EPM3
MCID: EPL206
MIFTS: 27

Epilepsy, Progressive Myoclonic, 3, with or Without Intracellular Inclusions (EPM3)

Categories: Eye diseases, Genetic diseases, Metabolic diseases, Neuronal diseases, Rare diseases, Skin diseases

Aliases & Classifications for Epilepsy, Progressive Myoclonic, 3, with or Without Intracellular...

MalaCards integrated aliases for Epilepsy, Progressive Myoclonic, 3, with or Without Intracellular Inclusions:

Name: Epilepsy, Progressive Myoclonic, 3, with or Without Intracellular Inclusions 58
Epilepsy, Progressive Myoclonic 3, with or Without Intracellular Inclusions 58 76 13
Epilepsy, Progressive Myoclonic 3 30 6 74
Epm3 58 60 76
Cln14 Disease 60 30
Cln14 58 76
Progressive Myoclonic Epilepsy Due to Kctd7 Deficiency 60
Epilepsy, Myoclonic, Progressive, Type 3 ) 41
Ceroid Lipofuscinosis, Neuronal, 14; Cln14 58
Progressive Myoclonic Epilepsy Type 3 60
Progressive Myoclonus Epilepsy Type 3 60
Ceroid Lipofuscinosis, Neuronal, 14 58
Neuronal Ceroid Lipofuscinosis 14 76
Progressive Myoclonic Epilepsy 3 76
Pme Type 3 60

Characteristics:

Orphanet epidemiological data:

60
progressive myoclonic epilepsy type 3
Inheritance: Autosomal recessive; Prevalence: <1/1000000 (Worldwide); Age of onset: Infancy,Neonatal;

OMIM:

58
Inheritance:
autosomal recessive

Miscellaneous:
progressive disorder
onset before age 2 years
severe phenotype
two unrelated families have been reported (last curated july 2012)
only 1 family had ultrastructural cellular findings of neuronal ceroid lipofuscinosis


HPO:

33
epilepsy, progressive myoclonic, 3, with or without intracellular inclusions:
Onset and clinical course progressive
Inheritance autosomal recessive inheritance


Classifications:



Summaries for Epilepsy, Progressive Myoclonic, 3, with or Without Intracellular...

OMIM : 58 Mutations in the KCTD7 gene cause a severe neurodegenerative phenotype characterized by onset of intractable myoclonic seizures before age 2 years and accompanied by developmental regression. The initial description was consistent with a form of progressive myoclonic epilepsy (designated here as EPM3), whereas a later report identified intracellular accumulation of autofluorescent lipopigment storage material, consistent with neuronal ceroid lipofuscinosis (designated CLN14). Ultrastructural findings on skin biopsies thus appear to be variable. However, clinical features are generally consistent between reports (summary by Staropoli et al., 2012). For a general phenotypic description and a discussion of genetic heterogeneity of progressive myoclonic epilepsy, see EPM1A (254800). For a general phenotypic description and a discussion of genetic heterogeneity of neuronal ceroid lipofuscinosis, see CLN1 (256730). (611726)

MalaCards based summary : Epilepsy, Progressive Myoclonic, 3, with or Without Intracellular Inclusions, also known as epilepsy, progressive myoclonic 3, with or without intracellular inclusions, is related to epilepsy progressive myoclonic type 3, and has symptoms including ataxia, truncal and myoclonic seizures. An important gene associated with Epilepsy, Progressive Myoclonic, 3, with or Without Intracellular Inclusions is KCTD7 (Potassium Channel Tetramerization Domain Containing 7). Affiliated tissues include skin and eye, and related phenotypes are intellectual disability and dysarthria

UniProtKB/Swiss-Prot : 76 Epilepsy, progressive myoclonic 3, with or without intracellular inclusions: An autosomal recessive, severe, progressive myoclonic epilepsy with early onset. Multifocal myoclonic seizures begin between 16 and 24 months of age after normal initial development. Neurodegeneration and regression occur with seizure onset. Other features include mental retardation, dysarthria, truncal ataxia, and loss of fine finger movements. EEG shows slow dysrhythmia, multifocal and occasionally generalized epileptiform discharges. In some patients, ultrastructural findings on skin biopsies identify intracellular accumulation of autofluorescent lipopigment storage material, consistent with neuronal ceroid lipofuscinosis.

