FOX1 (Fox-1 Homolog A, Ataxin-2-binding Protein 1, A2BP1, A2BP, Hexaribonucleotide-binding Protein 1, HRNBP1, RNA Binding Protein Fox-1 Homolog 1, RBFOX1)

Fox1 is one of a family of 3 mammalian Fox1 homologs. Fox1 was discovered in C. elegans as a gene involved in sex determination, and the name Fox is an acronym of "Feminizing locus on X" (1). The C. elegans Fox1 protein and its 3 mammalian homologues are all about 46kD proteins and each includes a central highly conserved RRM type RNA recognition motif, which corresponds to a small ~70 amino acid structure consisting of 4 beta strands and two alpha-helices. This region is identical in all three mammalian Fox1 family proteins. An alternate name for Fox 1 is ataxin-2 binding protein 1 (A2BP1), since it was discovered in a yeast two hybrid screen using ataxin-2 as bait (2). As with the other Fox proteins, it is assumed that Fox1/A2BP1 has a role in the RNA splicing in the nervous system (3). Fox3, a protein also known as NeuN, is a widely used marker of neuronal nuclei and proximal cytoplasm (4, 5). Like Fox3, Fox1 is expressed in neuronal nuclei, but with a different pattern of expression than Fox3. For example, in the cerebellum Fox3 does not stain Purkinje neurons and Golgi neurons, but these two neuron types are stained by Fox1 antibody (6). Full length Fox1 was not used as the immunogen since the three mammalian Fox1 homologues, namely Fox1, Fox2 and Fox3, include virtually identical RRM motifs. The N-terminal region of the three molecules are much more variable in the three molecules so antibodies specific for each of the three molecules can therefore be generated. The HGNC name for this protein is RBFOX1.\n\nApplications:\nSuitable for use in Immunofluorescence and Western Blot. Other applications not tested.\n\nRecommended Dilution:\nImmunofluorescence: 1:500-1:1000\nWestern Blot: 1:1000-1:2000\nOptimal dilutions to be determined by the researcher.\n\nStorage and Stability:\nMay be stored at 4 degrees C for short-term only. Aliquot to avoid repeated freezing and thawing. Store at -20 degrees C. Aliquots are stable for 12 months. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap.

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SPECIFICATIONS

Catalog Number

031361

Size

100ul

Applications

IF, WB

Hosts

Mouse

Reactivities

Hum, Mouse, Rat, Bov

Form

Supplied as a liquid in PBS, 10mM sodium azide.

P Type

Mab

Purity

Purified by affinity chromatography.

Isotype

IgG1,k

References

1. Hodgkin J, Zellan JD, Albertson DG. Identification of a candidate primary sex determination locus, fox-1, on the X chromosome of Caenorhabditis elegans. Development 120:3681-3689 (1994).\n\n2. Shibata H, Huynh DP, Pulst SM. A novel protein with RNA-binding motifs interacts with ataxin-2. Hum Mol Genet. 39:1303-13 (2000).\n\n3. Underwood JG, Boutz PL, Dougherty JD, Stoilov P and Black DL. Homologues of the Caenorhabditis elegans Fox-1 protein are neuronal splicing regulators in mammals. Mol. Cell. Biol. 25:10005-10016 (2005).\n\n4. Mullen RJ, Buck CR, Smith AM. NeuN, a neuronal specific nuclear protein in vertebrates. Development 116:201-211 (1994).\n\n5. Kim KK, Adelstein RS, Kawamoto S. Identification of neuronal nuclei (NeuN) as Fox-3, a new member of the Fox-1 gene family of splicing factors. J. Biol. Chem. 284:31052-31061 (2009).\n\n6. Kim KK, Kim YC, Adelstein RS, Kawamoto S. Fox-3 and PSF interact to activate neural cell-specific alternative splicing. Nucleic Acids Res. 39:3064-78 (2011).

Additional Info

Recognizes Fox1 from human, bovine, mouse and rat. Since Fox1 is highly conserved, it is likely that the antibody is effective on other species also.