1hd9: Difference between revisions
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[[Image:1hd9.jpg|left|200px]] | [[Image:1hd9.jpg|left|200px]] | ||
'''THE BOWMAN-BIRK INHIBITOR REACTIVE SITE LOOP SEQUENCE REPRESENTS AN INDEPENDENT STRUCTURAL BETA-HAIRPIN MOTIF''' | {{Structure | ||
|PDB= 1hd9 |SIZE=350|CAPTION= <scene name='initialview01'>1hd9</scene> | |||
|SITE= <scene name='pdbsite=P1:Primary+Specificity+Determinant+For+Inhib'>P1</scene> | |||
|LIGAND= | |||
|ACTIVITY= | |||
|GENE= | |||
}} | |||
'''THE BOWMAN-BIRK INHIBITOR REACTIVE SITE LOOP SEQUENCE REPRESENTS AN INDEPENDENT STRUCTURAL BETA-HAIRPIN MOTIF''' | |||
==Overview== | ==Overview== | ||
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==About this Structure== | ==About this Structure== | ||
1HD9 is a [ | 1HD9 is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/ ]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1HD9 OCA]. | ||
==Reference== | ==Reference== | ||
The Bowman-Birk inhibitor reactive site loop sequence represents an independent structural beta-hairpin motif., Brauer AB, Kelly G, McBride JD, Cooke RM, Matthews SJ, Leatherbarrow RJ, J Mol Biol. 2001 Mar 2;306(4):799-807. PMID:[http:// | The Bowman-Birk inhibitor reactive site loop sequence represents an independent structural beta-hairpin motif., Brauer AB, Kelly G, McBride JD, Cooke RM, Matthews SJ, Leatherbarrow RJ, J Mol Biol. 2001 Mar 2;306(4):799-807. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/11243789 11243789] | ||
[[Category: Single protein]] | [[Category: Single protein]] | ||
[[Category: Brauer, A B.E.]] | [[Category: Brauer, A B.E.]] | ||
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[[Category: type vib beta-turn peptide]] | [[Category: type vib beta-turn peptide]] | ||
''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 11:35:34 2008'' | ||
Revision as of 09:35, 20 March 2008
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| Sites: | P1 | ||||||||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||||||||
THE BOWMAN-BIRK INHIBITOR REACTIVE SITE LOOP SEQUENCE REPRESENTS AN INDEPENDENT STRUCTURAL BETA-HAIRPIN MOTIF
Overview
We have determined the NMR structure in aqueous solution of a disulphide-cyclised 11-residue peptide that forms a stable beta-hairpin, incorporating a type VIb beta-turn. The structure is found to be extremely well ordered for a short peptide, with the 30 lowest energy simulated annealing structures having an average pairwise r.m.s. deviation of only 0.36 A over the backbone. All but three side-chains adopt distinct conformations, allowing a detailed analysis of their involvement in cross-strand interactions. The peptide sequence analysed originates from a previously reported study, which identified potent inhibitors of human leukocyte elastase from screening a combinatorial peptide library based on the short protein beta-sheet segment that forms the reactive site loop of Bowman-Birk inhibitors. A detailed comparison of the peptide's solution structure with the corresponding region in the whole protein structure reveals a very good correspondence not only for the backbone (r.m.s. deviation approximately 0.7 A) but also for the side-chains. This isolated beta-hairpin retains the biologically active "canonical conformation" typical of small serine proteinase inhibitor proteins, which explains why it retains inhibitory activity. Since the structural integrity is sequence-inherent and does not depend upon the presence of the remaining protein, this beta-hairpin represents an independent structural motif and so provides a useful model of this type of protein architecture and its relation to biological function. The relationship between the conformation of this beta-hairpin and its biological activity is discussed.
About this Structure
1HD9 is a Single protein structure of sequence from [1]. Full crystallographic information is available from OCA.
Reference
The Bowman-Birk inhibitor reactive site loop sequence represents an independent structural beta-hairpin motif., Brauer AB, Kelly G, McBride JD, Cooke RM, Matthews SJ, Leatherbarrow RJ, J Mol Biol. 2001 Mar 2;306(4):799-807. PMID:11243789
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