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dc.contributor.authorWilkinson, M C
dc.contributor.authorCooper, Donald P
dc.contributor.authorSouthan, C
dc.contributor.authorPotter, P M
dc.contributor.authorMargison, Geoffrey P
dc.date.accessioned2010-08-18T08:50:34Z
dc.date.available2010-08-18T08:50:34Z
dc.date.issued1990-01-11
dc.identifier.citationPurification to apparent homogeneity and partial amino acid sequence of rat liver O6-alkylguanine-DNA-alkyltransferase. 1990, 18 (1):13-6 Nucleic Acids Res.en
dc.identifier.issn0305-1048
dc.identifier.pmid2308819
dc.identifier.doi10.1093/nar/18.1.13
dc.identifier.urihttp://hdl.handle.net/10541/109803
dc.description.abstractO6-alkylguanine-DNA-alkyltransferase (ATase) activity was increased in rat liver from 80 to 320 fmoles/mg total protein 48 h after administration of 2-acetylaminofluorene at 60 mg/kg body weight. This tissue was used as a source of ATase which was purified by ammonium sulphate precipitation and DNA-cellulose, molecular exclusion and ion exchange chromatography (IEC). IEC purified material showed a major 24 kDa band after polyacrylamide gel electrophoresis (PAGE) with silver staining. Fluorography of purified ATase following incubation with [3H]-methylated substrate DNA and PAGE showed a single band at 24 kDa suggesting that, as with bacterial ATases, the protein itself accepts the alkyl group from O6-alkylguanine in substrate DNA during the repair reaction. Further purification of the protein using reverse phase HPLC resulted in a single peak representing approximately 125,000 fold purification. This was subjected to amino-terminal sequencing and it was found that the protein was blocked at the amino-terminal end: it was cleaved using trypsin or cyanogen bromide and the amino acid sequence of several reverse phase HPLC purified fragments was determined.
dc.language.isoenen
dc.subject.meshAmino Acid Sequence
dc.subject.meshAnimals
dc.subject.meshChromatography, High Pressure Liquid
dc.subject.meshElectrophoresis, Polyacrylamide Gel
dc.subject.meshLiver
dc.subject.meshMethyltransferases
dc.subject.meshMolecular Sequence Data
dc.subject.meshO(6)-Methylguanine-DNA Methyltransferase
dc.subject.meshPeptide Fragments
dc.subject.meshRats
dc.titlePurification to apparent homogeneity and partial amino acid sequence of rat liver O6-alkylguanine-DNA-alkyltransferase.en
dc.typeArticleen
dc.contributor.departmentDepartment of Carcinogenesis, Paterson Institute for Cancer Research, Christie Hospital, Manchester, UK.en
dc.identifier.journalNucleic Acids Researchen
html.description.abstractO6-alkylguanine-DNA-alkyltransferase (ATase) activity was increased in rat liver from 80 to 320 fmoles/mg total protein 48 h after administration of 2-acetylaminofluorene at 60 mg/kg body weight. This tissue was used as a source of ATase which was purified by ammonium sulphate precipitation and DNA-cellulose, molecular exclusion and ion exchange chromatography (IEC). IEC purified material showed a major 24 kDa band after polyacrylamide gel electrophoresis (PAGE) with silver staining. Fluorography of purified ATase following incubation with [3H]-methylated substrate DNA and PAGE showed a single band at 24 kDa suggesting that, as with bacterial ATases, the protein itself accepts the alkyl group from O6-alkylguanine in substrate DNA during the repair reaction. Further purification of the protein using reverse phase HPLC resulted in a single peak representing approximately 125,000 fold purification. This was subjected to amino-terminal sequencing and it was found that the protein was blocked at the amino-terminal end: it was cleaved using trypsin or cyanogen bromide and the amino acid sequence of several reverse phase HPLC purified fragments was determined.


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