Su, Peiqiang, Wang, Ye, Cooper, David Neil ORCID: https://orcid.org/0000-0002-8943-8484, Zhu, Wenjuan, Huang, Dongsheng, Férec, Claude, Wang, Yiming and Chen, Jian-Min 2015. Disclosing the hidden structure and underlying mutational mechanism of a novel type of duplication CNV responsible for hereditary multiple osteochondromas. Human Mutation 36 (8) , pp. 758-763. 10.1002/humu.22815 |
Abstract
The additional mutational complexity associated with copy number variation (CNV) can provide important clues as to the underlying mechanisms of CNV formation. Correct annotation of the additional mutational complexity is, however, a prerequisite for establishing the mutational mechanism. We illustrate this point through the characterization of a novel ∼230 kb EXT1 duplication CNV causing autosomal dominant hereditary multiple osteochondromas. Whole-genome sequencing initially identified the CNV as having a 22-bp insertion at the breakpoint junction and, unprecedentedly, multiple breakpoint-flanking micromutations on both sides of the duplication. Further investigation revealed that this genomic rearrangement had a duplication-inverted triplication–duplication structure, the inverted triplication being a 41-bp sequence synthesized from a nearby template. This permitted the identification of the sequence determinants of both the initiation (an inverted Alu repeat) and termination (a triplex-forming sequence) of break-induced replication and suggested a possible model for the repair of replication-associated double-strand breaks.
Item Type: | Article |
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Date Type: | Publication |
Status: | Published |
Schools: | Medicine |
Subjects: | Q Science > QH Natural history > QH426 Genetics |
Uncontrolled Keywords: | Alu-mediated recombination;break-induced replication;hereditary multiple osteochondromas;whole-genome sequencing |
Publisher: | Wiley-Blackwell |
ISSN: | 1059-7794 |
Date of Acceptance: | 1 May 2015 |
Last Modified: | 31 Oct 2022 10:13 |
URI: | https://orca.cardiff.ac.uk/id/eprint/84073 |
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