|
|
| Line 3: |
Line 3: |
| | <StructureSection load='3nte' size='340' side='right'caption='[[3nte]], [[Resolution|resolution]] 1.95Å' scene=''> | | <StructureSection load='3nte' size='340' side='right'caption='[[3nte]], [[Resolution|resolution]] 1.95Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[3nte]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/9hiv1 9hiv1]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3NTE OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3NTE FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[3nte]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Human_immunodeficiency_virus_1 Human immunodeficiency virus 1]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3NTE OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3NTE FirstGlance]. <br> |
| - | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=FE:FE+(III)+ION'>FE</scene>, <scene name='pdbligand=I3M:TRI-IODODE+ANION'>I3M</scene>, <scene name='pdbligand=IOD:IODIDE+ION'>IOD</scene>, <scene name='pdbligand=NA:SODIUM+ION'>NA</scene></td></tr> | + | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.95Å</td></tr> |
| - | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">CA, gag ([https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=11676 9HIV1])</td></tr>
| + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=FE:FE+(III)+ION'>FE</scene>, <scene name='pdbligand=I3M:TRI-IODODE+ANION'>I3M</scene>, <scene name='pdbligand=IOD:IODIDE+ION'>IOD</scene>, <scene name='pdbligand=NA:SODIUM+ION'>NA</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=3nte FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3nte OCA], [https://pdbe.org/3nte PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3nte RCSB], [https://www.ebi.ac.uk/pdbsum/3nte PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3nte ProSAT]</span></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=3nte FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3nte OCA], [https://pdbe.org/3nte PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3nte RCSB], [https://www.ebi.ac.uk/pdbsum/3nte PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3nte ProSAT]</span></td></tr> |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[https://www.uniprot.org/uniprot/Q77YG1_9HIV1 Q77YG1_9HIV1]] Capsid protein p24 forms the conical core of the virus that encapsulates the genomic RNA-nucleocapsid complex (By similarity). Nucleocapsid protein p7 encapsulates and protects viral dimeric unspliced (genomic) RNA. Binds these RNAs through its zinc fingers (By similarity).[SAAS:SAAS012344_004_011858]
| + | [https://www.uniprot.org/uniprot/Q77YG1_9HIV1 Q77YG1_9HIV1] Capsid protein p24 forms the conical core of the virus that encapsulates the genomic RNA-nucleocapsid complex (By similarity). Nucleocapsid protein p7 encapsulates and protects viral dimeric unspliced (genomic) RNA. Binds these RNAs through its zinc fingers (By similarity).[SAAS:SAAS012344_004_011858] |
| | <div style="background-color:#fffaf0;"> | | <div style="background-color:#fffaf0;"> |
| | == Publication Abstract from PubMed == | | == Publication Abstract from PubMed == |
| Line 26: |
Line 26: |
| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| | + | [[Category: Human immunodeficiency virus 1]] |
| | [[Category: Large Structures]] | | [[Category: Large Structures]] |
| - | [[Category: Betts, L]] | + | [[Category: Betts L]] |
| - | [[Category: Yeh, J I]] | + | [[Category: Yeh JI]] |
| - | [[Category: Viral protein]]
| + | |
| - | [[Category: Wild type viral protein]]
| + | |
| Structural highlights
Function
Q77YG1_9HIV1 Capsid protein p24 forms the conical core of the virus that encapsulates the genomic RNA-nucleocapsid complex (By similarity). Nucleocapsid protein p7 encapsulates and protects viral dimeric unspliced (genomic) RNA. Binds these RNAs through its zinc fingers (By similarity).[SAAS:SAAS012344_004_011858]
Publication Abstract from PubMed
The capsid (CA) protein plays crucial roles in HIV infection and replication, essential to viral maturation. The absence of high-resolution structural data on unassembled CA hinders the development of antivirals effective in inhibiting assembly. Unlike enzymes that have targetable, functional substrate-binding sites, the CA does not have a known site that affects catalytic or other innate activity, which can be more readily targeted in drug development efforts. We report the crystal structure of the HIV-1 CA, revealing the domain organization in the context of the wild-type full-length (FL) unassembled CA. The FL CA adopts an antiparallel dimer configuration, exhibiting a domain organization sterically incompatible with capsid assembly. A small compound, generated in situ during crystallization, is bound tightly at a hinge site ("H site"), indicating that binding at this interdomain region stabilizes the ADP conformation. Electron microscopy studies on nascent crystals reveal both dimeric and hexameric lattices coexisting within a single condition, in agreement with the interconvertibility of oligomeric forms and supporting the feasibility of promoting assembly-incompetent dimeric states. Solution characterization in the presence of the H-site ligand shows predominantly unassembled dimeric CA, even under conditions that promote assembly. Our structure elucidation of the HIV-1 FL CA and characterization of a potential allosteric binding site provides three-dimensional views of an assembly-defective conformation, a state targeted in, and thus directly relevant to, inhibitor development. Based on our findings, we propose an unprecedented means of preventing CA assembly, by "conformationally trapping" CA in assembly-incompetent conformational states induced by H-site binding.
Structure of the HIV-1 full-length capsid protein in a conformationally trapped unassembled state induced by small-molecule binding.,Du S, Betts L, Yang R, Shi H, Concel J, Ahn J, Aiken C, Zhang P, Yeh JI J Mol Biol. 2011 Feb 25;406(3):371-86. doi: 10.1016/j.jmb.2010.11.027. Epub 2010 , Dec 10. PMID:21146540[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Du S, Betts L, Yang R, Shi H, Concel J, Ahn J, Aiken C, Zhang P, Yeh JI. Structure of the HIV-1 full-length capsid protein in a conformationally trapped unassembled state induced by small-molecule binding. J Mol Biol. 2011 Feb 25;406(3):371-86. doi: 10.1016/j.jmb.2010.11.027. Epub 2010 , Dec 10. PMID:21146540 doi:http://dx.doi.org/10.1016/j.jmb.2010.11.027
|
