Mutations in TRAPPC12 Manifest in Progressive Childhood Encephalopathy and Golgi Dysfunction
| Autor: | Michael Sacher, Avraham Shaag, Michael O. Dorschner, Miroslav P. Milev, David S. Hanna, Christopher J. Hale, Ian A. Glass, Yong-Han Hank Cheng, Dan Doherty, Keshika Prematilake, Simon Edvardson, Megan E. Grout, Djenann Saint-Dic, Orly Elpeleg |
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| Rok vydání: | 2017 |
| Předmět: |
Male
0301 basic medicine Microcephaly Encephalopathy Golgi Apparatus Endoplasmic Reticulum 03 medical and health sciences symbols.namesake Report Genetics medicine Humans Exome Genetic Predisposition to Disease Cells Cultured Genetics (clinical) Brain Diseases Base Sequence biology Endoplasmic reticulum Brain Infant Membrane Transport Proteins Sequence Analysis DNA Golgi apparatus medicine.disease Magnetic Resonance Imaging Phenotype Transport protein Protein Transport 030104 developmental biology TRAPP complex Membrane protein Child Preschool biology.protein symbols Female Atrophy Transcription Factors |
| Zdroj: | The American Journal of Human Genetics. 101:291-299 |
| ISSN: | 0002-9297 |
| DOI: | 10.1016/j.ajhg.2017.07.006 |
| Popis: | Progressive childhood encephalopathy is an etiologically heterogeneous condition characterized by progressive central nervous system dysfunction in association with a broad range of morbidity and mortality. The causes of encephalopathy can be either non-genetic or genetic. Identifying the genetic causes and dissecting the underlying mechanisms are critical to understanding brain development and improving treatments. Here, we report that variants in TRAPPC12 result in progressive childhood encephalopathy. Three individuals from two unrelated families have either a homozygous deleterious variant (c.145delG [p.Glu49Argfs∗14]) or compound-heterozygous variants (c.360dupC [p.Glu121Argfs∗7] and c.1880C>T [p. Ala627Val]). The clinical phenotypes of the three individuals are strikingly similar: severe disability, microcephaly, hearing loss, spasticity, and characteristic brain imaging findings. Fibroblasts derived from all three individuals showed a fragmented Golgi that could be rescued by expression of wild-type TRAPPC12. Protein transport from the endoplasmic reticulum to and through the Golgi was delayed. TRAPPC12 is a member of the TRAPP protein complex, which functions in membrane trafficking. Variants in several other genes encoding members of the TRAPP complex have been associated with overlapping clinical presentations, indicating shared and distinct functions for each complex member. Detailed understanding of the TRAPP-opathies will illuminate the role of membrane protein transport in human disease. |
| Databáze: | OpenAIRE |
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