TWNK - twinkle mtDNA helicase Gene
Also Known as PEO; PEO1; SCA8; ATXN8; IOSCA; PEOA3; SANDO; TWINL; MTDPS7; PRLTS5; C10orf2
Species: Homo sapiens
About TWNK
This gene has 9 transcripts (splice variants), 208 orthologues and is associated with 9 phenotypes. Ubiquitous expression in testis (RPKM 6.0), lymph node (RPKM 3.3) and 25 other tissues.
Summary
This gene encodes a hexameric DNA helicase which unwinds short stretches of double-stranded DNA in the 5' to 3' direction and, along with mitochondrial single-stranded DNA binding protein and mtDNA polymerase gamma, is thought to play a key role in mtDNA replication. The protein localizes to the mitochondrial matrix and mitochondrial nucleoids. Mutations in this gene cause infantile onset spinocerebellar ataxia (IOSCA) and progressive external ophthalmoplegia (PEO) and are also associated with several mitochondrial depletion syndromes. Alternative splicing results in multiple transcript variants encoding distinct isoforms.[provided by RefSeq, Aug 2009]
TWNK Products (5)
| mRNA | Protein | Name |
|---|---|---|
| NM_001163812.2 | NP_001157284.1 | twinkle mtDNA helicase isoform B |
| NM_001163813.2 | NP_001157285.1 | twinkle mtDNA helicase isoform C |
| NM_001163814.2 | NP_001157286.1 | twinkle mtDNA helicase isoform D |
| NM_001368275.1 | NP_001355204.1 | twinkle mtDNA helicase isoform C |
| NM_021830.5 | NP_068602.2 | twinkle mtDNA helicase isoform A |
| Molecular Function GO Annotation | Evidence | References | Source |
|---|---|---|---|
| enables 5'-3' DNA helicase activity |
IDA
IDA: Inferred from direct assay
|
12975372 | GOA |
| enables ATP hydrolysis activity |
IDA
IDA: Inferred from direct assay
|
34950192 | GOA |
| enables identical protein binding |
IPI
IPI: Inferred from physical interaction
|
18971204 | GOA |
| enables lipid binding |
IDA
IDA: Inferred from direct assay
|
34950192 | GOA |
| enables protease binding |
IPI
IPI: Inferred from physical interaction
|
14739292 | GOA |
| enables protein binding |
IPI
IPI: Inferred from physical interaction
|
28514442 | GOA |
| enables single-stranded DNA binding |
IDA
IDA: Inferred from direct assay
|
18971204 | GOA |
| Biological Process GO Annotation | Evidence | References | Source |
|---|---|---|---|
| involved in DNA unwinding involved in DNA replication |
IDA
IDA: Inferred from direct assay
|
15167897 | GOA |
| involved in mitochondrial DNA replication |
IMP
IMP: Inferred from mutant phenotype
|
18971204 | GOA |
| involved in mitochondrial transcription |
IMP
IMP: Inferred from mutant phenotype
|
18971204 | GOA |
| involved in protein hexamerization |
IDA
IDA: Inferred from direct assay
|
18971204 | GOA |
| Cellular Component GO Annotation | Evidence | References | Source |
|---|---|---|---|
| is active in mitochondrial chromosome |
IDA
IDA: Inferred from direct assay
|
26253742 | GOA |
| located in mitochondrial nucleoid |
IDA
IDA: Inferred from direct assay
|
18063578 | GOA |
TWNK Protein Structure
AAA_25: AAA domain (389 - 563)
- 0
- 200
- 400
- 600
- 684 a.a.
