Communicated by Haig H. Kazazian, Jr.
Double complex mutations involving F8 and FUNDC2 caused by distinct break-induced replication†
Article first published online: 7 AUG 2007
© 2007 Wiley-Liss, Inc.
Volume 28, Issue 12, pages 1198–1206, December 2007
How to Cite
Sheen, C. R., Jewell, U. R., Morris, C. M., Brennan, S. O., Férec, C., George, P. M., Smith, M. P. and Chen, J.-M. (2007), Double complex mutations involving F8 and FUNDC2 caused by distinct break-induced replication. Hum. Mutat., 28: 1198–1206. doi: 10.1002/humu.20591
- Issue published online: 13 NOV 2007
- Article first published online: 7 AUG 2007
- Manuscript Accepted: 5 JUN 2007
- Manuscript Received: 5 APR 2007
- Bayer Haemophilia Awards Special Project Grant
- New Zealand Child Health Research Foundation
- Child Cancer Foundation
- Lottery Health Research
- break-induced replication;
- complex genomic rearrangement;
- Factor VIII;
- hemophilia A;
- serial replication slippage
Genomic rearrangements are a well-recognized cause of genetic disease and can be formed by a variety of mechanisms. We report a complex rearrangement causing severe hemophilia A, identified and further characterized using a range of PCR-based methods, and confirmed using array–comparative genomic hybridization (array-CGH). This rearrangement consists of a 15.5-kb deletion/16-bp insertion located 0.6 kb from a 28.1-kb deletion/263-kb insertion at Xq28 and is one of the most complex rearrangements described at a DNA sequence level. We propose that the rearrangement was generated by distinct but linked cellular responses to double strand breakage, namely break-induced replication (BIR) and a novel model of break-induced serial replication slippage (SRS). The copy number of several genes is affected by this rearrangement, with deletion of part of the Factor VIII gene (F8, causing hemophilia A) and the FUNDC2 gene, and duplication of the TMEM185A, HSFX1, MAGEA9, and MAGEA11 genes. As the patient exhibits no clinically detectable phenotype other than hemophilia A, it appears that the biological effects of the other genes involved are not dosage-dependent. This investigation has provided novel insights into processes of DNA repair including BIR and the first description of SRS during repair in a pathological context. Hum Mutat 28(12),1198–1206, 2007. © 2007 Wiley-Liss, Inc.