Revision 1

#64668Store at -20C

Cell Signaling Technology

Orders: 877-616-CELL (2355) [email protected]

Support: 877-678-TECH (8324)

Web: [email protected] cellsignal.com

3 Trask LaneDanversMassachusetts01923USA
For Research Use Only. Not for Use in Diagnostic Procedures.
Applications:

WB, IHC-P

REACTIVITY:

H M

SENSITIVITY:

Endogenous

MW (kDa):

Full-length 23 - Intermediate 17 - Mature 14

Source/Isotype:

Rabbit IgG

UniProt ID:

#Q16595

Entrez-Gene Id:

2395

Product Information

Product Usage Information

Application Dilution
Western Blotting 1:1000
Immunohistochemistry (Paraffin) 1:800 - 1:3200

Storage

Supplied in 10 mM sodium HEPES (pH 7.5), 150 mM NaCl, 100 µg/mL BSA, 50% glycerol, and less than 0.02% sodium azide. Store at –20°C. Do not aliquot the antibody.

Specificity / Sensitivity

Frataxin (F4V2S) Rabbit mAb recognizes endogenous levels of total frataxin protein. Species cross-reactivity for IHC-P is human only.

Species Reactivity:

Human, Mouse

Source / Purification

Monoclonal antibody is produced by immunizing animals with recombinant protein specific to the carboxy terminus of human frataxin protein.

Background

Frataxin is a highly conserved, ubiquitously expressed mitochondrial protein implicated in iron-sulfide cluster (ISC) assembly and iron homeostasis. Synthesized as a cytosolic 210 amino acid precursor protein, frataxin undergoes a two-step proteolytic maturation before translocating to the mitochondria (1). The functions of frataxin in the mitochondria have yet to be fully elucidated, though it has been suggested to be an iron chaperone and activator of persulfide transfer from the cysteine desulfurase NFS1 to the scaffold protein ISCU, which occurs in the early stages of ISC assembly. Proper expression levels of frataxin are vital for cell survival, as is highlighted by the fact that complete loss of this protein is embryonically lethal in mice. In humans, the expansion of GAA repeats in the first intron of the frataxin gene (FXN) results in a reduction in its protein expression levels, leading to the development of  Friedreich’s ataxia (FRDA). FRDA is an early-onset neurodegenerative disorder and the most common inherited form of ataxia, affecting 1 in 50,000 people. The downregulation of frataxin in FRDA results in mitochondrial iron and reactive oxygen species (ROS) accumulation, mitochondrial dysfunction, and ferroptosis. Patients with FRDA present with a myriad of symptoms, including gait disturbances, cardiomyopathy, muscle weakness, and increased incidence of diabetes. Individuals with higher GAA repeats exhibit more severe and earlier onset of symptoms (2-4).

  1. Cherubini, F. et al. (2015) Hum Mol Genet 24, 4296-305.
  2. Ast, T. et al. (2019) Cell 177, 1507-1521.e16.
  3. Du, J. et al. (2020) Redox Biol 32, 101483.
  4. Ahmad, I. et al. (2024) Stem Cell Res 77, 103382.

Species Reactivity

Species reactivity is determined by testing in at least one approved application (e.g., western blot).

Western Blot Buffer

IMPORTANT: For western blots, incubate membrane with diluted primary antibody in 5% w/v nonfat dry milk, 1X TBS, 0.1% Tween® 20 at 4°C with gentle shaking, overnight.

Applications Key

WB: Western Blotting IHC-P: Immunohistochemistry (Paraffin)

Cross-Reactivity Key

H: human M: mouse R: rat Hm: hamster Mk: monkey Vir: virus Mi: mink C: chicken Dm: D. melanogaster X: Xenopus Z: zebrafish B: bovine Dg: dog Pg: pig Sc: S. cerevisiae Ce: C. elegans Hr: horse GP: Guinea Pig Rab: rabbit All: all species expected

Trademarks and Patents

Cell Signaling Technology is a trademark of Cell Signaling Technology, Inc.
All other trademarks are the property of their respective owners. Visit cellsignal.com/trademarks for more information.

