View source for 1g3l


==THE STRUCTURAL BASIS OF THE CATALYTIC MECHANISM AND REGULATION OF GLUCOSE-1-PHOSPHATE THYMIDYLYLTRANSFERASE (RMLA). TDP-L-RHAMNOSE COMPLEX.==
<StructureSection load='1g3l' size='340' side='right'caption='[[1g3l]], [[Resolution|resolution]] 2.70&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[1g3l]] is a 4 chain structure with sequence from [http://en.wikipedia.org/wiki/"bacillus_aeruginosus"_(schroeter_1872)_trevisan_1885 "bacillus aeruginosus" (schroeter 1872) trevisan 1885]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1G3L OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1G3L FirstGlance]. <br>
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene>, <scene name='pdbligand=TRH:2-DEOXY-THYMIDINE-BETA-L-RHAMNOSE'>TRH</scene></td></tr>
<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1g23|1g23]], [[1fxo|1fxo]], [[1fzw|1fzw]], [[1g2v|1g2v]], [[1g0r|1g0r]], [[1g1l|1g1l]]</td></tr>
<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Glucose-1-phosphate_thymidylyltransferase Glucose-1-phosphate thymidylyltransferase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.7.7.24 2.7.7.24] </span></td></tr>
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1g3l FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1g3l OCA], [http://pdbe.org/1g3l PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1g3l RCSB], [http://www.ebi.ac.uk/pdbsum/1g3l PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1g3l ProSAT]</span></td></tr>
</table>
== Function ==
[[http://www.uniprot.org/uniprot/Q9HU22_PSEAE Q9HU22_PSEAE]] Catalyzes the formation of dTDP-glucose, from dTTP and glucose 1-phosphate, as well as its pyrophosphorolysis (By similarity).[RuleBase:RU003706] 
== 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/g3/1g3l_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=1g3l ConSurf].
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== Publication Abstract from PubMed ==
The synthesis of deoxy-thymidine di-phosphate (dTDP)-L-rhamnose, an important component of the cell wall of many microorganisms, is a target for therapeutic intervention. The first enzyme in the dTDP-L-rhamnose biosynthetic pathway is glucose-1-phosphate thymidylyltransferase (RmlA). RmlA is inhibited by dTDP-L-rhamnose thereby regulating L-rhamnose production in bacteria. The structure of Pseudomonas aeruginosa RmlA has been solved to 1.66 A resolution. RmlA is a homotetramer, with the monomer consisting of three functional subdomains. The sugar binding and dimerization subdomains are unique to RmlA-like enzymes. The sequence of the core subdomain is found not only in sugar nucleotidyltransferases but also in other nucleotidyltransferases. The structures of five distinct enzyme substrate- product complexes reveal the enzyme mechanism that involves precise positioning of the nucleophile and activation of the electrophile. All the key residues are within the core subdomain, suggesting that the basic mechanism is found in many nucleotidyltransferases. The dTDP-L-rhamnose complex identifies how the protein is controlled by its natural inhibitor. This work provides a platform for the design of novel drugs against pathogenic bacteria.

The structural basis of the catalytic mechanism and regulation of glucose-1-phosphate thymidylyltransferase (RmlA).,Blankenfeldt W, Asuncion M, Lam JS, Naismith JH EMBO J. 2000 Dec 15;19(24):6652-63. PMID:11118200<ref>PMID:11118200</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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<div class="pdbe-citations 1g3l" style="background-color:#fffaf0;"></div>

==See Also==
*[[Glucose-1-phosphate thymidylyltransferase 3D structures|Glucose-1-phosphate thymidylyltransferase 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Glucose-1-phosphate thymidylyltransferase]]
[[Category: Large Structures]]
[[Category: Asuncion, M]]
[[Category: Blankenfeldt, W]]
[[Category: Lam, J S]]
[[Category: Naismith, J H]]
[[Category: Allostery]]
[[Category: L-rhamnose]]
[[Category: Nucleotidyltransferase]]
[[Category: Pyrophosphorylase]]
[[Category: Thymidylyltransferase]]
[[Category: Transferase]]