1x22
From Proteopedia
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| + | |RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1x22 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1x22 OCA], [http://www.ebi.ac.uk/pdbsum/1x22 PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=1x22 RCSB]</span> | ||
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[[Category: solution structure]] | [[Category: solution structure]] | ||
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Revision as of 21:43, 30 March 2008
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| Resources: | FirstGlance, OCA, PDBsum, RCSB | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
Solution structure of a novel moricin analogue, an antibacterial peptide from a lepidopteran insect, Spodoptera litura
Overview
An antibacterial peptide was isolated from a lepidopteran insect, Spodoptera litura. The molecular mass of this peptide was determined to be 4489.55 by matrix assisted laser desorption/ionization-time of flight mass (MALDI-TOF MS) spectrometry. The peptide consists of 42 amino acids and the sequence has 69-98% identity to those of moricin-related peptides, antibacterial peptides from lepidopetran insects. Thus, the peptide was designated S. litura (Sl) moricin. Sl moricin showed a broad antibacterial spectrum against Gram-positive and negative bacteria. Sl moricin gene was inducible by bacterial injection and expressed tissue-specifically in the fat body and hemocytes. Furthermore, the solution structure of Sl moricin was determined by two-dimensional (2D) 1H-nuclear magnetic resonance (NMR) spectroscopy and hybrid distance geometry-simulated annealing calculation. The tertiary structure revealed a long alpha-helix containing eight turns along nearly the full length of the peptide like that of moricin, confirming that Sl moricin is a new moricin-like antibacterial peptide. These results suggest that moricin is present not only in B. mori but also in other lepidopteran insects forming a gene family.
About this Structure
1X22 is a Single protein structure of sequence from [1]. Full crystallographic information is available from OCA.
Reference
Isolation, gene expression and solution structure of a novel moricin analogue, antibacterial peptide from a lepidopteran insect, Spodoptera litura., Oizumi Y, Hemmi H, Minami M, Asaoka A, Yamakawa M, Biochim Biophys Acta. 2005 Aug 31;1752(1):83-92. PMID:16115804
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