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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 

Inherited and de novo deletion of the tyrosine aminotransferase gene locus at 16q22.1----q22.3 in a patient with tyrosinemia type II.

Tyrosinemia II is an autosomal-recessively inherited condition caused by deficiency in the liver-specific enzyme tyrosine aminotransferase (TAT; EC 2.6.1.5). We have restudied a patient with typical symptoms of tyrosinemia II who in addition suffers from multiple congenital anomalies including severe mental retardation. Southern blot analysis using a human TAT cDNA probe revealed a complete deletion of both TAT alleles in the patient. Molecular and cytogenetic analysis of the patient and his family showed one deletion to be maternally inherited, extending over at least 27 kb and including the complete TAT structural gene, whereas loss of the second TAT allele results from a small de novo interstitial deletion, del 16 (pter----q22.1::q22.3----qter), in the paternally inherited chromosome 16. Three additional loci previously assigned to 16q22 were studied in our patient: haptoglobin ( HP), lecithin: cholesterol acyltransferase (LCAT), and the metallothionein gene cluster MT1,MT2. Of these three markers, only the HP locus was found to be codeleted with the TAT locus on the del(16) chromosome.[1]

References

  1. Inherited and de novo deletion of the tyrosine aminotransferase gene locus at 16q22.1----q22.3 in a patient with tyrosinemia type II. Natt, E., Westphal, E.M., Toth-Fejel, S.E., Magenis, R.E., Buist, N.R., Rettenmeier, R., Scherer, G. Hum. Genet. (1987) [Pubmed]
 
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