PMID- 10319589 OWN - NLM STAT- MEDLINE DCOM- 19990608 LR - 20191210 IS - 1434-5161 (Print) IS - 1434-5161 (Linking) VI - 44 IP - 3 DP - 1999 TI - Identification of three novel mutations in the MNK gene in three unrelated Japanese patients with classical Menkes disease. PG - 206-9 AB - Menkes disease is an X-linked recessive disorder of the copper membrane transport system caused by mutations to the Menkes (MNK) gene. We identified three novel mutations of the MNK gene in three unrelated Japanese patients with classical Menkes disease by analyzing reverse-transcriptase polymerase chain reaction products and genomic DNA of the MNK gene. Firstly, an insertional mutation was found, 1173 ins A, which led to a premature termination and resulted in a very immature Menkes protein. Secondly, we found a point mutation, T2763G, resulting in a leucine-to-arginine conversion, which we predicted would cause a change in the secondary structure of the Menkes protein. Finally, we identified a splicing mutation, 2317 + 5G > C, which resulted in the skipping of both exons 8 and 9 or exon 9 only, and led to a truncation of the protein. Each of these mutations is hypothesized to destroy copper-ATPase-mediated copper transport. We propose that each of these mutations in the MNK gene plays a causative role in the disease. FAU - Ogawa, A AU - Ogawa A AD - Department of Pediatrics, Chiba University School of Medicine, Japan. aogawa@pediat3.m.chiba-u.ac.jp FAU - Yamamoto, S AU - Yamamoto S FAU - Takayanagi, M AU - Takayanagi M FAU - Kogo, T AU - Kogo T FAU - Kanazawa, M AU - Kanazawa M FAU - Kohno, Y AU - Kohno Y LA - eng PT - Case Reports PT - Journal Article PL - England TA - J Hum Genet JT - Journal of human genetics JID - 9808008 RN - 0 (Carrier Proteins) RN - 0 (Cation Transport Proteins) RN - 0 (RNA, Messenger) RN - 0 (Recombinant Fusion Proteins) RN - 789U1901C5 (Copper) RN - EC 3.6.1.- (Adenosine Triphosphatases) RN - EC 7.2.2.8 (ATP7A protein, human) RN - EC 7.2.2.8 (Copper-Transporting ATPases) SB - IM MH - Adenosine Triphosphatases/*genetics MH - Carrier Proteins/*genetics MH - *Cation Transport Proteins MH - Cells, Cultured MH - Child MH - Child, Preschool MH - Copper/analysis MH - Copper-Transporting ATPases MH - Fibroblasts/cytology MH - Humans MH - Japan MH - Menkes Kinky Hair Syndrome/diagnosis/*genetics MH - Mutagenesis, Insertional MH - *Mutation MH - Point Mutation MH - RNA Splicing MH - RNA, Messenger/genetics MH - *Recombinant Fusion Proteins MH - Reverse Transcriptase Polymerase Chain Reaction MH - Sequence Analysis, DNA EDAT- 1999/05/13 00:00 MHDA- 1999/05/13 00:01 CRDT- 1999/05/13 00:00 PHST- 1999/05/13 00:00 [pubmed] PHST- 1999/05/13 00:01 [medline] PHST- 1999/05/13 00:00 [entrez] AID - 10.1007/s100380050144 [doi] PST - ppublish SO - J Hum Genet. 1999;44(3):206-9. doi: 10.1007/s100380050144.