1bp8

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[[Image:1bp8.gif|left|200px]]
[[Image:1bp8.gif|left|200px]]
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{{Structure
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|PDB= 1bp8 |SIZE=350|CAPTION= <scene name='initialview01'>1bp8</scene>
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The line below this paragraph, containing "STRUCTURE_1bp8", creates the "Structure Box" on the page.
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|SITE=
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You may change the PDB parameter (which sets the PDB file loaded into the applet)
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|LIGAND= <scene name='pdbligand=DA:2&#39;-DEOXYADENOSINE-5&#39;-MONOPHOSPHATE'>DA</scene>, <scene name='pdbligand=DC:2&#39;-DEOXYCYTIDINE-5&#39;-MONOPHOSPHATE'>DC</scene>, <scene name='pdbligand=DDA:2,6-DIDEOXY-BETA-D-GLUCOSE'>DDA</scene>, <scene name='pdbligand=DDL:2,6-DIDEOXY-BETA-D-GALACTOSE'>DDL</scene>, <scene name='pdbligand=DG:2&#39;-DEOXYGUANOSINE-5&#39;-MONOPHOSPHATE'>DG</scene>, <scene name='pdbligand=DT:THYMIDINE-5&#39;-MONOPHOSPHATE'>DT</scene>, <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>, <scene name='pdbligand=MDA:2,6-DIDEOXY-3+C-METHYL-D-RIBOPYRANOSIDE'>MDA</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>
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|DOMAIN=
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{{STRUCTURE_1bp8| PDB=1bp8 | SCENE= }}
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|RELATEDENTRY=
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|RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1bp8 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1bp8 OCA], [http://www.ebi.ac.uk/pdbsum/1bp8 PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=1bp8 RCSB]</span>
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}}
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'''4:2:1 MITHRAMYCIN:MG2+:D(ACCCGGGT)2 COMPLEX'''
'''4:2:1 MITHRAMYCIN:MG2+:D(ACCCGGGT)2 COMPLEX'''
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==About this Structure==
==About this Structure==
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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].
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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://www.ncbi.nlm.nih.gov/pubmed/10861371 10861371]
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]
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[[Category: Protein complex]]
 
[[Category: Keniry, M A.]]
[[Category: Keniry, M A.]]
[[Category: Owen, E A.]]
[[Category: Owen, E A.]]
[[Category: Shafer, R H.]]
[[Category: Shafer, R H.]]
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[[Category: dna]]
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[[Category: Dna]]
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[[Category: mithramycin]]
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[[Category: Mithramycin]]
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[[Category: nmr]]
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[[Category: Nmr]]
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[[Category: oligonucleotide]]
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[[Category: Oligonucleotide]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May 2 11:47:45 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun Mar 30 19:05:32 2008''
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Revision as of 08:47, 2 May 2008

Image:1bp8.gif

Template:STRUCTURE 1bp8

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

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 Fri May 2 11:47:45 2008

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