PMID- 10208576 OWN - NLM STAT- MEDLINE DCOM- 19990610 LR - 20190718 IS - 0959-4965 (Print) IS - 0959-4965 (Linking) VI - 10 IP - 3 DP - 1999 Feb 25 TI - A new GTP-cyclohydrolase I mutation in an unusual dopa-responsive dystonia, familial form. PG - 487-91 AB - We found a new mutation in the GTP cyclohydrolase gene involved in dopa-responsive dystonia. We sequenced the GTP cyclohydrolase gene in a family with four siblings affected by this disorder and identified an A-T mutation in exon 2, leading to a non conservative amino acid substitution at codon 135 of the protein (Ile135Lys), which may change the conformation of the binding site of this enzyme. The clinical evolution was heterogeneous among carriers of the same mutation, underlining the involvement of other determinants modulating the occurrence of the disease such as genetic or environmental susceptibility factors. FAU - Brique, S AU - Brique S AD - Department of Neurology A, Hopital Roger Salengro, Centre Hospitalier Universitaire, Lille, France. FAU - Destee, A AU - Destee A FAU - Lambert, J C AU - Lambert JC FAU - Mouroux, V AU - Mouroux V FAU - Delacourte, A AU - Delacourte A FAU - Amouyel, P AU - Amouyel P FAU - Chartier-Harlin, M C AU - Chartier-Harlin MC LA - eng PT - Case Reports PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - England TA - Neuroreport JT - Neuroreport JID - 9100935 RN - EC 3.5.4.16 (GTP Cyclohydrolase) RN - VTD58H1Z2X (Dopamine) SB - IM MH - Adolescent MH - Amino Acid Sequence/genetics MH - Base Sequence/genetics MH - Child MH - Dopamine/*therapeutic use MH - Dystonia/*drug therapy/*genetics MH - Female MH - GTP Cyclohydrolase/*genetics MH - Heterozygote MH - Humans MH - Male MH - Middle Aged MH - Mutation/*physiology MH - Pedigree EDAT- 1999/04/20 00:00 MHDA- 1999/04/20 00:01 CRDT- 1999/04/20 00:00 PHST- 1999/04/20 00:00 [pubmed] PHST- 1999/04/20 00:01 [medline] PHST- 1999/04/20 00:00 [entrez] AID - 10.1097/00001756-199902250-00008 [doi] PST - ppublish SO - Neuroreport. 1999 Feb 25;10(3):487-91. doi: 10.1097/00001756-199902250-00008.