Table 1.
PARK symbol | Gene locus | Gene | Phenotype | Inheritance pattern | Penetrance | Presence of Lewy bodies | Clinical features |
---|---|---|---|---|---|---|---|
Confirmed causative genes | |||||||
PARK1 and 4 | 4q21 | SNCA | EOPD | AD | 40% (duplication); 85% (A53T) | Yes | Rapid progression; high prevalence of dementia and psychiatric complications 15 |
PARK2 | 6q26 | Parkin | EOPD | AR | 100% | No | Slow progression; frequent motor fluctuations; high prevalence of dystonia 16 |
PARK6 | 1p36 | PINK1 | EOPD | AR | 100% | One case | Slow progression; good response to levodopa 17 |
PARK7 | 1p36 | DJ1 | EOPD | AR | 100% | Unknown | Slow progression; good response to levodopa 15 |
PARK8 | 12q12 | LRRK2 | LOPD | AD | 32%–75% (G2019S) | Yes | Slow progression; low prevalence of dementia and psychiatric disturbances 18 , 19 |
PARK9 | 1p36 | ATP13A2 | EOPD | AR | Incomplete, age‐associated | Unknown | Kufor–Rakeb syndrome; rapid progression 15 |
PARK14 | 22q13.1 | PLA2G6 | EOPD or adult‐onset | AR | Incomplete | Yes | Rapidly progressive parkinsonism with dystonia, and cognitive impairment 20 |
PARK15 | 22q1 | FBXO7 | EOPD | AR | Unknown | Unknown | Variable phenotypes; classical PD ± pyramidal tracts signs 21 |
PARK17 | 16q11.2 | VPS35 | Classical PD | AD | Incomplete, age‐associated | Yes | Parkinsonism; low prevalence of dyskinesia and dystonia 22 , 23 |
PARK19 | 1p31.3 | DNAJC6 | EOPD | AR | Unknown | Unknown | Slowly progressive; classic PD with mental retardation and seizures 24 , 25 |
PARK20 | 21q22.2 | SYNJ1 | EOPD | AR | 100% | Unknown | Progressive parkinsonism may include seizures, abnormal eye movements, and dystonia 26 |
Susceptibility genes that need confirmation | |||||||
PARK5 | 4p13 | UCHL1 | Classical PD | AD | Incomplete | Unknown | Typical idiopathic PD 15 |
PARK11 | 2q37 | GIGYF2 | LOPD | AD | Incomplete, age‐associated | Unknown | Typical idiopathic PD with psychiatric symptoms 27 |
PARK13 | 2p12 | HTRA2 | Classical PD | AD | Low penetrance | Unknown | Typical idiopathic PD; good response to levodopa 28 |
PARK18 | 3q27.1 | EIF4G1 | Classical PD | AD | Incomplete, age‐associated | Yes | Parkinsonism; mild progression; preserved cognitive function 29 |
PARK21 | 3q22 | TMEM230 | Classical PD | AD | Incomplete (heterozygous mutations) | Yes | Slowly progressive asymmetric parkinsonism 30 |
PARK22 | 7p11.2 | CHCHD2 | Classical PD | AD | Incomplete | Unknown | Typical idiopathic PD; good response to levodopa 31 |
Risk factor gene | |||||||
NA | 1q21 | GBA | NA | AD/AR | Incomplete, age‐associated | Yes | Accelerated progression and high risk of cognitive impairment 32 , 33 |
Abbreviations: AD, autosomal dominant; AR, autosomal recessive; EOPD, early‐onset PD; LOPD, late‐onset PD; NA, not applicable; PD, Parkinson's disease.