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 Dynjournal_title
Journal of biomolecular structure & dynamicsauthors
Bůzek J,Kuderová A,Pexa T,Stanková V,Lauerová L,Palecek Edoi
10.1080/07391102.1999.10508339subject
Has Abstractpub_date
1999-08-01 00:00:00pages
41-50issue
1eissn
0739-1102issn
1538-0254journal_volume
17pub_type
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