Hormone research · 2003
A new missense mutation of the vasopressin-neurophysin II gene in a family with neurohypophyseal diabetes insipidus.
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Wolf M T F, Dötsch J, Metzler M, Holder M, Repp R, Rascher W
Аннотация
OBJECTIVE: Autosomal dominant familial neurohypophyseal diabetes insipidus is a rare disorder characterized by polydipsia and polyuria. We present the results of the molecular analysis of the AVP-NPII gene of a German kindred.
METHODS: All three exons of the gene were amplified by polymerase chain reaction and sequenced.
RESULTS: In 7 affected individuals a new missense mutation (1770G > T) in exon 2 was found predicting a cysteine to phenylalanine substitution at codon 58 in the neurophysin II domain (NPII).
CONCLUSION: As a result of this mutation a cysteine residue is exchanged, which is involved in a disulfide bond with cysteine 44 of the NPII moiety, hypothesizing that the resulting misfolded protein may lead to chronic neurotoxicity by accumulation of these products in the endoplasmatic reticulum.
METHODS: All three exons of the gene were amplified by polymerase chain reaction and sequenced.
RESULTS: In 7 affected individuals a new missense mutation (1770G > T) in exon 2 was found predicting a cysteine to phenylalanine substitution at codon 58 in the neurophysin II domain (NPII).
CONCLUSION: As a result of this mutation a cysteine residue is exchanged, which is involved in a disulfide bond with cysteine 44 of the NPII moiety, hypothesizing that the resulting misfolded protein may lead to chronic neurotoxicity by accumulation of these products in the endoplasmatic reticulum.