FAME1 SAMD12

Disease ID
FAME1
Gene ID
SAMD12
Updated
Jan 23, 2026
v2.14.0
Suggest Edit

Disease

Name
Familial adult myoclonic epilepsy type 1
Inheritance
Autosomal dominant
Description
Cortical tremor, seizures with generalised motor (tonic-clonic) onset1 ; Adult-onset cortical myoclonus, with seizures in up to a half of patients2 .
Prevalence
FAME overall is 1/35,000 in Japan. Typically found in individuals of East Asian ancestry1 .
Age of Onset(Typical)Years8  6821  39
Age of Onset Details
Typical: 21-393 ; Range: 84 - 685 .

Locus

Details
Novel, pathogenic alleles include expansions of TTTTAn + TTTCAn, but only the TTTCA insertion is specific to affected individuals and associated with symptom age of onset6 ; pathogenic expansions range from 105 to 3860 repeats7,5
Mechanism
GoF?
RNA mediated gain of function proposed7,8 .
Year
20185
Location in Gene
Intron 4/4
Gene Strand

Alleles

Ref. Motif
TAAAA
Pathogenic (ref.)
TGAAA
Pathogenic (gene)
ATTTC
Unknown (ref.)
AAAAA, TAAAC, TAACA, TACAA, TACAC
Unknown (gene)
TTTTT, AGTTT, ATGTT, ATTGT, AGTGT
PathogenicUnits105  3,680

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 · 2025-05-15
pmid:39349043
3
Intronic pentanucleotide TTTCA repeat insertion in the SAMD12 gene causes familial cortical myoclonic tremor with epilepsy type 1.
Zhidong,Cen, Zhengwen,Jiang, You,Chen, Xiaosheng,Zheng, Fei,Xie, Xiaodong,Yang, Xingjiao,Lu, Zhiyuan,Ouyang, Hongwei,Wu, Si,Chen, Houmin,Yin, Xia,Qiu, Shuang,Wang, Meiping,Ding, Yelei,Tang, Feng,Yu, Caihua,Li, Tao,Wang, Hiroyuki,Ishiura, Shoji,Tsuji, Chuan,Jiao, Chunyu,Liu, Jianfeng,Xiao, Wei,Luo
Brain : a journal of neurology · 2018-08-01
pmid:29939203
4
Phenotypic and genotypic characterization of familial adult myoclonus epilepsy in a Chinese case series.
Sheng,Zeng, Yao,Zhou, Yuwen,Zhao, Mingqiang,Li, Chaojun,Zhou, Xuejing,Wang, Hui,Quan, Tiandong,Che, Jinchen,Li, Qiying,Sun, Beisha,Tang
Brain communications · 2025-06-04
pmid:40503331
5
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
6
(TTTCA)exp Drives the Genotype-Phenotype Correlation and Genetic Anticipation in FCMTE1.
Xinhui,Chen, Bo,Wang, Haibin,Xia, Haotian,Wang, Dehao,Yang, Miao,Chen, Huijun,Yu, Fan,Zhang, Yixin,Kang, Yiling,Chen, Nan,Jin, Lebo,Wang, Peng,Liu, Fei,Xie, Aisi,Fu, Ben,Hu, Zhiyuan,Ouyang, Sheng,Wu, Yao,Ding, Junfeng,Ji, Shuang,Wang, Wei,Luo, Zhidong,Cen
Movement disorders : official journal of the Movement Disorder Society · 2024-11-21
pmid:39569876
8
Sequence composition changes in short tandem repeats: heterogeneity, detection, mechanisms and clinical implications.
Indhu-Shree,Rajan-Babu, Egor,Dolzhenko, Michael A,Eberle, Jan M,Friedman
Nature reviews. Genetics · 2024-03-11
pmid:38467784

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)

The role of disease-associated short tandem repeats in amyotrophic lateral sclerosis.
Joke J F A,van Vugt, Ramona A J,Zwamborn, Egor,Dolzhenko, Michael A,Eberle, Ben,Weisburd, Erwin,Bekema, Maarten,Kooyman, Bi-Nan,Wang, Erik-Jan,Kamsteeg, Monique,Losekoot, Frank,Baas, Camilla,Novy, Helle,Høyer, Ruben P A,van Eijk, Michael A,van Es, Wouter,van Rheenen, Ammar,Al-Chalabi, Leonard H,van den Berg, Jan H,Veldink
Brain communications · 2025-12-09
pmid:41426430
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
Tremor-associated short tandem repeat intermediate and pathogenic expansions in familial essential tremor.
Xun,Zhou, Runcheng,He, Sheng,Zeng, Mingqiang,Li, Hongxu,Pan, Yuwen,Zhao, Zhenhua,Liu, Qian,Xu, Jifeng,Guo, Xinxiang,Yan, Jinchen,Li, Beisha,Tang, Qiying,Sun
Brain communications · 2024-06-29
pmid:38961870
Origin and evolution of pentanucleotide repeat expansions at the familial cortical myoclonic tremor with epilepsy type1 - SAMD12 locus.
Xinhui,Chen, Fan,Zhang, Yihua,Shi, Haotian,Wang, Miao,Chen, Dehao,Yang, Lebo,Wang, Peng,Liu, Fei,Xie, Jiawen,Chen, Aisi,Fu, Ben,Hu, Bo,Wang, Zhiyuan,Ouyang, Sheng,Wu, Zhiru,Lin, Zhidong,Cen, Wei,Luo
European journal of human genetics : EJHG · 2024-03-12
pmid:38467733
Seizures and electrophysiological features in familial cortical myoclonic tremor with epilepsy 1.
Yao,Ding, Zhidong,Cen, Yang,Zheng, Xia,Qiu, Yumao,Ye, Xinhui,Chen, Lingli,Hu, Bo,Wang, Zhongjin,Wang, Houmin,Yin, Chunhong,Shen, Wenjie,Ming, Yi,Ge, Fei,Xie, Dehao,Yang, Zhiyuan,Ouyang, Haotian,Wang, Sheng,Wu, Meiping,Ding, Shuang,Wang, Wei,Luo
Annals of clinical and translational neurology · 2023-12-07
pmid:38059543
Complete SAMD12 repeat expansion sequencing in a four-generation BAFME1 family with anticipation.
Takeshi,Mizuguchi, Tomoko,Toyota, Eriko,Koshimizu, Shinichi,Kameyama, Hiromi,Fukuda, Naomi,Tsuchida, Yuri,Uchiyama, Kohei,Hamanaka, Atsushi,Fujita, Kazuharu,Misawa, Satoko,Miyatake, Hiroaki,Adachi, Naomichi,Matsumoto
Journal of human genetics · 2023-08-18
pmid:37592133
A novel FAME1 repeat configuration in a European family identified using a combined genomics approach.
Tatiana,Maroilley, Meng-Han,Tsai, Rumika,Mascarenhas, Catherine,Diao, Maryam,Khanbabaei, Sabine,Kaya, Christel,Depienne, Maja,Tarailo-Graovac, Karl Martin,Klein
Epilepsia open · 2023-02-16
pmid:36740228
Insights into familial adult myoclonus epilepsy pathogenesis: How the same repeat expansion in six unrelated genes may lead to cortical excitability.
Christel,Depienne, Arn M J M,van den Maagdenberg, Theresa,Kühnel, Hiroyuki,Ishiura, Mark A,Corbett, Shoji,Tsuji
Epilepsia · 2023-01-22
pmid:36622139
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