View source for 1uc9


==Crystal structure of a lysine biosynthesis enzyme, Lysx, from thermus thermophilus HB8==
<StructureSection load='1uc9' size='340' side='right'caption='[[1uc9]], [[Resolution|resolution]] 2.38&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[1uc9]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Thermus_thermophilus Thermus thermophilus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1UC9 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1UC9 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]] 2.38&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ADP:ADENOSINE-5-DIPHOSPHATE'>ADP</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=1uc9 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1uc9 OCA], [https://pdbe.org/1uc9 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1uc9 RCSB], [https://www.ebi.ac.uk/pdbsum/1uc9 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1uc9 ProSAT], [https://www.topsan.org/Proteins/RSGI/1uc9 TOPSAN]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/LYSX_THET8 LYSX_THET8] Catalyzes the ATP-dependent formation of a covalent bond between the amino group of alpha-aminoadipate (AAA) and the gamma-carboxyl group of the C-terminal glutamate residue in LysW.<ref>PMID:19620981</ref> 
== 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/uc/1uc9_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=1uc9 ConSurf].
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== Publication Abstract from PubMed ==
The thermophilic bacterium Thermus thermophilus synthesizes lysine through the alpha-aminoadipate pathway, which uses alpha-aminoadipate as a biosynthetic intermediate of lysine. LysX is the essential enzyme in this pathway, and is believed to catalyze the acylation of alpha-aminoadipate. We have determined the crystal structures of LysX and its complex with ADP at 2.0A and 2.38A resolutions, respectively. LysX is composed of three alpha+beta domains, each composed of a four to five-stranded beta-sheet core flanked by alpha-helices. The C-terminal and central domains form an ATP-grasp fold, which is responsible for ATP binding. LysX has two flexible loop regions, which are expected to play an important role in substrate binding and protection. In spite of the low level of sequence identity, the overall fold of LysX is surprisingly similar to that of other ATP-grasp fold proteins, such as D-Ala:D-Ala ligase, PurT-encoded glycinamide ribonucleotide transformylase, glutathione synthetase, and synapsin I. In particular, they share a similar spatial arrangement of the amino acid residues around the ATP-binding site. This observation strongly suggests that LysX is an ATP-utilizing enzyme that shares a common evolutionary ancestor with other ATP-grasp fold proteins possessing a carboxylate-amine/thiol ligase activity.

Crystal structure of a lysine biosynthesis enzyme, LysX, from Thermus thermophilus HB8.,Sakai H, Vassylyeva MN, Matsuura T, Sekine S, Gotoh K, Nishiyama M, Terada T, Shirouzu M, Kuramitsu S, Vassylyev DG, Yokoyama S J Mol Biol. 2003 Sep 19;332(3):729-40. PMID:12963379<ref>PMID:12963379</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Thermus thermophilus]]
[[Category: Kuramitsu S]]
[[Category: Matsuura T]]
[[Category: Nishiyama M]]
[[Category: Sakai H]]
[[Category: Sekine S]]
[[Category: Shirouzu M]]
[[Category: Terada T]]
[[Category: Vassylyev DG]]
[[Category: Vassylyeva MN]]
[[Category: Yokoyama S]]