PMID- 27829678 OWN - NLM STAT- MEDLINE DCOM- 20170524 LR - 20181113 IS - 1435-232X (Electronic) IS - 1434-5161 (Linking) VI - 62 IP - 2 DP - 2017 Feb TI - Missing genetic variations in GNE myopathy: rearrangement hotspots encompassing 5'UTR and founder allele. PG - 159-166 LID - 10.1038/jhg.2016.134 [doi] AB - GNE myopathy is an autosomal recessive distal myopathy caused by loss-of-function mutations in the GNE gene, which encodes UDP-GlcNAc 2-epimerase/ManNAc kinase (GNE), a key enzyme in sialic-acid biosynthesis. By comprehensive screening of manifesting patients using a fine-mapped targeted next-generation sequencing (NGS), we identified copy number variations (CNVs) in 13 patients from 11 unrelated families. The nine unique CNVs largely vary in size from 0.3 to 72 kb. Over half of the cases carry different deletions spanning merely exon 2, which contains the 5' untranslated region (5'UTR) of the muscle major transcript hGNE1. Of most unique CNVs, either the telomeric or the centromeric breakpoint locates within intron 2, indicating rearrangement hotspots. Haplotype analysis suggested the existence of a founder allele with exon 2 deletion. The breakpoints for all CNVs were determined by long-range PCR and sequencing. All of the breakpoints of gross deletion/duplications reside within directly oriented pairs of Alu repeats. The results of this study firstly widen the spectra of mutations to CNVs encompassing 5'UTR, underscoring the pivotal role of the hGNE1 transcript. Alu-mediated non-recurrent CNVs may have been overlooked in a wide variety of recessive phenotypes, especially in those associated with genomic Alu-rich genes such as GNE. FAU - Zhu, Wenhua AU - Zhu W AD - Department of Neuromuscular Research, National Institute of Neuroscience, Tokyo, Japan. AD - Department of Genome Medicine Development, Medical Genome Center (MGC), National Center of Neurology and Psychiatry, Tokyo, Japan. AD - Department of Neurology, Huashan Hospital, Fudan University, Shanghai, China. FAU - Mitsuhashi, Satomi AU - Mitsuhashi S AD - Department of Neuromuscular Research, National Institute of Neuroscience, Tokyo, Japan. AD - Department of Genome Medicine Development, Medical Genome Center (MGC), National Center of Neurology and Psychiatry, Tokyo, Japan. FAU - Yonekawa, Takahiro AU - Yonekawa T AD - Department of Neuromuscular Research, National Institute of Neuroscience, Tokyo, Japan. FAU - Noguchi, Satoru AU - Noguchi S AD - Department of Neuromuscular Research, National Institute of Neuroscience, Tokyo, Japan. AD - Department of Genome Medicine Development, Medical Genome Center (MGC), National Center of Neurology and Psychiatry, Tokyo, Japan. FAU - Huei, Josiah Chai Yui AU - Huei JC AD - Department of Neurology, National Neuroscience Institute, Singapore, Singapore. FAU - Nalini, Atchayaram AU - Nalini A AD - Department of Neurology, Bangalore, India. FAU - Preethish-Kumar, Veeramani AU - Preethish-Kumar V AD - Department of Clinical Neurosciences, National Institute of Mental Health and Neurosciences, Bangalore, India. FAU - Yamamoto, Masayoshi AU - Yamamoto M AD - Department of Neurology, Kansai Electric Power Hospital, Osaka, Japan. FAU - Murakata, Kenji AU - Murakata K AD - Department of Neurology, Kansai Electric Power Hospital, Osaka, Japan. FAU - Mori-Yoshimura, Madoka AU - Mori-Yoshimura M AD - Department of Neurology, National Center Hospital, National Center of Neurology and Psychiatry, Tokyo, Japan. FAU - Kamada, Sachiko AU - Kamada S AD - Department of Neurology, Akita University Graduate School of Medicine, Akita, Japan. FAU - Yahikozawa, Hiroyuki AU - Yahikozawa H AD - Department of Neurology, Nagano Red Cross Hospital, Nagano, Japan. FAU - Karasawa, Masato AU - Karasawa M AD - Shizusato Shinryojo, Gifu, Japan. FAU - Kimura, Seigo AU - Kimura S AD - Department of Neurology, Graduate School of Medicine, Nagoya University, Nagoya, Japan. FAU - Yamashita, Fumitada AU - Yamashita F AD - Department of Neurology, Ogaki Municipal Hospital, Gifu, Japan. FAU - Nishino, Ichizo AU - Nishino I AD - Department of Neuromuscular Research, National Institute of Neuroscience, Tokyo, Japan. AD - Department of Genome Medicine Development, Medical Genome Center (MGC), National Center of Neurology and Psychiatry, Tokyo, Japan. LA - eng PT - Journal Article DEP - 20161110 PL - England TA - J Hum Genet JT - Journal of human genetics JID - 9808008 RN - 0 (5' Untranslated Regions) RN - 0 (Multienzyme Complexes) RN - 0 (UDP-N-acetylglucosamine 2-epimerase - N-acetylmannosamine kinase) RN - Distal myopathy, Nonaka type SB - IM MH - 5' Untranslated Regions/*genetics MH - Adult MH - Base Sequence MH - DNA Copy Number Variations/*genetics MH - Distal Myopathies/*genetics MH - Female MH - Genetic Predisposition to Disease MH - Genetic Testing MH - Genome/genetics MH - Genome-Wide Association Study MH - Haplotypes/genetics MH - Humans MH - Male MH - Multienzyme Complexes/*genetics MH - Mutation, Missense/genetics MH - Polymerase Chain Reaction MH - Sequence Analysis, DNA MH - Sequence Deletion/genetics MH - Young Adult EDAT- 2016/11/11 06:00 MHDA- 2017/05/26 06:00 CRDT- 2016/11/11 06:00 PHST- 2016/07/24 00:00 [received] PHST- 2016/09/17 00:00 [revised] PHST- 2016/09/30 00:00 [accepted] PHST- 2016/11/11 06:00 [pubmed] PHST- 2017/05/26 06:00 [medline] PHST- 2016/11/11 06:00 [entrez] AID - jhg2016134 [pii] AID - 10.1038/jhg.2016.134 [doi] PST - ppublish SO - J Hum Genet. 2017 Feb;62(2):159-166. doi: 10.1038/jhg.2016.134. Epub 2016 Nov 10.