Related Experiment Video
Updated: Sep 9, 2025
09:37
Navigating MARRVEL, a Web-Based Tool that Integrates Human Genomics and Model Organism Genetics Information
Published on: August 15, 2019
9.9K
Decoding ATXN2 Phosphocode: Structural Insights and Therapeutic Opportunities in Disease
Apoorva Pai Kalasa Anil Kumar1, Suhail Subair1, Prathik Basthikoppa Shivamurthy1
1Yenepoya University, Mangalore, India.
The Protein Journal
|August 30, 2025
Summary
This study maps critical phosphorylation sites on Ataxin-2 (ATXN2), revealing how their regulation impacts RNA metabolism and contributes to neurodegenerative diseases like Spinocerebellar Ataxia type 2 (SCA2) and amyotrophic lateral sclerosis (ALS), as well as cancer.
Area of Science:
- Molecular Biology
- Neuroscience
- Oncology
Background:
- Ataxin-2 (ATXN2) is a crucial RNA-binding protein involved in RNA metabolism, stress granule dynamics, and neuronal health.
- Dysregulated phosphorylation of ATXN2 is implicated in the pathogenesis of Spinocerebellar Ataxia type 2 (SCA2), amyotrophic lateral sclerosis (ALS), and various cancers.
Purpose of the Study:
- To comprehensively map and analyze critical phosphosites within ATXN2's intrinsically disordered regions.
- To elucidate the role of ATXN2 phosphorylation in regulating protein interactions and cellular processes relevant to disease.
- To identify potential therapeutic targets for ATXN2-related disorders.
Main Methods:
- Integration of structural biology, phosphoproteomics, and interactome analyses.
- Identification and characterization of six key ATXN2 phosphosites (S772, T741, S624, S684, S784, S889).
- Analysis of kinase (GSK3β, CDK13) and phosphatase (INPP5F) modulation of these phosphosites.
Main Results:
- Detailed mapping of six critical ATXN2 phosphosites within intrinsically disordered regions.
- Demonstration that these phosphosites modulate interactions with RNA-binding proteins and co-regulated proteins.
- Evidence linking altered ATXN2 phosphorylation to disrupted autophagy, nucleocytoplasmic transport, and stress granule dynamics.
Conclusions:
- Elucidation of the ATXN2 phosphocode provides a mechanistic understanding of its role in neurodegeneration and cancer.
- Targeted therapies, including kinase inhibitors and antisense oligonucleotides, show promise for treating ATXN2-related diseases.
- This research opens new avenues for precision medicine in treating complex diseases involving ATXN2 dysfunction.
Related Concept Videos
01:27Transducer Mechanism: Enzyme-Linked Receptors
2.8K
Enzyme-linked receptors are cell-surface receptors acting as an enzyme or associating with an enzyme intracellularly. They make excellent drug targets. Drugs can bind to the extracellular ligand-binding domain or directly affect their enzymatic domain and alter their activity.
Major types that are helpful drug targets include:
Major types that are helpful drug targets include:
2.8K
02:54Protein Kinases and Phosphatases
13.4K
Proteins undergo chemical modifications that trigger changes in the charge, structure, and conformation of the proteins. Phosphorylation, acetylation, glycosylation, nitrosylation, ubiquitination, lipidation, methylation, and proteolysis are various protein modifications that regulate protein activity. Such modifications are usually enzyme-driven.
Protein kinases
Many proteins in the cell are regulated by phosphorylation, the addition of a phosphate group. A family of enzymes called kinases...
Protein kinases
Many proteins in the cell are regulated by phosphorylation, the addition of a phosphate group. A family of enzymes called kinases...
13.4K
01:58Cell Specific Gene Expression
13.9K
Multicellular organisms contain a variety of structurally and functionally distinct cell types, but the DNA in all the cells originated from the same parent cells. The differences in the cells can be attributed to the differential gene expression. Liver cells, whose functions include detoxification of blood, production of bile to metabolize fats, and synthesis of proteins essential for metabolism, must express a specific set of genes to perform their functions. Gene expression also varies with...
13.9K
01:58X-Inactivation
39.2K
The human X chromosome contains over ten times the number of genes as in the Y chromosome. Since males have only one X chromosome, and females have two, one might expect females to produce twice as many of the proteins, with undesirable results.
39.2K
01:31Translation
15.5K
Translation is the process of synthesizing proteins from the genetic information carried by messenger RNA (mRNA). Following transcription, it constitutes the final step in the expression of genes. This process is carried out by ribosomes, complexes of protein and specialized RNA molecules. Ribosomes, transfer RNA (tRNA), and other proteins produce a chain of amino acids—the polypeptide—as the end product of translation.
Translation Produces the Building Blocks of Life
Proteins are...
Translation Produces the Building Blocks of Life
Proteins are...
15.5K
02:28Leaky Scanning
5.2K
During most eukaryotic translation processes, the small 40S ribosome subunit scans an mRNA from its 5' end until it encounters the first start AUG codon. The large 60S ribosomal subunit then joins the smaller one to initiate protein synthesis. The location of the translation initiation is largely determined by the nucleotides near the start codon as there may be multiple translation initiation sites present on the mRNA. Marilyn Kozak discovered that the sequence RCCAUGG (where R...
5.2K