loss (PubMed : 37165191, PubMed : 37316668). Recruits the SWI/SNF chromatin remodeling complex to E2F1-responsive promoters, thereby down-regulating E2F1 activity and inhibiting E2F1-dependent apoptosis during G1/S transition and after DNA damage (PubMed : 12697828, PubMed : 15075294).

See full target information TOPBP1 phospho S1138

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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'.

For licensing inquiries, please contact partnerships@abcam.com

Anti-TopBP1 (phospho S1138) antibody [EPR27056-2]

Western blot - Anti-TopBP1 (phospho S1138) antibody [EPR27056-2] (AB316746)

Western blot - Anti-TopBP1 (phospho S1138) antibody [EPR27056-2] (AB316746)

Dot Blot - Anti-TopBP1 (phospho S1138) antibody [EPR27056-2] (AB316746)

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Key facts

Host species

Clonality

Clone number

Isotype

Carrier free

Reacts with

Applications

Immunogen

Reactivity data

Product details

Properties and storage information

Form

Purification technique

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

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Primary Antibodies

Primary Antibodies

Primary Antibodies

Primary Antibodies

Product promise