使用に関する制限

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Revision 1
#64668

Frataxin (F4V2S) Rabbit mAb

Western Blotting Image 1: Frataxin (F4V2S) Rabbit mAb Expand Image
Western blot analysis of extracts from various cell lines and tissues using Frataxin (F4V2S) Rabbit mAb (upper) or GAPDH (D16H11) XP® Rabbit mAb #5174 (lower).
Western Blotting Image 2: Frataxin (F4V2S) Rabbit mAb Expand Image
Western blot analysis of extracts from SW480 cells, transfected with control siRNA (-) or Frataxin siRNA (+), using Frataxin (F4V2S) Rabbit mAb (upper) or GAPDH (D16H11) XP® Rabbit mAb #5174 (lower).
Western Blotting Image 3: Frataxin (F4V2S) Rabbit mAb Expand Image
Western blot analysis of extracts from 293T cells, mock transfected (-) or transfected with a construct expressing Myc/DDK-tagged human frataxin protein (hFrataxin-Myc/DDK; +), using Frataxin (F4V2S) Rabbit mAb (upper), Myc-Tag (71D10) Rabbit mAb #2278 (middle), or GAPDH (D16H11) XP® Rabbit mAb #5174 (lower).
Immunohistochemistry Image 1: Frataxin (F4V2S) Rabbit mAb Expand Image
Immunohistochemical analysis of paraffin-embedded human endometrioid adenocarcinoma using Frataxin (F4V2S) Rabbit mAb.
Immunohistochemistry Image 2: Frataxin (F4V2S) Rabbit mAb Expand Image
Immunohistochemical analysis of paraffin-embedded human colon adenocarcinoma using Frataxin (F4V2S) Rabbit mAb.
Immunohistochemistry Image 3: Frataxin (F4V2S) Rabbit mAb Expand Image
Immunohistochemical analysis of paraffin-embedded human squamous cell carcinoma of the cervix using Frataxin (F4V2S) Rabbit mAb.
Immunohistochemistry Image 4: Frataxin (F4V2S) Rabbit mAb Expand Image
Immunohistochemical analysis of paraffin-embedded human papillary thyroid carcinoma using Frataxin (F4V2S) Rabbit mAb.
Immunohistochemistry Image 5: Frataxin (F4V2S) Rabbit mAb Expand Image
Immunohistochemical analysis of paraffin-embedded human squamous cell lung carcinoma using Frataxin (F4V2S) Rabbit mAb.
Immunohistochemistry Image 6: Frataxin (F4V2S) Rabbit mAb Expand Image
Immunohistochemical analysis of paraffin-embedded normal human liver using Frataxin (F4V2S) Rabbit mAb.
Immunohistochemistry Image 7: Frataxin (F4V2S) Rabbit mAb Expand Image
Immunohistochemical analysis of paraffin-embedded normal human testis using Frataxin (F4V2S) Rabbit mAb.
Immunohistochemistry Image 8: Frataxin (F4V2S) Rabbit mAb Expand Image
Immunohistochemical analysis of paraffin-embedded normal human adrenal gland using Frataxin (F4V2S) Rabbit mAb.
Immunohistochemistry Image 9: Frataxin (F4V2S) Rabbit mAb Expand Image
Immunohistochemical analysis of paraffin-embedded human endometrioid adenocarcinoma using Frataxin (F4V2S) Rabbit mAb (left) compared to concentration-matched Rabbit (DA1E) mAb IgG XP® Isotype Control #3900 (right). 
Immunohistochemistry Image 10: Frataxin (F4V2S) Rabbit mAb Expand Image
Immunohistochemical analysis of paraffin-embedded HepG2 cell pellet (left, high-expressing) or U-87MG cell pellet (right, low-expressing) using Frataxin (F4V2S) Rabbit mAb.