EA1
MCID: EPS042
MIFTS: 58

Episodic Ataxia, Type 1 (EA1)

Categories: Ear diseases, Eye diseases, Genetic diseases, Neuronal diseases, Rare diseases

Aliases & Classifications for Episodic Ataxia, Type 1

MalaCards integrated aliases for Episodic Ataxia, Type 1:

Name: Episodic Ataxia, Type 1 58 56
Episodic Ataxia Type 1 12 25 60 30 6 15 74
Episodic Ataxia with Myokymia 58 60 76
Ea1 58 25 76
Episodic Ataxia/myokymia Syndrome 58 13
Isaacs Syndrome 45 74
Eam 58 76
Paroxysmal Ataxia with Neuromyotonia, Hereditary 58
Continuous Muscle Fiber Activity, Hereditary 74
Hereditary Continuous Muscle Fiber Activity 60
Ataxia, Episodic, with Myokymia; Aem; Aemk 58
Paroxysmal Ataxia with Neuromyotonia 76
Episodic Ataxia with Myokymia; Eam 58
Ataxia, Episodic, with Myokymia 58
Myokymia with Periodic Ataxia 58
Ataxia, Episodic, Type 1 41
Myokymia Isolated 1 76
Episodic Ataxia 1 76
Aemk 76
Ea-1 76
Aem 58
Mk1 76

Characteristics:

Orphanet epidemiological data:

60
hereditary continuous muscle fiber activity
Age of onset: Childhood,Infancy;
episodic ataxia type 1
Inheritance: Autosomal dominant;

OMIM:

58
Inheritance:
autosomal dominant

Miscellaneous:
onset in childhood
highly variable severity
symptoms precipitated by sudden movement, stress, exertion, fatigue, illness
typical attacks last from seconds to minutes, but longer occurrences have been reported
aura may occur
some patients may develop interictal progressive ataxia
variable response to acetazolamide and carbamazepine


HPO:

33
episodic ataxia, type 1:
Onset and clinical course variable expressivity juvenile onset
Inheritance autosomal dominant inheritance


GeneReviews:

25
Penetrance Most individuals harboring a kcna1 pathogenic variant exhibit features of ea1; however, penetrance is incomplete...

Classifications:

Orphanet: 60  
Rare neurological diseases


Summaries for Episodic Ataxia, Type 1

UniProtKB/Swiss-Prot : 76 Episodic ataxia 1: An autosomal dominant disorder characterized by brief episodes of ataxia and dysarthria. Neurological examination during and between the attacks demonstrates spontaneous, repetitive discharges in the distal musculature (myokymia) that arise from peripheral nerve. Nystagmus is absent. Myokymia isolated 1: A condition characterized by spontaneous involuntary contraction of muscle fiber groups that can be observed as vermiform movement of the overlying skin. Electromyography typically shows continuous motor unit activity with spontaneous oligo- and multiplet-discharges of high intraburst frequency (myokymic discharges). Isolated spontaneous muscle twitches occur in many persons and have no grave significance.

MalaCards based summary : Episodic Ataxia, Type 1, also known as episodic ataxia type 1, is related to episodic ataxia and pseudomyotonia, and has symptoms including ataxia, muscle weakness and myalgia. An important gene associated with Episodic Ataxia, Type 1 is KCNA1 (Potassium Voltage-Gated Channel Subfamily A Member 1), and among its related pathways/superpathways are Transmission across Chemical Synapses and Potassium Channels. The drugs Omega 3 Fatty Acid and Hyaluronic acid have been mentioned in the context of this disorder. Affiliated tissues include skin, brain and testes, and related phenotypes are emg abnormality and type 1 muscle fiber predominance

Disease Ontology : 12 An episodic ataxia that is characterized by periodic ataxia and frequent myokymic discharges, and has material basis in autosomal dominant inheritance of mutation in the potassium channel gene KCNA1.

OMIM : 58 Episodic ataxia is a neurologic condition characterized by spells of incoordination and imbalance, often associated with progressive ataxia (Jen et al., 2007). (160120)

GeneReviews: NBK25442

Related Diseases for Episodic Ataxia, Type 1

Diseases in the Episodic Ataxia family:

Episodic Ataxia, Type 2 Episodic Ataxia, Type 1
Episodic Ataxia, Type 4 Episodic Ataxia, Type 3
Episodic Ataxia, Type 7 Episodic Ataxia, Type 6
Episodic Ataxia, Type 5 Episodic Ataxia, Type 8

Diseases related to Episodic Ataxia, Type 1 via text searches within MalaCards or GeneCards Suite gene sharing:

