Exon-Alu recombination deletes 5 kilobases from the low density lipoprotein receptor gene, producing a null phenotype in familial hypercholesterolemia

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Abstract

Among patients with familial hypercholesterolemia, half of the mutant alleles at the low density lipoprotein (LDL) receptor locus produce no immunologically detectable protein. To determine the molecular basis for one such null allele, we have cloned an abnormally short restriction fragment from the genomic DNA of one patient. The DNA sequence revealed a 5-kilobase deletion that joins a coding sequence in exon 13 to an Alu reptitive element in intron 15. The deletion joint is flanked by two inverted repeats that could potentially form a double stem-loop structure that might have predisposed to this deletion. A similar double stem-loop structure can be drawn for a previously described deletion in the LDL receptor gene and for a deletion in the β-globin gene cluster. We speculate that such double stem-loop structures might contribute to the formation of large deletions in the human genome.

Original languageEnglish (US)
Pages (from-to)3679-3683
Number of pages5
JournalProceedings of the National Academy of Sciences of the United States of America
Volume83
Issue number11
StatePublished - 1986

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Hyperlipoproteinemia Type II
LDL Receptors
Genetic Recombination
Exons
Alleles
Alu Elements
Phenotype
Globins
Gene Deletion
Human Genome
Multigene Family
Introns
Genes
Joints
DNA
Proteins

ASJC Scopus subject areas

  • General
  • Genetics

Cite this

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title = "Exon-Alu recombination deletes 5 kilobases from the low density lipoprotein receptor gene, producing a null phenotype in familial hypercholesterolemia",
abstract = "Among patients with familial hypercholesterolemia, half of the mutant alleles at the low density lipoprotein (LDL) receptor locus produce no immunologically detectable protein. To determine the molecular basis for one such null allele, we have cloned an abnormally short restriction fragment from the genomic DNA of one patient. The DNA sequence revealed a 5-kilobase deletion that joins a coding sequence in exon 13 to an Alu reptitive element in intron 15. The deletion joint is flanked by two inverted repeats that could potentially form a double stem-loop structure that might have predisposed to this deletion. A similar double stem-loop structure can be drawn for a previously described deletion in the LDL receptor gene and for a deletion in the β-globin gene cluster. We speculate that such double stem-loop structures might contribute to the formation of large deletions in the human genome.",
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T1 - Exon-Alu recombination deletes 5 kilobases from the low density lipoprotein receptor gene, producing a null phenotype in familial hypercholesterolemia

AU - Lehrman, M. A.

AU - Russell, D. W.

AU - Goldstein, J. L.

AU - Brown, M. S.

PY - 1986

Y1 - 1986

N2 - Among patients with familial hypercholesterolemia, half of the mutant alleles at the low density lipoprotein (LDL) receptor locus produce no immunologically detectable protein. To determine the molecular basis for one such null allele, we have cloned an abnormally short restriction fragment from the genomic DNA of one patient. The DNA sequence revealed a 5-kilobase deletion that joins a coding sequence in exon 13 to an Alu reptitive element in intron 15. The deletion joint is flanked by two inverted repeats that could potentially form a double stem-loop structure that might have predisposed to this deletion. A similar double stem-loop structure can be drawn for a previously described deletion in the LDL receptor gene and for a deletion in the β-globin gene cluster. We speculate that such double stem-loop structures might contribute to the formation of large deletions in the human genome.

AB - Among patients with familial hypercholesterolemia, half of the mutant alleles at the low density lipoprotein (LDL) receptor locus produce no immunologically detectable protein. To determine the molecular basis for one such null allele, we have cloned an abnormally short restriction fragment from the genomic DNA of one patient. The DNA sequence revealed a 5-kilobase deletion that joins a coding sequence in exon 13 to an Alu reptitive element in intron 15. The deletion joint is flanked by two inverted repeats that could potentially form a double stem-loop structure that might have predisposed to this deletion. A similar double stem-loop structure can be drawn for a previously described deletion in the LDL receptor gene and for a deletion in the β-globin gene cluster. We speculate that such double stem-loop structures might contribute to the formation of large deletions in the human genome.

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