A Novel MUT Gene Mutation Detected in a Female Infant with Methylmalonic Acidemia.

Song,  Woo Sun; Song,  Byung Jin; Park,  Hyung Doo; Kim,  Won Duck

doi:2015.22.1.51

Neonatal Med > Volume 22(1); 2015 > Article

Original Article

Neonatal Medicine 2015;22(1):51-54.
DOI: https://doi.org/10.5385/nm.2015.22.1.51 Published online February 28, 2015.

A Novel MUT Gene Mutation Detected in a Female Infant with Methylmalonic Acidemia.

Woo Sun Song, Byung Jin Song, Hyung Doo Park, Won Duck Kim

¹Department of Pediatrics, Daegu Fatima hospital, Daegu, Korea. 0101turtle@gmail.com
²Department of Laboratory Medicine and Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.

Abstract

Methylmalonic acidemia (MMA) is an autosomal recessive metabolic disease. MMA results from a deficiency of L-methylmalonyl-CoA mutase (encoded by MUT), its cofactor 5-deoxyadenosylcobalamin (MMAA, MMAB, and MMADHC), or a deficiency of methylmalonyl CoA-epimerase (MCEE). We report the case of a 5-day-old infant with MMA in which a missense and a novel nonsense mutation in MUT were present. Direct sequencing analysis of MUT revealed a heterozygous c.1106G>A (p.Arg369His) mutation in exon 6 and a heterozygous c.362_368dupAGTTCTA (p.Tyr123*) mutation in exon 2; the latter results in a premature stop codon.

Key Words: Methylmalonic acidemia; L-methylmalonyl-CoA mutase; Nonsense mutation