Identification of novel mutations in the human ornithine transcarbamylase (OTC) gene of Korean patients with OTC deficiency and transient expression of the mutant proteins in vitro.
The urea cycle plays key roles to prevent the accumulation of toxic nitrogenous compound and synthesize arginine de novo. Ornithine transcarbamylase (OTC) deficiency is the most common inborn error of urea cycle, which is inherited in an X-linked manner. This study was undertaken to characterize molecular defects in Korean patients with OTC deficiency. With direct sequence analysis of OTC gene of 26 unrelated Korean patients with OTC deficiency, 23 different mutations were identified. Among these mutations, eleven were novel mutations. The novel mutations were p.Leu9X, p.Arg26Pro, p.Gly100Arg, p.Met205Thr, p.Lys221Asn, p.Asp249Gly, p.Phe281Ser, p.Val323Met, c.571delC, c.853delC, and c.796-805del. All the novel mutations in this study were tested in 100 normal alleles. In vitro expression study of some of novel missense mutations elucidated the correlation of genotype and phenotype of the OTC deficiency.
Kim
Gu-Hwan
GH
Medical Genetics Clinics and Laboratory, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea.
Choi
Jin-Ho
JH
Lee
Hyung-Haon
HH
Park
Sangwook
S
Kim
Sung-Su
SS
Yoo
Han-Wook
HW
D000293:Adolescent; D000818:Animals; D044466:Asian People / Q000235:genetics; D015153:Blotting, Western; D019556:COS Cells; D002648:Child; D002675:Child, Preschool; D002522:Chlorocebus aethiops; D002851:Chromatography, High Pressure Liquid / Q000379:methods; D005260:Female; D005820:Genetic Testing; D006801:Humans; D066298:In Vitro Techniques; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D050505:Mutant Proteins / Q000378:metabolism; D009154:Mutation; D009954:Ornithine Carbamoyltransferase / Q000235:genetics* / Q000378:metabolism; D020163:Ornithine Carbamoyltransferase Deficiency Disease / Q000235:genetics*; D010641:Phenotype; D014162:Transfection / Q000379:methods
D050505:Mutant Proteins; D009954:Ornithine Carbamoyltransferase