6wpd
From Proteopedia
(Difference between revisions)
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==NMR Structure of HSP1-NH2 antimicrobial peptide in presence of DPC-d38 micelles== | ==NMR Structure of HSP1-NH2 antimicrobial peptide in presence of DPC-d38 micelles== | ||
| - | <StructureSection load='6wpd' size='340' side='right'caption='[[6wpd]]' scene=''> | + | <StructureSection load='6wpd' size='340' side='right'caption='[[6wpd]], [[NMR_Ensembles_of_Models | 10 NMR models]]' scene=''> |
== Structural highlights == | == Structural highlights == | ||
| - | <table><tr><td colspan='2'>Full | + | <table><tr><td colspan='2'>[[6wpd]] is a 1 chain structure. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6WPD OCA]. For a <b>guided tour on the structure components</b> use [http://proteopedia.org/fgij/fg.htm?mol=6WPD FirstGlance]. <br> |
| - | </td></tr><tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://proteopedia.org/fgij/fg.htm?mol=6wpd FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6wpd OCA], [http://pdbe.org/6wpd PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=6wpd RCSB], [http://www.ebi.ac.uk/pdbsum/6wpd PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=6wpd ProSAT]</span></td></tr> | + | </td></tr><tr id='NonStdRes'><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=NH2:AMINO+GROUP'>NH2</scene></td></tr> |
| + | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://proteopedia.org/fgij/fg.htm?mol=6wpd FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6wpd OCA], [http://pdbe.org/6wpd PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=6wpd RCSB], [http://www.ebi.ac.uk/pdbsum/6wpd PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=6wpd ProSAT]</span></td></tr> | ||
</table> | </table> | ||
| + | == Function == | ||
| + | [[http://www.uniprot.org/uniprot/HLP1_BOAPU HLP1_BOAPU]] Has antibacterial activity against the Gram-positive bacterium S.aureus, and the Gram-negative bacteria P.aeruginosa and E.coli. Has antifungal activity against C.albicans. No hemolytic activity has been detected.<ref>PMID:14715660</ref> [REFERENCE:2] | ||
| + | <div style="background-color:#fffaf0;"> | ||
| + | == Publication Abstract from PubMed == | ||
| + | Studies have suggested that antimicrobial peptides act by different mechanisms, such as micellisation, self-assembly of nanostructures and pore formation on the membrane surface. This work presents an extensive investigation of the membrane interactions of the 14 amino-acid antimicrobial peptide hylaseptin P1-NH2 (HSP1-NH2), derived from the tree-frog Hyla punctata, which has stronger antifungal than antibacterial potential. Biophysical and structural analyses were performed and the correlated results were used to describe in detail the interactions of HSP1-NH2 with zwitterionic and anionic detergent micelles and phospholipid vesicles. HSP1-NH2 presents similar well-defined helical conformations in both zwitterionic and anionic micelles, although NMR spectroscopy revealed important structural differences in the peptide N-terminus. (2)H exchange experiments of HSP1-NH2 indicated the insertion of the most N-terminal residues (1-3) in the DPC-d38 micelles. A higher enthalpic contribution was verified for the interaction of the peptide with anionic vesicles in comparison with zwitterionic vesicles. The pore formation ability of HSP1-NH2 (examined by dye release assays) and its effect on the size and surface charge as well as on the lipid acyl chain ordering (evaluated by Fourier-transform infrared spectroscopy) of anionic phospholipid vesicles showed membrane disruption even at low peptide-to-phospholipid ratios, and the effect increases proportionately to the peptide concentration. On the other hand, these biophysical investigations showed that a critical peptide-to-phospholipid ratio around 0.6 is essential for promoting disruption of zwitterionic membranes. In conclusion, this study demonstrates that the binding process of the antimicrobial HSP1-NH2 peptide depends on the membrane composition and peptide concentration. | ||
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| + | Membrane interactions of the anuran antimicrobial peptide HSP1-NH2: Different aspects of the association to anionic and zwitterionic biomimetic systems.,Gomes IP, Santos TL, de Souza AN, Nunes LO, Cardoso GA, Matos CO, Costa LMF, Liao LM, Resende JM, Verly RM Biochim Biophys Acta Biomembr. 2020 Aug 21;1863(1):183449. doi:, 10.1016/j.bbamem.2020.183449. PMID:32828849<ref>PMID:32828849</ref> | ||
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| + | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | ||
| + | </div> | ||
| + | <div class="pdbe-citations 6wpd" style="background-color:#fffaf0;"></div> | ||
| + | == References == | ||
| + | <references/> | ||
__TOC__ | __TOC__ | ||
</StructureSection> | </StructureSection> | ||
[[Category: Large Structures]] | [[Category: Large Structures]] | ||
| - | [[Category: Gomes | + | [[Category: Gomes, I P]] |
| - | [[Category: Verly | + | [[Category: Verly, R M]] |
| + | [[Category: Antimicrobial peptide]] | ||
| + | [[Category: Antimicrobial protein]] | ||
Revision as of 10:16, 16 September 2020
NMR Structure of HSP1-NH2 antimicrobial peptide in presence of DPC-d38 micelles
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