View source for 7ckf


==The N-terminus of interferon-inducible antiviral protein-dimer==
<StructureSection load='7ckf' size='340' side='right'caption='[[7ckf]], [[Resolution|resolution]] 2.28&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=7CKF OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=7CKF 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]] 2.284&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=AF3:ALUMINUM+FLUORIDE'>AF3</scene>, <scene name='pdbligand=GDP:GUANOSINE-5-DIPHOSPHATE'>GDP</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</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=7ckf FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=7ckf OCA], [https://pdbe.org/7ckf PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=7ckf RCSB], [https://www.ebi.ac.uk/pdbsum/7ckf PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=7ckf ProSAT]</span></td></tr>
</table>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Guanylate-binding proteins (GBPs) form a family of dynamin-related large GTPases which mediate important innate immune functions. They were proposed to form oligomers upon GTP binding/hydrolysis, but the molecular mechanisms remain elusive. Here, we present crystal structures of C-terminally truncated human GBP5 (hGBP51-486), comprising the large GTPase (LG) and middle (MD) domains, in both its nucleotide-free monomeric and nucleotide-bound dimeric states, together with nucleotide-free full-length human GBP2. Upon GTP-loading, hGBP51-486 forms a closed face-to-face dimer. The MD of hGBP5 undergoes a drastic movement relative to its LG domain and forms extensive interactions with the LG domain and MD of the pairing molecule. Disrupting the MD interface (for hGBP5) or mutating the hinge region (for hGBP2/5) impairs their ability to inhibit HIV-1. Our results point to a GTP-induced dimerization mode that is likely conserved among all GBP members and provide insights into the molecular determinants of their antiviral function.

Structural basis for GTP-induced dimerization and antiviral function of guanylate-binding proteins.,Cui W, Braun E, Wang W, Tang J, Zheng Y, Slater B, Li N, Chen C, Liu Q, Wang B, Li X, Duan Y, Xiao Y, Ti R, Hotter D, Ji X, Zhang L, Cui J, Xiong Y, Sauter D, Wang Z, Kirchhoff F, Yang H Proc Natl Acad Sci U S A. 2021 Apr 13;118(15). pii: 2022269118. doi:, 10.1073/pnas.2022269118. PMID:33876762<ref>PMID:33876762</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 7ckf" style="background-color:#fffaf0;"></div>

==See Also==
*[[GTP-binding protein 3D structures|GTP-binding protein 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Cui W]]
[[Category: Yang HT]]