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. 1989 Jun 26;17(12):4465-9.
doi: 10.1093/nar/17.12.4465.

Deletions of muscle mitochondrial DNA in mitochondrial myopathies: sequence analysis and possible mechanisms

I J Holt  1 , A E Harding, J A Morgan-Hughes
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Free PMC article

Deletions of muscle mitochondrial DNA in mitochondrial myopathies: sequence analysis and possible mechanisms

I J Holt et al. Nucleic Acids Res. .
Free PMC article

Abstract

Forty per cent of patients with mitochondrial myopathies, a diverse group of multisystem diseases predominantly affecting skeletal muscle and the brain, have large deletions of a proportion of muscle mitochondrial DNA (mt DNA). These appeared to be identical in 13 of 28 cases, contained within the region 8286-13595 bp. Analysis of the deletion junction in two cases showed a 13 nucleotide sequence which occurred in the normal genome as a direct repeat flanking the region deleted in the mutant mt DNAs. Mt DNA deletions may arise from recombination or slippage between short sequence repeats during replication.

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