1byu: Difference between revisions

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OCA

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-[[Image:1byu.gif|left|200px]]<br /><applet load="1byu" size="450" color="white" frame="true" align="right" spinBox="true"
-caption="1byu, resolution 2.15&Aring;" />
-'''CANINE GDP-RAN'''<br />
-==Overview==
+==CANINE GDP-RAN==
-We report the 2.3 A resolution X-ray crystal structure of the GDP-bound, form of the RanQ69L mutant that is used extensively in studies of, nucleocytoplasmic transport and cell-cycle progression. When the structure, of GDP-RanQ69L from monoclinic crystals with P21 symmetry was compared, with the structure of wild-type Ran obtained from monoclinic crystals, the, Q69L mutant showed a large conformational change in residues 68-74, which, are in the switch II region of the molecule which changes conformation in, response to nucleotide state and which forms the major interaction, interface with nuclear transport factor 2 (NTF2, sometimes called p10)., This conformational change alters the positions of key residues such as, Lys71, Phe72 and Arg76 that are crucial for the interaction of GDP-Ran, with NTF2 and indeed, solution binding studies were unable to detect any, interaction between NTF2 and GDP-RanQ69L under conditions where GDP-Ran, bound effectively. This interaction between NTF2 and GDP-Ran is required, for efficient nuclear protein import and may function between the docking, and translocation steps of the pathway.
+<StructureSection load='1byu' size='340' side='right'caption='[[1byu]], [[Resolution|resolution]] 2.15&Aring;' scene=''>
+== Structural highlights ==
+<table><tr><td colspan='2'>[[1byu]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Canis_lupus_familiaris Canis lupus familiaris]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1BYU OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1BYU 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]] 2.15&#8491;</td></tr>
+<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=GDP:GUANOSINE-5-DIPHOSPHATE'>GDP</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</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=1byu FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1byu OCA], [https://pdbe.org/1byu PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1byu RCSB], [https://www.ebi.ac.uk/pdbsum/1byu PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1byu ProSAT]</span></td></tr>
+</table>
+== Function ==
+[https://www.uniprot.org/uniprot/RAN_CANLF RAN_CANLF] GTPase involved in nucleocytoplasmic transport, participating both to the import and the export from the nucleus of proteins and RNAs. Switches between a cytoplasmic GDP- and a nuclear GTP-bound state by nucleotide exchange and GTP hydrolysis. Nuclear import receptors such as importin beta bind their substrates only in the absence of GTP-bound RAN and release them upon direct interaction with GTP-bound RAN, while export receptors behave in the opposite way. Thereby, RAN controls cargo loading and release by transport receptors in the proper compartment and ensures the directionality of the transport. Interaction with RANBP1 induces a conformation change in the complex formed by XPO1 and RAN that triggers the release of the nuclear export signal of cargo proteins. RAN (GTP-bound form) triggers microtubule assembly at mitotic chromosomes and is required for normal mitotic spindle assembly and chromosome segregation. Required for normal progress through mitosis. The complex with BIRC5/survivin plays a role in mitotic spindle formation by serving as a physical scaffold to help deliver the RAN effector molecule TPX2 to microtubules. Acts as a negative regulator of the kinase activity of VRK1 and VRK2. Enhances AR-mediated transactivation.[UniProtKB:P62826]
+== 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/by/1byu_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=1byu ConSurf].
+<div style="clear:both"></div>
-==About this Structure==
+==See Also==
-BYU is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Canis_lupus_familiaris Canis lupus familiaris] with MG and GDP as [http://en.wikipedia.org/wiki/ligands ligands]. Full crystallographic information is available from [http://ispc.weizmann.ac.il/oca-bin/ocashort?id=1BYU OCA].
+*[[GTP-binding protein 3D structures|GTP-binding protein 3D structures]]
+__TOC__
-==Reference==
+</StructureSection>
-The structure of the Q69L mutant of GDP-Ran shows a major conformational change in the switch II loop that accounts for its failure to bind nuclear transport factor 2 (NTF2)., Stewart M, Kent HM, McCoy AJ, J Mol Biol. 1998 Dec 18;284(5):1517-27. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=9878368 9878368]
 [[Category: Canis lupus familiaris]]
-[[Category: Single protein]]
+[[Category: Large Structures]]
-[[Category: Kent, H.M.]]
+[[Category: Kent HM]]
-[[Category: Mccoy, A.J.]]
+[[Category: Mccoy AJ]]
-[[Category: Stewart, M.]]
+[[Category: Stewart M]]
-[[Category: GDP]]
-[[Category: MG]]
-[[Category: gtpase]]
-[[Category: nuclear transport]]
-''Page seeded by [http://ispc.weizmann.ac.il/oca OCA ] on Tue Nov 20 12:02:03 2007''