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Protein A2BP1 PDB 2cq3.png
Available structures
PDB Ortholog search: PDBe RCSB
Aliases RBFOX1, 2BP1, A2BP1, FOX-1, FOX1, HRNBP1, RNA binding protein, fox-1 homolog 1, RNA binding fox-1 homolog 1
External IDs MGI: 1926224 HomoloGene: 69339 GeneCards: RBFOX1
Gene location (Human)
Chromosome 16 (human)
Chr. Chromosome 16 (human)[1]
Chromosome 16 (human)
Genomic location for RBFOX1
Genomic location for RBFOX1
Band 16p13.3 Start 5,239,802 bp[1]
End 7,713,338 bp[1]
RNA expression pattern
PBB GE A2BP1 221217 s at tn.png
More reference expression data
Species Human Mouse
RefSeq (mRNA)
RefSeq (protein)
Location (UCSC) Chr 16: 5.24 – 7.71 Mb Chr 16: 6.81 – 7.41 Mb
PubMed search [3] [4]
View/Edit Human View/Edit Mouse

Fox-1 homolog A, also known as ataxin 2-binding protein 1 (A2BP1) or hexaribonucleotide-binding protein 1 (HRNBP1) or RNA binding protein, fox-1 homolog (Rbfox1), is a protein that in humans is encoded by the RBFOX1 gene.[5]


Rbfox1 has an RNA recognition motif that is highly conserved among RNA-binding proteins. Rbfox1, and the related protein Rbfox2, bind the consensus RNA sequence motif (U)GCAUG within introns to exert their functions as alternative splicing factors.[6][7]

Additionally, the Rbfox1/A2BP1 protein binds to the C-terminus of ataxin-2, and may contribute to the restricted pathology of spinocerebellar ataxia type 2 (SCA2). Ataxin-2 is the gene product of the SCA2 gene which causes familial neurodegenerative diseases. Several alternatively spliced transcript variants have been found for this gene. Some of these variants localize to the nucleus and some other to the cytoplasm. Nuclear variants have a well-established role in tissue specific alternative splicing.[8] Rbfox1 cytoplasmic variants modulate mRNA stability and translation.[9][10] In stressed cells, Rbfox1 has been demonstrated to localize to cytoplasmic stress granules.[11][12]

See also[edit]


  1. ^ a b c GRCh38: Ensembl release 89: ENSG00000078328 - Ensembl, May 2017
  2. ^ a b c GRCm38: Ensembl release 89: ENSMUSG00000008658 - Ensembl, May 2017
  3. ^ "Human PubMed Reference:". 
  4. ^ "Mouse PubMed Reference:". 
  5. ^ "Entrez Gene: A2BP1 ataxin 2-binding protein 1". 
  6. ^ Jin, Y. (2003-02-17). "A vertebrate RNA-binding protein Fox-1 regulates tissue-specific splicing via the pentanucleotide GCAUG". The EMBO Journal. Wiley-Blackwell. 22 (4): 905–912. doi:10.1093/emboj/cdg089. ISSN 1460-2075. 
  7. ^ Ponthier, Julie L.; Schluepen, Christina; Chen, Weiguo; Lersch, Robert A.; Gee, Sherry L.; Hou, Victor C.; Lo, Annie J.; Short, Sarah A.; Chasis, Joel A.; Winkelmann, John C.; Conboy, John G. (2006-03-14). "Fox-2 Splicing Factor Binds to a Conserved Intron Motif to Promote Inclusion of Protein 4.1R Alternative Exon 16". Journal of Biological Chemistry. American Society for Biochemistry & Molecular Biology (ASBMB). 281 (18): 12468–12474. doi:10.1074/jbc.m511556200. ISSN 0021-9258. 
  8. ^ Kuroyanagi H (2009). "Fox-1 family of RNA-binding proteins". Cellular and Molecular Life Sciences : CMLS. 66 (24): 3895–907. doi:10.1007/s00018-009-0120-5. PMC 2777236Freely accessible. PMID 19688295. 
  9. ^ Carreira-Rosario, Arnaldo; et al. (7 March 2016). "Repression of Pumilio Protein Expression by Rbfox1 Promotes Germ Cell Differentiation". Dev. Cell. doi:10.1016/j.devcel.2016.02.010. 
  10. ^ Lee JA, Damianov A, Lin CH, Fontes M, Parikshak NN, Anderson ES, Geschwind DH, Black DL, Martin KC (2016). "Cytoplasmic Rbfox1 Regulates the Expression of Synaptic and Autism-Related Genes". Neuron. 89 (1): 113–28. doi:10.1016/j.neuron.2015.11.025. PMC 4858412Freely accessible. PMID 26687839. 
  11. ^ Park, Chungoo; Choi, Sunkyung; Kim, Yong-Eun; Lee, Siyeo; Park, Su-Hyung; Adelstein, Robert S.; Kawamoto, Sachiyo; Kim, Kee K. (2017-09-11). "Stress Granules Contain Rbfox2 with Cell Cycle-related mRNAs". Scientific Reports. 7 (1): 11211. doi:10.1038/s41598-017-11651-w. ISSN 2045-2322. PMC 5593835Freely accessible. PMID 28894257. 
  12. ^ Jain, Saumya; Wheeler, Joshua R.; Walters, Robert W.; Agrawal, Anurag; Barsic, Anthony; Parker, Roy (2016-01-28). "ATPase-Modulated Stress Granules Contain a Diverse Proteome and Substructure". Cell. 164 (3): 487–498. doi:10.1016/j.cell.2015.12.038. ISSN 1097-4172. PMC 4733397Freely accessible. PMID 26777405. 

Further reading[edit]