1qu0

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[[Image:1qu0.jpg|left|200px]]<br /><applet load="1qu0" size="350" color="white" frame="true" align="right" spinBox="true"
 
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caption="1qu0, resolution 2.35&Aring;" />
 
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'''CRYSTAL STRUCTURE OF THE FIFTH LAMININ G-LIKE MODULE OF THE MOUSE LAMININ ALPHA2 CHAIN'''<br />
 
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==Overview==
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==CRYSTAL STRUCTURE OF THE FIFTH LAMININ G-LIKE MODULE OF THE MOUSE LAMININ ALPHA2 CHAIN==
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Laminin G-like (LG) modules in the extracellular matrix glycoproteins laminin, perlecan, and agrin mediate the binding to heparin and the cell surface receptor alpha-dystroglycan (alpha-DG). These interactions are crucial to basement membrane assembly, as well as muscle and nerve cell function. The crystal structure of the laminin alpha 2 chain LG5 module reveals a 14-stranded beta sandwich. A calcium ion is bound to one edge of the sandwich by conserved acidic residues and is surrounded by residues implicated in heparin and alpha-DG binding. A calcium-coordinated sulfate ion is suggested to mimic the binding of anionic oligosaccharides. The structure demonstrates a conserved function of the LG module in calcium-dependent lectin-like alpha-DG binding.
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<StructureSection load='1qu0' size='340' side='right'caption='[[1qu0]], [[Resolution|resolution]] 2.35&Aring;' scene=''>
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== Structural highlights ==
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<table><tr><td colspan='2'>[[1qu0]] 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=1QU0 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1QU0 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]] 2.35&#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=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</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=1qu0 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1qu0 OCA], [https://pdbe.org/1qu0 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1qu0 RCSB], [https://www.ebi.ac.uk/pdbsum/1qu0 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1qu0 ProSAT]</span></td></tr>
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</table>
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== Disease ==
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[https://www.uniprot.org/uniprot/LAMA2_MOUSE LAMA2_MOUSE] Note=Defects in Lama2 are a cause of murine muscular dystrophy (dy2J).
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== Function ==
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[https://www.uniprot.org/uniprot/LAMA2_MOUSE LAMA2_MOUSE] Binding to cells via a high affinity receptor, laminin is thought to mediate the attachment, migration and organization of cells into tissues during embryonic development by interacting with other extracellular matrix components.
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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/qu/1qu0_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=1qu0 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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1QU0 is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Mus_musculus Mus musculus] with <scene name='pdbligand=CA:'>CA</scene> and <scene name='pdbligand=SO4:'>SO4</scene> as [http://en.wikipedia.org/wiki/ligands ligands]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1QU0 OCA].
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*[[Laminin|Laminin]]
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__TOC__
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==Reference==
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</StructureSection>
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The crystal structure of a laminin G-like module reveals the molecular basis of alpha-dystroglycan binding to laminins, perlecan, and agrin., Hohenester E, Tisi D, Talts JF, Timpl R, Mol Cell. 1999 Nov;4(5):783-92. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=10619025 10619025]
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[[Category: Large Structures]]
[[Category: Mus musculus]]
[[Category: Mus musculus]]
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[[Category: Single protein]]
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[[Category: Hohenester E]]
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[[Category: Hohenester, E.]]
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[[Category: Talts JF]]
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[[Category: Talts, J F.]]
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[[Category: Timpl R]]
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[[Category: Timpl, R.]]
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[[Category: Tisi D]]
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[[Category: Tisi, D.]]
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[[Category: CA]]
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[[Category: SO4]]
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[[Category: beta sandwich]]
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[[Category: calcium-binding protein]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 14:43:43 2008''
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Current revision

CRYSTAL STRUCTURE OF THE FIFTH LAMININ G-LIKE MODULE OF THE MOUSE LAMININ ALPHA2 CHAIN

PDB ID 1qu0

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