• Featured Product
  • KD/KO Validated

Ataxin 2 Polyclonal antibody

Ataxin 2 Polyclonal Antibody for IF, IHC, IP, WB, ELISA

Host / Isotype

Rabbit / IgG


human, mouse, rat and More (1)





Cat no : 21776-1-AP


ataxin 2, ATX2, ATXN2, SCA2, TNRC13

Tested Applications

Positive WB detected inHeLa cells, HEK-293 cells, Jurkat cells, Neuro-2a cells
Positive IP detected inHEK-293 cells
Positive IHC detected inmouse brain tissue, human gliomas tissue
Note: suggested antigen retrieval with TE buffer pH 9.0; (*) Alternatively, antigen retrieval may be performed with citrate buffer pH 6.0
Positive IF detected inHepG2 cells

Recommended dilution

Western Blot (WB)WB : 1:2000-1:16000
Immunoprecipitation (IP)IP : 0.5-4.0 ug for IP and 1:500-1:2000 for WB
Immunohistochemistry (IHC)IHC : 1:50-1:500
Immunofluorescence (IF)IF : 1:50-1:500
Sample-dependent, check data in validation data gallery

Product Information

The immunogen of 21776-1-AP is Ataxin 2 Fusion Protein expressed in E. coli.

Tested Reactivity human, mouse, rat
Cited Reactivityhuman, mouse, rat, mosue
Host / Isotype Rabbit / IgG
Class Polyclonal
Type Antibody
Immunogen Ataxin 2 fusion protein Ag16470
Full Name ataxin 2
Calculated molecular weight 1313 aa, 140 kDa
Observed molecular weight 140-150 kDa
GenBank accession numberBC114546
Gene symbol ATXN2
Gene ID (NCBI) 6311
Conjugate Unconjugated
Form Liquid
Purification Method Antigen affinity purification
Storage Buffer PBS with 0.02% sodium azide and 50% glycerol pH 7.3.
Storage ConditionsStore at -20°C. Stable for one year after shipment. Aliquoting is unnecessary for -20oC storage.

Background Information


 ATXN2 (Ataxin-2) is a eukaryotic RNA‐binding protein that is conserved across species. It contains two LSm domains (RNA binding), a PAM2 motif (association with poly(A)-binding protein), and an N-terminal polyglutamine tract (PMID: 25027299). Ataxin-2 plays crucial roles at different stages of the regulation of posttranslational gene expression. ATXN2 is also directly implicated in the regulation of neural function by influencing specific molecular and cellular pathways. Genetic expansion of a poly‐glutamine tract in human ATXN2 has been linked to several neurodegenerative diseases, where it most likely acts through gain‐of‐function effects.

 What is the molecular weight of ATXN2? 

 The molecular weight varies from 12 to 140 kDa, depending on the isoform.

 What are the isoforms of ATXN2?

 ATXN2 has many isoforms, which differ significantly in length and domain composition.

 What is the subcellular localization of ATXN2?

 According to siRNA-based experiments, it is localized in the cytoplasmic compartment of normal cells, where it mostly associates with the Golgi apparatus and stress granules (PMID: 22508507).

 What is the tissue specificity of ATXN2?

 ATXN2 protein has been detected in various tissues; however, it is most highly expressed and studied in CNS. Significant amounts of this protein can also be detected in the liver and gallbladder.

 What is the molecular function of ATXN2?

 Ataxin-2 is involved in regulating various steps of mRNA translation, including poly‐A tailing, RNA stabilization, microRNA‐dependent gene silencing, and translational activation. All those functions are linked to its interactions with the poly(A)-binding protein. Ataxin-2 is involved in the formation of stress granules and P-bodies. Furthermore, genetic models of ATXN2 loss‐of‐function have underlined the importance of ATXN2 in mTOR signaling and cellular metabolism, which are all crucial for neural homeostasis (PMID: 29869836).

 What is ATXN2's involvement in disease?

 The N-terminal region of ATXN2 normally contains a polyQ stretch of 14-31 residues that can be expanded in the pathogenic state to 32-200 residues. Intermediate length expansions of this tract increase susceptibility to amyotrophic lateral sclerosis (ALS or Lou Gehrig's disease) (PMID: 20740007). Long expansions of this tract result in spinocerebellar ataxia-2 (SCA2), an autosomal dominantly inherited, neurodegenerative disorder (PMID: 29427103). Genome-wide association studies indicate that loss-of-function mutations in this gene are associated with susceptibility to type I diabetes, obesity, and hypertension.


Product Specific Protocols
WB protocol for Ataxin 2 antibody 21776-1-APDownload protocol
IHC protocol for Ataxin 2 antibody 21776-1-APDownload protocol
IF protocol for Ataxin 2 antibody 21776-1-APDownload protocol
IP protocol for Ataxin 2 antibody 21776-1-APDownload protocol
Standard Protocols
Click here to view our Standard Protocols




Heterochromatin anomalies and double-stranded RNA accumulation underlie C9orf72 poly(PR) toxicity.

Authors - Yong-Jie Zhang


RNA Binding Antagonizes Neurotoxic Phase Transitions of TDP-43.

Authors - Jacob R Mann

Mol Neurodegener

Aberrant deposition of stress granule-resident proteins linked to C9orf72-associated TDP-43 proteinopathy.

Authors - Jeannie Chew


Chronic optogenetic induction of stress granules is cytotoxic and reveals the evolution of ALS-FTD pathology.

Authors - Peipei Zhang

Commun Biol

Conserved Pbp1/Ataxin-2 regulates retrotransposon activity and connects polyglutamine expansion-driven protein aggregation to lifespan-controlling rDNA repeats.

Authors - Lauren A Ostrowski


Internalization Characterization of Si Nanorod with Camouflaged Cell Membrane Proteins Reveals ATXN2 as a Negative Regulator.

Authors - Yi Lu
  • KD Validated