In vitro repair of UV-irradiated Micrococcus luteus bacteriophage N1 transfecting DNA.
نویسندگان
چکیده
Calcium-treated UV-sensitive, host cell reactivation(-) strains of Micrococcus luteus are infected with UV-irradiated N1 DNA. In strains lacking UV endonuclease, in vitro treatment of the irradiated DNA results in transfection enhancement.
منابع مشابه
Excision repair and patch size in UV-irradiated bacteriophage T4.
We determined the average size of excision repair patches in repair of UV lesions in bacteriophage T4 by measuring the photolysis of bromodeoxyuridine incorporated during repair. The average patch was small, approximately four nucleotides long. In control experiments with the denV1 excision-deficient mutant, we encountered an artifact, a protein(s) which remained bound to phenol-extracted DNA a...
متن کاملDeoxyribonucleic acid repair in vitro by extracts of Escherichia coli.
Deoxyribonucleic acid (DNA) from bacteriophage T7 has been used to monitor the capacity of gently lysed extracts of Escherichia coli to perform repair resynthesis after ultraviolet (UV) irradiation. Purified DNA damaged by up to 100 J of UV radiation per m2 was treated with an endonuclease from Micrococcus luteus that introduces single-strand breaks in irradiated DNA. This DNA was then used as ...
متن کاملEndonuclease from Micrococcus luteus which has activity toward ultraviolet-irradiated deoxyribonucleic acid: its action on transforming deoxyribonucleic acid.
An endonuclease purified from Micrococcus luteus makes single-strand breaks in ultraviolet (UV)-irradiated, native deoxyribonucleic acid (DNA). The purified endonuclease is able to reactivate UV-inactivated transforming DNA of Haemophilus influenzae, especially when the DNA is assayed on a UV-sensitive mutant of H. influenzae. After extensive endonuclease action, there is a loss of transforming...
متن کاملEndonucleolytic activity from Micrococcus luteus that acts on -ray-induced damage in plasmid DNA of Escherichia coli minicells.
A partially purified extract from Micrococcus luteus contains endonucleolytic activity toward ultraviolet (UV)-irradiated deoxyribonucleic acid (DNA). We found that the same extract also acts on superhelical, covalently-closed circular lambdadv DNA isolated from gamma-irradiated minicells of E. coli. The introduction of nicks in isolated covalently-closed circular DNA by an endonuclease in the ...
متن کاملExcision of ultraviolet damage and the effect of irradiation on DNA synthesis in a strain of Bloom's syndrome fibroblasts.
We have studied repair of ultraviolet light (UV)-induced damage in a strain of Bloom's syndrome cells which we have shown to be defective in host cell reactivation of UV-irradiated herpes simplex virus. Excision repair was monitored by following loss of sensitivity of DNA in permeabilized cells to digestion by the Micrococcus luteus UV endonuclease preparation. The Bloom's syndrome fibroblasts ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Journal of virology
دوره 13 3 شماره
صفحات -
تاریخ انتشار 1974