(show top 50) (show all 66)
# Related Disease Score Top Affiliating Genes
1 episodic ataxia 29.3 KCNAB1 KCNA4 KCNA2 KCNA1 CACNB4 CACNA1A
2 pseudomyotonia 11.5
3 neuromyotonia and axonal neuropathy, autosomal recessive 11.1
4 lymphoma 10.2
5 spondylocarpotarsal synostosis syndrome 10.1
6 gastric cancer 10.1
7 microinvasive gastric cancer 10.1
8 myocarditis 10.1
9 autoimmune myocarditis 10.1
10 epilepsy 10.1
11 melanoma metastasis 10.1
12 melanoma 10.1
13 episodic ataxia, type 7 10.0 CACNA1A KCNA1
14 benign neonatal seizures 10.0 KCNA1 KCNA2
15 spinocerebellar ataxia 27 10.0 CACNA1A KCNA1
16 myasthenia gravis 10.0
17 thymoma 10.0
18 dystonia 10.0
19 myasthenia gravis congenital 10.0
20 spinocerebellar ataxia 6 10.0 CACNA1A KCNA1
21 lymphoma, hodgkin, classic 10.0
22 asthma 10.0
23 welander distal myopathy 10.0
24 pemphigus foliaceus 10.0
25 acute myocarditis 10.0
26 pain - chronic 10.0
27 microtia 10.0
28 ataxia and polyneuropathy, adult-onset 9.9
29 hereditary ataxia 9.9 CACNA1A KCNA1
30 episodic kinesigenic dyskinesia 1 9.8 KCNA1 PNKD
31 systemic lupus erythematosus 9.8
32 rheumatoid arthritis 9.8
33 stiff-person syndrome 9.8
34 varicose veins 9.8
35 thymoma, familial 9.8
36 hemophilia a 9.8
37 muscle hypertrophy 9.8
38 arthritis 9.8
39 chronic inflammatory demyelinating polyneuropathy 9.8
40 hepatitis 9.8
41 hepatitis b 9.8
42 focal dystonia 9.8
43 pain agnosia 9.8
44 dermatomyositis 9.8
45 esophageal varix 9.8
46 guillain-barre syndrome 9.8
47 polyneuropathy 9.8
48 spindle cell carcinoma 9.8
49 myopathy 9.8
50 demyelinating polyneuropathy 9.8

Graphical network of the top 20 diseases related to Episodic Ataxia, Type 1:



Diseases related to Episodic Ataxia, Type 1

Symptoms & Phenotypes for Episodic Ataxia, Type 1

Human phenotypes related to Episodic Ataxia, Type 1:

60 33 (show all 44)
# Description HPO Frequency Orphanet Frequency HPO Source Accession
1 emg abnormality 60 33 hallmark (90%) Very frequent (99-80%) HP:0003457
2 type 1 muscle fiber predominance 60 33 hallmark (90%) Very frequent (99-80%) HP:0003803
3 spastic gait 60 33 hallmark (90%) Very frequent (99-80%) HP:0002064
4 poor coordination 60 33 hallmark (90%) Very frequent (99-80%) HP:0002370
5 postural instability 60 33 hallmark (90%) Very frequent (99-80%) HP:0002172
6 myokymia 60 33 hallmark (90%) Very frequent (99-80%) HP:0002411
7 elevated serum creatine kinase 33 hallmark (90%) HP:0003236
8 diplopia 60 33 frequent (33%) Frequent (79-30%) HP:0000651
9 hyperhidrosis 60 33 frequent (33%) Frequent (79-30%) HP:0000975
10 ataxia 60 33 frequent (33%) Frequent (79-30%) HP:0001251
11 dysarthria 60 33 frequent (33%) Frequent (79-30%),Frequent (79-30%) HP:0001260
12 slurred speech 60 33 frequent (33%) Frequent (79-30%) HP:0001350
13 muscle stiffness 60 33 frequent (33%) Frequent (79-30%) HP:0003552
14 vertigo 60 33 frequent (33%) Frequent (79-30%) HP:0002321
15 clumsiness 60 33 frequent (33%) Frequent (79-30%) HP:0002312
16 blurred vision 60 33 frequent (33%) Frequent (79-30%) HP:0000622
17 headache 60 33 frequent (33%) Frequent (79-30%) HP:0002315
18 nausea 60 33 frequent (33%) Frequent (79-30%) HP:0002018
19 muscle spasm 33 frequent (33%) HP:0003394
20 seizures 60 33 occasional (7.5%) Occasional (29-5%) HP:0001250
21 delayed speech and language development 60 33 occasional (7.5%) Occasional (29-5%) HP:0000750
22 hypertonia 60 33 occasional (7.5%) Occasional (29-5%) HP:0001276
23 myotonia 60 33 occasional (7.5%) Occasional (29-5%) HP:0002486
24 respiratory distress 60 33 occasional (7.5%) Occasional (29-5%) HP:0002098
25 specific learning disability 60 33 occasional (7.5%) Occasional (29-5%) HP:0001328
26 motor delay 60 33 occasional (7.5%) Occasional (29-5%) HP:0001270
27 kyphoscoliosis 60 33 occasional (7.5%) Occasional (29-5%) HP:0002751
28 choreoathetosis 60 33 occasional (7.5%) Occasional (29-5%) HP:0001266
29 cerebellar atrophy 60 33 occasional (7.5%) Occasional (29-5%) HP:0001272
30 congenital diaphragmatic hernia 60 33 occasional (7.5%) Occasional (29-5%) HP:0000776
31 calf muscle hypertrophy 60 33 occasional (7.5%) Occasional (29-5%) HP:0008981
32 hand clenching 60 33 occasional (7.5%) Occasional (29-5%) HP:0001188
33 craniofacial disproportion 60 33 occasional (7.5%) Occasional (29-5%) HP:0005461
34 tip-toe gait 60 33 occasional (7.5%) Occasional (29-5%) HP:0030051
35 tremor 33 HP:0001337
36 hyperreflexia 33 HP:0001347
37 scoliosis 60 Occasional (29-5%)
38 elevated serum creatine phosphokinase 60 Very frequent (99-80%)
39 abnormality of movement 60 Very frequent (99-80%)
40 babinski sign 33 HP:0003487
41 muscle cramps 60 Frequent (79-30%)
42 abnormality of the hand 33 HP:0001155
43 incoordination 33 HP:0002311
44 episodic ataxia 33 HP:0002131

Symptoms via clinical synopsis from OMIM:

58
Neurologic Central Nervous System:
dysarthria
hyperreflexia
slurred speech
headache
spastic gait
more
Head And Neck Eyes:
blurred vision, episodic

