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3gfq

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Revision as of 05:10, 7 December 2018

Structure of YhdA, K109L variant

Structural highlights

3gfq is a 4 chain structure with sequence from "vibrio_subtilis"_ehrenberg_1835 "vibrio subtilis" ehrenberg 1835. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:
Related:	1nni, 3gfr, 3gfs
Gene:	azr, BSU09340, yhdA ("Vibrio subtilis" Ehrenberg 1835)
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[AZR_BACSU] Catalyzes the reductive cleavage of azo bond in aromatic azo compounds to the corresponding amines. Requires NADPH, but not NADH, as an electron donor for its activity.^[1] ^[2]

Evolutionary Conservation

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

Publication Abstract from PubMed

YhdA, a thermostable NADPH:FMN oxidoreductase from Bacillus subtilis, reduces quinones via a ping-pong bi-bi mechanism with a pronounced preference for NADPH. The enzyme occurs as a stable tetramer in solution. The two extended dimer surfaces are packed against each other by a 90 rotation of one dimer with respect to the other. This assembly is stabilized by the formation of four salt bridges between K109 and D137 of the neighbouring protomers. To investigate the importance of the ion pair contacts, the K109L and D137L single replacement variants, as well as the K109L/D137L and K109D/D137K double replacement variants, were generated, expressed, purified, crystallized and biochemically characterized. The K109L and D137L variants form dimers instead of tetramers, whereas the K109L/D137L and K109D/D137K variants appear to exist in a dimer-tetramer equilibrium in solution. The crystal structures of the K109L and D137L variants confirm the dimeric state, with the K109L/D137L and K109D/D137K variants adopting a tetrameric assembly. Interestingly, all protein variants show a drastically reduced quinone reductase activity in steady-state kinetics. Detailed analysis of the two half reactions revealed that the oxidative half reaction is not affected, whereas reduction of the bound FMN cofactor by NADPH is virtually abolished. Inspection of the crystal structures indicates that the side chain of K109 plays a dual role by forming a salt bridge to D137, as well as stabilizing a glycine-rich loop in the vicinity of the FMN cofactor. In all protein variants, this glycine-rich loop exhibits a much higher mobility, compared to the wild-type. This appears to be incompatible with NADPH binding and thus leads to abrogation of flavin reduction.

A single intersubunit salt bridge affects oligomerization and catalytic activity in a bacterial quinone reductase.,Binter A, Staunig N, Jelesarov I, Lohner K, Palfey BA, Deller S, Gruber K, Macheroux P FEBS J. 2009 Sep;276(18):5263-74. Epub 2009 Aug 13. PMID:19682074^[3]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Deller S, Sollner S, Trenker-El-Toukhy R, Jelesarov I, Gubitz GM, Macheroux P. Characterization of a thermostable NADPH:FMN oxidoreductase from the mesophilic bacterium Bacillus subtilis. Biochemistry. 2006 Jun 13;45(23):7083-91. PMID:16752898 doi:http://dx.doi.org/10.1021/bi052478r
↑ Sugiura W, Yoda T, Matsuba T, Tanaka Y, Suzuki Y. Expression and characterization of the genes encoding azoreductases from Bacillus subtilis and Geobacillus stearothermophilus. Biosci Biotechnol Biochem. 2006 Jul;70(7):1655-65. PMID:16861800
↑ Binter A, Staunig N, Jelesarov I, Lohner K, Palfey BA, Deller S, Gruber K, Macheroux P. A single intersubunit salt bridge affects oligomerization and catalytic activity in a bacterial quinone reductase. FEBS J. 2009 Sep;276(18):5263-74. Epub 2009 Aug 13. PMID:19682074 doi:10.1111/j.1742-4658.2009.07222.x

1 Structural highlights
2 Function
3 Evolutionary Conservation
4 Publication Abstract from PubMed
5 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/3gfq"

@@ Line 3: / Line 3: @@
 <StructureSection load='3gfq' size='340' side='right' caption='[[3gfq]], [[Resolution|resolution]] 3.00&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[3gfq]] is a 4 chain structure with sequence from [http://en.wikipedia.org/wiki/"bacillus_globigii"_migula_1900 "bacillus globigii" migula 1900]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3GFQ OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3GFQ FirstGlance]. <br>
+<table><tr><td colspan='2'>[[3gfq]] is a 4 chain structure with sequence from [http://en.wikipedia.org/wiki/"vibrio_subtilis"_ehrenberg_1835 "vibrio subtilis" ehrenberg 1835]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3GFQ OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3GFQ FirstGlance]. <br>
 </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=FMN:FLAVIN+MONONUCLEOTIDE'>FMN</scene></td></tr>
 <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1nni|1nni]], [[3gfr|3gfr]], [[3gfs|3gfs]]</td></tr>
-<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">azr, BSU09340, yhdA ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=1423 "Bacillus globigii" Migula 1900])</td></tr>
+<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">azr, BSU09340, yhdA ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=1423 "Vibrio subtilis" Ehrenberg 1835])</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=3gfq FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3gfq OCA], [http://pdbe.org/3gfq PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=3gfq RCSB], [http://www.ebi.ac.uk/pdbsum/3gfq PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=3gfq ProSAT]</span></td></tr>
 </table>
@@ Line 15: / Line 15: @@
 Check<jmol>
   <jmolCheckbox>
-    <scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/gf/3gfq_consurf.spt"</scriptWhenChecked>
+    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/gf/3gfq_consurf.spt"</scriptWhenChecked>
     <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
     <text>to colour the structure by Evolutionary Conservation</text>
@@ Line 34: / Line 34: @@
 __TOC__
 </StructureSection>
-[[Category: Bacillus globigii migula 1900]]
+[[Category: Vibrio subtilis ehrenberg 1835]]
 [[Category: Gruber, K]]
 [[Category: Staunig, N]]

3gfq

From Proteopedia

Revision as of 05:10, 7 December 2018

Structure of YhdA, K109L variant

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

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