Acute intermittent porphyria caused by defective splicing of porphobilinogen deaminase RNA: a synonymous codon mutation at -22 bp from the 5' splice site causes skipping of exon 3.

Abstract excerpt

Acute intermittent porphyria (AIP) results from mutations in the porphobilinogen deaminase (PBG) gene. Three of 14 randomly selected, unrelated patients with the cross reacting immunological material (CRIM) negative form of AIP were found to have previously undescribed RNA splicing defects. Defective splicing of exons 12 and 13 was caused by a C-->G transversion at position -3 of the 3' splice site of intron 11...

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