1gac

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[[Image:1gac.gif|left|200px]]
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{{STRUCTURE_1gac| PDB=1gac | SCENE= }}
{{STRUCTURE_1gac| PDB=1gac | SCENE= }}
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'''ASYMMETRIC HOMODIMER OF A82846B, A GLYCOPEPTIDE ANTIBIOTIC, COMPLEXED WITH ITS CELL WALL PENTAPEPTIDE FRAGMENT, NMR, 80 MODELS'''
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===ASYMMETRIC HOMODIMER OF A82846B, A GLYCOPEPTIDE ANTIBIOTIC, COMPLEXED WITH ITS CELL WALL PENTAPEPTIDE FRAGMENT, NMR, 80 MODELS===
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==Overview==
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Proton NMR assignments were determined for the asymmetric dimer complex of A82846B with the pentapeptide cell-wall fragment. A total of 683 experimental constraints, both distance and dihedral, were collected from NOESY and COSY data sets. From these constraints, a total of 80 structures were calculated using standard X-PLOR protocols. These structures were subsequently refined using the full CHARMm potential and the addition of water molecules in the calculation. The CHARMm structures occupied more conformational space than did the X-PLOR structures and were utilized for the structure analysis. From the structures, a unique set of interactions for the dALA-5 carboxylate pocket was observed, having backbone amides from residues 2 and 3 hydrogen bonding one carboxylate oxygen while amide 4 and the side chain amide from Asn-3 hydrogen bond the other oxygen. Also, near the N-terminal region of the ligand, the GGLU-2's carboxylate forms a hydrogen bond with the asymmetric disaccharide dyad, which helps to define the interactions seen for this part of the ligand.
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The line below this paragraph, {{ABSTRACT_PUBMED_7626632}}, adds the Publication Abstract to the page
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(as it appears on PubMed at http://www.pubmed.gov), where 7626632 is the PubMed ID number.
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{{ABSTRACT_PUBMED_7626632}}
==About this Structure==
==About this Structure==
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Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1GAC OCA].
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Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1GAC OCA].
==Reference==
==Reference==
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[[Category: Glycopeptide]]
[[Category: Glycopeptide]]
[[Category: Peptide]]
[[Category: Peptide]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May 2 17:20:42 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Tue Jul 1 04:59:11 2008''

Revision as of 01:59, 1 July 2008

Image:1gac.png

Template:STRUCTURE 1gac

ASYMMETRIC HOMODIMER OF A82846B, A GLYCOPEPTIDE ANTIBIOTIC, COMPLEXED WITH ITS CELL WALL PENTAPEPTIDE FRAGMENT, NMR, 80 MODELS

Template:ABSTRACT PUBMED 7626632

About this Structure

Full experimental information is available from OCA.

Reference

Conformation of A82846B, a glycopeptide antibiotic, complexed with its cell wall fragment: an asymmetric homodimer determined using NMR spectroscopy., Prowse WG, Kline AD, Skelton MA, Loncharich RJ, Biochemistry. 1995 Jul 25;34(29):9632-44. PMID:7626632

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