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{{STRUCTURE_1ido|  PDB=1ido  |  SCENE=  }}
==I-DOMAIN FROM INTEGRIN CR3, MG2+ BOUND==
===I-DOMAIN FROM INTEGRIN CR3, MG2+ BOUND===
<StructureSection load='1ido' size='340' side='right' caption='[[1ido]], [[Resolution|resolution]] 1.70&Aring;' scene=''>
{{ABSTRACT_PUBMED_7867070}}
== Structural highlights ==
 
<table><tr><td colspan='2'>[[1ido]] 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=1IDO OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1IDO FirstGlance]. <br>
==Disease==
</td></tr><tr><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene><br>
<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=1ido FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1ido OCA], [http://www.rcsb.org/pdb/explore.do?structureId=1ido RCSB], [http://www.ebi.ac.uk/pdbsum/1ido PDBsum]</span></td></tr>
<table>
== Disease ==
[[http://www.uniprot.org/uniprot/ITAM_HUMAN ITAM_HUMAN]] Genetic variations in ITGAM has been associated with susceptibility to systemic lupus erythematosus type 6 (SLEB6) [MIM:[http://omim.org/entry/609939 609939]]. Systemic lupus erythematosus (SLE) is a chronic, inflammatory and often febrile multisystemic disorder of connective tissue. It affects principally the skin, joints, kidneys and serosal membranes. It is thought to represent a failure of the regulatory mechanisms of the autoimmune system.  
[[http://www.uniprot.org/uniprot/ITAM_HUMAN ITAM_HUMAN]] Genetic variations in ITGAM has been associated with susceptibility to systemic lupus erythematosus type 6 (SLEB6) [MIM:[http://omim.org/entry/609939 609939]]. Systemic lupus erythematosus (SLE) is a chronic, inflammatory and often febrile multisystemic disorder of connective tissue. It affects principally the skin, joints, kidneys and serosal membranes. It is thought to represent a failure of the regulatory mechanisms of the autoimmune system.  
== Function ==
[[http://www.uniprot.org/uniprot/ITAM_HUMAN ITAM_HUMAN]] Integrin alpha-M/beta-2 is implicated in various adhesive interactions of monocytes, macrophages and granulocytes as well as in mediating the uptake of complement-coated particles. It is identical with CR-3, the receptor for the iC3b fragment of the third complement component. It probably recognizes the R-G-D peptide in C3b. Integrin alpha-M/beta-2 is also a receptor for fibrinogen, factor X and ICAM1. It recognizes P1 and P2 peptides of fibrinogen gamma chain.
== 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/id/1ido_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 ==
We have determined the high resolution crystal structure of the A domain from the alpha chain of integrin CR3. The domain adopts a classic alpha/beta "Rossmann" fold and contains an unusual Mg2+ coordination site at its surface. One of the coordinating ligands is the glutamate side chain from another A domain molecule. We suggest that this site represents a general metal ion-dependent adhesion site (MIDAS) for binding protein ligands. We further propose that the beta subunits of integrins contain a MIDAS motif within a modified A domain. Our crystal structure will allow reliable models to be built for other members of the A domain superfamily and should facilitate development of novel adhesion modulatory drugs.


==Function==
Crystal structure of the A domain from the alpha subunit of integrin CR3 (CD11b/CD18).,Lee JO, Rieu P, Arnaout MA, Liddington R Cell. 1995 Feb 24;80(4):631-8. PMID:7867070<ref>PMID:7867070</ref>
[[http://www.uniprot.org/uniprot/ITAM_HUMAN ITAM_HUMAN]] Integrin alpha-M/beta-2 is implicated in various adhesive interactions of monocytes, macrophages and granulocytes as well as in mediating the uptake of complement-coated particles. It is identical with CR-3, the receptor for the iC3b fragment of the third complement component. It probably recognizes the R-G-D peptide in C3b. Integrin alpha-M/beta-2 is also a receptor for fibrinogen, factor X and ICAM1. It recognizes P1 and P2 peptides of fibrinogen gamma chain.


==About this Structure==
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
[[1ido]] 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=1IDO OCA].
</div>


==See Also==
==See Also==
*[[Integrin|Integrin]]
*[[Integrin|Integrin]]
 
== References ==
==Reference==
<references/>
<ref group="xtra">PMID:007867070</ref><references group="xtra"/><references/>
__TOC__
</StructureSection>
[[Category: Homo sapiens]]
[[Category: Homo sapiens]]
[[Category: Lee, J O.]]
[[Category: Lee, J O.]]

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