6bna
From Proteopedia
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| - | + | {{STRUCTURE_6bna| PDB=6bna | SCENE= }} | |
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'''BINDING OF AN ANTITUMOR DRUG TO DNA. NETROPSIN AND C-G-C-G-A-A-T-T-BRC-G-C-G''' | '''BINDING OF AN ANTITUMOR DRUG TO DNA. NETROPSIN AND C-G-C-G-A-A-T-T-BRC-G-C-G''' | ||
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==About this Structure== | ==About this Structure== | ||
| - | + | Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6BNA OCA]. | |
==Reference== | ==Reference== | ||
Binding of an antitumor drug to DNA, Netropsin and C-G-C-G-A-A-T-T-BrC-G-C-G., Kopka ML, Yoon C, Goodsell D, Pjura P, Dickerson RE, J Mol Biol. 1985 Jun 25;183(4):553-63. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/2991536 2991536] | Binding of an antitumor drug to DNA, Netropsin and C-G-C-G-A-A-T-T-BrC-G-C-G., Kopka ML, Yoon C, Goodsell D, Pjura P, Dickerson RE, J Mol Biol. 1985 Jun 25;183(4):553-63. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/2991536 2991536] | ||
| - | [[Category: Protein complex]] | ||
[[Category: Dickerson, R E.]] | [[Category: Dickerson, R E.]] | ||
[[Category: Goodsell, D.]] | [[Category: Goodsell, D.]] | ||
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[[Category: Pjura, P.]] | [[Category: Pjura, P.]] | ||
[[Category: Yoon, C.]] | [[Category: Yoon, C.]] | ||
| - | [[Category: | + | [[Category: B-dna]] |
| - | [[Category: | + | [[Category: Complexed with drug]] |
| - | [[Category: | + | [[Category: Double helix]] |
| - | [[Category: | + | [[Category: Modified]] |
| - | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun May 4 22:39:22 2008'' | |
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | + | |
Revision as of 19:39, 4 May 2008
BINDING OF AN ANTITUMOR DRUG TO DNA. NETROPSIN AND C-G-C-G-A-A-T-T-BRC-G-C-G
Overview
The antitumor antibiotic netropsin has been co-crystallized with a double-helical B-DNA dodecanucleotide of sequence: C-G-C-G-A-A-T-T-BrC-G-C-G, and the structure of the complex has been solved by X-ray diffraction at a resolution of 2.2 A. The structure has been refined independently by Jack-Levitt and Hendrickson-Konnert least-squares methods, leading to a final residual error of 0.257 by the Jack-Levitt approach (0.211 for two-sigma data) or 0.248 by the Hendrickson-Konnert approach, with no significant difference between refined structures. The netropsin molecule displaces the spine of hydration and fits snugly within the minor groove in the A-A-T-T center. It widens the groove slightly and bends the helix axis back by 8 degrees, but neither unwinds nor elongates the double helix. The drug molecule is held in place by amide NH hydrogen bonds that bridge adenine N-3 and thymine O-2 atoms, exactly as with the spine of hydration. The requirement of A X T base-pairs in the binding site arises because the N-2 amino group of guanine would demand impermissibly close contacts with netropsin. It is proposed that substitution of imidazole for pyrrole in netropsin should create a family of "lexitropsins" capable of reading G X C-containing base sequences.
About this Structure
Full crystallographic information is available from OCA.
Reference
Binding of an antitumor drug to DNA, Netropsin and C-G-C-G-A-A-T-T-BrC-G-C-G., Kopka ML, Yoon C, Goodsell D, Pjura P, Dickerson RE, J Mol Biol. 1985 Jun 25;183(4):553-63. PMID:2991536 Page seeded by OCA on Sun May 4 22:39:22 2008
