A frame shift mutation in the PMP22 gene in hereditary neuropathy with liability to pressure palsies.
Hereditary neuropathy with liability to pressure palsies (HNPP) has been a associated with a deletion of 1.5 megabases of chromosome 17p. One of four biopsy proven HNPP families that we have studied did not possess this deletion. As the deleted DNA region includes the coding region for a peripheral myelin gene (PMP22), we used single strand conformation analysis to examine this gene for mutations in the non-deleted HNPP family. An abnormal fragment in exon 1 was identified, and sequencing revealed a two base pair deletion in all affected family members. The deletion results in a frame shift, providing strong evidence that this gene has an important role in the pathogenesis of the disease.
University of Sydney, Molecular Genetics and Medicine Laboratory, Concord Hospital, New South Wales, Australia.
G A
GA
Nicholson
L J
LJ
Valentijn
A K
AK
Cherryson
M L
ML
Kennerson
T L
TL
Bragg
R M
RM
DeKroon
D A
DA
Ross
J D
JD
Pollard
J G
JG
McLeod
P A
PA
Bolhuis
D001483:Base Sequence; D002886:Chromosomes, Human, Pair 17; D004247:DNA / Q000235:genetics; D017931:DNA Primers / Q000235:genetics; D005091:Exons; D005260:Female; D016368:Frameshift Mutation; D006801:Humans; D008297:Male; D008969:Molecular Sequence Data; D009185:Myelin Proteins / Q000235:genetics; D009422:Nervous System Diseases / Q000235:genetics*; D010243:Paralysis / Q000235:genetics; D010375:Pedigree; D011312:Pressure; D017384:Sequence Deletion
D017931:DNA Primers; D009185:Myelin Proteins; C073687:PMP22 protein, human; D004247:DNA