    6.1.1.9 | medicine |
a C25U point mutation in the MTTV gene, gene encoding tRNAVal, is associated with a metabolic disorder resulting in the neonatal deaths of numerous siblings. In primary myoblasts and transmitochondrial cybrids established from the proband and offspring, the steady-state levels of the mutated mt-tRNAVal are greater than in the biopsy material, but are still lower than in control myoblasts. Decrease in steady-state mt-tRNAVal observed cell lines is caused by a rapid degradation of the deacylated form of the abnormal mt-tRNAVal. By both establishing the identity of the human mitochondrial valyltRNA synthetase then inducing its overexpression in transmitochondrial cell lines, steady-state levels of the mutated mt-tRNAVal can be partially restored |
694436 |
