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1w3t

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Revision as of 06:51, 28 March 2018

Sulfolobus solfataricus 2-keto-3-deoxygluconate (KDG) aldolase complex with D-KDGal, D-Glyceraldehyde and pyruvate

Structural highlights

1w3t is a 4 chain structure with sequence from Atcc 35091. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:	, , ,
Related:	1w37, 1w3i, 1w3n
Activity:	2-dehydro-3-deoxyglucarate aldolase, with EC number 4.1.2.20
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[KDGA_SULSF] Involved in the degradation of glucose and galactose via the Entner-Doudoroff pathway. Catalyzes the reversible cleavage of 2-keto-3-deoxy-6-phosphogluconate (KDPG) and 2-keto-3-deoxygluconate (KDG) forming pyruvate and glyceraldehyde 3-phosphate or glyceraldehyde, respectively. It is also able to catalyze the reversible cleavage of 2-keto-3-deoxy-6-phosphogalactonate (KDPGal) and 2-keto-3-deoxygalactonate (KDGal). It is equally active with both D- and L-glyceraldehyde.^[1] ^[2] ^[3]

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

The hyperthermophilic Archaea Sulfolobus solfataricus grows optimally above 80 degrees C and metabolizes glucose by a non-phosphorylative variant of the Entner-Doudoroff pathway. In this pathway glucose dehydrogenase and gluconate dehydratase catalyze the oxidation of glucose to gluconate and the subsequent dehydration of gluconate to D-2-keto-3-deoxygluconate (KDG). KDG aldolase (KDGA) then catalyzes the cleavage of KDG to D-glyceraldehyde and pyruvate. It has recently been shown that all the enzymes of this pathway exhibit a catalytic promiscuity that also enables them to be used for the metabolism of galactose. This phenomenon, known as metabolic pathway promiscuity, depends crucially on the ability of KDGA to cleave KDG and D-2-keto-3-deoxygalactonate (KDGal), in both cases producing pyruvate and D-glyceraldehyde. In turn, the aldolase exhibits a remarkable lack of stereoselectivity in the condensation reaction of pyruvate and D-glyceraldehyde, forming a mixture of KDG and KDGal. We now report the structure of KDGA, determined by multiwavelength anomalous diffraction phasing, and confirm that it is a member of the tetrameric N-acetylneuraminate lyase superfamily of Schiff base-forming aldolases. Furthermore, by soaking crystals of the aldolase at more than 80 degrees C below its temperature activity optimum, we have been able to trap Schiff base complexes of the natural substrates pyruvate, KDG, KDGal, and pyruvate plus D-glyceraldehyde, which have allowed rationalization of the structural basis of promiscuous substrate recognition and catalysis. It is proposed that the active site of the enzyme is rigid to keep its thermostability but incorporates extra functionality to be promiscuous.

The structural basis for substrate promiscuity in 2-keto-3-deoxygluconate aldolase from the Entner-Doudoroff pathway in Sulfolobus solfataricus.,Theodossis A, Walden H, Westwick EJ, Connaris H, Lamble HJ, Hough DW, Danson MJ, Taylor GL J Biol Chem. 2004 Oct 15;279(42):43886-92. Epub 2004 Jul 20. PMID:15265860^[4]

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

References

↑ Buchanan CL, Connaris H, Danson MJ, Reeve CD, Hough DW. An extremely thermostable aldolase from Sulfolobus solfataricus with specificity for non-phosphorylated substrates. Biochem J. 1999 Nov 1;343 Pt 3:563-70. PMID:10527934
↑ Lamble HJ, Heyer NI, Bull SD, Hough DW, Danson MJ. Metabolic pathway promiscuity in the archaeon Sulfolobus solfataricus revealed by studies on glucose dehydrogenase and 2-keto-3-deoxygluconate aldolase. J Biol Chem. 2003 Sep 5;278(36):34066-72. Epub 2003 Jun 24. PMID:12824170 doi:http://dx.doi.org/10.1074/jbc.M305818200
↑ Lamble HJ, Theodossis A, Milburn CC, Taylor GL, Bull SD, Hough DW, Danson MJ. Promiscuity in the part-phosphorylative Entner-Doudoroff pathway of the archaeon Sulfolobus solfataricus. FEBS Lett. 2005 Dec 19;579(30):6865-9. Epub 2005 Dec 1. PMID:16330030 doi:http://dx.doi.org/10.1016/j.febslet.2005.11.028
↑ Theodossis A, Walden H, Westwick EJ, Connaris H, Lamble HJ, Hough DW, Danson MJ, Taylor GL. The structural basis for substrate promiscuity in 2-keto-3-deoxygluconate aldolase from the Entner-Doudoroff pathway in Sulfolobus solfataricus. J Biol Chem. 2004 Oct 15;279(42):43886-92. Epub 2004 Jul 20. PMID:15265860 doi:10.1074/jbc.M407702200

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

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/1w3t"

@@ Line 1: / Line 1: @@
-==SULFOLOBUS SOLFATARICUS 2-KETO-3-DEOXYGLUCONATE (KDG) ALDOLASE COMPLEX WITH D-KDGAL, D-GLYCERALDEHYDE AND PYRUVATE==
+==Sulfolobus solfataricus 2-keto-3-deoxygluconate (KDG) aldolase complex with D-KDGal, D-Glyceraldehyde and pyruvate==
 <StructureSection load='1w3t' size='340' side='right' caption='[[1w3t]], [[Resolution|resolution]] 2.10&Aring;' scene=''>
 == Structural highlights ==
@@ Line 6: / Line 7: @@
 <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1w37|1w37]], [[1w3i|1w3i]], [[1w3n|1w3n]]</td></tr>
 <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/2-dehydro-3-deoxyglucarate_aldolase 2-dehydro-3-deoxyglucarate aldolase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=4.1.2.20 4.1.2.20] </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=1w3t FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1w3t OCA], [http://pdbe.org/1w3t PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1w3t RCSB], [http://www.ebi.ac.uk/pdbsum/1w3t PDBsum]</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=1w3t FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1w3t OCA], [http://pdbe.org/1w3t PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1w3t RCSB], [http://www.ebi.ac.uk/pdbsum/1w3t PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1w3t ProSAT]</span></td></tr>
 </table>
 == Function ==
@@ Line 14: / Line 15: @@
 Check<jmol>
   <jmolCheckbox>
-    <scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/w3/1w3t_consurf.spt"</scriptWhenChecked>
+    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/w3/1w3t_consurf.spt"</scriptWhenChecked>
     <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
     <text>to colour the structure by Evolutionary Conservation</text>

1w3t

From Proteopedia

Revision as of 06:51, 28 March 2018

Sulfolobus solfataricus 2-keto-3-deoxygluconate (KDG) aldolase complex with D-KDGal, D-Glyceraldehyde and pyruvate

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

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