1gx8: Difference between revisions

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-[[Image:1gx8.gif|left|200px]]
-<!--
-The line below this paragraph, containing "STRUCTURE_1gx8", creates the "Structure Box" on the page.
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-or the SCENE parameter (which sets the initial scene displayed when the page is loaded),
-or leave the SCENE parameter empty for the default display.
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-{{STRUCTURE_1gx8|  PDB=1gx8  |  SCENE=  }}
-'''BOVINE BETA-LACTOGLOBULIN COMPLEXED WITH RETINOL, TRIGONAL LATTICE Z'''
+==BOVINE BETA-LACTOGLOBULIN COMPLEXED WITH RETINOL, TRIGONAL LATTICE Z==
+<StructureSection load='1gx8' size='340' side='right'caption='[[1gx8]], [[Resolution|resolution]] 2.40&Aring;' scene=''>
+== Structural highlights ==
+<table><tr><td colspan='2'>[[1gx8]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Bos_taurus Bos taurus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1GX8 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1GX8 FirstGlance]. <br>
+</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.4&#8491;</td></tr>
+<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=RTL:RETINOL'>RTL</scene></td></tr>
+<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1gx8 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1gx8 OCA], [https://pdbe.org/1gx8 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1gx8 RCSB], [https://www.ebi.ac.uk/pdbsum/1gx8 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1gx8 ProSAT]</span></td></tr>
+</table>
+== Function ==
+[https://www.uniprot.org/uniprot/LACB_BOVIN LACB_BOVIN] Primary component of whey, it binds retinol and is probably involved in the transport of that molecule.
+== 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/gx/1gx8_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/main_output.php?pdb_ID=1gx8 ConSurf].
+<div style="clear:both"></div>
+<div style="background-color:#fffaf0;">
+== Publication Abstract from PubMed ==
+Ever since the fortuitous observation that beta-lactoglobulin (beta-Lg), the major whey protein in the milk of ruminants, bound retinol, the details of the binding have been controversial. beta-Lg is a lipocalin, like plasma retinol-binding protein, so that ligand association was expected to make use of the central cavity in the protein. However, an early crystallographic analysis and some of the more recent solution studies indicated binding elsewhere. We have now determined the crystal structures of the complexes of the trigonal form of beta-Lg at pH 7.5 with bound retinol (R=21.4% for 7329 reflections between 20 and 2.4 A resolution, R(free)=30.6%) and with bound retinoic acid (R=22.7% for 7813 reflections between 20 and 2.34 A resolution, R(free)=29.8%). Both ligands are found to occupy the central calyx in a manner similar to retinol binding in retinol-binding protein. We find no evidence of binding at the putative external binding site in either of these structural analyses. Further, competition between palmitic acid and retinol reveals only palmitate bound to the protein. An explanation is provided for the lack of ligand binding to the orthorhombic crystal form also obtained at pH 7.5. Finally, the possible function of beta-Lg is discussed in the light of its species distribution and similarity to other lipocalins.
-==Overview==
+The ligand-binding site of bovine beta-lactoglobulin: evidence for a function?,Kontopidis G, Holt C, Sawyer L J Mol Biol. 2002 May 10;318(4):1043-55. PMID:12054801<ref>PMID:12054801</ref>
-Ever since the fortuitous observation that beta-lactoglobulin (beta-Lg), the major whey protein in the milk of ruminants, bound retinol, the details of the binding have been controversial. beta-Lg is a lipocalin, like plasma retinol-binding protein, so that ligand association was expected to make use of the central cavity in the protein. However, an early crystallographic analysis and some of the more recent solution studies indicated binding elsewhere. We have now determined the crystal structures of the complexes of the trigonal form of beta-Lg at pH 7.5 with bound retinol (R=21.4% for 7329 reflections between 20 and 2.4 A resolution, R(free)=30.6%) and with bound retinoic acid (R=22.7% for 7813 reflections between 20 and 2.34 A resolution, R(free)=29.8%). Both ligands are found to occupy the central calyx in a manner similar to retinol binding in retinol-binding protein. We find no evidence of binding at the putative external binding site in either of these structural analyses. Further, competition between palmitic acid and retinol reveals only palmitate bound to the protein. An explanation is provided for the lack of ligand binding to the orthorhombic crystal form also obtained at pH 7.5. Finally, the possible function of beta-Lg is discussed in the light of its species distribution and similarity to other lipocalins.
-==About this Structure==
+From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
-GX8 is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Bos_taurus Bos taurus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1GX8 OCA].
+</div>
+<div class="pdbe-citations 1gx8" style="background-color:#fffaf0;"></div>
-==Reference==
+==See Also==
-The ligand-binding site of bovine beta-lactoglobulin: evidence for a function?, Kontopidis G, Holt C, Sawyer L, J Mol Biol. 2002 May 10;318(4):1043-55. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/12054801 12054801]
+*[[Beta-lactoglobulin 3D structures|Beta-lactoglobulin 3D structures]]
+== References ==
+<references/>
+__TOC__
+</StructureSection>
 [[Category: Bos taurus]]
-[[Category: Single protein]]
+[[Category: Large Structures]]
-[[Category: Kontopidis, G.]]
+[[Category: Kontopidis G]]
-[[Category: Sawyer, L.]]
+[[Category: Sawyer L]]
-[[Category: 3d-structure]]
-[[Category: Bovine]]
-[[Category: Lipocalin]]
-[[Category: Milk ,whey transport]]
-[[Category: Retinol-binding allergen]]
-[[Category: Signal]]
-''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May  2 18:07:59 2008''