Muscle Soft Tissue:
calf muscle enlargement
emg shows polyphasic continuous motor unit discharges
muscle biopsy shows enlargement of type i muscle fibers, consistent with denervation

Laboratory Abnormalities:
increased serum creatine kinase during episodes

Head And Neck Ears:
vertigo, episodic

Skeletal Hands:
hand posture resembling carpopedal spasm, episodic

Neurologic Peripheral Nervous System:
myokymia, interictal
jerking movements of face and limbs

Clinical features from OMIM:

160120

UMLS symptoms related to Episodic Ataxia, Type 1:


ataxia, muscle weakness, myalgia, headache, myokymia, muscular fasciculation, muscle cramp, muscle rigidity, muscle spasticity, dizziness, neuralgia, muscular stiffness, coarse tremor

MGI Mouse Phenotypes related to Episodic Ataxia, Type 1:

47
# Description MGI Source Accession Score Top Affiliating Genes
1 behavior/neurological MP:0005386 9.5 CACNA1A CACNB4 KCNA1 KCNA2 KCNA4 KCNAB1
2 nervous system MP:0003631 9.17 CACNA1A CACNB4 KCNA1 KCNA2 KCNA4 KCNAB1

Drugs & Therapeutics for Episodic Ataxia, Type 1

Drugs for Episodic Ataxia, Type 1 (from DrugBank, HMDB, Dgidb, PharmGKB, IUPHAR, NovoSeek, BitterDB):

(show top 50) (show all 69)
# Name Status Phase Clinical Trials Cas Number PubChem Id
1 Omega 3 Fatty Acid Phase 4
2
Hyaluronic acid Approved, Vet_approved Phase 2 9004-61-9 53477741
3
BCG vaccine Investigational Phase 2
4 Protective Agents Phase 2
5 Immunologic Factors Phase 2
6 Viscosupplements Phase 2
7 Vaccines Phase 2
8 Adjuvants, Immunologic Phase 2
9
Acetaminophen Approved Not Applicable 103-90-2 1983
10
Hydrochlorothiazide Approved, Vet_approved 58-93-5 3639
11
Amlodipine Approved 88150-42-9 2162
12
Olmesartan Approved, Investigational 144689-24-7, 144689-63-4 130881 158781
13
Histamine Approved, Investigational Not Applicable 51-45-6 774
14
Cetirizine Approved Not Applicable 83881-51-0 2678
15
Propofol Approved, Investigational, Vet_approved Not Applicable 2078-54-8 4943
16
Remifentanil Approved Not Applicable 132875-61-7 60815
17
Ropivacaine Approved Not Applicable 84057-95-4 71273 175805
18
Methylprednisolone hemisuccinate Approved 2921-57-5
19
Methylprednisolone Approved, Vet_approved 83-43-2 6741
20
Prednisolone phosphate Approved, Vet_approved 302-25-0
21
Prednisolone Approved, Vet_approved 50-24-8 5755
22
Calcium Approved, Nutraceutical Not Applicable 7440-70-2 271
23 Simendan Investigational 131741-08-7
24
Substance P Investigational Not Applicable 33507-63-0 44359816
25
Prednisolone hemisuccinate Experimental 2920-86-7
26 Hormones Not Applicable
27 Hormone Antagonists Not Applicable
28 Hormones, Hormone Substitutes, and Hormone Antagonists Not Applicable
29 Anesthetics Not Applicable
30 Antipyretics Not Applicable
31 Peripheral Nervous System Agents Not Applicable
32 Analgesics, Non-Narcotic Not Applicable
33 Analgesics Not Applicable
34 Antihypertensive Agents
35 diuretics
36 Sodium Chloride Symporter Inhibitors
37 Mineralocorticoids
38 Natriuretic Agents
39 Mineralocorticoid Receptor Antagonists
40 Vasodilator Agents
41 Phosphodiesterase Inhibitors
42 Phosphodiesterase 3 Inhibitors
43 Cardiotonic Agents
44 Anti-Allergic Agents Not Applicable
45
Histamine Phosphate Not Applicable 51-74-1 65513
46 Neurotransmitter Agents Not Applicable
47 Histamine H1 Antagonists Not Applicable
48 Histamine H1 Antagonists, Non-Sedating Not Applicable
49 Histamine Antagonists Not Applicable
50 methicillin Not Applicable

Interventional clinical trials:

