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[[Image:1jvi.gif|left|200px]]


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==THE 2.2 ANGSTROM RESOLUTION STRUCTURE OF BACILLUS SUBTILIS LUXS/RIBOSILHOMOCYSTEINE COMPLEX==
The line below this paragraph, containing "STRUCTURE_1jvi", creates the "Structure Box" on the page.
<StructureSection load='1jvi' size='340' side='right'caption='[[1jvi]], [[Resolution|resolution]] 2.20&Aring;' scene=''>
You may change the PDB parameter (which sets the PDB file loaded into the applet)
== Structural highlights ==
or the SCENE parameter (which sets the initial scene displayed when the page is loaded),
<table><tr><td colspan='2'>[[1jvi]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Bacillus_subtilis Bacillus subtilis]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1JVI OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1JVI FirstGlance]. <br>
or leave the SCENE parameter empty for the default display.
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.2&#8491;</td></tr>
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<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=HCS:2-AMINO-4-MERCAPTO-BUTYRIC+ACID'>HCS</scene>, <scene name='pdbligand=OCS:CYSTEINESULFONIC+ACID'>OCS</scene>, <scene name='pdbligand=RHC:5-(3-AMINO-4,4-DIHYROXY-BUTYLSULFANYLMETHYL)-TETRAHYDRO-FURAN-2,3,4-TRIOL'>RHC</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></td></tr>
{{STRUCTURE_1jvi|  PDB=1jvi  |  SCENE= }}
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1jvi FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1jvi OCA], [https://pdbe.org/1jvi PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1jvi RCSB], [https://www.ebi.ac.uk/pdbsum/1jvi PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1jvi ProSAT]</span></td></tr>
 
</table>
'''THE 2.2 ANGSTROM RESOLUTION STRUCTURE OF BACILLUS SUBTILIS LUXS/RIBOSILHOMOCYSTEINE COMPLEX'''
== Function ==
 
[https://www.uniprot.org/uniprot/LUXS_BACSU LUXS_BACSU] Involved in the synthesis of autoinducer 2 (AI-2) which is secreted by bacteria and is used to communicate both the cell density and the metabolic potential of the environment. The regulation of gene expression in response to changes in cell density is called quorum sensing. Catalyzes the transformation of S-ribosylhomocysteine (RHC) to homocysteine (HC) and 4,5-dihydroxy-2,3-pentadione (DPD).[HAMAP-Rule:MF_00091]
 
== Evolutionary Conservation ==
==Overview==
[[Image:Consurf_key_small.gif|200px|right]]
In bacteria, the regulation of gene expression in response to changes in cell density is called quorum sensing. The autoinducer-2 production protein LuxS, is involved in a novel quorum-sensing system and is thought to catalyse the degradation of S-ribosylhomocysteine to homocysteine and the autoinducer molecule 4,5-dihydroxy-2,3-pentadione. The crystal structure of Bacillus subtilis LuxS has been determined at 1.2 A resolution, together with the binary complexes of LuxS with S-ribosylhomocysteine and homocysteine to 2.2 and 2.3 A resolution, respectively. These structures show that LuxS is a homodimer with an apparently novel fold based on an eight-stranded beta-barrel, flanked by six alpha-helices. Each active site contains a zinc ion coordinated by the conserved residues His54, His58 and Cys126, and includes residues from both subunits. S-ribosylhomocysteine binds in a deep pocket with the ribose moiety adjacent to the enzyme-bound zinc ion. Access to the active site appears to be restricted and possibly requires conformational changes in the protein involving the movement of residues 125-129 and those at the N terminus. The structure contains an oxidised cysteine residue in the active site whose role in the biological process of LuxS has not been determined. The autoinducer-2 signalling pathway has been linked to aspects of bacterial virulence and pathogenicity. The structural data on LuxS will provide opportunities for targeting this enzyme for the rational design of new antibiotics.
Check<jmol>
 
  <jmolCheckbox>
==About this Structure==
    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/jv/1jvi_consurf.spt"</scriptWhenChecked>
1JVI is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Bacillus_subtilis Bacillus subtilis]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1JVI OCA].  
    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
 
    <text>to colour the structure by Evolutionary Conservation</text>
==Reference==
  </jmolCheckbox>
The 1.2 A structure of a novel quorum-sensing protein, Bacillus subtilis LuxS., Ruzheinikov SN, Das SK, Sedelnikova SE, Hartley A, Foster SJ, Horsburgh MJ, Cox AG, McCleod CW, Mekhalfia A, Blackburn GM, Rice DW, Baker PJ, J Mol Biol. 2001 Oct 12;313(1):111-22. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/11601850 11601850]
</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=1jvi ConSurf].
<div style="clear:both"></div>
__TOC__
</StructureSection>
[[Category: Bacillus subtilis]]
[[Category: Bacillus subtilis]]
[[Category: Single protein]]
[[Category: Large Structures]]
[[Category: Baker, P J.]]
[[Category: Baker PJ]]
[[Category: Blackburn, G M.]]
[[Category: Blackburn GM]]
[[Category: Cox, A G.]]
[[Category: Cox AG]]
[[Category: Das, S K.]]
[[Category: Das SK]]
[[Category: Foster, S J.]]
[[Category: Foster SJ]]
[[Category: Hartley, A.]]
[[Category: Hartley A]]
[[Category: Horsburgh, M J.]]
[[Category: Horsburgh MJ]]
[[Category: McCleod, C W.]]
[[Category: McCleod CW]]
[[Category: Mekhalfia, A.]]
[[Category: Mekhalfia A]]
[[Category: Rice, D W.]]
[[Category: Rice DW]]
[[Category: Ruzheinikov, S N.]]
[[Category: Ruzheinikov SN]]
[[Category: Sedelnikova, S E.]]
[[Category: Sedelnikova SE]]
[[Category: Autoinducer synthesis]]
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May  2 21:58:29 2008''

Latest revision as of 09:04, 3 April 2024

THE 2.2 ANGSTROM RESOLUTION STRUCTURE OF BACILLUS SUBTILIS LUXS/RIBOSILHOMOCYSTEINE COMPLEXTHE 2.2 ANGSTROM RESOLUTION STRUCTURE OF BACILLUS SUBTILIS LUXS/RIBOSILHOMOCYSTEINE COMPLEX

Structural highlights

1jvi is a 1 chain structure with sequence from Bacillus subtilis. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:X-ray diffraction, Resolution 2.2Å
Ligands:, , , ,
Resources:FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

LUXS_BACSU Involved in the synthesis of autoinducer 2 (AI-2) which is secreted by bacteria and is used to communicate both the cell density and the metabolic potential of the environment. The regulation of gene expression in response to changes in cell density is called quorum sensing. Catalyzes the transformation of S-ribosylhomocysteine (RHC) to homocysteine (HC) and 4,5-dihydroxy-2,3-pentadione (DPD).[HAMAP-Rule:MF_00091]

Evolutionary Conservation

Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.

1jvi, resolution 2.20Å

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