A Line 1 insertion in the Factor IX gene segregates with mild hemophilia B in dogs

A Line 1 insertion in the Factor IX gene segregates with mild hemophilia B in dogs We undertook the biochemical and molecular characterization of hemophilia in a large pedigree of German wirehaired pointers. Males affected with hemophilia B had approximately 5% normal Factor IX coagulant activity and a proportional reduction of Factor IX protein concentration, indicative of a mild hemophilia B phenotype. Using Southern blot analyses and PCR amplification of genomic DNA, we discovered a large, 1.5-kb insertion in intron 5 of the Factor IX gene of an affected male. The insert consists of a 5′ truncated canine Line-1 followed by an approximately 200-bp 3′ poly (A) tract, flanked by a 15-bp direct repeat. The insert can be traced through at least five generations and segregates with the hemophilia B phenotype in this breed. This is the first description of a Factor IX mutation associated with mild hemophilia B in a non-human species and provides evidence for a recent Line-1 insertion event in the canine genome. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Mammalian Genome Springer Journals

A Line 1 insertion in the Factor IX gene segregates with mild hemophilia B in dogs

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Publisher
Springer-Verlag
Copyright
Copyright © 2003 by Springer-Verlag New York Inc.
Subject
Philosophy
ISSN
0938-8990
eISSN
1432-1777
D.O.I.
10.1007/s00335-003-2290-z
Publisher site
See Article on Publisher Site

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