منابع مشابه
Somatic Hypermutation, Transcription, and DNA Mismatch Repair
hypermutation, suggesting that cis-acting sequences outside the mutable region regulate and target mutation. However, almost nothing is known about the detailed molecular mechanisms or transacting proteins that are responsible for V-region hypermutation. Because the mutational process begins just downstream of the promoter and requires transcriptional en-hancers (Neuberger et al., 1998), it has...
متن کاملOGG1 DNA Repair Gene Polymorphism As a Biomarker of Oxidative and Genotoxic DNA Damage
Background: Single nucleotide polymorphisms in 8-oxoguanine DNA glycosylase-1 (OGG1) gene modulates DNA repair capacity and functions as one of the first lines of protective mechanisms against 8-hydroxy-2’-deoxyguanosine (8-OHdG) mutagenicity. OGG1-Cys326 gene polymorphism may decrease DNA repair function, causing oxidative stress due to higher oxidative DNA damage. The main purpose of this stu...
متن کاملMechanistic insights into transcription coupled DNA repair.
Transcription-coupled DNA repair (TCR) acts on lesions in the transcribed strand of active genes. Helix distorting adducts and other forms of DNA damage often interfere with the progression of the transcription apparatus. Prolonged stalling of RNA polymerase can promote genome instability and also induce cell cycle arrest and apoptosis. These generally unfavorable events are counteracted by RNA...
متن کاملStalled transcription complexes promote DNA repair at a distance.
Transcription-coupled nucleotide excision repair (TCR) accelerates the removal of noncoding lesions from the template strand of active genes, and hence contributes to genome-wide variations in mutation frequency. Current models for TCR suppose that a lesion must cause RNA polymerase (RNAP) to stall if it is to be a substrate for accelerated repair. We have examined the substrate requirements fo...
متن کاملXAB2, a novel tetratricopeptide repeat protein involved in transcription-coupled DNA repair and transcription.
Nucleotide excision repair is a highly versatile DNA repair system responsible for elimination of a wide variety of lesions from the genome. It is comprised of two subpathways: transcription-coupled repair that accomplishes efficient removal of damage blocking transcription and global genome repair. Recently, the basic mechanism of global genome repair has emerged from biochemical studies. Howe...
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ژورنال
عنوان ژورنال: Journal of Biological Chemistry
سال: 2012
ISSN: 0021-9258
DOI: 10.1074/jbc.r112.377135