The world's first wiki where authorship really matters (Nature Genetics, 2008). Due credit and reputation for authors. Imagine a global collaborative knowledge base for original thoughts. Search thousands of articles and collaborate with scientists around the globe.

wikigene or wiki gene protein drug chemical gene disease author authorship tracking collaborative publishing evolutionary knowledge reputation system wiki2.0 global collaboration genes proteins drugs chemicals diseases compound
Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Mild elevation of N-acetylaspartic acid and macrocephaly: diagnostic problem.

Patients with slightly increased excretion of N-acetylaspartic acid in urine, together with macrocephaly, present a dignostic dilemma for Canavan's disease. We describe a 13-year-old male patient with macrocephaly, mild developmental delay, increased signal intensity in the basal ganglia bilaterally, partial cortical blindness, and retinitis pigmentosa. Although the clinical course and magnetic resonance imaging findings did not resemble typical Canavan's disease, N-acetylaspartic acid excretion in the patient's urine was slightly elevated, 99.90 +/- 4.00 microg/mg creatinine, whereas the normal control range was < 83 microg/mg creatinine. Cultured skin fibroblasts from the patient showed no aspartoacylase activity. Cloning of genomic DNA isolated from the patient's fibroblasts showed an intronic mutation, specifically deletion of -2A and -3C at the acceptor site of exon 3 and disrupting the normal splicing of the gene. A second mutation was found in exon 6, 863 A-->G in aspartoacylase complementary DNA, causing a tyrosine-to-cysteine (Y288C) amino acid substitution. Expression of the mutation on exon 6 showed normal aspartoacylase activity. These data suggest that expression of the mutation may help to understand the enzyme defect in a patient with slightly increased N-acetylaspartic acid excretion.[1]


  1. Mild elevation of N-acetylaspartic acid and macrocephaly: diagnostic problem. Surendran, S., Bamforth, F.J., Chan, A., Tyring, S.K., Goodman, S.I., Matalon, R. J. Child Neurol. (2003) [Pubmed]
WikiGenes - Universities