1ohn | pdb_00001ohn

THREE-DIMENSIONAL STRUCTURE IN LIPID MICELLES OF THE PEDIOCIN-LIKE ANTIMICROBIAL PEPTIDE SAKACIN P.

spinqualitylabelsall models 1ohn, 10 NMR models Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 1ohn is a 1 chain structure with sequence from Lactobacillus sakei. Full experimental information is available from OCA. For a guided tour on the structure components use FirstGlance. Related: 1og7, 1ohm Resources: FirstGlance, OCA, RCSB, PDBsum Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMed The three-dimensional structures in dodecylphosphocholine (DPC) micelles and in trifluoroethanol (TFE) of the pediocin-like antimicrobial peptide sakacin P and an engineered variant of sakacin P (termed sakP[N24C+44C]) have been determined by use of nuclear magnetic resonance spectroscopy. SakP[N24C+44C] has an inserted non-native activity- and structure-stabilizing C-terminal disulfide bridge that ties the C-terminus to the middle part of the peptide. In the presence of DPC, the cationic N-terminal region (residues 1-17) of both peptides has an S-shaped conformation that is reminiscent of a three-stranded antiparallel beta-sheet and that is more pronounced when the peptide was dissolved in TFE instead of DPC. The four positively charged residues located in the N-terminal part are found pointing to the same direction. For both peptides, the N-terminal region is followed by a well-defined central amphiphilic alpha-helix (residues 18-33), and this in turn is followed by the C-terminal tail (residues 34-43 for sakacin P and 34-44 for sakP[N24C+44C]) that lacks any apparent common secondary structural motif. In the presence of DPC, the C-terminal tails in both peptides fold back onto the central alpha-helix, thereby creating a hairpin-like structure in the C-terminal halves. The lack of long-range NOEs between the beta-sheet Nu-terminal region and the hairpin-like C-terminal half indicates that there is a flexible hinge between these regions. We discuss which implications such a structural arrangement has on the interaction with the target cell membrane. Three-dimensional structure in lipid micelles of the pediocin-like antimicrobial peptide sakacin P and a sakacin P variant that is structurally stabilized by an inserted C-terminal disulfide bridge.,Uteng M, Hauge HH, Markwick PR, Fimland G, Mantzilas D, Nissen-Meyer J, Muhle-Goll C Biochemistry. 2003 Oct 7;42(39):11417-26. PMID:14516192 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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