View source for 9rb2


==Crystal Structure of glxR==
<StructureSection load='9rb2' size='340' side='right'caption='[[9rb2]], [[Resolution|resolution]] 2.21&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[9rb2]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Pseudomonas_aeruginosa Pseudomonas aeruginosa]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=9RB2 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=9RB2 FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.21&#8491;</td></tr>
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=9rb2 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=9rb2 OCA], [https://pdbe.org/9rb2 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=9rb2 RCSB], [https://www.ebi.ac.uk/pdbsum/9rb2 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=9rb2 ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/Q9I3L2_PSEAE Q9I3L2_PSEAE] 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Fluorescent pseudomonads catabolize purines via uric acid and allantoin, a pathway whose end-product is glyoxylate. In this work, we show that in Pseudomonas aeruginosa strain PAO1, the ORFs PA1498-PA1502 encode a pathway that converts the resulting glyoxylate into pyruvate. The expression of this cluster of ORFs was stimulated in the presence of allantoin, and mutants containing transposon insertions in the cluster were unable to grow on allantoin as a sole carbon source. The likely operonic structure of the cluster is elucidated. We also show that the purified proteins encoded by PA1502 and PA1500 have glyoxylate carboligase (Gcl) and tartronate semialdehyde (TSA) reductase (GlxR) activity, respectively, in vitro. Gcl condenses two molecules of glyoxylate to yield TSA, which is then reduced by GlxR to yield d-glycerate. GlxR displayed much greater specificity (k (cat)/K(M)) for Gcl-derived TSA than it did for the TSA tautomer, hydroxypyruvate. This is relevant because TSA can potentially spontaneously tautomerize to yield hydroxypyruvate at neutral pH. However, kinetic and [(1)H]-NMR evidence indicate that PA1501 (which encodes a putative hydroxypyruvate isomerase, Hyi) increases the rate of the Gcl-catalysed reaction, possibly by minimizing the impact of this unwanted tautomerization. Finally, we use X-ray crystallography to show that apo-GlxR is a configurationally flexible enzyme that can adopt two distinct tetrameric assemblies in vitro.

An allantoin-inducible glyoxylate utilization pathway in Pseudomonas aeruginosa.,Parkhill SL, Little O, Askenasy I, Labrini E, Wang M, Brear PD, Cai W, Deingruber T, Yang T, Spring DR, Welch M Microbiology (Reading). 2025 Dec;171(12):001635. doi: 10.1099/mic.0.001635. PMID:41369682<ref>PMID:41369682</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 9rb2" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Pseudomonas aeruginosa]]
[[Category: Askenasy I]]
[[Category: Brear P]]
[[Category: Cai W]]
[[Category: Parkhill S]]
[[Category: Wang M]]
[[Category: Welch M]]
[[Category: Little O]]