Pharmacogenomics, Toxicogenomics, and DNA Polymerase γ
نویسندگان
چکیده
منابع مشابه
DNA microarrays and pharmacogenomics.
The DNA microarrays have proven to be a state of the art technique for high throughput comprehensive analysis of thousand of genes in parallel. The application of a DNA microarray to compare normal and pathological cells, tissues or organs may allow, along with classical positional cloning techniques, to speed up the discovery of genes and gene pathways implicated in several diseases. This in t...
متن کاملThe DNA polymerase III holoenzyme contains γ and is not a trimeric polymerase.
There is widespread agreement that the clamp loader of the Escherichia coli replicase has the composition DnaX3δδ'χψ. Two DnaX proteins exist in E. coli, full length τ and a truncated γ that is created by ribosomal frameshifting. τ binds DNA polymerase III tightly; γ does not. There is a controversy as to whether or not DNA polymerase III holoenzyme (Pol III HE) contains γ. A three-τ form of Po...
متن کاملThe exonuclease activity of DNA polymerase γ is required for ligation during mitochondrial DNA replication
Mitochondrial DNA (mtDNA) polymerase γ (POLγ) harbours a 3'-5' exonuclease proofreading activity. Here we demonstrate that this activity is required for the creation of ligatable ends during mtDNA replication. Exonuclease-deficient POLγ fails to pause on reaching a downstream 5'-end. Instead, the enzyme continues to polymerize into double-stranded DNA, creating an unligatable 5'-flap. Disease-a...
متن کاملAtomistic Molecular Dynamics Simulations of Mitochondrial DNA Polymerase γ: Novel Mechanisms of Function and Pathogenesis.
DNA polymerase γ (Pol γ) is a key component of the mitochondrial DNA replisome and an important cause of neurological diseases. Despite the availability of its crystal structures, the molecular mechanism of DNA replication, the switch between polymerase and exonuclease activities, the site of replisomal interactions, and functional effects of patient mutations that do not affect direct catalysi...
متن کاملSequence-specific stalling of DNA polymerase γ and the effects of mutations causing progressive ophthalmoplegia.
A large number of mutations in the gene encoding the catalytic subunit of mitochondrial DNA polymerase γ (POLγA) cause human disease. The Y955C mutation is common and leads to a dominant disease with progressive external ophthalmoplegia and other symptoms. The biochemical effect of the Y955C mutation has been extensively studied and it has been reported to lower enzyme processivity due to decre...
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ژورنال
عنوان ژورنال: The Journal of Infectious Diseases
سال: 2007
ISSN: 0022-1899,1537-6613
DOI: 10.1086/513879