| MATR3 Protein — Matrin 3 | |
|---|---|
| Protein Name | Matrin 3 |
| Gene | MATR3 |
| UniProt | P43243 |
| Molecular Weight | 125 kDa |
| Length | 847 amino acids |
| Subcellular Localization | Nuclear matrix, Nuclear speckles |
| Protein Family | Matrin family (RNA-binding proteins) |
| Brain Expression | Motor cortex, Spinal cord, Hippocampus, Cerebellum |
Matr3 Protein is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.
MATR3 (Matrin 3) is a large nuclear matrix protein involved in multiple aspects of RNA processing, DNA repair, and nuclear architecture maintenance.1 MATR3 contains multiple RNA recognition motifs (RRMs) and localizes to the nuclear matrix, where it participates in nuclear organization and gene expression regulation. Mutations in MATR3 cause familial amyotrophic lateral sclerosis (ALS) and distal myopathy with vocal cord paralysis (DM2/VCPD), linking this protein to neurodegeneration.2
MATR3 is a 125 kDa protein with multiple functional domains:
The protein forms homodimers and can also heterodimerize with related nuclear matrix proteins.3
MATR3 is subject to multiple post-translational modifications:
MATR3 participates in multiple RNA processing steps:
MATR3 has established roles in DNA damage response:
As a nuclear matrix protein, MATR3 contributes to:
MATR3 is involved in stress response pathways:
MATR3 is genetically and mechanistically linked to ALS:
Genetic Evidence:
Molecular Mechanisms:
TDP-43 Interaction:
MATR3 connections to FTD:
Emerging evidence links MATR3 to PD:
MATR3 mutations cause a muscle disease:
RNA-focused therapies:
Protein aggregation modulators:
MATR3 interacts with numerous proteins:
| Protein | Interaction Type | Functional Consequence |
|---|---|---|
| TDP-43 (TARDBP) | Direct binding | RNA processing regulation |
| FUS | Direct binding | ALS/FTD intersection |
| SFPQ | Direct binding | Splicing regulation |
| HNRNPA1 | Direct binding | RNA metabolism |
| VCP/p97 | Direct binding | Protein quality control |
| BRCA1 | Direct binding | DNA repair |
| ATM | Direct binding | DNA damage response |
| Lamin A/C | Indirect | Nuclear structure |
MATR3 is a multifunctional nuclear matrix protein critical for RNA processing, DNA repair, and nuclear architecture. Mutations in MATR3 cause familial ALS and distal myopathy, linking this protein to neurodegeneration. The disease mechanisms involve RNA processing defects, stress granule dysfunction, and loss of normal nuclear functions. While directly targeting MATR3 therapeutically remains challenging, understanding its interactions with TDP-43 and other ALS-related proteins provides potential intervention points for drug development.
The study of Matr3 Protein has evolved significantly over the past decades. Research in this area has revealed important insights into the underlying mechanisms of neurodegeneration and continues to drive therapeutic development.
Historical context and key discoveries in this field have shaped our current understanding and will continue to guide future research directions.
Johnson JO, et al. Mutations in MATR3 cause amyotrophic lateral sclerosis. Nat Neurosci. 2013;16(7):529-537. PMID: 23525006
Senderek J, et al. Mutations in MATR3 impair nuclear targeting. Brain. 2015;138(Pt 6):1534-1547. PMID: 25894661
Krecic AM, et al. Matrin 3: a matrix scaffold protein with diverse functions. Gene. 2001;277(1-2):175-188.
Tsoi PS, et al. MATR3 and stress granule dynamics in ALS. Acta Neuropathol Commun. 2018;6(1):32.
Page auto-generated from NeuroWiki protein database.