Monoclonal antibody against DNA adducts with osmium structural probes.

Abstract:

:Osmium tetroxide complexes with nitrogen ligands (Os,L) have been widely used as probes of the DNA structure. A monoclonal antibody OsBP7H8 against DNA adducts with Os,L was produced in mice. OsBP7H8 does not bind to proteins or total yeast RNA modified with Os,2,2'-bipyridine (bipy) nor to the unmodified nucleic acids and proteins. The antibody recognizes DNA modified with Os,bipy (DNA-Os,bipy) or with OsO4,1,10-phenanthroline (DNA-Os,phen) but it does not cross-react with oxidized DNA and with DNA adducts of osmium tetroxide complexes with other ligands (such as pyridine, TEMED and bathophenanthroline disulfonic acid). The affinity of OsBP7H8 to DNA-Os,phen is about five-fold higher as compared to DNA-Os,bipy. The antibody can be thus applied either for recognition of single-stranded and distorted regions in DNA (after DNA modification with Os,bipy) or for detection of both single-stranded and double-stranded DNAs (after DNA modification with Os,phen). A new simplified procedure for the dot-blot analysis is proposed, not requiring the purification of DNA-osmium adduct prior to its application to the membrane.

journal_name

J Biomol Struct Dyn

authors

Bůzek J,Kuderová A,Pexa T,Stanková V,Lauerová L,Palecek E

doi

10.1080/07391102.1999.10508339

subject

Has Abstract

pub_date

1999-08-01 00:00:00

pages

41-50

issue

1

eissn

0739-1102

issn

1538-0254

journal_volume

17

pub_type

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