1hzi
From Proteopedia
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| - | + | ==INTERLEUKIN-4 MUTANT E9A== | |
| - | === | + | <StructureSection load='1hzi' size='340' side='right' caption='[[1hzi]], [[Resolution|resolution]] 2.05Å' scene=''> |
| - | + | == Structural highlights == | |
| + | <table><tr><td colspan='2'>[[1hzi]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1HZI OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1HZI FirstGlance]. <br> | ||
| + | </td></tr><tr><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene><br> | ||
| + | <tr><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1rcb|1rcb]], [[2int|2int]], [[1hik|1hik]], [[1hij|1hij]], [[1iar|1iar]]</td></tr> | ||
| + | <tr><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1hzi FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1hzi OCA], [http://www.rcsb.org/pdb/explore.do?structureId=1hzi RCSB], [http://www.ebi.ac.uk/pdbsum/1hzi PDBsum]</span></td></tr> | ||
| + | <table> | ||
| + | == Disease == | ||
| + | [[http://www.uniprot.org/uniprot/IL4_HUMAN IL4_HUMAN]] Genetic variations in IL4 may be a cause of susceptibility to ischemic stroke (ISCHSTR) [MIM:[http://omim.org/entry/601367 601367]]; also known as cerebrovascular accident or cerebral infarction. A stroke is an acute neurologic event leading to death of neural tissue of the brain and resulting in loss of motor, sensory and/or cognitive function. Ischemic strokes, resulting from vascular occlusion, is considered to be a highly complex disease consisting of a group of heterogeneous disorders with multiple genetic and environmental risk factors.<ref>PMID:14681304</ref> | ||
| + | == Function == | ||
| + | [[http://www.uniprot.org/uniprot/IL4_HUMAN IL4_HUMAN]] Participates in at least several B-cell activation processes as well as of other cell types. It is a costimulator of DNA-synthesis. It induces the expression of class II MHC molecules on resting B-cells. It enhances both secretion and cell surface expression of IgE and IgG1. It also regulates the expression of the low affinity Fc receptor for IgE (CD23) on both lymphocytes and monocytes. | ||
| + | == Evolutionary Conservation == | ||
| + | [[Image:Consurf_key_small.gif|200px|right]] | ||
| + | Check<jmol> | ||
| + | <jmolCheckbox> | ||
| + | <scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/hz/1hzi_consurf.spt"</scriptWhenChecked> | ||
| + | <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked> | ||
| + | <text>to colour the structure by Evolutionary Conservation</text> | ||
| + | </jmolCheckbox> | ||
| + | </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/chain_selection.php?pdb_ID=2ata ConSurf]. | ||
| + | <div style="clear:both"></div> | ||
| + | <div style="background-color:#fffaf0;"> | ||
| + | == Publication Abstract from PubMed == | ||
| + | Interleukin 4 (IL-4) is a pleiotropic cytokine which induces T-cell differentiation and class switching of B cells. It therefore plays a central role in the development of allergies and asthma. An IL-4 variant in which Glu9 was mutated to alanine shows an 800-fold drop in binding affinity towards its high-affinity receptor chain. As shown by surface plasmon resonance measurements, this mostly arises from a decreased association rate. Here, the crystal structure of this mutant is reported. It reveals that the protein has a virtually identical structure to the wild type, showing that the unusual behaviour of the mutated protein is not a consequence of misfolding. The possibility that polar interactions in the encounter complex have a steering effect is discussed. | ||
| - | + | Structure of interleukin 4 mutant E9A suggests polar steering in receptor-complex formation.,Hulsmeyer M, Scheufler C, Dreyer MK Acta Crystallogr D Biol Crystallogr. 2001 Sep;57(Pt 9):1334-6. Epub 2001, Aug 23. PMID:11526337<ref>PMID:11526337</ref> | |
| - | + | ||
| - | + | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |
| - | + | </div> | |
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==See Also== | ==See Also== | ||
*[[Interleukin|Interleukin]] | *[[Interleukin|Interleukin]] | ||
| - | + | == References == | |
| - | == | + | <references/> |
| - | + | __TOC__ | |
| + | </StructureSection> | ||
[[Category: Homo sapiens]] | [[Category: Homo sapiens]] | ||
[[Category: Dreyer, M K.]] | [[Category: Dreyer, M K.]] | ||
Revision as of 17:29, 29 September 2014
INTERLEUKIN-4 MUTANT E9A
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