Two mutations of the C7 gene, c.1424G > A and c.281-1G > T, in two Korean families.
Complement C7 deficiency is associated with increased susceptibility to meningococcal infection. The genetic alterations of C7 deficiency are known to be sporadic and heterogeneous worldwide. We investigated molecular basis of C7 deficiency in two unrelated Korean families, in which the index cases suffered from meningococcal meningitis. Exon-specific PCR and direct sequencing of the C7 gene revealed two different mutations: c.1424G > A and c.281-1G > T. In family 1, index case and her brother revealed a homozygous mis-sense mutation (c.1424G > A), a novel mutation, which results in the change of cysteine to tyrosine (C475Y) in exon 10. Index case in family 2 was found to be a homozygote carrying point mutation at the 3' splice acceptor site of intron 3 (c.281-1G > T), which was previously reported in a Korean C7-deficient subject.
Kang
Hee Jung
HJ
Department of Laboratory Medicine, Hallym University College of Medicine, Anyang, South Korea. kangheejung@hallym.ac.kr
Ki
Chang-Seok
CS
Kim
Yeon-Sook
YS
Hur
Mina
M
Jang
So Ick
SI
Min
Ki Sik
KS
D000293:Adolescent; D000328:Adult; D001483:Base Sequence; D003184:Complement C7 / Q000172:deficiency* / Q000235:genetics* / Q000276:immunology; D003171:Complement Pathway, Classical / Q000276:immunology; D005260:Female; D006801:Humans; D008297:Male; D008585:Meningitis, Meningococcal / Q000235:genetics / Q000276:immunology*; D009154:Mutation; D016133:Polymerase Chain Reaction / Q000379:methods
D003184:Complement C7