Related Diseases for Epilepsy, Progressive Myoclonic, 3, with or Without Intracellular...

Diseases related to Epilepsy, Progressive Myoclonic, 3, with or Without Intracellular Inclusions via text searches within MalaCards or GeneCards Suite gene sharing:

# Related Disease Score Top Affiliating Genes
1 epilepsy progressive myoclonic type 3 11.4

Symptoms & Phenotypes for Epilepsy, Progressive Myoclonic, 3, with or Without Intracellular...

Human phenotypes related to Epilepsy, Progressive Myoclonic, 3, with or Without Intracellular Inclusions:

60 33 (show all 27)
# Description HPO Frequency Orphanet Frequency HPO Source Accession
1 intellectual disability 60 33 frequent (33%) Frequent (79-30%) HP:0001249
2 dysarthria 60 33 frequent (33%) Frequent (79-30%) HP:0001260
3 developmental regression 60 33 frequent (33%) Frequent (79-30%) HP:0002376
4 progressive psychomotor deterioration 60 33 frequent (33%) Frequent (79-30%) HP:0007272
5 progressive truncal ataxia 60 33 frequent (33%) Frequent (79-30%) HP:0007221
6 focal myoclonic seizures 60 33 frequent (33%) Frequent (79-30%) HP:0011166
7 focal eeg discharges with secondary generalization 60 33 frequent (33%) Frequent (79-30%) HP:0011188
8 microcephaly 60 33 occasional (7.5%) Occasional (29-5%) HP:0000252
9 optic atrophy 60 33 occasional (7.5%) Occasional (29-5%) HP:0000648
10 abnormality of vision 60 33 occasional (7.5%) Occasional (29-5%) HP:0000504
11 generalized tonic-clonic seizures 60 33 occasional (7.5%) Occasional (29-5%) HP:0002069
12 febrile seizures 60 33 occasional (7.5%) Occasional (29-5%) HP:0002373
13 dementia 60 33 occasional (7.5%) Occasional (29-5%) HP:0000726
14 progressive cerebellar ataxia 60 33 occasional (7.5%) Occasional (29-5%) HP:0002073
15 cerebellar atrophy 60 33 occasional (7.5%) Occasional (29-5%) HP:0001272
16 aplasia/hypoplasia of the corpus callosum 60 33 occasional (7.5%) Occasional (29-5%) HP:0007370
17 cerebral atrophy 60 33 occasional (7.5%) Occasional (29-5%) HP:0002059
18 chin myoclonus 60 33 occasional (7.5%) Occasional (29-5%) HP:0012462
19 photomyoclonic seizures 60 33 occasional (7.5%) Occasional (29-5%) HP:0001327
20 limb myoclonus 60 33 occasional (7.5%) Occasional (29-5%) HP:0045084
21 visual loss 33 occasional (7.5%) HP:0000572
22 hypoplasia of the corpus callosum 33 occasional (7.5%) HP:0002079
23 generalized myoclonic seizures 33 HP:0002123
24 myoclonus 60 Frequent (79-30%)
25 truncal ataxia 33 HP:0002078
26 eeg with focal epileptiform discharges 60 Occasional (29-5%)
27 fingerprint intracellular accumulation of autofluorescent lipopigment storage material 33 HP:0003208

Symptoms via clinical synopsis from OMIM:

58
Neurologic Central Nervous System:
dysarthria
truncal ataxia
myoclonic seizures
mental retardation
cerebellar atrophy (in 1 family)
more
Head And Neck Head:
microcephaly (in 1 family)

Laboratory Abnormalities:
'fingerprint profiles' ultrastructurally in cells
granular osmiophilic cytoplasmic deposits ultrastructurally in cells
'rectilinear profiles' ultrastructurally in cells

Head And Neck Eyes:
visual loss (in 1 family)
optic atrophy, mild (in 1 patient)

Clinical features from OMIM:

611726

UMLS symptoms related to Epilepsy, Progressive Myoclonic, 3, with or Without Intracellular Inclusions:


ataxia, truncal, myoclonic seizures

Drugs & Therapeutics for Epilepsy, Progressive Myoclonic, 3, with or Without Intracellular...

