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1g89

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{{STRUCTURE_1g89| PDB=1g89 | SCENE= }}
{{STRUCTURE_1g89| PDB=1g89 | SCENE= }}
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'''STRUCTURE OF THE BOVINE ANTIMICROBIAL PEPTIDE INDOLICIDIN BOUND TO DODECYLPHOSPHOCHOLINE MICELLES'''
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===STRUCTURE OF THE BOVINE ANTIMICROBIAL PEPTIDE INDOLICIDIN BOUND TO DODECYLPHOSPHOCHOLINE MICELLES===
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==Overview==
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Indolicidin is a cationic, 13-residue antimicrobial peptide (ILPWKWPWWPWRR-NH(2)) which is unusually rich in tryptophan and proline. Its antimicrobial action involves the bacterial cytoplasmic membrane. Fluorescence and circular dichroism spectra demonstrated the structural similarity of indolicidin in complexes with large unilamellar phospolipid vesicles and with detergent micelles. The structure of indolicidin bound to zwitterionic dodecylphosphocholine (DPC) and anionic sodium dodecyl sulfate (SDS) micelles was determined using NMR methods and shown to represent a unique membrane-associated peptide structure. The backbone structure in DPC, well defined between residues 3 and 11, was extended, with two half-turns at residues Lys-5 and Trp-8. The backbone structure in SDS, well defined between residues 5 and 11, was also extended, but lacked the bend in the C-terminal half. Indolicidin in complexes with DPC had a central hydrophobic core composed of proline and tryptophan, which was bracketed by positively charged regions near the peptide termini. The tryptophan side chains, with one exception, folded flat against the peptide backbone, thus giving the molecule a wedge shape. Indolicidin in complexes with SDS had an arrangement of hydrophobic and cationic regions similar to that found in the presence of DPC. The tryptophan side chains were less well defined than for indolicidin in DPC and extended away from the peptide backbone. The preferred location of indolicidin in DPC micelles and lipid bilayers, analyzed using spin-label probes, was at the membrane interface.
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(as it appears on PubMed at http://www.pubmed.gov), where 11123901 is the PubMed ID number.
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{{ABSTRACT_PUBMED_11123901}}
==About this Structure==
==About this Structure==
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1G89 is a [[Single protein]] structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1G89 OCA].
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1G89 is a [[Single protein]] structure. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1G89 OCA].
==Reference==
==Reference==
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[[Category: Half turn]]
[[Category: Half turn]]
[[Category: Poly-l-proline ii helix]]
[[Category: Poly-l-proline ii helix]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May 2 17:16:04 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Tue Jul 1 04:52:25 2008''

Revision as of 01:52, 1 July 2008

Image:1g89.png

Template:STRUCTURE 1g89

STRUCTURE OF THE BOVINE ANTIMICROBIAL PEPTIDE INDOLICIDIN BOUND TO DODECYLPHOSPHOCHOLINE MICELLES

Template:ABSTRACT PUBMED 11123901

About this Structure

1G89 is a Single protein structure. Full experimental information is available from OCA.

Reference

Structure of the bovine antimicrobial peptide indolicidin bound to dodecylphosphocholine and sodium dodecyl sulfate micelles., Rozek A, Friedrich CL, Hancock RE, Biochemistry. 2000 Dec 26;39(51):15765-74. PMID:11123901

Page seeded by OCA on Tue Jul 1 04:52:25 2008

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