Defects of mitochondrial DNA replication.
Defects of mitochondrial DNA replication.
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DOI:
10.1177/0883073814537380
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发表时间:
2014-09
影响因子:
1.9
通讯作者:
Copeland WC
中科院分区:
文献类型:
--
作者:
Copeland WC
Mitochondrial DNA (mtDNA) is replicated by DNA polymerase γ in concert with accessory proteins such as the mitochondrial DNA helicase, single-stranded DNA binding protein, topoisomerase, and initiating factors. Defects in mtDNA replication or nucleotide metabolism can cause mitochondrial genetic diseases due to mtDNA deletions, point mutations, or depletion, which ultimately cause loss of oxidative phosphorylation. These genetic diseases include mtDNA depletion syndromes such as Alpers or early infantile hepatocerebral syndromes, and mtDNA deletion disorders, such as progressive external ophthalmoplegia, ataxia-neuropathy, or mitochondrial neurogastrointestinal encephalomyopathy. This review focuses on our current knowledge of genetic defects of mtDNA replication (POLG, POLG2, C10orf2, and MGME1) that cause instability of mtDNA and mitochondrial disease.
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