Search Clinical Trials , NIH Clinical Center for Epilepsy, Progressive Myoclonic, 3, with or Without Intracellular Inclusions

Genetic Tests for Epilepsy, Progressive Myoclonic, 3, with or Without Intracellular...

Genetic tests related to Epilepsy, Progressive Myoclonic, 3, with or Without Intracellular Inclusions:

# Genetic test Affiliating Genes
1 Epilepsy, Progressive Myoclonic 3 30 KCTD7
2 Cln14 Disease 30

Anatomical Context for Epilepsy, Progressive Myoclonic, 3, with or Without Intracellular...

MalaCards organs/tissues related to Epilepsy, Progressive Myoclonic, 3, with or Without Intracellular Inclusions:

42
Skin, Eye

Publications for Epilepsy, Progressive Myoclonic, 3, with or Without Intracellular...

Articles related to Epilepsy, Progressive Myoclonic, 3, with or Without Intracellular Inclusions:

# Title Authors Year
1
Novel mutations consolidate KCTD7 as a progressive myoclonus epilepsy gene. ( 22693283 )
2012
2
Mutation of a potassium channel-related gene in progressive myoclonic epilepsy. ( 17455289 )
2007

Variations for Epilepsy, Progressive Myoclonic, 3, with or Without Intracellular...

UniProtKB/Swiss-Prot genetic disease variations for Epilepsy, Progressive Myoclonic, 3, with or Without Intracellular Inclusions:

76
# Symbol AA change Variation ID SNP ID
1 KCTD7 p.Arg94Trp VAR_068776 rs387907260
2 KCTD7 p.Leu108Met VAR_068777 rs387907263
3 KCTD7 p.Arg184Cys VAR_068779 rs387907246
4 KCTD7 p.Asn273Ile VAR_068780 rs387907261

ClinVar genetic disease variations for Epilepsy, Progressive Myoclonic, 3, with or Without Intracellular Inclusions:

