Cited by 143Genomic variations and chromosomal abnormalitiesChromosomal and Genetic VariationsGenome Rearrangement Algorithms

Interchromosomal duplications of the adrenoleukodystrophy locus: a phenomenon of pericentromeric plasticity

Eichler, E.·1997·Human Molecular Genetics

Abstract

A 9.7 kb segment encompassing exons 7-10 of the adrenoleukodystrophy (ALD) locus of the X chromosome has duplicated to specific locations near the pericentromeric regions of human chromosomes 2p11,10p11, 16p11 and 22q11. Comparative sequence analysis reveals 92-96% nucleotide identity, indicating that the autosomal ALD paralogs arose relatively recently during the course of higher primate evolution (5-10 million years ago). Analysis of sequences flanking the duplication region identifies the presence of an unusual GCTTTTTGC repeat which may be a sequence-specific integration site for the process of pericentromeric-directed transposition. The breakpoint sequence and phylogenetic analysis predict a two-step transposition model, in which a duplication from Xq28 to pericentromeric 2p11 occurred once, followed by a rapid distribution of a larger duplicon cassette among the pericentromeric regions. In addition to facilitating more effective mutation detection among ALD patients, these findings provide further insight into the molecular basis underlying a pericentromeric-directed mechanism for non-homologous interchromosomal exchange.

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Crossref · 10.1093/hmg/6.7.991

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  • Five different ABCD1 pseudogenes are assigned to chromosomal regions 2p11 (two copies), 10p11, 16p11, and 22q11.

    “While various pseudogenes were originally attributed to chromosomes 1, 2, 10, 16, 20, and 22 by polymerase chain reaction analysis of monochromosomal mapping panels and by the use of fluorescence in situ hybridization (FISH), five different pseudogenes are now assigned to chromosomal regions 2p11 (two copies), 10p11, 16p11, and 22q11.31,47”
  • The ABCD1 pseudogenes consist of exons 7-10 of the ABCD1 gene and are derived from one ancestral duplication, probably to chromosome 2, followed by further duplications.

    “These all consist of exons 7–10 of the ABCD1 gene and are derived from one ancestral duplication, probably to chromosome 2, which was followed by further duplications in a process termed pericentromeric plasticity.47”

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Authors
Eichler, E.
Affiliations
Lawrence Livermore National Laboratory (US)
Corresponding author
Eichler, E.
Venue
Human Molecular Genetics
Published
1997-07-01
Volume
6
Issue
7
Pages
991-1002
ISSN
  • 0964-6906 (ISSN-L)
  • 1460-2083
OpenAlex
W2125094037
Cited by
143
References
43
Citations by year
2025: 2 · 2024: 1 · 2022: 1 · 2021: 4 · 2020: 1 · 2019: 1 · 2018: 1 · 2017: 4 · 2015: 1 · 2013: 3 · 2012: 1
FWCI
9.38
Type
journal article
Language
en
Open access
closed
Locations
  • Human Molecular Genetics (publishedVersion)
  • PubMed (publishedVersion)
  • HighWire Press Open Archive (submittedVersion)
  • CINECA IRIS Institutional Research Information System (University of Bari Aldo Moro) (submittedVersion)
Funders
  • National Institute on Deafness and Other Communication Disorders (P01DC002027, DC02027)
  • National Institute of General Medical Sciences
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genomic variations and chromosomal abnormalities
  • Life Sciences › Agricultural and Biological Sciences › Plant Science › Chromosomal and Genetic Variations
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genome Rearrangement Algorithms
Keywords
adrenoleukodystrophy, transposable elements, duplicons, X chromosome, chromosome 22q11, nonhomologous recombination, primate evolution, phylogenetic analysis
MeSH terms
Adrenoleukodystrophy, Amino Acid Sequence, Base Sequence, Centromere, Chromosome Mapping, Chromosomes, Human, Biological Evolution, Humans, Male, Molecular Sequence Data, Phylogeny, Repetitive Sequences, Nucleic Acid, X Chromosome, Sequence Homology, Amino Acid, Sequence Analysis, Chromosome Breakage

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