Neuronal ceroid lipofuscinosis in Devon cattle is caused by a single base duplication (c.662dupG) in the bovine CLN5 gene.
The neuronal ceroid lipofuscinoses (NCLs, Batten disease) are recessively inherited neurodegenerative disorders that affect humans and other animals, characterised by brain atrophy and the accumulation of lysosome derived fluorescent storage bodies in neurons and most other cells. Common clinical signs include blindness, ataxia, dementia, seizures and premature death. The associated genes for six different human forms have been identified (CLN1, CLN2, CLN3, CLN5, CLN6 and CLN8), and three other human forms suggested (CLNs 4, 7 and 9). A form of NCL in Australian Devon cattle is caused by a single base duplication (c.662dupG) in bovine CLN5. This mutation causes a frame-shift and premature termination (p.Arg221GlyfsX6) which is predicted to result in a severely truncated protein, analogous to disease causing mutations in human Finnish late infantile variant NCL (CLN5), and a simple genetic diagnostic test has been developed. The symptoms and disease course in cattle also matches CLN5. Only one initiation site was found in the bovine gene, equivalent to the third of four possible initiation sites in the human gene. As cattle are anatomically and physiologically similar to humans with a human-like central nervous system and easy to maintain and breed, they provide a valuable alternative model for CLN5 studies.
Houweling
Peter J
PJ
Centre for Advanced Technologies in Animal Genetics and Reproduction (Reprogen), Faculty of Veterinary Science, The University of Sydney, PMB3, Camden NSW, Australia.
Cavanagh
Julie A L
JA
Palmer
David N
DN
Frugier
Tony
T
Mitchell
Nadia L
NL
Windsor
Peter A
PA
Raadsma
Herman W
HW
Tammen
Imke
I
D000595:Amino Acid Sequence; D000818:Animals; D002417:Cattle / Q000002:abnormalities*; D002418:Cattle Diseases / Q000235:genetics*; D022202:Chromosomes, Artificial, Bacterial; D016368:Frameshift Mutation; D020022:Genetic Predisposition to Disease; D008565:Membrane Proteins / Q000235:genetics*; D008969:Molecular Sequence Data; D009472:Neuronal Ceroid-Lipofuscinoses / Q000235:genetics* / Q000662:veterinary*; D017386:Sequence Homology, Amino Acid; D000091346:Tripeptidyl-Peptidase 1
D008565:Membrane Proteins; D000091346:Tripeptidyl-Peptidase 1; C000717267:TPP1 protein, human