Locus FAME7 RAPGEF2

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Disease

Name Familial adult myoclonic epilepsy type 7
Inheritance
Description
Cortical tremor, seizures with generalised motor (tonic-clonic) onset .
Prevalence
FAME overall is 1/35,000 in Japan. Repeat expansion found in individuals of East Asian ancestry .
Age of Onset Age of Onset(Typical)Years18  370  0
Typical: 20-33 ; Range: 18 - 37 .
HPO Terms
Association
Mendelian

Locus

Details
The locus structure is (TTTTA)exp(TTTCA)exp(TTTTA)n, where only the TTTCA is specific to affected individuals as a pathogenic insertion, . Pathogenic expansions range from 60 to thousands of repeats, . Interruptions seen: TATTA, TTTTTA .
Mechanism
GoF?
RNA toxicity hypothesized .
Detection
Year
2018
Location in Gene
Intron 14
Gene Strand

Alleles

Ref. Motif
TTTTA
Ranges BenignIntermediatePathogenicUnits0  00  060  2,200
Benign (ref.)
Benign (gene)
Pathogenic (ref.)
TTTCA
Pathogenic (gene)
ATTTC
Unknown (ref.)
TTTTT, TTATG
Unknown (gene)
TTTTT, ATGTT
Interruption (ref.)
Interruption (gene)

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
TTTCA repeat expansion causes familial cortical myoclonic tremor with epilepsy.
X X,Lei, Q,Liu, Q,Lu, Y,Huang, X Q,Zhou, H Y,Sun, L W,Wu, L Y,Cui, X,Zhang
European journal of neurology · 2018-11-30
pmid:30351492
3
Expansions of intronic TTTCA and TTTTA repeats in benign adult familial myoclonic epilepsy.
Hiroyuki,Ishiura, Koichiro,Doi, Jun,Mitsui, Jun,Yoshimura, Miho Kawabe,Matsukawa, Asao,Fujiyama, Yasuko,Toyoshima, Akiyoshi,Kakita, Hitoshi,Takahashi, Yutaka,Suzuki, Sumio,Sugano, Wei,Qu, Kazuki,Ichikawa, Hideaki,Yurino, Koichiro,Higasa, Shota,Shibata, Aki,Mitsue, Masaki,Tanaka, Yaeko,Ichikawa, Yuji,Takahashi, Hidetoshi,Date, Takashi,Matsukawa, Junko,Kanda, Fumiko Kusunoki,Nakamoto, Mana,Higashihara, Koji,Abe, Ryoko,Koike, Mutsuo,Sasagawa, Yasuko,Kuroha, Naoya,Hasegawa, Norio,Kanesawa, Takayuki,Kondo, Takefumi,Hitomi, Masayoshi,Tada, Hiroki,Takano, Yutaka,Saito, Kazuhiro,Sanpei, Osamu,Onodera, Masatoyo,Nishizawa, Masayuki,Nakamura, Takeshi,Yasuda, Yoshio,Sakiyama, Mieko,Otsuka, Akira,Ueki, Ken-Ichi,Kaida, Jun,Shimizu, Ritsuko,Hanajima, Toshihiro,Hayashi, Yasuo,Terao, Satomi,Inomata-Terada, Masashi,Hamada, Yuichiro,Shirota, Akatsuki,Kubota, Yoshikazu,Ugawa, Kishin,Koh, Yoshihisa,Takiyama, Natsumi,Ohsawa-Yoshida, Shoichi,Ishiura, Ryo,Yamasaki, Akira,Tamaoka, Hiroshi,Akiyama, Taisuke,Otsuki, Akira,Sano, Akio,Ikeda, Jun,Goto, Shinichi,Morishita, Shoji,Tsuji
Nature genetics · 2018-03-05
pmid:29507423
4
Comprehensive genetic diagnosis of tandem repeat expansion disorders with programmable targeted nanopore sequencing.
Igor,Stevanovski, Sanjog R,Chintalaphani, Hasindu,Gamaarachchi, James M,Ferguson, Sandy S,Pineda, Carolin K,Scriba, Michel,Tchan, Victor,Fung, Karl,Ng, Andrea,Cortese, Henry,Houlden, Carol,Dobson-Stone, Lauren,Fitzpatrick, Glenda,Halliday, Gianina,Ravenscroft, Mark R,Davis, Nigel G,Laing, Avi,Fellner, Marina,Kennerson, Kishore R,Kumar, Ira W,Deveson
Science advances · 2022-03-04
pmid:35245110

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)

Targeted nanopore long-read sequencing panel for the molecular diagnosis of intronic expansion in familial adult myoclonic epilepsy.
Haruka,Urabe, Takashi,Nakajima, Satomi,Mitsuhashi, Kentaro,Ohta, Hidehiko,Fujinaka, Kiyoe,Goto, Aki,Sato
BMC medical genomics · 2025-11-11
pmid:41219789
ATTCT and ATTCC repeat expansions in the ATXN10 gene affect disease penetrance of spinocerebellar ataxia type 10.
C Alejandra,Morato Torres, Faria,Zafar, Yu-Chih,Tsai, Jocelyn Palafox,Vazquez, Michael D,Gallagher, Ian,McLaughlin, Karl,Hong, Jill,Lai, Joyce,Lee, Amanda,Chirino-Perez, Angel Omar,Romero-Molina, Francisco,Torres, Juan,Fernandez-Ruiz, Tetsuo,Ashizawa, Janet,Ziegle, Francisco Javier,Jiménez Gil, Birgitt,Schüle
HGG advances · 2022-08-15
pmid:36092952
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
Intronic (TTTGA)
Zhidong,Cen, You,Chen, Dehao,Yang, Qingchen,Zhu, Si,Chen, Xinhui,Chen, Bo,Wang, Fei,Xie, Zhiyuan,Ouyang, Zhengwen,Jiang, Aisi,Fu, Ben,Hu, Houmin,Yin, Xia,Qiu, Feng,Yu, Xiaoping,Du, Weicheng,Hao, Yuxi,Liu, Haotian,Wang, Lebo,Wang, Xiafei,Yu, Yichuan,Xiao, Chunyu,Liu, Jianfeng,Xiao, Yongxing,Zhou, Wei,Yang, Baorong,Zhang, Wei,Luo
Movement disorders : official journal of the Movement Disorder Society · 2019-09-04
pmid:31483537