SCREENING FOR MUTATIONS IN EXON-4 OF THE LDL RECEPTOR GENE - IDENTIFICATION OF A NEW DELETION MUTATION

DNA from 14 unrelated New Zealand familial hypercholesterolaemia (FH) heterozygotes, originating from the United Kingdom, was screened for m utations in exon 4 of the low density Lipoprotein receptor (LDLR) gene . One patient was heterozygous for mutation D206E, which was initially identified in South Africa. The chromosomal background of this mutant allele was compatible with that described previously in Afrikaner and English patients, suggesting that this mutation originated in the Uni ted Kingdom. The 2bp deletion in codon 206 and mutations D154N and D20 0G, previously reported in English FH patients, were not detected in t his sample. In one of the patients, however, a new deletion of 7bp was identified after nucleotide 581 (or 582) in exon 4 of the LDLR gene.