2khf

Plantaricin J in DPC-micelles

spinqualitylabelsall models 2khf, 20 NMR models Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 2khf is a 1 chain structure with sequence from Lactobacillus plantarum. Full experimental information is available from OCA. For a guided tour on the structure components use FirstGlance. Gene: plnJ, lp_0406 (Lactobacillus plantarum) Resources: FirstGlance, OCA, RCSB, PDBsum Publication Abstract from PubMed The three-dimensional structures of the two peptides, PlnJ and PlnK, that constitutes the two-peptide bacteriocin plantaricin JK have been solved in water/TFE and water/DPC-micellar solutions using nuclear magnetic resonance (NMR) spectroscopy. PlnJ, a 25 residue peptide, has an N-terminal amphiphilic alpha-helix between Trp-3 and Tyr-15. The 32 residues long PlnK forms a central amphiphilic alpha-helix between Gly-9 and Leu-24. Measurements of the effect on anti-microbial activity of single glycine replacements in PlnJ and PlnK show that Gly-13 and Gly-17 in both peptides are very sensitive, giving more than a 100-fold reduction in activity when large residues replace glycine. In variants where other glycine residues, Gly-20 in PlnJ and Gly-7, Gly-9, Gly-24 and Gly-25 in PlnK, were replaced, the activity was reduced less than 10-fold. It is proposed that the detrimental effect on activity when exchanging Gly-13 and Gly-17 in PlnJ and PlnK is a result of reduced ability of the two peptides to interact through the GxxxG-motifs constituting Gly-13 and Gly-17. Three-dimensional structure of the two-peptide bacteriocin plantaricin JK.,Rogne P, Haugen C, Fimland G, Nissen-Meyer J, Kristiansen PE Peptides. 2009 Sep;30(9):1613-21. Epub 2009 Jun 16. PMID:19538999 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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