1usg

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(New page: 200px<br /><applet load="1usg" size="450" color="white" frame="true" align="right" spinBox="true" caption="1usg, resolution 1.53&Aring;" /> '''L-LEUCINE-BINDING PR...)
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[[Image:1usg.jpg|left|200px]]<br /><applet load="1usg" size="450" color="white" frame="true" align="right" spinBox="true"
 
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caption="1usg, resolution 1.53&Aring;" />
 
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'''L-LEUCINE-BINDING PROTEIN, APO FORM'''<br />
 
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==Overview==
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==L-leucine-binding protein, apo form==
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The periplasmic leucine-binding protein is the primary receptor for the, leucine transport system in Escherichia coli. We report here the structure, of an open ligand-free form solved by molecular replacement and refined at, 1.5-A resolution. In addition, two closed ligand-bound structures of the, same protein are presented, a phenylalanine-bound form at 1.8 A and a, leucine-bound structure at a nominal resolution of 2.4 A. These structures, show the basis of this protein's ligand specificity, as well as, illustrating the conformational changes that are associated with ligand, binding. Comparison with earlier structures provides further information, about solution conformations, as well as the different specificity of the, closely related leucine/isoleucine/valine-binding protein.
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<StructureSection load='1usg' size='340' side='right'caption='[[1usg]], [[Resolution|resolution]] 1.53&Aring;' scene=''>
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== Structural highlights ==
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<table><tr><td colspan='2'>[[1usg]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1USG OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1USG 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]] 1.53&#8491;</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=1usg FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1usg OCA], [https://pdbe.org/1usg PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1usg RCSB], [https://www.ebi.ac.uk/pdbsum/1usg PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1usg ProSAT]</span></td></tr>
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</table>
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== Function ==
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[https://www.uniprot.org/uniprot/LIVK_ECOLI LIVK_ECOLI] This protein is a component of the leucine-specific transport system, which is one of the two periplasmic binding protein-dependent transport systems of the high-affinity transport of the branched-chain amino acids in E.coli.
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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/us/1usg_consurf.spt"</scriptWhenChecked>
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<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview03.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=1usg ConSurf].
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<div style="clear:both"></div>
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<div style="background-color:#fffaf0;">
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== Publication Abstract from PubMed ==
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The periplasmic leucine-binding protein is the primary receptor for the leucine transport system in Escherichia coli. We report here the structure of an open ligand-free form solved by molecular replacement and refined at 1.5-A resolution. In addition, two closed ligand-bound structures of the same protein are presented, a phenylalanine-bound form at 1.8 A and a leucine-bound structure at a nominal resolution of 2.4 A. These structures show the basis of this protein's ligand specificity, as well as illustrating the conformational changes that are associated with ligand binding. Comparison with earlier structures provides further information about solution conformations, as well as the different specificity of the closely related leucine/isoleucine/valine-binding protein.
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==About this Structure==
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X-ray structures of the leucine-binding protein illustrate conformational changes and the basis of ligand specificity.,Magnusson U, Salopek-Sondi B, Luck LA, Mowbray SL J Biol Chem. 2004 Mar 5;279(10):8747-52. Epub 2003 Dec 12. PMID:14672931<ref>PMID:14672931</ref>
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1USG is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli]. Full crystallographic information is available from [http://ispc.weizmann.ac.il/oca-bin/ocashort?id=1USG OCA].
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==Reference==
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From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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X-ray structures of the leucine-binding protein illustrate conformational changes and the basis of ligand specificity., Magnusson U, Salopek-Sondi B, Luck LA, Mowbray SL, J Biol Chem. 2004 Mar 5;279(10):8747-52. Epub 2003 Dec 12. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=14672931 14672931]
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</div>
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<div class="pdbe-citations 1usg" style="background-color:#fffaf0;"></div>
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== References ==
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<references/>
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__TOC__
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</StructureSection>
[[Category: Escherichia coli]]
[[Category: Escherichia coli]]
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[[Category: Single protein]]
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[[Category: Large Structures]]
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[[Category: Luck, L.A.]]
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[[Category: Luck LA]]
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[[Category: Magnusson, U.]]
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[[Category: Magnusson U]]
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[[Category: Mowbray, S.L.]]
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[[Category: Mowbray SL]]
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[[Category: Salopek-Sondi, B.]]
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[[Category: Salopek-Sondi B]]
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[[Category: abc transport systems]]
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[[Category: leucine-binding protein]]
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[[Category: protein structure]]
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[[Category: transport protein]]
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[[Category: x-ray crystallography]]
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''Page seeded by [http://ispc.weizmann.ac.il/oca OCA ] on Wed Nov 21 04:18:22 2007''
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Current revision

L-leucine-binding protein, apo form

PDB ID 1usg

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