1k9v: Difference between revisions

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-[[Image:1k9v.jpg|left|200px]]<br /><applet load="1k9v" size="350" color="white" frame="true" align="right" spinBox="true"
-caption="1k9v, resolution 2.4&Aring;" />
-'''Structural evidence for ammonia tunelling across the (beta-alpha)8-barrel of the imidazole glycerol phosphate synthase bienzyme complex'''<br />
-==Overview==
+==Structural evidence for ammonia tunelling across the (beta-alpha)8-barrel of the imidazole glycerol phosphate synthase bienzyme complex==
-Since reactive ammonia is not available under physiological conditions, glutamine is used as a source for the incorporation of nitrogen in a number of metabolic pathway intermediates. The heterodimeric ImGP synthase that links histidine and purine biosynthesis belongs to the family of glutamine amidotransferases in which the glutaminase activity is coupled with a subsequent synthase activity specific for each member of the enzyme family. Its X-ray structure from the hyperthermophile Thermotoga maritima shows that the glutaminase subunit is associated with the N-terminal face of the (beta alpha)(8) barrel cyclase subunit. The complex reveals a putative tunnel for the transfer of ammonia over a distance of 25 A. Although ammonia tunneling has been reported for glutamine amidotransferases, the ImGP synthase has evolved a novel mechanism, which extends the known functional properties of the versatile (beta alpha)(8) barrel fold.
+<StructureSection load='1k9v' size='340' side='right'caption='[[1k9v]], [[Resolution|resolution]] 2.40&Aring;' scene=''>
+== Structural highlights ==
-==About this Structure==
+<table><tr><td colspan='2'>[[1k9v]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Thermotoga_maritima Thermotoga maritima]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1K9V OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1K9V FirstGlance]. <br>
-K9V is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Thermotoga_maritima Thermotoga maritima] with <scene name='pdbligand=ACY:'>ACY</scene> as [http://en.wikipedia.org/wiki/ligand ligand]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1K9V OCA].
+</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=ACY:ACETIC+ACID'>ACY</scene></td></tr>
-==Reference==
+<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1k9v FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1k9v OCA], [https://pdbe.org/1k9v PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1k9v RCSB], [https://www.ebi.ac.uk/pdbsum/1k9v PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1k9v ProSAT]</span></td></tr>
-Structural evidence for ammonia tunneling across the (beta alpha)(8) barrel of the imidazole glycerol phosphate synthase bienzyme complex., Douangamath A, Walker M, Beismann-Driemeyer S, Vega-Fernandez MC, Sterner R, Wilmanns M, Structure. 2002 Feb;10(2):185-93. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=11839304 11839304]
+</table>
-[[Category: Single protein]]
+== Function ==
+[https://www.uniprot.org/uniprot/HIS5_THEMA HIS5_THEMA] IGPS catalyzes the conversion of PRFAR and glutamine to IGP, AICAR and glutamate. The HisH subunit provides the glutamine amidotransferase activity that produces the ammonia necessary to HisF for the synthesis of IGP and AICAR.[HAMAP-Rule:MF_00278]
+== 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/k9/1k9v_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=1k9v ConSurf].
+<div style="clear:both"></div>
+__TOC__
+</StructureSection>
+[[Category: Large Structures]]
 [[Category: Thermotoga maritima]]
-[[Category: Beismann-Driemeyer, S.]]
+[[Category: Beismann-Driemeyer S]]
-[[Category: Douangamath, A.]]
+[[Category: Douangamath A]]
-[[Category: Sterner, R.]]
+[[Category: Sterner R]]
-[[Category: Vega-Fernandez, M C.]]
+[[Category: Vega-Fernandez MC]]
-[[Category: Walker, M.]]
+[[Category: Walker M]]
-[[Category: Wilmanns, M.]]
+[[Category: Wilmanns M]]
-[[Category: ACY]]
-[[Category: (beta-alpha)8-barrel]]
-[[Category: ammonia tunnel]]
-[[Category: glutaminase]]
-[[Category: imidazole glycerol phosphate synthase]]
-[[Category: x-ray structure]]
-''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 13:31:42 2008''