View source for 5nnm


==The crystal structure of dimeric LL-37==
<StructureSection load='5nnm' size='340' side='right'caption='[[5nnm]], [[Resolution|resolution]] 1.90&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[5nnm]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5NNM OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=5NNM FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.9&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CO3:CARBONATE+ION'>CO3</scene></td></tr>
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=5nnm FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5nnm OCA], [https://pdbe.org/5nnm PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=5nnm RCSB], [https://www.ebi.ac.uk/pdbsum/5nnm PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=5nnm ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/CAMP_HUMAN CAMP_HUMAN] Binds to bacterial lipopolysaccharides (LPS), has antibacterial activity.<ref>PMID:16637646</ref> <ref>PMID:18818205</ref> 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Antimicrobial peptides as part of the mammalian innate immune system target and remove major bacterial pathogens, often through irreversible damage of their cellular membranes. To explore the mechanism by which the important cathelicidin peptide LL-37 of the human innate immune system interacts with membranes, we performed biochemical, biophysical and structural studies. The crystal structure of LL-37 displays dimers of anti-parallel helices and the formation of amphipathic surfaces. Peptide-detergent interactions introduce remodeling of this structure after occupation of defined hydrophobic sites at the dimer interface. Furthermore, hydrophobic nests are shaped between dimer structures providing another scaffold enclosing detergents. Both scaffolds underline the potential of LL-37 to form defined peptide-lipid complexes in vivo. After adopting the activated peptide conformation LL-37 can polymerize and selectively extract bacterial lipids whereby the membrane is destabilized. The supramolecular fibril-like architectures formed in crystals can be reproduced in a peptide-lipid system after nanogold-labelled LL-37 interacted with lipid vesicles as followed by electron microscopy. We suggest that these supramolecular structures represent the LL-37-membrane active state. Collectively, our study provides new insights into the fascinating plasticity of LL-37 demonstrated at atomic resolution and opens the venue for LL-37-based molecules as novel antibiotics.

Structural remodeling and oligomerization of human cathelicidin on membranes suggest fibril-like structures as active species.,Sancho-Vaello E, Francois P, Bonetti EJ, Lilie H, Finger S, Gil-Ortiz F, Gil-Carton D, Zeth K Sci Rep. 2017 Nov 13;7(1):15371. doi: 10.1038/s41598-017-14206-1. PMID:29133814<ref>PMID:29133814</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 5nnm" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Homo sapiens]]
[[Category: Large Structures]]
[[Category: Sancho-Vaello E]]
[[Category: Zeth K]]