1bcw

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(New page: 200px<br /><applet load="1bcw" size="450" color="white" frame="true" align="right" spinBox="true" caption="1bcw, resolution 2.1&Aring;" /> '''RECOMBINANT RAT ANNEX...)
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[[Image:1bcw.jpg|left|200px]]<br /><applet load="1bcw" size="450" color="white" frame="true" align="right" spinBox="true"
 
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caption="1bcw, resolution 2.1&Aring;" />
 
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'''RECOMBINANT RAT ANNEXIN V, T72A MUTANT'''<br />
 
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==Overview==
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==RECOMBINANT RAT ANNEXIN V, T72A MUTANT==
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Annexin V belongs to a family of eukaryotic calcium-dependent, membrane-binding proteins. The calcium-binding sites at the, annexin-membrane interface have been investigated in some detail; however, little is known about the functional roles of highly conserved interfacial, residues that do not coordinate calcium themselves. In the present study, the importance of tryptophan 185, and threonine or serine at positions 72, 144, 228, and 303, in rat annexin V is investigated by site-directed, mutagenesis, X-ray crystallography, and functional assays. The, high-resolution crystal structures of the mutants show that the mutations, do not cause structural perturbations of the annexin molecule itself or, disappearance of bound calcium ions from calcium-binding sites. The assays, indicate that relative to wild-type annexin V, loss of the methyl, substituent at position 72 (Thr72--&gt;Ser) has no effect while loss of the, hydroxyl group (Thr72--&gt;Ala or Thr72--&gt;Lys) causes reduction of membrane, binding. Multiple lysine substitutions (e.g., Thr72,Ser144,Ser228,Ser303--&gt;Lys) have a greater adverse effect than the, single lysine mutation, suggesting that in annexin V the introduction of, potentially favorable electrostatic interactions between the lysine side, chains and the net negatively charged membrane surface is not sufficient, to overcome the loss of the hydroxyl side chains. Replacement of the, unique tryptophan, Trp185, by alanine similarly decreases membrane binding, affinity. Taken together, the data suggest that the side chains mutated in, this study contribute to phospholipid binding and participate directly in, intermolecular contacts with phospholipid membrane components.
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<StructureSection load='1bcw' size='340' side='right'caption='[[1bcw]], [[Resolution|resolution]] 2.10&Aring;' scene=''>
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== Structural highlights ==
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<table><tr><td colspan='2'>[[1bcw]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Rattus_norvegicus Rattus norvegicus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1BCW OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1BCW 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]] 2.1&#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=1bcw FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1bcw OCA], [https://pdbe.org/1bcw PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1bcw RCSB], [https://www.ebi.ac.uk/pdbsum/1bcw PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1bcw ProSAT]</span></td></tr>
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</table>
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== Function ==
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[https://www.uniprot.org/uniprot/ANXA5_RAT ANXA5_RAT] This protein is an anticoagulant protein that acts as an indirect inhibitor of the thromboplastin-specific complex, which is involved in the blood coagulation cascade.
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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/bc/1bcw_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=1bcw 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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1BCW is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Rattus_norvegicus Rattus norvegicus] with CA and SO4 as [http://en.wikipedia.org/wiki/ligands ligands]. Full crystallographic information is available from [http://ispc.weizmann.ac.il/oca-bin/ocashort?id=1BCW OCA].
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*[[Annexin 3D structures|Annexin 3D structures]]
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__TOC__
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==Reference==
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</StructureSection>
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Mutational and crystallographic analyses of interfacial residues in annexin V suggest direct interactions with phospholipid membrane components., Campos B, Mo YD, Mealy TR, Li CW, Swairjo MA, Balch C, Head JF, Retzinger G, Dedman JR, Seaton BA, Biochemistry. 1998 Jun 2;37(22):8004-10. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=9609693 9609693]
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[[Category: Large Structures]]
[[Category: Rattus norvegicus]]
[[Category: Rattus norvegicus]]
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[[Category: Single protein]]
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[[Category: Head JF]]
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[[Category: Head, J.F.]]
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[[Category: Li CW]]
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[[Category: Li, C.W.]]
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[[Category: Mo YD]]
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[[Category: Mo, Y.D.]]
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[[Category: Seaton BA]]
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[[Category: Seaton, B.A.]]
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[[Category: Swairjo MA]]
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[[Category: Swairjo, M.A.]]
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[[Category: CA]]
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[[Category: SO4]]
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[[Category: calcium binding protein]]
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[[Category: phospholipid membrane binding protein]]
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''Page seeded by [http://ispc.weizmann.ac.il/oca OCA ] on Tue Nov 20 11:33:06 2007''
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Current revision

RECOMBINANT RAT ANNEXIN V, T72A MUTANT

PDB ID 1bcw

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