Mutations in autism susceptibility candidate 2 (AUTS2) in patients with mental retardation.
We report on three unrelated mentally disabled patients, each carrying a de novo balanced translocation that truncates the autism susceptibility candidate 2 (AUTS2) gene at 7q11.2. One of our patients shows relatively mild mental retardation; the other two display more profound disorders. One patient is also physically disabled, exhibiting urogenital and limb malformations in addition to severe mental retardation. The function of AUTS2 is presently unknown, but it has been shown to be disrupted in monozygotic twins with autism and mental retardation, both carrying a translocation t(7;20)(q11.2;p11.2) (de la Barra et al. in Rev Chil Pediatr 57:549-554, 1986; Sultana et al. in Genomics 80:129-134, 2002). Given the overlap of this autism/mental retardation (MR) phenotype and the MR-associated disorders in our patients, together with the fact that mapping of the additional autosomal breakpoints involved did not disclose obvious candidate disease genes, we ascertain with this study that AUTS2 mutations are clearly linked to autosomal dominant mental retardation.
Kalscheuer
Vera M
VM
Max-Planck-Institute for Molecular Genetics, Ihnestrasse 73, 14195, Berlin, Germany. kalscheu@molgen.mpg.de
FitzPatrick
David
D
Tommerup
Niels
N
Bugge
Merete
M
Niebuhr
Erik
E
Neumann
Luitgard M
LM
Tzschach
Andreas
A
Shoichet
Sarah A
SA
Menzel
Corinna
C
Erdogan
Fikret
F
Arkesteijn
Ger
G
Ropers
Hans-Hilger
HH
Ullmann
Reinhard
R
D000015:Abnormalities, Multiple / Q000235:genetics; D000328:Adult; D001321:Autistic Disorder / Q000235:genetics; D002648:Child; D019457:Chromosome Breakage; D002897:Chromosomes, Human, Pair 7; D005260:Female; D005799:Genes, Dominant; D006801:Humans; D008607:Intellectual Disability / Q000235:genetics*; D008297:Male; D009154:Mutation; D014178:Translocation, Genetic