The Lafora Database

NAR Molecular Biology Database Collection entry number 753
Zhang J., MacDonald J.R., Khaja R., Duggan G., Ianzano L., Chan E.M., Lohi H., Minassian B.A. and Scherer SW.
Program in Genetics and Genomic Biology, The Hospital for Sick Children, 555 University Ave, Toronto ON Canada M5G 1X8.

Database Description

A curated database of mutations and polymorphisms associated with Lafora Progressive Myoclonus Epilepsy. The Lafora progressive myoclonus epilepsy mutation and polymorphism database is a collection of hand curated mutation and polymorphism data for the EPM2A and EPM2B (NHLRC1) from publicly available literature: databases and unpublished data. The database is continuously updated with information from in-house experimental data as well as data from published research studies. Submissions are also welcome.

Recent Developments

Keyword search and simple graphical interfaces allow users to query the database by gene and exon of interest.


We thank The Centre for Applied Genomics at the Hospital for Sick Children (HSC) as well as collaborators worldwide. Supported by Genome Canada, the Canadian Institutes of Health Research, the Howard Hughes Medical Institute International Scholar Program (to S.W.S.) and the HSC Foundation.


1. Ianzano L, Young EJ, Zhao XC, Chan EM, Rodriguez MT, Torrado MV, Scherer SW, Minassian BA. Loss of function of the cytoplasmic isoform of the protein laforin (EPM2A) causes Lafora progressive myoclonus epilepsy. Hum Mutat. 2004 Feb;23(2):170-6.
2. Chan EM, Young EJ, Ianzano L, Munteanu I, Zhao X, Christopoulos CC, Avanzini G, Elia M, Ackerley CA, Jovic NJ, Bohlega S, Andermann E, Rouleau GA, Delgado-Escueta AV, Minassian BA, Scherer SW. Mutations in NHLRC1 cause progressive myoclonus epilepsy. Nat Genet. 2003 Oct;35(2):125-7. Epub 2003 Sep 07.
3. Ganesh S, Delgado-Escueta AV, Suzuki T, Francheschetti S, Riggio C, Avanzini G, Rabinowicz A, Bohlega S, Bailey J, Alonso ME, Rasmussen A, Thomson AE, Ochoa A, Prado AJ, Medina MT, Yamakawa K. Genotype-phenotype correlations for EPM2A mutations in Lafora's progressive myoclonus epilepsy: exon 1 mutations associate with an early-onset cognitive deficit subphenotype. Hum Mol Genet. 2002 May 15;11(11):1263-71.
4. Gomez-Garre P, Sanz Y, Rodriguez De Cordoba SR, Serratosa JM. Mutational spectrum of the EPM2A gene in progressive myoclonus epilepsy of Lafora: high degree of allelic heterogeneity and prevalence of deletions. Eur J Hum Genet. 2000 Dec;8(12):946-54.
5. Minassian BA, Ianzano L, Meloche M, Andermann E, Rouleau GA, Delgado-Escueta AV, Scherer SW. Mutation spectrum and predicted function of laforin in Lafora's progressive myoclonus epilepsy.Neurology. 2000 Aug 8;55(3):341-6.

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