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1dbb

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[[Image:1dbb.jpg|left|200px]]
 
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==THREE-DIMENSIONAL STRUCTURE OF AN ANTI-STEROID FAB' AND PROGESTERONE-FAB' COMPLEX==
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The line below this paragraph, containing "STRUCTURE_1dbb", creates the "Structure Box" on the page.
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<StructureSection load='1dbb' size='340' side='right'caption='[[1dbb]], [[Resolution|resolution]] 2.70&Aring;' scene=''>
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You may change the PDB parameter (which sets the PDB file loaded into the applet)
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== Structural highlights ==
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or the SCENE parameter (which sets the initial scene displayed when the page is loaded),
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<table><tr><td colspan='2'>[[1dbb]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Mus_musculus Mus musculus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1DBB OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1DBB FirstGlance]. <br>
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or leave the SCENE parameter empty for the default display.
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</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.7&#8491;</td></tr>
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<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=STR:PROGESTERONE'>STR</scene></td></tr>
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{{STRUCTURE_1dbb| PDB=1dbb | SCENE= }}
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<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1dbb FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1dbb OCA], [https://pdbe.org/1dbb PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1dbb RCSB], [https://www.ebi.ac.uk/pdbsum/1dbb PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1dbb ProSAT]</span></td></tr>
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</table>
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== Function ==
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[https://www.uniprot.org/uniprot/IGHG1_MOUSE IGHG1_MOUSE]
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== Evolutionary Conservation ==
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[[Image:Consurf_key_small.gif|200px|right]]
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Check<jmol>
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<jmolCheckbox>
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<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/db/1dbb_consurf.spt"</scriptWhenChecked>
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<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
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<text>to colour the structure by Evolutionary Conservation</text>
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</jmolCheckbox>
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</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/main_output.php?pdb_ID=1dbb ConSurf].
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<div style="clear:both"></div>
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'''THREE-DIMENSIONAL STRUCTURE OF AN ANTI-STEROID FAB' AND PROGESTERONE-FAB' COMPLEX'''
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==See Also==
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*[[Antibody 3D structures|Antibody 3D structures]]
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*[[3D structures of non-human antibody|3D structures of non-human antibody]]
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==Overview==
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__TOC__
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The monoclonal anti-progesterone antibody DB3 binds progesterone with nanomolar affinity (Ka approximately 10(9) M-1), suggesting high specificity. However, DB3 also cross-reacts with similar affinity with a subgroup of structurally distinct, progesterone-like steroids. Crystals of the unliganded Fab' and various steroid-Fab' complexes are isomorphous and belong to the hexagonal space group, P6(4)22, with unit cell dimensions of a = b = 135 A, c = 124 A. Structures of free and progesterone-bound Fab' have been determined by X-ray crystallography at 2.7 A resolution using molecular replacement techniques. Progesterone is bound in a hydrophobic pocket formed mainly by the interaction of three complementarity determining regions L1, H2 and H3. The orientation of the ligand in the binding site was aided by both crystallographic and biochemical analyses of substituted steroids. The indole side-chain of TrpH100 of the DB3 has two different conformations, inter-converting "open" and "closed" forms of the antibody combining site. The TrpH100 indole thus appears to be acting as an antibody-derived surrogate ligand for its own hydrophobic binding pocket. These structures provide the first atomic view of how a steroid interacts with a protein and offer a structural explanation for the restriction of the anti-progesterone response to the VGAM3.8 family of VH genes.
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</StructureSection>
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[[Category: Large Structures]]
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==About this Structure==
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[[Category: Mus musculus]]
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1DBB is a [[Protein complex]] structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1DBB OCA].
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[[Category: Arevalo JH]]
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[[Category: Wilson IA]]
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==Reference==
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Three-dimensional structure of an anti-steroid Fab' and progesterone-Fab' complex., Arevalo JH, Stura EA, Taussig MJ, Wilson IA, J Mol Biol. 1993 May 5;231(1):103-18. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/8496956 8496956]
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[[Category: Protein complex]]
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[[Category: Arevalo, J H.]]
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[[Category: Wilson, I A.]]
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[[Category: Immunoglobulin]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May 2 13:39:21 2008''
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Current revision

THREE-DIMENSIONAL STRUCTURE OF AN ANTI-STEROID FAB' AND PROGESTERONE-FAB' COMPLEX

PDB ID 1dbb

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