2x7j

From Proteopedia

(Difference between revisions)
Jump to: navigation, search
m (Protected "2x7j" [edit=sysop:move=sysop])
Line 1: Line 1:
-
[[Image:2x7j.png|left|200px]]
+
==STRUCTURE OF THE MENAQUINONE BIOSYNTHESIS PROTEIN MEND FROM BACILLUS SUBTILIS==
 +
<StructureSection load='2x7j' size='340' side='right' caption='[[2x7j]], [[Resolution|resolution]] 2.35&Aring;' scene=''>
 +
== Structural highlights ==
 +
<table><tr><td colspan='2'>[[2x7j]] is a 4 chain structure with 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=2X7J OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2X7J FirstGlance]. <br>
 +
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=EDO:1,2-ETHANEDIOL'>EDO</scene>, <scene name='pdbligand=MN:MANGANESE+(II)+ION'>MN</scene>, <scene name='pdbligand=NA:SODIUM+ION'>NA</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene>, <scene name='pdbligand=TPP:THIAMINE+DIPHOSPHATE'>TPP</scene></td></tr>
 +
<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/2-succinyl-5-enolpyruvyl-6-hydroxy-3-cyclohexene-1-carboxylic-acid_synthase 2-succinyl-5-enolpyruvyl-6-hydroxy-3-cyclohexene-1-carboxylic-acid synthase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.2.1.9 2.2.1.9] </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=2x7j FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2x7j OCA], [http://www.rcsb.org/pdb/explore.do?structureId=2x7j RCSB], [http://www.ebi.ac.uk/pdbsum/2x7j PDBsum]</span></td></tr>
 +
</table>
 +
== 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/x7/2x7j_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/chain_selection.php?pdb_ID=2ata ConSurf].
 +
<div style="clear:both"></div>
 +
<div style="background-color:#fffaf0;">
 +
== Publication Abstract from PubMed ==
 +
The first committed step in the classical biosynthetic route to menaquinone (vitamin K(2)) is a Stetter-like conjugate addition of alpha-ketoglutarate with isochorismate. This reaction is catalyzed by the thiamine diphosphate and metal-ion-dependent 2-succinyl-5-enolpyruvyl-6-hydroxy-3-cyclohexadiene-1-carboxylate synthase (MenD). The medium-resolution (2.35 A) crystal structure of Bacillus subtilis MenD with cofactor and Mn(2+) has been determined. Based on structure-sequence comparisons and modeling, a two-stage mechanism that is primarily driven by the chemical properties of the cofactor is proposed. Hypotheses for the molecular determinants of substrate recognition were formulated. Five basic residues (Arg32, Arg106, Arg409, Arg428, and Lys299) are postulated to interact with carboxylate and hydroxyl groups to align substrates for catalysis in combination with a cluster of non-polar residues (Ile489, Phe490, and Leu493) on one side of the active site. The powerful combination of site-directed mutagenesis, where each of the eight residues is replaced by alanine, and steady-state kinetic measurements has been exploited to address these hypotheses. Arg409 plays a significant role in binding both substrates while Arg428 contributes mainly to binding of alpha-ketoglutarate. Arg32 and in particular Arg106 are critical for recognition of isochorismate. Mutagenesis of Phe490 and Ile489 has the most profound influence on catalytic efficiency, indicating that these two residues are important for binding of isochorismate and for stabilizing the cofactor position. These data allow for a detailed description of the structure-reactivity relationship that governs MenD function and refinement of the model for the catalytic intermediate that supports the Stetter-like conjugate addition.
-
{{STRUCTURE_2x7j| PDB=2x7j | SCENE= }}
+
Structure and reactivity of Bacillus subtilis MenD catalyzing the first committed step in menaquinone biosynthesis.,Dawson A, Chen M, Fyfe PK, Guo Z, Hunter WN J Mol Biol. 2010 Aug 13;401(2):253-64. Epub 2010 Jun 18. PMID:20600129<ref>PMID:20600129</ref>
-
===STRUCTURE OF THE MENAQUINONE BIOSYNTHESIS PROTEIN MEND FROM BACILLUS SUBTILIS===
+
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
-
 
+
</div>
-
{{ABSTRACT_PUBMED_20600129}}
+
== References ==
-
 
+
<references/>
-
==About this Structure==
+
__TOC__
-
[[2x7j]] is a 4 chain structure with 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=2X7J OCA].
+
</StructureSection>
-
 
+
-
==Reference==
+
-
<ref group="xtra">PMID:020600129</ref><references group="xtra"/>
+
[[Category: 2-succinyl-5-enolpyruvyl-6-hydroxy-3-cyclohexene-1-carboxylic-acid synthase]]
[[Category: 2-succinyl-5-enolpyruvyl-6-hydroxy-3-cyclohexene-1-carboxylic-acid synthase]]
[[Category: Bacillus subtilis]]
[[Category: Bacillus subtilis]]

Revision as of 13:14, 22 October 2014

STRUCTURE OF THE MENAQUINONE BIOSYNTHESIS PROTEIN MEND FROM BACILLUS SUBTILIS

2x7j, resolution 2.35Å

Drag the structure with the mouse to rotate

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/2x7j"
Personal tools