Phenylalanine hydroxylase gene mutations in phenylketonuria patients from India: identification of novel mutations that affect PAH RNA.
Mol Genet Metab 2010;
100:96-9. [PMID:
20188615 DOI:
10.1016/j.ymgme.2010.01.016]
[Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/31/2009] [Revised: 01/27/2010] [Accepted: 01/27/2010] [Indexed: 11/20/2022]
Abstract
Analysis of seven Indian phenylketonuria families has revealed four novel mutations in the phenylalanine hydroxylase gene; two affected consensus splice sequence and the 3' UTR, respectively, while the other two were single base insertion and deletion mutations, respectively. A novel 3' splice site mutation c.168-2A>G resulted in the activation of a cryptic 3' splice site that generated a premature termination codon leading to very low levels of the mutant transcript, probably due to activation of the nonsense-mediated decay (NMD) pathway. This is probably the first report of PKU caused by the activation of NMD.
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