(show top 50) (show all 54)
# Name Status NCT ID Phase Drugs
1 Visual Acuity After the Combined Binocular Implantation of +2.75 Diopters and +3.25 Diopters Tecnis Multifocal Intraocular Lenses. Completed NCT02633072 Phase 4
2 Visual Acuity After the Combined Binocular Implantation of +2.5 Diopters and +3.0 Diopters ReSTOR Multifocal Intraocular Lenses. Completed NCT02314572 Phase 4
3 Influence of an Oral Nutritional Supplement Rich in Omega-3 Fatty Acids on Functional State and Quality of Life in Malnourished Patients With Gastroenterological Tumors Completed NCT00168987 Phase 4 oral nutritional supplement rich in eicosapentanoic acid
4 Healing of Burns and the Effect of Shockwave Therapy on the Recovery of Skin Grafts Completed NCT01242423 Phase 2, Phase 3
5 Influence of Hyaluronic Acid on Bacillus Calmette-Guérin Local Side Effects Completed NCT02207608 Phase 2 Hyaluronic Acid;BCG (Immucist®)
6 Effects of Weight Loss on Nutritional Mediated Hormone Secretion Unknown status NCT02649907 Not Applicable
7 Arthrocentesis Study Unknown status NCT02530229
8 Impact of Prewarming on Perioperative Body Core Temperature and the Outcomes of Cytoreductive- and Major Open Abdominal Surgery: A Randomised Trial Unknown status NCT02364219 Not Applicable
9 Therapy Adherence of APAP Therapy Initiation in Sleep-lab Versus at Home Unknown status NCT02339597 Not Applicable
10 Stroke Volume Analysis During Aortic Valve Replacement Trial Unknown status NCT02156856
11 Medication Adherence and "True" Resistance in Patients With Resistant Hypertension Unknown status NCT02128386
12 Influence of Transcranial Direct Current Stimulation on Cortical Plasticity in Concussed Athletes Unknown status NCT01593956 Not Applicable
13 Evaluation of a Combined Parent-student Programme for Smoking Prevention in Berlin Schools Unknown status NCT01306552 Not Applicable
14 Sentinel Concept in Early Stage Cervical Cancer Unknown status NCT01157962 Not Applicable
15 Longitudinal MRI Examinations of Patients With Brain Ischemia and Blood Brain Barrier Permeability Unknown status NCT02077582
16 Renal Effects of Levosimendan in Cardiac Surgery Patients Completed NCT01918618
17 Levosimendan Administration and Outcome in Cardiac Surgery Completed NCT02275013 Levosimendan
18 Plethysmographic Pulse-contour and Pulse-wave-transit-times for Haemodynamic Evaluation in Bleeding Simulation Completed NCT03481855
19 Emotional Processing in Multiple Sclerosis / Clinically Isolated Syndrome: A Neuropsychological fMRI-study Completed NCT02695394
20 Clinical, Neurophysiological and Neuroendocrine Effects of Aerobe Exercise in Generalized Anxiety Disorder (GAD) Completed NCT02662803 Not Applicable
21 An Animated Home-based Physical Exercise Program as a Treatment Option for Patients With Rheumatoid Arthritis Completed NCT02658370 Not Applicable
22 EVENT - Evaluation of the Influence of hTEE Completed NCT02046954
23 Transcranial Direct Current Stimulation on Cortical Plasticity in Patients With Anti-NMDA Receptor Encephalitis Completed NCT01865578 Not Applicable
24 Art Therapy in Acute Schizophrenia Completed NCT01622166 Not Applicable
25 Effectiveness of Intensive Aphasia Therapy Under Routine Clinical Conditions Completed NCT01540383 Not Applicable
26 Clinical-genetic Investigations in Children With Early Infantile Epilepsies Completed NCT01357707
27 Low Grade Inflammation, Gut Microbiota and Barrier Function in Elderly Humans Completed NCT01218165 Early Phase 1
28 New E-Service for a Dietary Approach to the Elderly Completed NCT01179789 Early Phase 1
29 Coronary CT Angiography Using 320-Row Volume CT in Patients With Atrial Fibrillation Completed NCT00968279
30 Coronary Artery Stent Evaluation With 320-slice Computed Tomography - The CArS 320 Study Completed NCT00967876
31 The Effect of Physical Therapy on Raynaud`s Phenomenon Secondary to Systemic Sclerosis Completed NCT00946738 Not Applicable
32 320-slice Coronary Computed Tomography (CT) Angiography Completed NCT00721851
33 Claustrophobia and Magnetic Resonance Imaging Completed NCT00715806 Not Applicable
34 Acupuncture for Seasonal Allergic Rhinitis Completed NCT00610584 Not Applicable cetirizine dihydrochloride (rescue medication)
35 AUTO-ACUSAR - Effects of Acupuncture on the Autonomic Nervous System in Seasonal Allergic Rhinitis Patients Completed NCT01271595 Not Applicable
36 Validation of Stroke Volume Measurement by a New Noninvasive Hemodynamic Monitoring System (NexFin)in Comparison to Different Invasive Procedures as Picco2, FloTrac and TEE Completed NCT01263990 Not Applicable
37 Cesarean-scar Thickness and Closure Technique Completed NCT02338388 Not Applicable
38 Prediction of Claustrophobia During MR Imaging Completed NCT01367067
39 Thermal Management in Patients With Interventional Minimally Invasive Valve Replacement Completed NCT01176110 Not Applicable
40 Electroacupuncture for Acute Pancreatitis Recruiting NCT03173222 Not Applicable
41 PRediction of Acute Coronary Syndrome in Acute Ischemic StrokE Recruiting NCT03609385
42 Methicillin-sensitive and Methicillin-resistant Staphylococcus Aureus (MSSA/MRSA) - Point-of-care-testing (POCT) in Clinical Decision Making Recruiting NCT03220386 Not Applicable
43 Systematic Screening for Comorbid Psychological Conditions in Cardiac ACSC Patients With Multimorbidity in the ED Recruiting NCT03188861
44 Regional Anaesthesia and Substance P in Head and Neck Cancer Recruiting NCT03081897 Not Applicable SPRANC Block group;SPRANC Control group
45 Cause and Importance of the Age-dependent Sarcopenia Recruiting NCT02994901
46 Glucocorticoid-induced Osteoporosis in Patients With Chronic Inflammatory Rheumatic Diseases or Psoriasis Recruiting NCT02719314 Glucocorticoid treatment
47 Modified Psychodynamic Psychotherapy for Patients With Schizophrenia Recruiting NCT02576613 Not Applicable
48 Diagnostic Imaging Strategies for Patients With Stable Chest Pain and Intermediate Risk of Coronary Artery Disease Recruiting NCT02400229 Not Applicable
49 Retrospective Evaluation of POCD Data of Studies From KAI, Charité - Universitätsmedizin Berlin Recruiting NCT02832193
50 Longitudinal Cohort Study - for the Treatment of Acute Postoperative Pain and Postoperative Delirium, Postoperative Cognitive Dysfunctions, and Chronic Pain. Recruiting NCT03133858

