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Home >> Antibodies >> FXN Antibody / Frataxin

FXN Antibody / Frataxin (FY13347)

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Image FY13347 Adding 0.2 ml of distilled water will yield a concentration of 500 ug/ml 100 ug 439
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Immunohistochemical staining of FXN using anti-FXN antibody. FXN was detected in a paraffin-embedded section of human ovarian cancer tissue. Heat mediated antigen retrieval was performed in EDTA buffer (pH 8.0, epitope retrieval solution). The tissue section was blocked with 10% goat serum. The tissue section was then incubated with 2 ug/ml rabbit anti-FXN antibody overnight at 4oC. Peroxidase Conjugated Goat Anti-rabbit IgG was used as secondary antibody and incubated for 30 minutes at 37oC. The tissue section was developed using an HRP secondary and DAB substrate.
Western blot analysis of FXN using anti-FXN antibody. Electrophoresis was performed on a 12% SDS-PAGE gel at 80V (Stacking gel) / 120V (Resolving gel) for 2 hours. Lane 1: human HepG2 whole cell lysates, Lane 2: human HEL whole cell lysates, Lane 3: human 293T whole cell lysates, Lane 4: human K562 whole cell lysates. After electrophoresis, proteins were transferred to a nitrocellulose membrane at 150 mA for 50-90 minutes. Blocked the membrane with 5% non-fat milk/TBS for 1.5 hour at RT. The membrane was incubated with rabbit anti-FXN antibody at 0.5 ug/ml overnight at 4oC, then washed with TBS-0.1%Tween 3 times with 5 minutes each and probed with a goat anti-rabbit IgG-HRP secondary antibody at a dilution of 1:5000 for 1.5 hour at RT. The signal was developed using an ECL Plus Western Blotting Substrate. Expected molecular weight: ~23 kDa (full length), ~14 kDa (mature).
Immunohistochemical staining of FXN using anti-FXN antibody. FXN was detected in a paraffin-embedded section of human pancreas cancer tissue. Heat mediated antigen retrieval was performed in EDTA buffer (pH 8.0, epitope retrieval solution). The tissue section was blocked with 10% goat serum. The tissue section was then incubated with 2 ug/ml rabbit anti-FXN antibody overnight at 4oC. Peroxidase Conjugated Goat Anti-rabbit IgG was used as secondary antibody and incubated for 30 minutes at 37oC. The tissue section was developed using an HRP secondary and DAB substrate.
Immunohistochemical staining of FXN using anti-FXN antibody. FXN was detected in a paraffin-embedded section of human pancreas cancer tissue. Heat mediated antigen retrieval was performed in EDTA buffer (pH 8.0, epitope retrieval solution). The tissue section was blocked with 10% goat serum. The tissue section was then incubated with 2 ug/ml rabbit anti-FXN antibody overnight at 4oC. Peroxidase Conjugated Goat Anti-rabbit IgG was used as secondary antibody and incubated for 30 minutes at 37oC. The tissue section was developed using an HRP secondary and DAB substrate.
Flow Cytometry analysis of HepG2 cells using anti-FXN antibody. Overlay histogram showing HepG2 cells stained with (Blue line). To facilitate intracellular staining, cells were fixed with 4% paraformaldehyde and permeabilized with permeabilization buffer. The cells were blocked with 10% normal goat serum. And then incubated with rabbit anti-FXN antibody (1 ug/million cells) for 30 min at 20oC. DyLight 488 conjugated goat anti-rabbit IgG (5-10 ug/million cells) was used as secondary antibody for 30 minutes at 20oC. Isotype control antibody (Green line) was rabbit IgG (1 ug/million cells) used under the same conditions. Unlabelled sample without incubation with primary antibody and secondary antibody (Red line) was used as a blank control.
Availability 1-2 days
Species Reactivity Human
Format Lyophilized
Clonality Polyclonal (rabbit origin)
Isotype Rabbit IgG
Purity Immunogen affinity purified
Buffer Each vial contains 4 mg Trehalose, 0.9 mg NaCl, 0.2 mg Na2HPO4.
UniProt Q16595
Localization Cytoplasm, Mitochondria
Applications Western Blot : 0.25-0.5ug/ml
Immunohistochemistry : 2-5ug/ml
Flow Cytometry : 1-3ug/million cells
ELISA : 0.1-0.5ug/ml
Limitations This FXN antibody is available for research use only.
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Description

FXN antibody detects Frataxin, a mitochondrial matrix protein encoded by the FXN gene on chromosome 9q21.11. Frataxin plays a fundamental role in iron-sulfur (Fe-S) cluster biogenesis, iron homeostasis, and oxidative stress protection. It is ubiquitously expressed but highly abundant in metabolically active tissues such as heart, skeletal muscle, pancreas, and neurons, where mitochondrial energy metabolism is critical. FXN belongs to the frataxin family of mitochondrial proteins and is essential for the proper function of enzymes involved in oxidative phosphorylation and the tricarboxylic acid (TCA) cycle.

FXN acts as an iron chaperone that delivers ferrous iron (Fe2+) to scaffold proteins such as ISCU for the assembly of Fe-S clusters. These clusters serve as cofactors for numerous mitochondrial enzymes, including aconitase and complex I-III components of the respiratory chain. By regulating mitochondrial iron utilization, FXN prevents toxic iron accumulation and the generation of reactive oxygen species (ROS). Co-localization studies demonstrate FXN interaction with ISCU and NFS1 within mitochondrial nucleoids, coordinating Fe-S cluster synthesis and incorporation into target proteins.

Structurally, Frataxin is a small alpha-beta fold protein with a conserved acidic ridge that binds iron ions. It belongs to the mitochondrial Fe-S cluster assembly machinery family. FXN also associates with chaperones and proteases such as HSP60 and Lon protease, maintaining protein stability and turnover in the mitochondrial matrix. It undergoes processing from a cytosolic precursor into a mature mitochondrial form via the mitochondrial targeting sequence at its N-terminus.

Functionally, FXN is crucial for cellular respiration, antioxidant defense, and metabolic balance. It supports the activity of Fe-S-dependent enzymes in the electron transport chain and modulates mitochondrial redox status. In neurons, FXN ensures energy supply and protects against oxidative stress, while in cardiac tissue, it maintains contractile efficiency by preserving mitochondrial integrity. Developmentally, FXN expression peaks during embryogenesis and early postnatal stages, coinciding with rapid mitochondrial biogenesis in growing tissues.

Loss-of-function mutations in FXN cause Friedreich's ataxia, an autosomal recessive neurodegenerative disease characterized by impaired motor coordination, cardiomyopathy, and diabetes. The deficiency leads to mitochondrial iron overload, defective Fe-S cluster assembly, and increased oxidative stress. Pathway involvement includes Fe-S cluster biosynthesis, oxidative phosphorylation, and cellular stress response. In cancer research, FXN downregulation is associated with altered metabolic reprogramming and mitochondrial dysfunction.

Immunohistochemical staining using FXN antibody shows mitochondrial localization in neurons, cardiac myocytes, and hepatocytes. The FXN antibody from NSJ Bioreagents is a reliable reagent for studying mitochondrial metabolism, iron homeostasis, and neurodegenerative disease mechanisms such as Friedreich's ataxia.

Application Notes

Optimal dilution of the FXN antibody should be determined by the researcher.

Immunogen

E.coli-derived human FXN recombinant protein (Position: Q20-A210) was used as the immunogen for the FXN antibody.

Storage

After reconstitution, the FXN antibody can be stored for up to one month at 4oC. For long-term, aliquot and store at -20oC. Avoid repeated freezing and thawing.

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