Archives of Dermatological Research

, Volume 290, Issue 8, pp 441–445

The genetic basis of “Scarsdale Gourmet Diet” variegate porphyria: a missense mutation in the protoporphyrinogen oxidase gene

  • Jorge Frank
  • Maureen B. Poh-Fitzpatrick
  • Lloyd E. King Jr.
  • A. M. Christiano
Original paper

DOI: 10.1007/s004030050333

Cite this article as:
Frank, J., Poh-Fitzpatrick, M., King Jr., L. et al. Arch Dermatol Res (1998) 290: 441. doi:10.1007/s004030050333

Abstract The porphyrias are disorders of porphyrin or porphyrin-precursor metabolism that result from inherited or acquired aberrations in the control of the porphyrin-heme biosynthetic pathway. Variegate porphyria (VP), one of the acute hepatic porphyrias, is characterized by a partial reduction in the activity of protoporphyrinogen oxidase (PPO), and recently, mutations in the PPO gene on chromosome 1q22–23 have been described. Our purpose was to identify the underlying genetic lesion in a severely affected patient with VP and to detect the silent mutation carriers in her family. The disease in this patient was precipitated by carbohydrate restriction as outlined in the “Scarsdale Gourmet Diet”. Our mutation detection and confirmation strategy included PCR, automated sequencing, and restriction enzyme digestion. We identified a missense mutation in the patient and five family members. The mutation consisted of a previously unreported C-to-T transition in exon 5 of the PPO gene, resulting in the substitution of arginine by cysteine, designated R152C. This arginine residue is evolutionarily highly conserved in humans, mice, bacteria, yeast, and plants, indicating the importance of this residue in PPO. Our study established that a missense mutation in the PPO gene was the underlying mutation in this patient with VP and explained the occurrence of the phenotype in this family.

Key words Variegate porphyria Protoporphyrinogen oxidase Acute porphyria 

Copyright information

© Springer-Verlag Berlin Heidelberg 1998

Authors and Affiliations

  • Jorge Frank
    • 1
  • Maureen B. Poh-Fitzpatrick
    • 1
  • Lloyd E. King Jr.
    • 2
  • A. M. Christiano
    • 1
  1. 1.Department of Dermatology, Columbia University, College of Physicians and Surgeons, 630 West 168th Street, VC-1526, New York, New York, NY 10032, USA e-mail: amc65@columbia.edu Tel. +1-212-305-9565; Fax +1-212-305-7391US
  2. 2.Division of Dermatology, Vanderbilt University and VA Medical Center, Nashville, TN, USAUS

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