A novel mutation of KCNQ3 (c.925T-->C) in a Japanese family with benign familial neonatal convulsions.
Hirose S,
Zenri F,
Akiyoshi H,
Fukuma G,
Iwata H,
Inoue T,
Yonetani M,
Tsutsumi M,
Muranaka H,
Kurokawa T,
Hanai T,
Wada K,
Kaneko S,
Mitsudome A.
Department of Pediatrics, School of Medicine, Fukuoka University, Japan.
At present, only one mutation of KCNQ3, a KCNQ potassium channel gene, has been identified as a cause of benign familial neonatal convulsions type 2 (BFNC2). We found a T to C substitution (c.925T-C) on one allele of affected individuals in a Japanese family with BFNC but not on 200 alleles from healthy subjects. c.925T-->C replaced Trp309, a conserved residue within the P-loop of the KCNQ potassium channel family that holds the channel pore open, with an Arg (W309R). We report c.925T-->C as the second mutation of KCNQ3 responsible for BFNC2.
PMID: 10852552 [PubMed - indexed for MEDLINE]