6 (show top 50) (show all 105)
# Gene Variation Type Significance SNP ID Assembly Location
1 KCTD7 NM_153033.4(KCTD7): c.295C> T (p.Arg99Ter) single nucleotide variant Pathogenic rs267607199 GRCh37 Chromosome 7, 66098412: 66098412
2 KCTD7 NM_153033.4(KCTD7): c.295C> T (p.Arg99Ter) single nucleotide variant Pathogenic rs267607199 GRCh38 Chromosome 7, 66633425: 66633425
3 KCTD7 NM_153033.4(KCTD7): c.550C> T (p.Arg184Cys) single nucleotide variant Likely pathogenic rs387907246 GRCh37 Chromosome 7, 66103899: 66103899
4 KCTD7 NM_153033.4(KCTD7): c.550C> T (p.Arg184Cys) single nucleotide variant Likely pathogenic rs387907246 GRCh38 Chromosome 7, 66638912: 66638912
5 KCTD7 NM_153033.4(KCTD7): c.594delC (p.Ile199Serfs) deletion Pathogenic rs727502785 GRCh38 Chromosome 7, 66638956: 66638956
6 KCTD7 NM_153033.4(KCTD7): c.594delC (p.Ile199Serfs) deletion Pathogenic rs727502785 GRCh37 Chromosome 7, 66103943: 66103943
7 KCTD7 NM_153033.4(KCTD7): c.280C> T (p.Arg94Trp) single nucleotide variant Likely pathogenic rs387907260 GRCh37 Chromosome 7, 66098397: 66098397
8 KCTD7 NM_153033.4(KCTD7): c.280C> T (p.Arg94Trp) single nucleotide variant Likely pathogenic rs387907260 GRCh38 Chromosome 7, 66633410: 66633410
9 KCTD7 NM_153033.4(KCTD7): c.818A> T (p.Asn273Ile) single nucleotide variant Pathogenic rs387907261 GRCh37 Chromosome 7, 66104167: 66104167
10 KCTD7 NM_153033.4(KCTD7): c.818A> T (p.Asn273Ile) single nucleotide variant Pathogenic rs387907261 GRCh38 Chromosome 7, 66639180: 66639180
11 KCTD7 NM_153033.4(KCTD7): c.343G> T (p.Asp115Tyr) single nucleotide variant Pathogenic rs387907262 GRCh37 Chromosome 7, 66103268: 66103268
12 KCTD7 NM_153033.4(KCTD7): c.343G> T (p.Asp115Tyr) single nucleotide variant Pathogenic rs387907262 GRCh38 Chromosome 7, 66638281: 66638281
13 KCTD7 NM_153033.4(KCTD7): c.322C> A (p.Leu108Met) single nucleotide variant Pathogenic rs387907263 GRCh37 Chromosome 7, 66103247: 66103247
14 KCTD7 NM_153033.4(KCTD7): c.322C> A (p.Leu108Met) single nucleotide variant Pathogenic rs387907263 GRCh38 Chromosome 7, 66638260: 66638260
15 KCTD7 NM_153033.4(KCTD7): c.133C> T (p.Leu45=) single nucleotide variant Conflicting interpretations of pathogenicity rs587780370 GRCh37 Chromosome 7, 66094184: 66094184
16 KCTD7 NM_153033.4(KCTD7): c.133C> T (p.Leu45=) single nucleotide variant Conflicting interpretations of pathogenicity rs587780370 GRCh38 Chromosome 7, 66629197: 66629197
17 KCTD7 NM_153033.4(KCTD7): c.654C> T (p.Asp218=) single nucleotide variant Benign/Likely benign rs117194263 GRCh37 Chromosome 7, 66104003: 66104003
18 KCTD7 NM_153033.4(KCTD7): c.654C> T (p.Asp218=) single nucleotide variant Benign/Likely benign rs117194263 GRCh38 Chromosome 7, 66639016: 66639016
19 KCTD7 NM_153033.4(KCTD7): c.687T> C (p.Asp229=) single nucleotide variant Conflicting interpretations of pathogenicity rs372150992 GRCh37 Chromosome 7, 66104036: 66104036
20 KCTD7 NM_153033.4(KCTD7): c.687T> C (p.Asp229=) single nucleotide variant Conflicting interpretations of pathogenicity rs372150992 GRCh38 Chromosome 7, 66639049: 66639049
21 KCTD7 NM_153033.4(KCTD7): c.384G> A (p.Glu128=) single nucleotide variant Conflicting interpretations of pathogenicity rs145238250 GRCh37 Chromosome 7, 66103309: 66103309
22 KCTD7 NM_153033.4(KCTD7): c.384G> A (p.Glu128=) single nucleotide variant Conflicting interpretations of pathogenicity rs145238250 GRCh38 Chromosome 7, 66638322: 66638322
23 KCTD7 NM_153033.4(KCTD7): c.190A> G (p.Thr64Ala) single nucleotide variant Conflicting interpretations of pathogenicity rs201296399 GRCh37 Chromosome 7, 66098307: 66098307
24 KCTD7 NM_153033.4(KCTD7): c.190A> G (p.Thr64Ala) single nucleotide variant Conflicting interpretations of pathogenicity rs201296399 GRCh38 Chromosome 7, 66633320: 66633320
25 KCTD7 NM_153033.4(KCTD7): c.76G> T (p.Asp26Tyr) single nucleotide variant Uncertain significance rs371919994 GRCh37 Chromosome 7, 66094127: 66094127
