Rearrangement of 21-hydroxylase genes in disease-associated MHC supratypes

Michael J. Garlepp, Alan N. Wilton, R. L. Dawkins, Perrin C. White

Research output: Contribution to journalArticle

57 Scopus citations

Abstract

Human cDNA probes for 21-hydroxylase (21-OH) and for complement component C4 are used on restriction digests of the members of several families with interesting supratypes. The presence of two Taq I fragments of 3.7 kb and 3.2 kb in size with a 21-OH probe is confirmed in most individuals who show no evidence of C4 deletions or 21-OH deficiency. Most individuals also show a doublet of weakly hybridizing bands at approximately 2.5 kb, the smaller of which is part of the 21A gene. The arrangement of the 21-OH genes on disease-associated supratypes was examined, and it is shown that copies of the same supratype from unrelated individuals are usually identical. Evidence is provided for deletions of 21A on the B8, C$AQ0 C4B1, BfS, DR3 and B18, C4A3, C4BQ0, BjF1, DR3 supratypes and a duplication of 21A on the B14, C4A2, C4B1/B2, BfS supratype. Gene rearrangements may be relevant to diseases such as juvenile onset diabetes mellitus.

Original languageEnglish (US)
Pages (from-to)100-105
Number of pages6
JournalImmunogenetics
Volume23
Issue number2
DOIs
StatePublished - Feb 1 1986

ASJC Scopus subject areas

  • Immunology
  • Genetics

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