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| | ==NMR assignment and structure of a peptide derived from the fusion peptide of HIV-1 gp41 in the presence of dodecylphosphocholine micelles== | | ==NMR assignment and structure of a peptide derived from the fusion peptide of HIV-1 gp41 in the presence of dodecylphosphocholine micelles== |
| - | <StructureSection load='5nwv' size='340' side='right'caption='[[5nwv]], [[NMR_Ensembles_of_Models | 20 NMR models]]' scene=''> | + | <StructureSection load='5nwv' size='340' side='right'caption='[[5nwv]]' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[5nwv]] is a 1 chain structure. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5NWV OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=5NWV FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[5nwv]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Human_immunodeficiency_virus_1 Human immunodeficiency virus 1]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5NWV OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=5NWV FirstGlance]. <br> |
| - | </td></tr><tr id='NonStdRes'><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=ACA:6-AMINOHEXANOIC+ACID'>ACA</scene></td></tr> | + | </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='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=5nwv FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5nwv OCA], [http://pdbe.org/5nwv PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=5nwv RCSB], [http://www.ebi.ac.uk/pdbsum/5nwv PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=5nwv ProSAT]</span></td></tr> | + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ACA:6-AMINOHEXANOIC+ACID'>ACA</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=5nwv FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5nwv OCA], [https://pdbe.org/5nwv PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=5nwv RCSB], [https://www.ebi.ac.uk/pdbsum/5nwv PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=5nwv ProSAT]</span></td></tr> |
| | </table> | | </table> |
| | + | == Function == |
| | + | [https://www.uniprot.org/uniprot/Q69894_9HIV1 Q69894_9HIV1] |
| | <div style="background-color:#fffaf0;"> | | <div style="background-color:#fffaf0;"> |
| | == Publication Abstract from PubMed == | | == Publication Abstract from PubMed == |
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| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| | + | [[Category: Human immunodeficiency virus 1]] |
| | [[Category: Large Structures]] | | [[Category: Large Structures]] |
| - | [[Category: Huarte, N]] | + | [[Category: Huarte N]] |
| - | [[Category: Jimenez, M A]] | + | [[Category: Jimenez MA]] |
| - | [[Category: Nieva, J L]] | + | [[Category: Nieva JL]] |
| - | [[Category: Serrano, S]] | + | [[Category: Serrano S]] |
| - | [[Category: Envelope glycoprotein gp41]]
| + | |
| - | [[Category: Fusion peptide]]
| + | |
| - | [[Category: Structure from cyana 2 1]]
| + | |
| - | [[Category: Viral protein]]
| + | |
| Structural highlights
Function
Q69894_9HIV1
Publication Abstract from PubMed
Despite extensive characterization of the human immunodeficiency virus type 1 (HIV-1) hydrophobic fusion peptide (FP), the structure-function relationships underlying its extraordinary degree of conservation remain poorly understood. Specifically, the fact that the tandem repeat of the FLGFLG tripeptide is absolutely conserved suggests that high hydrophobicity may not suffice to unleash FP function. Here, we have compared the nuclear magnetic resonance (NMR) structures adopted in nonpolar media by two FP surrogates, wtFP-tag and scrFP-tag, which had equal hydrophobicity but contained wild-type and scrambled core sequences LFLGFLG and FGLLGFL, respectively. In addition, these peptides were tagged at their C-termini with an epitope sequence that folded independently, thereby allowing Western blot detection without interfering with FP structure. We observed similar alpha-helical FP conformations for both specimens dissolved in the low-polarity medium 25% (v/v) 1,1,1,3,3,3-hexafluoro-2-propanol (HFIP), but important differences in contact with micelles of the membrane mimetic dodecylphosphocholine (DPC). Thus, whereas wtFP-tag preserved a helix displaying a Gly-rich ridge, the scrambled sequence lost in great part the helical structure upon being solubilized in DPC. Western blot analyses further revealed the capacity of wtFP-tag to assemble trimers in membranes, whereas membrane oligomers were not observed in the case of the scrFP-tag sequence. We conclude that, beyond hydrophobicity, preserving sequence order is an important feature for defining the secondary structures and oligomeric states adopted by the HIV FP in membranes.
Structure-Related Roles for the Conservation of the HIV-1 Fusion Peptide Sequence Revealed by Nuclear Magnetic Resonance.,Serrano S, Huarte N, Rujas E, Andreu D, Nieva JL, Jimenez MA Biochemistry. 2017 Oct 17;56(41):5503-5511. doi: 10.1021/acs.biochem.7b00745., Epub 2017 Sep 29. PMID:28930470[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ Serrano S, Huarte N, Rujas E, Andreu D, Nieva JL, Jimenez MA. Structure-Related Roles for the Conservation of the HIV-1 Fusion Peptide Sequence Revealed by Nuclear Magnetic Resonance. Biochemistry. 2017 Oct 17;56(41):5503-5511. doi: 10.1021/acs.biochem.7b00745., Epub 2017 Sep 29. PMID:28930470 doi:http://dx.doi.org/10.1021/acs.biochem.7b00745
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