Blocking cyclobutane pyrimidine dimer formation by steric hindrance
نویسندگان
چکیده
منابع مشابه
The native cyclobutane pyrimidine dimer photolyase of rice is phosphorylated.
The cyclobutane pyrimidine dimer (CPD) is a major type of DNA damage induced by ultraviolet B (UVB) radiation. CPD photolyase, which absorbs blue/UVA light as an energy source to monomerize dimers, is a crucial factor for determining the sensitivity of rice (Oryza sativa) to UVB radiation. Here, we purified native class II CPD photolyase from rice leaves. As the final purification step, CPD pho...
متن کاملPhotosensitized [2 + 2] cycloaddition of N-acetylated cytosine affords stereoselective formation of cyclobutane pyrimidine dimer
Photocycloaddition between two adjacent bases in DNA produces a cyclobutane pyrimidine dimer (CPD), which is one of the major UV-induced DNA lesions, with either the cis-syn or trans-syn structure. In this study, we investigated the photosensitized intramolecular cycloaddition of partially-protected thymidylyl-(3'→5')-N(4)-acetyl-2'-deoxy-5-methylcytidine, to clarify the effect of the base modi...
متن کاملDynamics and mechanism of cyclobutane pyrimidine dimer repair by DNA photolyase.
Photolyase uses blue light to restore the major ultraviolet (UV)-induced DNA damage, the cyclobutane pyrimidine dimer (CPD), to two normal bases by splitting the cyclobutane ring. Our earlier studies showed that the overall repair is completed in 700 ps through a cyclic electron-transfer radical mechanism. However, the two fundamental processes, electron-tunneling pathways and cyclobutane ring ...
متن کاملEffect of sequence and metal ions on UVB-induced anti cyclobutane pyrimidine dimer formation in human telomeric DNA sequences
Irradiation of G-quadruplex forming human telomeric DNA with ultraviolet B (UVB) light results in the formation of anti cyclobutane pyrimidine dimers (CPDs) between loop 1 and loop 3 in the presence of potassium ions but not sodium ions. This was unexpected because the sequences involved favor the nonphotoreactive hybrid conformations in K(+) solution, whereas a potentially photoreactive basket...
متن کاملExcimer formation in organic emitter films associated with a molecular orientation promoted by steric hindrance.
White emission with two sharp strong peaks - a molecular emission peak at 455 nm and an excimer emission peak at 591 nm - was obtained by introducing a terphenyl group into a highly twisted core chromophore, which promoted a molecular orientation in the film state suitable for excimer formation.
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ژورنال
عنوان ژورنال: Organic & Biomolecular Chemistry
سال: 2016
ISSN: 1477-0520,1477-0539
DOI: 10.1039/c6ob00382f