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1igf

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(New page: 200px<br /> <applet load="1igf" size="450" color="white" frame="true" align="right" spinBox="true" caption="1igf, resolution 2.8&Aring;" /> '''CRYSTAL STRUCTURES O...)
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[[Image:1igf.gif|left|200px]]<br />
 
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<applet load="1igf" size="450" color="white" frame="true" align="right" spinBox="true"
 
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caption="1igf, resolution 2.8&Aring;" />
 
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'''CRYSTAL STRUCTURES OF AN ANTIBODY TO A PEPTIDE AND ITS COMPLEX WITH PEPTIDE ANTIGEN AT 2.8 ANGSTROMS'''<br />
 
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==Overview==
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==CRYSTAL STRUCTURES OF AN ANTIBODY TO A PEPTIDE AND ITS COMPLEX WITH PEPTIDE ANTIGEN AT 2.8 ANGSTROMS==
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The three-dimensional structures of an antibody to a peptide and its, complex with the peptide antigen have been determined at 2.8 A resolution., The antigen is a synthetic 19-amino acid peptide homolog of the C helix of, myohemerythrin (Mhr). The unliganded Fab' crystals are orthorhombic with, two molecules per asymmetric unit, whereas the complex crystals are, hexagonal with one molecule per asymmetric unit. The Fab' and the, Fab'-peptide complex structures have been solved independently by, molecular replacement methods and have crystallographic R factors of 0.197, and 0.215, respectively, with no water molecules included. The, amino-terminal portion of the peptide sequence, (NH2-Glu-Val-Val-Pro-His-Lys-Lys) is clearly interpretable in the electron, density map of the Fab'-peptide complex and adopts a well-defined type II, beta-turn in the concave antigen binding pocket. This same peptide amino, acid sequence in native Mhr is alpha-helical. The peptide conformation, when bound to the Fab' is inconsistent with binding of the Fab' to native, Mhr, and suggests that binding of the Fab' to conformationally altered, forms of the native Mhr or to apo-Mhr. Immunological mapping previously, identified this sequence as the peptide epitope, and its fine specificity, correlates well with the structural analysis. The binding pocket includes, a large percentage of hydrophobic residues. The buried surfaces of the, peptide and the antibody are complementary in shape and cover 460 A2 and, 540 A2, respectively. These two structures now enable a comparison of a, specific monoclonal Fab' both in its free and antigen complexed state., While no major changes in the antibody were observed when peptide was, bound, there were some small but significant side chain and main chain, rearrangements.
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<StructureSection load='1igf' size='340' side='right'caption='[[1igf]], [[Resolution|resolution]] 2.80&Aring;' scene=''>
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== Structural highlights ==
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<table><tr><td colspan='2'>[[1igf]] is a 4 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=1IGF OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1IGF FirstGlance]. <br>
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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]] 2.8&#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=NAG:N-ACETYL-D-GLUCOSAMINE'>NAG</scene></td></tr>
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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=1igf FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1igf OCA], [https://pdbe.org/1igf PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1igf RCSB], [https://www.ebi.ac.uk/pdbsum/1igf PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1igf ProSAT]</span></td></tr>
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</table>
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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/ig/1igf_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=1igf ConSurf].
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<div style="clear:both"></div>
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==About this Structure==
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==See Also==
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1IGF is a [http://en.wikipedia.org/wiki/Protein_complex Protein complex] structure of sequences from [http://en.wikipedia.org/wiki/ ] with NAG as [http://en.wikipedia.org/wiki/ligand ligand]. Full crystallographic information is available from [http://ispc.weizmann.ac.il/oca-bin/ocashort?id=1IGF OCA].
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*[[Antibody 3D structures|Antibody 3D structures]]
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*[[Sandbox 20009|Sandbox 20009]]
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==Reference==
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*[[3D structures of non-human antibody|3D structures of non-human antibody]]
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Crystal structures of an antibody to a peptide and its complex with peptide antigen at 2.8 A., Stanfield RL, Fieser TM, Lerner RA, Wilson IA, Science. 1990 May 11;248(4956):712-9. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=2333521 2333521]
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__TOC__
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[[Category: Protein complex]]
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</StructureSection>
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[[Category: Stanfield, R.L.]]
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[[Category: Large Structures]]
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[[Category: Wilson, I.A.]]
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[[Category: Mus musculus]]
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[[Category: NAG]]
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[[Category: Stanfield RL]]
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[[Category: immunoglobulin]]
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[[Category: Wilson IA]]
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''Page seeded by [http://ispc.weizmann.ac.il/oca OCA ] on Sun Nov 18 09:33:01 2007''
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Current revision

CRYSTAL STRUCTURES OF AN ANTIBODY TO A PEPTIDE AND ITS COMPLEX WITH PEPTIDE ANTIGEN AT 2.8 ANGSTROMS

PDB ID 1igf

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