Clinical and molecular studies of patients with characteristics of Opitz G/BBB syndrome shows a novel MID1 mutation.
Opitz G/BBB syndrome is characterized by midline abnormalities such as hypertelorism, cleft palate, and hypospadias. This syndrome is heterogeneous with an X-linked recessive form caused by mutations in the MID1 gene at band Xp22.3. However, mutations in MID1 have only been identified in 47% of familial cases of X-linked Opitz G/BBB syndrome, and 13% of sporadic cases. We performed a phenotype-genotype analysis of a group of nine new patients with clinical characteristics commonly seen in Opitz G/BBB syndrome, and of previously reported patients. We identified a novel mutation in exon 9 of the MID1 gene, c.1941insTGAGTCATCATCC, leading to a premature termination codon at amino acid 514 in a patient with hypertelorism, apparently low-set ears, a short philtrum, bilateral cleft of lip and palate and hypospadias. This mutation affects the PRY domain of the C-terminus of the MID1 protein.
Hsieh
Elena W Y
EW
Department of Pediatrics, Division of Genetics, UCSF School of Medicine, San Francisco, California 94143-0748, USA.
Vargervik
Karin
K
Slavotinek
Anne M
AM
D000015:Abnormalities, Multiple / Q000235:genetics*; D001483:Base Sequence; D002648:Child; D002675:Child, Preschool; D002971:Cleft Lip / Q000235:genetics*; D002972:Cleft Palate / Q000235:genetics*; D018389:Codon, Nonsense / Q000235:genetics; D004252:DNA Mutational Analysis; D005260:Female; D005838:Genotype; D006801:Humans; D006972:Hypertelorism / Q000235:genetics*; D007021:Hypospadias / Q000235:genetics*; D007223:Infant; D008297:Male; D008868:Microtubule Proteins / Q000235:genetics*; D009687:Nuclear Proteins / Q000235:genetics*; D020411:Oligonucleotide Array Sequence Analysis; D010641:Phenotype; D013577:Syndrome; D014157:Transcription Factors / Q000235:genetics*; D044767:Ubiquitin-Protein Ligases
D018389:Codon, Nonsense; D008868:Microtubule Proteins; D009687:Nuclear Proteins; D014157:Transcription Factors; C109052:MID1 protein, human; D044767:Ubiquitin-Protein Ligases