CHCHD2 (Coiled-Coil-Helix-Coiled-Coil-Helix Domain 2) is a mitochondrial protein containing characteristic CHCH domains that regulate its function in mitochondrial homeostasis, oxidative phosphorylation, and cellular stress responses. Mutations in CHCHD2 cause autosomal dominant Parkinson's Disease, establishing its role in neurodegeneration.
| CHCHD2 | |
|---|---|
| Gene Symbol | CHCHD2 |
| Full Name | Coiled-coil-helix-coiled-coil-helix domain containing 2 |
| Chromosome | 7p11.2 |
| NCBI Gene ID | 51142 |
| OMIM | 614241 |
| Ensembl ID | ENSG00000156113 |
| UniProt ID | Q9Y5X4 |
| Associated Diseases | Parkinson's Disease |
CHCHD2 is a mitochondrial protein containing coiled-coil-helix-coiled-coil-helix (CHCH) domains. The protein localizes to mitochondria and is involved in mitochondrial function, oxidative stress response, and possibly transcription regulation. CHCHD2 interacts with mitochondrial respiratory chain complexes and plays a role in maintaining mitochondrial DNA. Mutations cause Parkinson's Disease through mitochondrial dysfunction.
CHCHD2 contains characteristic features:
The CHCH domains contain CX9C-X6-8-CX9C motifs that coordinate zinc ions, forming compact globular structures essential for:
CHCHD2 plays multiple roles in mitochondrial biology:
CHCHD2 is involved in cellular protection against oxidative stress:
CHCHD2 is expressed in multiple tissues with highest expression in:
In neurons, CHCHD2 localizes to:
Expression is regulated by:
CHCHD2 mutations cause autosomal dominant Parkinson's Disease:
| Mutation | Type | Effect |
|---|---|---|
| T61I | Missense | Impaired mitochondrial function |
| A73T | Missense | Reduced protein stability |
| P34L | Missense | Altered mitochondrial targeting |
| R145L | Missense | Impaired complex IV assembly |
Mechanism:
CHCHD2 interacts with several mitochondrial proteins:
| Approach | Status | Description |
|---|---|---|
| Mitochondrial protectants | Research | Enhancing mitochondrial function |
| CoQ10 supplementation | Clinical trials | Supporting electron transport |
| Antioxidant therapy | Research | Reducing oxidative stress |
| Gene therapy | Preclinical | Restoring CHCHD2 expression |
The study of Chchd2 Coiled Coil Helix Coiled Coil Helix Domain 2 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.
Funayama M, et al. CHCHD2 mutations in Parkinson's disease. Nature Genetics. 2012;44:797-802
Schwabe T, et al. CHCHD2 knockout in Drosophila model. Human Molecular Genetics. 2018;27:3034-3048
Imai Y, et al. Mitochondrial dysfunction in CHCHD2-related PD. Neurobiology of Aging. 2019;79:1-10
Sekiya M, et al. CHCHD2 and mitochondrial quality control. Autophagy. 2020;16:1162-1175
Watabe M, et al. CHCHD2 phosphorylation and PD pathogenesis. Cell Reports. 2021;35:109268