1mtl: Difference between revisions
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'''Non-productive MUG-DNA complex''' | '''Non-productive MUG-DNA complex''' | ||
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[[Category: Pearl, L H.]] | [[Category: Pearl, L H.]] | ||
[[Category: Savva, R.]] | [[Category: Savva, R.]] | ||
[[Category: | [[Category: Cis-platin]] | ||
[[Category: | [[Category: Glycosylase]] | ||
[[Category: | [[Category: Inter-strand]] | ||
[[Category: | [[Category: Non-productive]] | ||
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Revision as of 22:42, 2 May 2008
Non-productive MUG-DNA complex
Overview
Base-excision of a self-complementary oligonucleotide with central G:T mismatches by the G:T/U-specific mismatch DNA glycosylase (MUG), generates an unusual DNA structure which is remarkably similar in conformation to an interstrand DNA adduct of the anti-tumor drug cis-diamminedichloroplatinum. The abasic sugars generated by excision of the mismatched thymines are extruded from the double-helix, and the 'widowed' deoxyguanosines rotate so that their N7 and O6 groups protrude into the minor groove of the duplex and restack in an interleaved intercalative geometry, generating a kink in the helix axis.
About this Structure
1MTL is a Single protein structure of sequence from Escherichia coli. Full crystallographic information is available from OCA.
Reference
Structure of a DNA base-excision product resembling a cisplatin inter-strand adduct., Barrett TE, Savva R, Barlow T, Brown T, Jiricny J, Pearl LH, Nat Struct Biol. 1998 Aug;5(8):697-701. PMID:9699633 Page seeded by OCA on Sat May 3 01:42:02 2008