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New page: left|200px<br /><applet load="1g6u" size="450" color="white" frame="true" align="right" spinBox="true" caption="1g6u, resolution 1.48Å" /> '''CRYSTAL STRUCTURE OF...
 
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[[Image:1g6u.jpg|left|200px]]<br /><applet load="1g6u" size="450" color="white" frame="true" align="right" spinBox="true"
caption="1g6u, resolution 1.48&Aring;" />
'''CRYSTAL STRUCTURE OF A DOMAIN SWAPPED DIMER'''<br />


==Overview==
==CRYSTAL STRUCTURE OF A DOMAIN SWAPPED DIMER==
Three-dimensional (3D) domain-swapped proteins are intermolecularly folded, analogs of monomeric proteins; both are stabilized by the identical, interactions, but the individual domains interact intramolecularly in, monomeric proteins, whereas they form intermolecular interactions in 3D, domain-swapped structures. The structures and conditions of formation of, several domain-swapped dimers and trimers are known, but the formation of, higher order 3D domain-swapped oligomers has been less thoroughly studied., Here we contrast the structural consequences of domain swapping from two, designed three-helix bundles: one with an up-down-up topology, and the, other with an up-down-down topology. The up-down-up topology gives rise to, a domain-swapped dimer whose structure has been determined to 1.5 A, resolution by x-ray crystallography. In contrast, the domain-swapped, protein with an up-down-down topology forms fibrils as shown by electron, microscopy and dynamic light scattering. This demonstrates that design, principles can predict the oligomeric state of 3D domain-swapped, molecules, which should aid in the design of domain-swapped proteins and, biomaterials.
<StructureSection load='1g6u' size='340' side='right'caption='[[1g6u]], [[Resolution|resolution]] 1.48&Aring;' scene=''>
 
== Structural highlights ==
==About this Structure==
<table><tr><td colspan='2'>[[1g6u]] is a 2 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1G6U OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1G6U FirstGlance]. <br>
1G6U is a [http://en.wikipedia.org/wiki/Protein_complex Protein complex] structure of sequences from [http://en.wikipedia.org/wiki/ ] with SO4 and TFA as [http://en.wikipedia.org/wiki/ligands ligands]. Full crystallographic information is available from [http://ispc.weizmann.ac.il/oca-bin/ocashort?id=1G6U OCA].  
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.48&#8491;</td></tr>
 
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene>, <scene name='pdbligand=TFA:TRIFLUOROACETIC+ACID'>TFA</scene></td></tr>
==Reference==
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1g6u FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1g6u OCA], [https://pdbe.org/1g6u PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1g6u RCSB], [https://www.ebi.ac.uk/pdbsum/1g6u PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1g6u ProSAT]</span></td></tr>
Design of three-dimensional domain-swapped dimers and fibrous oligomers., Ogihara NL, Ghirlanda G, Bryson JW, Gingery M, DeGrado WF, Eisenberg D, Proc Natl Acad Sci U S A. 2001 Feb 13;98(4):1404-9. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=11171963 11171963]
</table>
[[Category: Protein complex]]
__TOC__
[[Category: Bryson, J.W.]]
</StructureSection>
[[Category: DeGrado, W.F.]]
[[Category: Large Structures]]
[[Category: Eisenberg, D.]]
[[Category: Bryson JW]]
[[Category: Ghirlanda, G.]]
[[Category: DeGrado WF]]
[[Category: Gingery, M.]]
[[Category: Eisenberg D]]
[[Category: Ogihara, N.L.]]
[[Category: Ghirlanda G]]
[[Category: SO4]]
[[Category: Gingery M]]
[[Category: TFA]]
[[Category: Ogihara NL]]
[[Category: designed three helix bundle]]
 
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