A new disease-related mutation for mitochondrial encephalopathy lactic acidosis and strokelike episodes (MELAS) syndrome affects the ND4 subunit of the respiratory complex I.
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Lertrit P, Noer AS, Jean-Francois MJ, Kapsa R, Dennett X, Thyagarajan D, Lethlean K, Byrne E, Marzuki S
A new disease-related mutation for mitochondrial encephalopathy lactic acidosis and strokelike episodes (MELAS) syndrome affects the ND4 subunit of the respiratory complex I.
Am J Hum Genet. 1992 Sep;51(3):457-68.
- PubMed ID
- 1323207 [ View in PubMed]
- Abstract
The molecular lesions in two patients exhibiting classical clinical manifestations of MELAS (mitochondrial encephalopathy, lactic acidosis, and strokelike episodes) syndrome have been investigated. A recently reported disease-related A----G base substitution at nt 3243 of the mtDNA, in the DHU loop of tRNA(Leu), was detected by restriction-enzyme analysis of the relevant PCR-amplified segment of the mtDNA of one patient but was not observed, by either restriction-enzyme analysis or nucleotide sequencing, in the other. To define the molecular lesion in the patient who does not have the A----G base substitution at nt 3243, the total mitochondrial genome of the patient has been sequenced. An A----G base substitution at nt 11084, leading to a Thr-to-Ala amino acid replacement in the ND4 subunit of the respiratory complex I, is suggested to be a disease-related mutation.