Anti-Nibrin/Nbs1 Antibody, clone EE15 (Ascites Free)

Nibrin (UniProt O60934; also known as Cell cycle regulatory protein p95, Nijmegen breakage syndrome protein 1, p95 protein of the MRE11/RAD50 complex) is encoded by the NBN (also known as AT-V1, AT-V2, ATV, NBS, NBS1, P95) gene (Gene ID 4683) in human. Nibrin is a component of the MRN (MRE11/RAD50/NBN) complex involved in early steps of DNA double strand breaks (DSBs). The phosphorylation of H2AX pSer139 (γ-H2AX) found at the DNA-damaged sites, for example, is mediated by a direct interaction between Nibrin and the phosphorylated mediator of the DNA damage checkpoint 1 (MDC1). ATM, CtIP/RBBP8, Tip60, BRCA1, and SMC1 are also known interaction partners of Nibrin. Nibrin contains a fork-head associated (FHA) domain and two BRCA1 C-terminal (BRCT) tandem domains in its N-terminal region, followed by two MRE11-binding motifs and an ATM-binding motif in its C-terminal region. The Ser278 and Ser343 residues are known to be targeted for phosphorylation by ATM in response to ionizing-radiation (IR). NBN gene mutations are responsible for Nijmegen breakage syndrome (NBS), a disorder characterized by chromosomal instability, radiation sensitivity, microcephaly, growth retardation, immunodeficiency and predisposition to cancer.

~95 kDa observed.

Epitope: Amino acids 420-774.

GST fusion protein corresponding to residues 420-774 of human Nibrin/Nbs1.

Anti-Nibrin/Nbs1 Antibody, clone EE15 (Ascites Free) is an antibody against Nibrin/Nbs1 for use in Western Blotting, Immunocytochemistry, Immunoprecipitation.

Immunocytochemistry Analysis: 2.0 µg/mL from a representative lot detected Nibrin/Nbs1 in A431 cells.
Western Blotting Analysis: A representative lot detected a shift of Nbs apparent molecular weight in lysates from gamma-irradiated human cells (U2OS, IMR90, HEK293, BJAB) (Wu, X., et al. (2000). Nature. 405(6785):477-482).
Immunocytochemistry Analysis: A representative lot detected NBS1-positive nuclear foci by fluorescent immunocytochemistry (Wu, X., et al. (2000). Nature. 289(5476):11).
Immunoprecipitation Analysis: 4 μg of this antibody immunoprecipitated Nibrin/Nbs1 from 500 μg of Jurkat RIPA lysate.

Research Category
Epigenetics & Nuclear Function

Research Sub Category
Cell Cycle, DNA Replication & Repair

Recognizes Nibrin/Nbs1, Mr 95kDa. A non-specific protein was also detected at Mr 33kDa in some lysates, but not Jurkat cell lysate.

Protein G Purified

Format: Purified

Purified mouse monoclonal IgG1κ antibody in buffer containing 0.1 M Tris-Glycine (pH 7.4), 150 mM NaCl with 0.05% sodium azide.

Stable for 1 year at 2-8°C from date of receipt.

Evaluated by Western Blotting in HeLa cell lysate.

Western Blotting Analysis: 1.0 µg/mL of this antibody detected Nibrin/Nbs1 in 10 µg of HeLa cell lysate.

Concentration: Please refer to lot specific datasheet.

Replaces: 05-616

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