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2amn

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[[Image:2amn.gif|left|200px]]
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{{STRUCTURE_2amn| PDB=2amn | SCENE= }}
{{STRUCTURE_2amn| PDB=2amn | SCENE= }}
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'''Solution structure of Fowlicidin-1, a novel Cathelicidin antimicrobial peptide from chicken'''
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===Solution structure of Fowlicidin-1, a novel Cathelicidin antimicrobial peptide from chicken===
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==Overview==
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Cationic antimicrobial peptides are naturally occurring antibiotics that are actively being explored as a new class of anti-infective agents. We recently identified three cathelicidin antimicrobial peptides from chicken, which have potent and broad-spectrum antibacterial activities in vitro (Xiao Y, Cai Y, Bommineni YR, Fernando SC, Prakash O, Gilliland SE &amp; Zhang G (2006) J Biol Chem281, 2858-2867). Here we report that fowlicidin-1 mainly adopts an alpha-helical conformation with a slight kink induced by glycine close to the center, in addition to a short flexible unstructured region near the N terminus. To gain further insight into the structural requirements for function, a series of truncation and substitution mutants of fowlicidin-1 were synthesized and tested separately for their antibacterial, cytolytic and lipopolysaccharide (LPS)-binding activities. The short C-terminal helical segment after the kink, consisting of a stretch of eight amino acids (residues 16-23), was shown to be critically involved in all three functions, suggesting that this region may be required for the peptide to interact with LPS and lipid membranes and to permeabilize both prokaryotic and eukaryotic cells. We also identified a second segment, comprising three amino acids (residues 5-7) in the N-terminal flexible region, that participates in LPS binding and cytotoxicity but is less important in bacterial killing. The fowlicidin-1 analog, with deletion of the second N-terminal segment (residues 5-7), was found to retain substantial antibacterial potency with a significant reduction in cytotoxicity. Such a peptide analog may have considerable potential for development as an anti-infective agent.
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The line below this paragraph, {{ABSTRACT_PUBMED_16817888}}, adds the Publication Abstract to the page
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(as it appears on PubMed at http://www.pubmed.gov), where 16817888 is the PubMed ID number.
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{{ABSTRACT_PUBMED_16817888}}
==About this Structure==
==About this Structure==
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2AMN is a [[Single protein]] structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2AMN OCA].
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2AMN is a [[Single protein]] structure. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2AMN OCA].
==Reference==
==Reference==
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[[Category: Zhang, G.]]
[[Category: Zhang, G.]]
[[Category: Linear helix]]
[[Category: Linear helix]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 19:13:33 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Tue Jul 29 07:26:34 2008''

Revision as of 04:26, 29 July 2008

Image:2amn.png

Template:STRUCTURE 2amn

Solution structure of Fowlicidin-1, a novel Cathelicidin antimicrobial peptide from chicken

Template:ABSTRACT PUBMED 16817888

About this Structure

2AMN is a Single protein structure. Full experimental information is available from OCA.

Reference

Structure-activity relationships of fowlicidin-1, a cathelicidin antimicrobial peptide in chicken., Xiao Y, Dai H, Bommineni YR, Soulages JL, Gong YX, Prakash O, Zhang G, FEBS J. 2006 Jun;273(12):2581-93. PMID:16817888

Page seeded by OCA on Tue Jul 29 07:26:34 2008

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