6g3z

From Proteopedia

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Revision as of 06:18, 11 July 2018

Sulfolobus sulfataricus 2-keto-3-deoxygluconate (KDG) aldolase complex with D-KDPG

Structural highlights

6g3z is a 2 chain structure with sequence from 'saccharolobus solfataricus'. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:	,
Related:	4uxd
Activity:	2-dehydro-3-deoxy-phosphogluconate/2-dehydro-3-deoxy-6-phosphogalactonate aldolase, with EC number 4.1.2.55
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]

Publication Abstract from PubMed

The thermoacidophilic archaea Picrophilus torridus and Sulfolobus solfataricus catabolize glucose via a nonphosphorylative Entner-Doudoroff pathway and a branched Entner-Doudoroff pathway, respectively. Key enzymes for these Entner-Doudoroff pathways are the aldolases, 2-keto-3-deoxygluconate aldolase (KDG-aldolase) and 2-keto-3-deoxy-6-phosphogluconate aldolase [KD(P)G-aldolase]. KDG-aldolase from P. torridus (Pt-KDG-aldolase) is highly specific for the nonphosphorylated substrate, 2-keto-3-deoxygluconate (KDG), whereas KD(P)G-aldolase from S. solfataricus [Ss-KD(P)G-aldolase] is an enzyme that catalyzes the cleavage of both KDG and 2-keto-3-deoxy-6-phosphogluconate (KDPG), with a preference for KDPG. The structural basis for the high specificity of Pt-KDG-aldolase for KDG as compared to the more promiscuous Ss-KD(P)G-aldolase has not been analyzed before. In this work, we report the elucidation of the structure of Ss-KD(P)G-aldolase in complex with KDPG at 2.35 A and that of KDG-aldolase from P. torridus at 2.50 A resolution. By superimposition of the active sites of the two enzymes, and subsequent site-directed mutagenesis studies, a network of four amino acids, namely, Arg106, Tyr132, Arg237, and Ser241, was identified in Ss-KD(P)G-aldolase that interact with the negatively charged phosphate group of KDPG, thereby increasing the affinity of the enzyme for KDPG. This KDPG-binding network is absent in Pt-KDG-aldolase, which explains the low catalytic efficiency of KDPG cleavage.

Insights into the Substrate Specificity of Archaeal Entner-Doudoroff Aldolases: The Structures of Picrophilus torridus 2-Keto-3-deoxygluconate Aldolase and Sulfolobus solfataricus 2-Keto-3-deoxy-6-phosphogluconate Aldolase in Complex with 2-Keto-3-deoxy-6-phosphogluconate.,Zaitsev V, Johnsen U, Reher M, Ortjohann M, Taylor GL, Danson MJ, Schonheit P, Crennell SJ Biochemistry. 2018 Jun 13. doi: 10.1021/acs.biochem.8b00535. PMID:29812914^[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
↑ Zaitsev V, Johnsen U, Reher M, Ortjohann M, Taylor GL, Danson MJ, Schonheit P, Crennell SJ. Insights into the Substrate Specificity of Archaeal Entner-Doudoroff Aldolases: The Structures of Picrophilus torridus 2-Keto-3-deoxygluconate Aldolase and Sulfolobus solfataricus 2-Keto-3-deoxy-6-phosphogluconate Aldolase in Complex with 2-Keto-3-deoxy-6-phosphogluconate. Biochemistry. 2018 Jun 13. doi: 10.1021/acs.biochem.8b00535. PMID:29812914 doi:http://dx.doi.org/10.1021/acs.biochem.8b00535

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

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/6g3z"

@@ Line 3: / Line 3: @@
 <StructureSection load='6g3z' size='340' side='right' caption='[[6g3z]], [[Resolution|resolution]] 2.35&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[6g3z]] is a 2 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6G3Z OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=6G3Z FirstGlance]. <br>
+<table><tr><td colspan='2'>[[6g3z]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/'saccharolobus_solfataricus' 'saccharolobus solfataricus']. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6G3Z OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=6G3Z FirstGlance]. <br>
 </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=ELE:2-keto+3+deoxy+6+phospho+gluconate'>ELE</scene>, <scene name='pdbligand=IPA:ISOPROPYL+ALCOHOL'>IPA</scene></td></tr>
 <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[4uxd|4uxd]]</td></tr>
@@ Line 24: / Line 24: @@
 __TOC__
 </StructureSection>
+[[Category: Saccharolobus solfataricus]]
 [[Category: 2-dehydro-3-deoxy-phosphogluconate/2-dehydro-3-deoxy-6-phosphogalactonate aldolase]]
 [[Category: Crennell, S J]]

6g3z

From Proteopedia

Revision as of 06:18, 11 July 2018

Sulfolobus sulfataricus 2-keto-3-deoxygluconate (KDG) aldolase complex with D-KDPG

Structural highlights

Function

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

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