Two Novel Missense Mutations in Nonketotic Hyperglycinemia

YILMAZ B. S., KOR D., CEYLANER S., MERT G. G., İNCECİK F., KARTAL E., ...More

JOURNAL OF CHILD NEUROLOGY, vol.30, no.6, pp.789-792, 2015 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 30 Issue: 6
  • Publication Date: 2015
  • Doi Number: 10.1177/0883073814535499
  • Journal Name: JOURNAL OF CHILD NEUROLOGY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.789-792
  • Çukurova University Affiliated: Yes

Abstract

Nonketotic hyperglycinemia (OMIM no. 605899) is an autosomal recessively inherited glycine encephalopathy, caused by a deficiency in the mitochondrial glycine cleavage system. Here we report 2 neonates who were admitted to the hospital with complaints of respiratory failure and myoclonic seizures with an elevated cerebrospinal fluid/plasma glycine ratio and diagnosed as nonketotic hyperglycinemia. We report these cases as 2 novel homozygous mutations; a missense mutation c.593A>T (p.D198 V) in the glycine decarboxylase gene and a splicing mutation c.339G>A (Q113Q) in the aminomethyltransferase gene were detected. We would like to emphasize the genetic difference of our region in inherited metabolic diseases once again.