1cix: Difference between revisions
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[[ | ==THREE-DIMENSIONAL STRUCTURE OF ANTIMICROBIAL PEPTIDE TACHYSTATIN A ISOLATED FROM HORSESHOE CRAB== | ||
<StructureSection load='1cix' size='340' side='right' caption='[[1cix]], [[NMR_Ensembles_of_Models | 24 NMR models]]' scene=''> | |||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[1cix]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Tachypleus_tridentatus Tachypleus tridentatus]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1CIX OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1CIX FirstGlance]. <br> | |||
</td></tr><tr><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1cix FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1cix OCA], [http://www.rcsb.org/pdb/explore.do?structureId=1cix RCSB], [http://www.ebi.ac.uk/pdbsum/1cix PDBsum]</span></td></tr> | |||
<table> | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
The solution structure of antimicrobial peptide tachystatin A from the Japanese horseshoe crab (Tachypleus tridentatus) was determined by two-dimensional nuclear magnetic resonance measurements and distance-restrained simulated annealing calculations. The correct pairs of disulfide bonds were also confirmed in this study. The obtained structure has a cysteine-stabilized triple-stranded beta-sheet as a dominant secondary structure and shows an amphiphilic folding observed in many membrane-interactive peptides. Interestingly, tachystatin A shares structural similarities with the calcium channel antagonist omega-agatoxin IVA isolated from spider toxin and mammalian defensins, and we predicted that omega-agatoxin IVA also have the antifungal activity. These structural comparisons and functional correspondences suggest that tachystatin A and omega-agatoxin IVA may exert the antimicrobial activity in a manner similar to defensins, and we have confirmed such activity using fungal culture assays. Furthermore, tachystatin A is a chitin-binding peptide, and omega-agatoxin IVA also showed chitin-binding activities in this study. Tachystatin A and omega-agatoxin IVA showed no structural homology with well known chitin-binding motifs, suggesting that their structures belong to a novel family of chitin-binding peptides. Comparison of their structures with those of cellulose-binding proteins indicated that Phe(9) of tachystatin A might be an essential residue for binding to chitin. | |||
Structure of the antimicrobial peptide tachystatin A.,Fujitani N, Kawabata S, Osaki T, Kumaki Y, Demura M, Nitta K, Kawano K J Biol Chem. 2002 Jun 28;277(26):23651-7. Epub 2002 Apr 16. PMID:11959852<ref>PMID:11959852</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
</div> | |||
== References == | |||
<references/> | |||
== | __TOC__ | ||
</StructureSection> | |||
[[Category: Tachypleus tridentatus]] | [[Category: Tachypleus tridentatus]] | ||
[[Category: Demura, M.]] | [[Category: Demura, M.]] | ||
