View source for 1d9p


==SOLUTION STRUCTURE OF CECROPIN A(1-8)-MAGAININ 2(1-12) HYBRID PEPTIDE ANALOGUE(P4)==
<StructureSection load='1d9p' size='340' side='right'caption='[[1d9p]]' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[1d9p]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Hyalophora_cecropia Hyalophora cecropia] and [https://en.wikipedia.org/wiki/Xenopus_laevis Xenopus laevis]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1D9P OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1D9P FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Solution NMR, 20 models</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><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'>[https://proteopedia.org/fgij/fg.htm?mol=1d9p FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1d9p OCA], [https://pdbe.org/1d9p PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1d9p RCSB], [https://www.ebi.ac.uk/pdbsum/1d9p PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1d9p ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/MAGA_XENLA MAGA_XENLA] Antimicrobial peptides that inhibit the growth of numerous species of bacteria and fungi and induce osmotic lysis of protozoa. Magainins are membrane lytic agents.[https://www.uniprot.org/uniprot/CECA_HYACE CECA_HYACE] Cecropins have lytic and antibacterial activity against several Gram-positive and Gram-negative bacteria.
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== Publication Abstract from PubMed ==
In order to elucidate the structure-antibiotic activity relationships of the peptides, the three-dimensional structures of two hybrid peptides, CA(1-8) - MA(1-12) and CA(1-8) - ME(1-12) in trifluoroethanol-containing aqueous solution were investigated by NMR spectroscopy. Both CA(1-8) - MA(1-12) and CA(1-8) - ME(1-12) have strong antibacterial activity but only CA(1-8) - ME(1-12) has hemolytic activity against human erythrocytes. CA(1-8) - MA(1-12) has a hydrophobic 310-helix of only two turns combined with one short helix in the N-terminus with a flexible hinge section in between. CA(1-8) - MA(1-12) has a severely bent structure in the middle of the peptide. These structural features as well as the low hydrophobicity of CA(1-8) - MA(1-12) seem to be crucial for the selective lysis against the membrane of prokaryotic cells. CA(1-8) - ME(1-12) has an alpha-helical structure of about three turns in the melittin domain and a flexible structure with one turn in the cecropin domain connected with a flexible hinge section in between, and these might be the structural features required for membrane disruption against prokaryotic and eukaryotic cells. The central hinge region (Gly9-Ile10-Gly11) in an amphipathic antibacterial peptide is considered to play an important role in providing the conformational flexibility required for ion channel formation of the C-terminal hydrophobic alpha-helix on cell membrane.

NMR structural characterization of cecropin A(1-8) - magainin 2(1-12) and cecropin A (1-8) - melittin (1-12) hybrid peptides.,Oh D, Shin SY, Kang JH, Hahm KS, Kim KL, Kim Y J Pept Res. 1999 May;53(5):578-89. PMID:10424354<ref>PMID:10424354</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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<div class="pdbe-citations 1d9p" style="background-color:#fffaf0;"></div>

==See Also==
*[[Magainin 2|Magainin 2]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Hyalophora cecropia]]
[[Category: Large Structures]]
[[Category: Xenopus laevis]]
[[Category: Kim Y]]
[[Category: Oh D]]