Search NIH Clinical Center for Episodic Ataxia, Type 1

Cochrane evidence based reviews: isaacs syndrome

Genetic Tests for Episodic Ataxia, Type 1

Genetic tests related to Episodic Ataxia, Type 1:

# Genetic test Affiliating Genes
1 Episodic Ataxia Type 1 30 KCNA1

Anatomical Context for Episodic Ataxia, Type 1

MalaCards organs/tissues related to Episodic Ataxia, Type 1:

42
Skin, Brain, Testes

Publications for Episodic Ataxia, Type 1

Articles related to Episodic Ataxia, Type 1:

(show all 34)
# Title Authors Year
1
Mutations underlying Episodic Ataxia type-1 antagonize Kv1.1 RNA editing. ( 28216637 )
2017
2
Episodic Ataxia Type 1 (K-channelopathy) Manifesting as Paroxysmal Nonkinesogenic Dyskinesia: Expanding the Phenotype. ( 30363417 )
2017
3
The episodic ataxia type 1 mutation I262T alters voltage-dependent gating and disrupts protein biosynthesis of human Kv1.1 potassium channels. ( 26778656 )
2016
4
Whole-exome sequencing as a diagnostic tool in a family with episodic ataxia type 1. ( 25659636 )
2015
5
New insights into the pathogenesis and therapeutics of episodic ataxia type 1. ( 26347608 )
2015
6
Episodic ataxia type 1: clinical characterization, quality of life and genotype-phenotype correlation. ( 24578548 )
2014
7
Episodic ataxia type 1 without episodic ataxia: the diagnostic utility of nerve excitability studies in individuals with KCNA1 mutations. ( 23909822 )
2013
8
Ion channel disorders: still a fascinating topic--news on episodic ataxia type 1. ( 23457223 )
2013
9
Clinical, genetic, neurophysiological and functional study of new mutations in episodic ataxia type 1. ( 23349320 )
2013
10
Episodic ataxia type 1 mutations affect fast inactivation of K+ channels by a reduction in either subunit surface expression or affinity for inactivation domain. ( 21307345 )
2011
11
Nongenetic factors influence severity of episodic ataxia type 1 in monozygotic twins. ( 21282599 )
2011
12
Mechanism of accelerated current decay caused by an episodic ataxia type-1-associated mutant in a potassium channel pore. ( 22131406 )
2011
13
Nerve excitability studies characterize Kv1.1 fast potassium channel dysfunction in patients with episodic ataxia type 1. ( 21106501 )
2010
14
Nongenetic factors influence severity of episodic ataxia type 1 in monozygotic twins. ( 20660867 )
2010
15
Episodic ataxia type 1 mutations differentially affect neuronal excitability and transmitter release. ( 19779067 )
2009
16
A novel KCNA1 mutation identified in an Italian family affected by episodic ataxia type 1. ( 18926884 )
2008
17
Episodic ataxia type 1 mutation F184C alters Zn2+-induced modulation of the human K+ channel Kv1.4-Kv1.1/Kvbeta1.1. ( 16956965 )
2007
18
Episodic ataxia type 1: a neuronal potassium channelopathy. ( 17395136 )
2007
19
Episodic ataxia type 1 mutations in the KCNA1 gene impair the fast inactivation properties of the human potassium channels Kv1.4-1.1/Kvbeta1.1 and Kv1.4-1.1/Kvbeta1.2. ( 17156368 )
2006
20
An episodic ataxia type-1 mutation in the S1 segment sensitises the hKv1.1 potassium channel to extracellular Zn2+. ( 15474044 )
2004
21
Episodic ataxia type 1 with distal weakness: a novel manifestation of a potassium channelopathy. ( 15127317 )
2004
22
A mouse model of episodic ataxia type-1. ( 12612586 )
2003
23
Functional characterization of an episodic ataxia type-1 mutation occurring in the S1 segment of hKv1.1 channels. ( 12799903 )
2003
24
Episodic ataxia type 1 mutations in the human Kv1.1 potassium channel alter hKvbeta 1-induced N-type inactivation. ( 12077175 )
2002
25
Clinical features of a large Australian pedigree with episodic ataxia type 1. ( 11746627 )
2001
26
Episodic ataxia type-1 mutations in the Kv1.1 potassium channel display distinct folding and intracellular trafficking properties. ( 11679591 )
2001
27
Identification of a novel missense mutation L329I in the episodic ataxia type 1 gene KCNA1 -- a challenging problem. ( 11013453 )
2000
28
Mutations in the KCNA1 gene associated with episodic ataxia type-1 syndrome impair heteromeric voltage-gated K(+) channel function. ( 10428758 )
1999
29
Functional characterization of a novel mutation in KCNA1 in episodic ataxia type 1 associated with epilepsy. ( 10414318 )
1999
30
A novel mutation in the human voltage-gated potassium channel gene (Kv1.1) associates with episodic ataxia type 1 and sometimes with partial epilepsy. ( 10355668 )
1999
31
Expression in mammalian cells and electrophysiological characterization of two mutant Kv1.1 channels causing episodic ataxia type 1 (EA-1). ( 10383630 )
1999
32
Episodic ataxia type-1 mutations in the hKv1.1 cytoplasmic pore region alter the gating properties of the channel. ( 9482717 )
1998
33
Episodic ataxia type 1 and 2 (familial periodic ataxia/vertigo). ( 9390841 )
1997
34
Episodic Ataxia Type 1 ( 20301785 )
1993