| Protein Preferred Names | Protein Names | |
|---|---|---|
|
twinkle mtDNA helicase |
|
TWNK Protein-protein interaction Information
|
Type
|
Protein Name | Protein ID | Interactor | Interactor Species | Interactor ID | Detection Method | References |
|---|---|---|---|---|---|---|---|
|
Intra
|
TWNK | Q96RR1 | LGALS3BP | Homo sapiens | Q08380 | 33961781 | |
|
Intra
|
TWNK | Q96RR1 | LGALS3BP | Homo sapiens | Q08380 | 28514442 |
Related Diseases
| Diseases | Alias | |
|---|---|---|
| Mitochondrial Dna Depletion Syndrome 7 |
|
|
| Progressive External Ophthalmoplegia With Mitochondrial Dna Deletions, Autosomal Dominant 3 |
|
|
| Perrault Syndrome 5 |
|
|
| Progressive External Ophthalmoplegia With Mitochondrial Dna Deletions, Autosomal Dominant 1 |
|
|
| Spinocerebellar Ataxia 8 |
|
|
| Autosomal Dominant Progressive External Ophthalmoplegia |
|
|
| Mitochondrial Disease |
|
|
| Perrault Syndrome |
|
|
| Sensory Ataxic Neuropathy, Dysarthria, And Ophthalmoparesis |
|
|
| Chronic Progressive External Ophthalmoplegia |
|
|
| Mental Depression |
|
|
| Mitochondrial Dna Depletion Syndrome |
|
|
| Polg-Related Disorders |
|
|
| Major Depressive Disorder |
|
|
| Parkinsonism |
|
|
| Axonal Neuropathy |
|
|
| Kearns-Sayre Syndrome |
|
|
| Neuropathy |
|
|
| Mitochondrial Metabolism Disease |
|
|
| Athetosis |
|
|
| Mitochondrial Dna Depletion Syndrome 6 |
|
|
| Ocular Motility Disease |
|
|
| Mitochondrial Dna Depletion Syndrome 4a |
|
|
| Myotonic Cataract |
|
|
| Lichtenstein-Knorr Syndrome |
|
|
| Myopathy |
|
|
| Bile Acid Synthesis Defect, Congenital, 1 |
|
|
| Pearson Marrow-Pancreas Syndrome |
|
|
| Neuropathy, Ataxia, And Retinitis Pigmentosa |
|
|
| 3-Methylglutaconic Aciduria, Type Iii |
|
|
| Mitochondrial Myopathy |
|
|
| Mitochondrial Dna Depletion Syndrome 4b |
|
|
| Huntington Disease-Like 2 |
|
|
| Progressive External Ophthalmoplegia With Mitochondrial Dna Deletions, Autosomal Dominant 4 |
|
|
| Mitochondrial Complex Iii Deficiency, Nuclear Type 2 |
|
|
| Marinesco-Sjogren Syndrome |
|
|
| 3-Methylglutaconic Aciduria |
|
|
| Leber Hereditary Optic Neuropathy, Modifier Of |
|
|
| Cranial Nerve Disease |
|
|
| Mitochondrial Encephalomyopathy |
|
|
| Early Myoclonic Encephalopathy |
|
|
| Myoclonic Epilepsy Associated With Ragged-Red Fibers |
|
|
| Autosomal Dominant Cerebellar Ataxia |
|
|
| Multiple Synostoses Syndrome |
|
|
| Fragile X-Associated Tremor/Ataxia Syndrome |
|
|
| Premature Menopause |
|
|
| Hereditary Ataxia |
|
|
| Cerebellar Disease |
|
|
| Mitochondrial Myopathy, Encephalopathy, Lactic Acidosis, And Stroke-Like Episodes |
|
|
| Ptosis |
|
|
| Leigh Syndrome |
|
|
| Optic Nerve Disease |
|
|
| Spastic Ataxia |
|
|
| Sensorineural Hearing Loss |
|
|
| Peripheral Nervous System Disease |
|
|
| Retinitis Pigmentosa |
|
|
Orthologs Information
| Species | Symbol | Source | ID |
|---|---|---|---|
| Bos taurus | TWNK | VGNC | VGNC:36527 |
| Rattus norvegicus | TWNK | RGD | RGD:1307884 |
| Mus musculus | TWNK | MGD | MGI:2137410 |
| Felis catus | TWNK | VGNC | VGNC:66717 |
| Canis familiaris | TWNK | VGNC | VGNC:48003 |
| Macaca mulatta | TWNK | VGNC | VGNC:106113 |
| Others | TWNK | NCBI |