Mutant chromatin remodeling protein SMARCAL1 causes Schimke immuno-osseous dysplasia

Cornelius F. Boerkoel, Hiroshi Takashima, Joy John, Jiong Yan, Pawel Stankiewicz, Lisa Rosenbarker, Jean Luc André, Radovan Bogdanovic, Antoine Burguet, Sandra Cockfield, Isabel Cordeiro, Stefan Fründ, Friederike Illies, Mark Joseph, Ilkka Kaitila, Giuliana Lama, Chantal Loirat, D. Ross McLeod, David V. Milford, Elizabeth M. PettyFrancisco Rodrigo, Jorge M. Saraiva, Beate Schmidt, Graham C. Smith, Jürgen Spranger, Anja Stein, Hannelore Thiele, Jane Tizard, Rosanna Weksberg, James R. Lupski, David W. Stockton

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274 Scopus citations


Schimke immuno-osseous dysplasia (SIOD, MIM 242900) is an autosomal-recessive pleiotropic disorder with the diagnostic features of spondyloepiphyseal dysplasia, renal dysfunction and T-cell immunodeficiency1-3. Using genome-wide linkage mapping and a positional candidate approach, we determined that mutations in SMARCAL1 (SWI/SNF2-related, matrix-associated, actin-dependent regulator of chromatin, subfamily a-like 1), are responsible for SIOD. Through analysis of data from persons with SIOD in 26 unrelated families, we observed that affected individuals from 13 of 23 families with severe disease had two alleles with nonsense, frameshift or splicing mutations, whereas affected individuals from 3 of 3 families with milder disease had a missense mutation on each allele. These observations indicate that some missense mutations allow retention of partial SMAR- CAL1 function and thus cause milder disease.

Original languageEnglish
Pages (from-to)215-220
Number of pages6
JournalNature Genetics
Issue number2
StatePublished - Feb 2002


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