Variations for Episodic Ataxia, Type 1

UniProtKB/Swiss-Prot genetic disease variations for Episodic Ataxia, Type 1:

76 (show all 17)
# Symbol AA change Variation ID SNP ID
1 KCNA1 p.Val174Phe VAR_001508 rs104894349
2 KCNA1 p.Ile177Arg VAR_001509
3 KCNA1 p.Thr226Ala VAR_001510 rs104894354
4 KCNA1 p.Arg239Ser VAR_001511 rs104894348
5 KCNA1 p.Phe249Ile VAR_001512 rs104894356
6 KCNA1 p.Val404Ile VAR_001513 rs104894355
7 KCNA1 p.Val408Ala VAR_001514 rs104894352
8 KCNA1 p.Phe184Cys VAR_020830 rs104894357
9 KCNA1 p.Thr226Met VAR_020831 rs28933383
10 KCNA1 p.Glu325Asp VAR_020832 rs104894353
11 KCNA1 p.Leu329Ile VAR_020833
12 KCNA1 p.Ser342Ile VAR_020834
13 KCNA1 p.Thr226Lys VAR_037100 rs28933383
14 KCNA1 p.Thr226Arg VAR_037101 rs28933383
15 KCNA1 p.Ala242Pro VAR_037102 rs28933381
16 KCNA1 p.Pro244His VAR_037103 rs28933382
17 KCNA1 p.Asn255Asp VAR_072397 rs121918067

ClinVar genetic disease variations for Episodic Ataxia, Type 1:

6 (show top 50) (show all 74)
# Gene Variation Type Significance SNP ID Assembly Location
1 KCNA1 NM_000217.3(KCNA1): c.1296C> G (p.Ser432=) single nucleotide variant Benign rs76066681 GRCh37 Chromosome 12, 5021840: 5021840
2 KCNA1 NM_000217.3(KCNA1): c.1296C> G (p.Ser432=) single nucleotide variant Benign rs76066681 GRCh38 Chromosome 12, 4912674: 4912674
3 KCNA1 NM_000217.3(KCNA1): c.1223T> C (p.Val408Ala) single nucleotide variant Pathogenic rs104894352 GRCh37 Chromosome 12, 5021767: 5021767
4 KCNA1 NM_000217.3(KCNA1): c.1223T> C (p.Val408Ala) single nucleotide variant Pathogenic rs104894352 GRCh38 Chromosome 12, 4912601: 4912601
5 KCNA1 NM_000217.3(KCNA1): c.715C> A (p.Arg239Ser) single nucleotide variant Pathogenic rs104894348 GRCh37 Chromosome 12, 5021259: 5021259
6 KCNA1 NM_000217.3(KCNA1): c.715C> A (p.Arg239Ser) single nucleotide variant Pathogenic rs104894348 GRCh38 Chromosome 12, 4912093: 4912093
7 KCNA1 NM_000217.3(KCNA1): c.520G> T (p.Val174Phe) single nucleotide variant Pathogenic rs104894349 GRCh37 Chromosome 12, 5021064: 5021064
8 KCNA1 NM_000217.3(KCNA1): c.520G> T (p.Val174Phe) single nucleotide variant Pathogenic rs104894349 GRCh38 Chromosome 12, 4911898: 4911898
9 KCNA1 NM_000217.3(KCNA1): c.745T> A (p.Phe249Ile) single nucleotide variant Pathogenic rs104894356 GRCh37 Chromosome 12, 5021289: 5021289
10 KCNA1 NM_000217.3(KCNA1): c.745T> A (p.Phe249Ile) single nucleotide variant Pathogenic rs104894356 GRCh38 Chromosome 12, 4912123: 4912123
11 KCNA1 NM_000217.3(KCNA1): c.551T> G (p.Phe184Cys) single nucleotide variant Pathogenic rs104894357 GRCh37 Chromosome 12, 5021095: 5021095
12 KCNA1 NM_000217.3(KCNA1): c.551T> G (p.Phe184Cys) single nucleotide variant Pathogenic rs104894357 GRCh38 Chromosome 12, 4911929: 4911929
13 KCNA1 NM_000217.3(KCNA1): c.975G> C (p.Glu325Asp) single nucleotide variant Pathogenic rs104894353 GRCh37 Chromosome 12, 5021519: 5021519
14 KCNA1 NM_000217.3(KCNA1): c.975G> C (p.Glu325Asp) single nucleotide variant Pathogenic rs104894353 GRCh38 Chromosome 12, 4912353: 4912353
15 KCNA1 NM_000217.3(KCNA1): c.676A> G (p.Thr226Ala) single nucleotide variant Pathogenic rs104894354 GRCh37 Chromosome 12, 5021220: 5021220
16 KCNA1 NM_000217.3(KCNA1): c.676A> G (p.Thr226Ala) single nucleotide variant Pathogenic rs104894354 GRCh38 Chromosome 12, 4912054: 4912054
17 KCNA1 NM_000217.3(KCNA1): c.1210G> A (p.Val404Ile) single nucleotide variant Pathogenic rs104894355 GRCh37 Chromosome 12, 5021754: 5021754
18 KCNA1 NM_000217.3(KCNA1): c.1210G> A (p.Val404Ile) single nucleotide variant Pathogenic rs104894355 GRCh38 Chromosome 12, 4912588: 4912588
19 KCNA1 NM_000217.3(KCNA1): c.530T> A (p.Ile177Asn) single nucleotide variant Pathogenic rs267607195 GRCh37 Chromosome 12, 5021074: 5021074
20 KCNA1 NM_000217.3(KCNA1): c.530T> A (p.Ile177Asn) single nucleotide variant Pathogenic rs267607195 GRCh38 Chromosome 12, 4911908: 4911908
21 KCNA1 NM_000217.3(KCNA1): c.1249C> T (p.Arg417Ter) single nucleotide variant Pathogenic rs104894358 GRCh37 Chromosome 12, 5021793: 5021793
22 KCNA1 NM_000217.3(KCNA1): c.1249C> T (p.Arg417Ter) single nucleotide variant Pathogenic rs104894358 GRCh38 Chromosome 12, 4912627: 4912627
23 KCNA1 NM_000217.3(KCNA1): c.677C> G (p.Thr226Arg) single nucleotide variant Pathogenic rs28933383 GRCh37 Chromosome 12, 5021221: 5021221
24 KCNA1 NM_000217.3(KCNA1): c.677C> G (p.Thr226Arg) single nucleotide variant Pathogenic rs28933383 GRCh38 Chromosome 12, 4912055: 4912055
25 KCNA1 NM_000217.3(KCNA1): c.1222G> T (p.Val408Leu) single nucleotide variant Pathogenic rs113994117 GRCh37 Chromosome 12, 5021766: 5021766
26 KCNA1 NM_000217.3(KCNA1): c.1222G> T (p.Val408Leu) single nucleotide variant Pathogenic rs113994117 GRCh38 Chromosome 12, 4912600: 4912600
27 KCNA1 NM_000217.3(KCNA1): c.1241T> G (p.Phe414Cys) single nucleotide variant Pathogenic rs113994118 GRCh37 Chromosome 12, 5021785: 5021785
28 KCNA1 NM_000217.3(KCNA1): c.1241T> G (p.Phe414Cys) single nucleotide variant Pathogenic rs113994118 GRCh38 Chromosome 12, 4912619: 4912619
29 KCNA1 NM_000217.3(KCNA1): c.677C> T (p.Thr226Met) single nucleotide variant Pathogenic rs28933383 GRCh37 Chromosome 12, 5021221: 5021221
30 KCNA1 NM_000217.3(KCNA1): c.677C> T (p.Thr226Met) single nucleotide variant Pathogenic rs28933383 GRCh38 Chromosome 12, 4912055: 4912055
31 KCNA1 NM_000217.3(KCNA1): c.684T> C (p.Cys228=) single nucleotide variant Benign rs1048500 GRCh37 Chromosome 12, 5021228: 5021228
32 KCNA1 NM_000217.3(KCNA1): c.684T> C (p.Cys228=) single nucleotide variant Benign rs1048500 GRCh38 Chromosome 12, 4912062: 4912062
33 KCNA1 NM_000217.2(KCNA1): c.748_750delTTC (p.Phe250del) deletion Pathogenic rs113994120 GRCh37 Chromosome 12, 5021292: 5021294
34 KCNA1 NM_000217.2(KCNA1): c.748_750delTTC (p.Phe250del) deletion Pathogenic rs113994120 GRCh38 Chromosome 12, 4912126: 4912128
35 KCNA1 NM_000217.3(KCNA1): c.804G> C (p.Thr268=) single nucleotide variant Benign rs2227910 GRCh37 Chromosome 12, 5021348: 5021348
36 KCNA1 NM_000217.3(KCNA1): c.804G> C (p.Thr268=) single nucleotide variant Benign rs2227910 GRCh38 Chromosome 12, 4912182: 4912182
37 KCNA1 NM_000217.3(KCNA1): c.1440T> A (p.Thr480=) single nucleotide variant Benign rs4766309 GRCh37 Chromosome 12, 5021984: 5021984
38 KCNA1 NM_000217.3(KCNA1): c.1440T> A (p.Thr480=) single nucleotide variant Benign rs4766309 GRCh38 Chromosome 12, 4912818: 4912818
39 KCNA1 NM_000217.3(KCNA1): c.1464G> A (p.Lys488=) single nucleotide variant Conflicting interpretations of pathogenicity rs147828649 GRCh37 Chromosome 12, 5022008: 5022008
40 KCNA1 NM_000217.3(KCNA1): c.1464G> A (p.Lys488=) single nucleotide variant Conflicting interpretations of pathogenicity rs147828649 GRCh38 Chromosome 12, 4912842: 4912842
41 KCNA1 NM_000217.3(KCNA1): c.1125C> T (p.Tyr375=) single nucleotide variant Likely benign rs144351014 GRCh37 Chromosome 12, 5021669: 5021669
42 KCNA1 NM_000217.3(KCNA1): c.1125C> T (p.Tyr375=) single nucleotide variant Likely benign rs144351014 GRCh38 Chromosome 12, 4912503: 4912503
43 KCNA1 NM_000217.3(KCNA1): c.53A> C (p.His18Pro) single nucleotide variant Uncertain significance rs367921276 GRCh37 Chromosome 12, 5020597: 5020597
44 KCNA1 NM_000217.3(KCNA1): c.53A> C (p.His18Pro) single nucleotide variant Uncertain significance rs367921276 GRCh38 Chromosome 12, 4911431: 4911431
45 KCNA1 NM_000217.3(KCNA1): c.1183G> T (p.Ala395Ser) single nucleotide variant Likely pathogenic rs1135401950 GRCh38 Chromosome 12, 4912561: 4912561
46 KCNA1 NM_000217.3(KCNA1): c.1183G> T (p.Ala395Ser) single nucleotide variant Likely pathogenic rs1135401950 GRCh37 Chromosome 12, 5021727: 5021727
47 KCNA1 NM_000217.3(KCNA1): c.60G> C (p.Gln20His) single nucleotide variant Uncertain significance rs201504073 GRCh37 Chromosome 12, 5020604: 5020604
48 KCNA1 NM_000217.3(KCNA1): c.60G> C (p.Gln20His) single nucleotide variant Uncertain significance rs201504073 GRCh38 Chromosome 12, 4911438: 4911438
49 KCNA1 NM_000217.3(KCNA1): c.393G> A (p.Arg131=) single nucleotide variant Benign/Likely benign rs142184899 GRCh38 Chromosome 12, 4911771: 4911771
50 KCNA1 NM_000217.3(KCNA1): c.393G> A (p.Arg131=) single nucleotide variant Benign/Likely benign rs142184899 GRCh37 Chromosome 12, 5020937: 5020937

