FAME3 MARCHF6

Disease ID
FAME3
Gene ID
MARCHF6

Disease

Name
Familial adult myoclonic epilepsy type 3
Inheritance
Autosomal dominant
Description
Cortical tremor, seizures with generalised motor (tonic-clonic) onset1 ; Adult-onset cortical tremor with epilepsy2 .
Prevalence
Overall FAME prevalence is < 1/35,000; MARCHF6-caused much smaller. Most cases have European ancestry1 .
Age of OnsetYears10  46
Age of Onset Details
Typical: 24-41 based on one 76 member pedigree3 ; Range: 104 - 465 .

Locus

Details
Healthy controls do not have pathogenic allele (TTTCA), but do have 9-20 benign motifs (TTTTA)6 . Alleles from six probands spanned from 791-1035 repeats; an inverse relationship between allele size and age of onset was noted5 .
Mechanism
Unknown
Noted as unknown in literature4 .
Year
20195
Location in Gene
Intron 1
Gene Strand

Alleles

Ref. Motif
TTTTA
Pathogenic (ref.)
TTTCA
Pathogenic (gene)
ATTTC
Unknown (ref.)
ATGTT, TAGTT, TTTTG, TTTTT
Unknown (gene)
ATGTT, AGTTT, GTTTT, TTTTT
PathogenicUnits791  1,035

gnomAD

References

Direct supporting references for info on this page.

1
Neurological disorders caused by novel non-coding repeat expansions: clinical features and differential diagnosis.
Elisa,Vegezzi, Hiroyuki,Ishiura, D Cristopher,Bragg, David,Pellerin, Francesca,Magrinelli, Riccardo,Currò, Stefano,Facchini, Arianna,Tucci, John,Hardy, Nutan,Sharma, Matt C,Danzi, Stephan,Zuchner, Bernard,Brais, Mary M,Reilly, Shoji,Tsuji, Henry,Houlden, Andrea,Cortese
The Lancet. Neurology · 2024-07-01
pmid:38876750
2
Repeat expansion disorders.
Zhongbo,Chen, Huw R,Morris, James,Polke, Nicholas W,Wood, Sonia,Gandhi, Mina,Ryten, Henry,Houlden, Arianna,Tucci
Practical neurology · 2024-09-30
pmid:39349043
3
Familial cortical myoclonic tremor with epilepsy (FCMTE): Clinical characteristics and exclusion of linkages to 8q and 2p in a large French family.
E,Magnin, M,Vidailhet, C,Depienne, C,Saint-Martin, D,Bouteiller, E,LeGuern, E,Apartis, L,Rumbach, P,Labauge
Revue neurologique · 2009-07-18
pmid:19616813
5
Unstable TTTTA/TTTCA expansions in MARCH6 are associated with Familial Adult Myoclonic Epilepsy type 3.
Rahel T,Florian, Florian,Kraft, Elsa,Leitão, Sabine,Kaya, Stephan,Klebe, Eloi,Magnin, Anne-Fleur,van Rootselaar, Julien,Buratti, Theresa,Kühnel, Christopher,Schröder, Sebastian,Giesselmann, Nikolai,Tschernoster, Janine,Altmueller, Anaide,Lamiral, Boris,Keren, Caroline,Nava, Delphine,Bouteiller, Sylvie,Forlani, Ludmila,Jornea, Regina,Kubica, Tao,Ye, Damien,Plassard, Bernard,Jost, Vincent,Meyer, Jean-François,Deleuze, Yannick,Delpu, Mario D M,Avarello, Lisanne S,Vijfhuizen, Gabrielle,Rudolf, Edouard,Hirsch, Thessa,Kroes, Philipp S,Reif, Felix,Rosenow, Christos,Ganos, Marie,Vidailhet, Lionel,Thivard, Alexandre,Mathieu, Thomas,Bourgeron, Ingo,Kurth, Haloom,Rafehi, Laura,Steenpass, Bernhard,Horsthemke, Eric,LeGuern, Karl Martin,Klein, Pierre,Labauge, Mark F,Bennett, Melanie,Bahlo, Jozef,Gecz, Mark A,Corbett, Marina A J,Tijssen, Arn M J M,van den Maagdenberg, Christel,Depienne
Nature communications · 2019-10-29
pmid:31664039
6
Resources for Genetics Professionals — Genetic Disorders Caused by Nucleotide Repeat Expansions and Contractions
Stephanie E.,Wallace, Lora JH,Bean
GeneReviews® [Internet] · 2022-10-20
genereviews:NBK535148

Additional Literature

Additional literature related to this locus.

Raw PubMed search results
(All PubMed results returned by searching for this gene, tandem repeats, and disease, in medline format)

DNA analysis of benign adult familial myoclonic epilepsy reveals associations between the pathogenic TTTCA repeat insertion in SAMD12 and the nonpathogenic TTTTA repeat expansion in TNRC6A.
Akane,Terasaki, Masayuki,Nakamura, Yuka,Urata, Hanae,Hiwatashi, Izumi,Yokoyama, Takeshi,Yasuda, Teiichi,Onuma, Kazumaru,Wada, Sunao,Kaneko, Rumiko,Kan, Shin-Ichi,Niwa, Ohiko,Hashimoto, Osamu,Komure, Yu-Ichi,Goto, Yuko,Yamagishi, Misa,Nakano, Yoshihiko,Furusawa, Akira,Sano
Journal of human genetics · 2020-10-10
pmid:33040085