1bp8
From Proteopedia
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| - | [[Image:1bp8.gif|left|200px]]< | + | [[Image:1bp8.gif|left|200px]] |
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| - | '''4:2:1 MITHRAMYCIN:MG2+:D(ACCCGGGT)2 COMPLEX''' | + | {{Structure |
| + | |PDB= 1bp8 |SIZE=350|CAPTION= <scene name='initialview01'>1bp8</scene> | ||
| + | |SITE= | ||
| + | |LIGAND= <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=MDA:2,6-DIDEOXY-3+C-METHYL-D-RIBOPYRANOSIDE'>MDA</scene> and <scene name='pdbligand=DXB:1,2-HYDRO-1-OXY-3,4-HYDRO-3-(1-METHOXY-2-OXY-3,4-DIHYDROXYPENTYL)-8,9-DIHYDROXY-7-METHYL-ANTHRACENE'>DXB</scene> | ||
| + | |ACTIVITY= | ||
| + | |GENE= | ||
| + | }} | ||
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| + | '''4:2:1 MITHRAMYCIN:MG2+:D(ACCCGGGT)2 COMPLEX''' | ||
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==Overview== | ==Overview== | ||
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==About this Structure== | ==About this Structure== | ||
| - | 1BP8 is a [ | + | 1BP8 is a [[Protein complex]] structure of sequences from [http://en.wikipedia.org/wiki/ ]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1BP8 OCA]. |
==Reference== | ==Reference== | ||
| - | The three-dimensional structure of the 4:1 mithramycin:d(ACCCGGGT)(2) complex: evidence for an interaction between the E saccharides., Keniry MA, Owen EA, Shafer RH, Biopolymers. 2000 Aug;54(2):104-14. PMID:[http:// | + | The three-dimensional structure of the 4:1 mithramycin:d(ACCCGGGT)(2) complex: evidence for an interaction between the E saccharides., Keniry MA, Owen EA, Shafer RH, Biopolymers. 2000 Aug;54(2):104-14. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/10861371 10861371] |
[[Category: Protein complex]] | [[Category: Protein complex]] | ||
[[Category: Keniry, M A.]] | [[Category: Keniry, M A.]] | ||
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[[Category: oligonucleotide]] | [[Category: oligonucleotide]] | ||
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Mar 20 10:14:01 2008'' |
Revision as of 08:14, 20 March 2008
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| Coordinates: | save as pdb, mmCIF, xml | ||||||
4:2:1 MITHRAMYCIN:MG2+:D(ACCCGGGT)2 COMPLEX
Overview
Mithramycin and chromomycin, two antitumor drugs, each having an identical aglycone and nearly identical disaccharide and trisaccharide side chains, have differing binding properties to a small oligonucleotide, d(ACCCGGGT)(2) (M. A. Keniry et al., Journal of Molecular Biology, 1993, Vol. 231, pp. 753-767). In order to understand the forces that induce four mithramycin molecules to bind to d(ACCCGGGT)(2) instead of two drug molecules in the case of chromomycin, the structure of the 4:2:1 mithramycin: Mg(2+):d(ACCCGGGT)(2) complex was investigated by (1)H-nmr and restrained molecular dynamics. The resulting three-dimensional model showed that in order to accommodate the close approach of one neighboring mithramycin dimer, the inwardly directed CDE saccharide chain of the neighboring mithramycin dimer undergoes a conformational change such that the E saccharide no longer spans the minor groove but reorients so that the hydrophilic face of the E saccharides from the two dimers oppose each other. Two hydrogen bonds are formed between the hydroxyl groups of the two opposing E saccharide groups. The results are interpreted in terms of the differences in stereochemistry and functional group substitutions between mithramycin and chromomycin. A mithramycin dimer is able to self-associate on an oligonucleotide template because it has two hydroxyl groups on the same face of its terminal E saccharide. A chromomycin dimer is unable to self-associate because one of these hydroxyl groups is acetylated and the neighboring hydroxyl group has a stereochemistry that cannot permit close contact of the hydroxyl group with a neighbouring chromomycin dimer.Copyright 2000 John Wiley & Sons, Inc.
About this Structure
1BP8 is a Protein complex structure of sequences from [1]. Full crystallographic information is available from OCA.
Reference
The three-dimensional structure of the 4:1 mithramycin:d(ACCCGGGT)(2) complex: evidence for an interaction between the E saccharides., Keniry MA, Owen EA, Shafer RH, Biopolymers. 2000 Aug;54(2):104-14. PMID:10861371
Page seeded by OCA on Thu Mar 20 10:14:01 2008
Categories: Protein complex | Keniry, M A. | Owen, E A. | Shafer, R H. | DXB | MDA | MG | Dna | Mithramycin | Nmr | Oligonucleotide