Expression for Episodic Ataxia, Type 1

Search GEO for disease gene expression data for Episodic Ataxia, Type 1.

Pathways for Episodic Ataxia, Type 1

GO Terms for Episodic Ataxia, Type 1

Cellular components related to Episodic Ataxia, Type 1 according to GeneCards Suite gene sharing:

(show all 14)
# Name GO ID Score Top Affiliating Genes
1 cell projection GO:0042995 9.73 CACNA1A KCNA1 KCNA2 KCNA4
2 dendrite GO:0030425 9.69 CACNA1A KCNA1 KCNA2
3 neuronal cell body GO:0043025 9.67 CACNA1A KCNA1 KCNAB1
4 axon GO:0030424 9.56 KCNA1 KCNA2 KCNA4 KCNAB1
5 presynaptic membrane GO:0042734 9.52 KCNA1 KCNA2
6 perikaryon GO:0043204 9.5 KCNA1 KCNA2 KCNAB1
7 integral component of presynaptic membrane GO:0099056 9.48 KCNA1 KCNA2
8 axon terminus GO:0043679 9.46 KCNA1 KCNA2
9 voltage-gated potassium channel complex GO:0008076 9.46 KCNA1 KCNA2 KCNA4 KCNAB1
10 voltage-gated calcium channel complex GO:0005891 9.4 CACNA1A CACNB4
11 calyx of Held GO:0044305 9.37 KCNA1 KCNA2
12 juxtaparanode region of axon GO:0044224 9.13 KCNA1 KCNA2 KCNAB1
13 potassium channel complex GO:0034705 8.8 KCNA1 KCNA2 KCNAB1
14 plasma membrane GO:0005886 10.01 CACNA1A CACNB4 KCNA1 KCNA2 KCNA4 KCNAB1

Biological processes related to Episodic Ataxia, Type 1 according to GeneCards Suite gene sharing:

# Name GO ID Score Top Affiliating Genes
1 transmembrane transport GO:0055085 9.72 CACNA1A KCNA1 KCNA2 KCNA4 KCNAB1
2 chemical synaptic transmission GO:0007268 9.65 CACNA1A CACNB4 KCNA1
3 protein homooligomerization GO:0051260 9.58 KCNA1 KCNA2 KCNA4
4 potassium ion transport GO:0006813 9.56 KCNA1 KCNA2 KCNA4 KCNAB1
5 neuronal action potential GO:0019228 9.46 KCNA1 KCNA2
6 potassium ion transmembrane transport GO:0071805 9.46 KCNA1 KCNA2 KCNA4 KCNAB1
7 neuromuscular process GO:0050905 9.43 CACNA1A KCNA1
8 ion transport GO:0006811 9.43 CACNA1A CACNB4 KCNA1 KCNA2 KCNA4 KCNAB1
9 membrane depolarization GO:0051899 9.37 CACNA1A CACNB4
10 regulation of ion transmembrane transport GO:0034765 9.1 CACNA1A CACNB4 KCNA1 KCNA2 KCNA4 KCNAB1

Molecular functions related to Episodic Ataxia, Type 1 according to GeneCards Suite gene sharing:

# Name GO ID Score Top Affiliating Genes
1 potassium channel activity GO:0005267 9.43 KCNA1 KCNA2 KCNA4
2 calcium channel activity GO:0005262 9.4 CACNA1A CACNB4
3 voltage-gated calcium channel activity GO:0005245 9.37 CACNA1A CACNB4
4 delayed rectifier potassium channel activity GO:0005251 9.33 KCNA1 KCNA2 KCNA4
5 high voltage-gated calcium channel activity GO:0008331 9.32 CACNA1A CACNB4
6 voltage-gated potassium channel activity GO:0005249 9.26 KCNA1 KCNA2 KCNA4 KCNAB1
7 voltage-gated ion channel activity GO:0005244 9.02 CACNA1A KCNA1 KCNA2 KCNA4 KCNAB1

Sources for Episodic Ataxia, Type 1

3 CDC
7 CNVD
9 Cosmic
10 dbSNP
11 DGIdb
17 EFO
18 ExPASy
20 FMA
29 GO
30 GTR
31 HGMD
32 HMDB
33 HPO
34 ICD10
35 ICD10 via Orphanet
36 ICD9CM
37 IUPHAR
38 KEGG
39 LifeMap
41 LOVD
43 MedGen
45 MeSH
46 MESH via Orphanet
47 MGI
50 NCI
51 NCIt
52 NDF-RT
55 NINDS
56 Novoseek
58 OMIM
59 OMIM via Orphanet
63 PubMed
65 QIAGEN
70 SNOMED-CT via HPO
71 SNOMED-CT via Orphanet
72 TGDB
73 Tocris
74 UMLS
75 UMLS via Orphanet
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