26 KCTD7 NM_153033.4(KCTD7): c.76G> T (p.Asp26Tyr) single nucleotide variant Uncertain significance rs371919994 GRCh38 Chromosome 7, 66629140: 66629140
27 KCTD7 NM_153033.4(KCTD7): c.192A> G (p.Thr64=) single nucleotide variant Benign/Likely benign rs142526573 GRCh37 Chromosome 7, 66098309: 66098309
28 KCTD7 NM_153033.4(KCTD7): c.192A> G (p.Thr64=) single nucleotide variant Benign/Likely benign rs142526573 GRCh38 Chromosome 7, 66633322: 66633322
29 KCTD7 NM_153033.4(KCTD7): c.193C> T (p.Arg65Cys) single nucleotide variant Uncertain significance rs200321023 GRCh37 Chromosome 7, 66098310: 66098310
30 KCTD7 NM_153033.4(KCTD7): c.193C> T (p.Arg65Cys) single nucleotide variant Uncertain significance rs200321023 GRCh38 Chromosome 7, 66633323: 66633323
31 KCTD7 NM_153033.4(KCTD7): c.256T> C (p.Tyr86His) single nucleotide variant Uncertain significance rs149255570 GRCh37 Chromosome 7, 66098373: 66098373
32 KCTD7 NM_153033.4(KCTD7): c.256T> C (p.Tyr86His) single nucleotide variant Uncertain significance rs149255570 GRCh38 Chromosome 7, 66633386: 66633386
33 KCTD7 NM_153033.4(KCTD7): c.273C> T (p.Ser91=) single nucleotide variant Conflicting interpretations of pathogenicity rs139585796 GRCh38 Chromosome 7, 66633403: 66633403
34 KCTD7 NM_153033.4(KCTD7): c.273C> T (p.Ser91=) single nucleotide variant Conflicting interpretations of pathogenicity rs139585796 GRCh37 Chromosome 7, 66098390: 66098390
35 KCTD7 NM_153033.4(KCTD7): c.335G> A (p.Arg112His) single nucleotide variant Pathogenic/Likely pathogenic rs774026720 GRCh37 Chromosome 7, 66103260: 66103260
36 KCTD7 NM_153033.4(KCTD7): c.335G> A (p.Arg112His) single nucleotide variant Pathogenic/Likely pathogenic rs774026720 GRCh38 Chromosome 7, 66638273: 66638273
37 KCTD7 NM_153033.4(KCTD7): c.362G> T (p.Arg121Leu) single nucleotide variant Uncertain significance rs199624315 GRCh37 Chromosome 7, 66103287: 66103287
38 KCTD7 NM_153033.4(KCTD7): c.362G> T (p.Arg121Leu) single nucleotide variant Uncertain significance rs199624315 GRCh38 Chromosome 7, 66638300: 66638300
39 KCTD7 NM_153033.4(KCTD7): c.456G> A (p.Val152=) single nucleotide variant Conflicting interpretations of pathogenicity rs796052686 GRCh37 Chromosome 7, 66103381: 66103381
40 KCTD7 NM_153033.4(KCTD7): c.456G> A (p.Val152=) single nucleotide variant Conflicting interpretations of pathogenicity rs796052686 GRCh38 Chromosome 7, 66638394: 66638394
41 KCTD7 NM_153033.4(KCTD7): c.507G> C (p.Arg169=) single nucleotide variant Benign/Likely benign rs142379946 GRCh37 Chromosome 7, 66103856: 66103856
42 KCTD7 NM_153033.4(KCTD7): c.507G> C (p.Arg169=) single nucleotide variant Benign/Likely benign rs142379946 GRCh38 Chromosome 7, 66638869: 66638869
43 KCTD7 NM_153033.4(KCTD7): c.403G> A (p.Gly135Arg) single nucleotide variant Uncertain significance rs781725855 GRCh38 Chromosome 7, 66638341: 66638341
44 KCTD7 NM_153033.4(KCTD7): c.403G> A (p.Gly135Arg) single nucleotide variant Uncertain significance rs781725855 GRCh37 Chromosome 7, 66103328: 66103328
45 KCTD7 NM_153033.4(KCTD7): c.506G> A (p.Arg169Gln) single nucleotide variant Uncertain significance rs745917176 GRCh37 Chromosome 7, 66103855: 66103855
46 KCTD7 NM_153033.4(KCTD7): c.506G> A (p.Arg169Gln) single nucleotide variant Uncertain significance rs745917176 GRCh38 Chromosome 7, 66638868: 66638868
47 KCTD7 NC_000007.14: g.(?_66638253)_(66643229_?)dup duplication Uncertain significance GRCh38 Chromosome 7, 66638253: 66643229
48 KCTD7 NC_000007.14: g.(?_66638233)_(66640414_?)dup duplication Likely benign GRCh37 Chromosome 7, 66103220: 66105401
49 KCTD7 NC_000007.14: g.(?_66638233)_(66640414_?)dup duplication Likely benign GRCh38 Chromosome 7, 66638233: 66640414
50 KCTD7 NM_153033.4(KCTD7): c.534G> A (p.Ala178=) single nucleotide variant Likely benign rs773060529 GRCh38 Chromosome 7, 66638896: 66638896

Expression for Epilepsy, Progressive Myoclonic, 3, with or Without Intracellular...

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