1rv8: Difference between revisions

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[[Image:1rv8.jpg|left|200px]]


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==Class II fructose-1,6-bisphosphate aldolase from Thermus aquaticus in complex with cobalt==
The line below this paragraph, containing "STRUCTURE_1rv8", creates the "Structure Box" on the page.
<StructureSection load='1rv8' size='340' side='right'caption='[[1rv8]], [[Resolution|resolution]] 2.30&Aring;' scene=''>
You may change the PDB parameter (which sets the PDB file loaded into the applet)  
== Structural highlights ==
or the SCENE parameter (which sets the initial scene displayed when the page is loaded),
<table><tr><td colspan='2'>[[1rv8]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Thermus_aquaticus Thermus aquaticus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1RV8 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1RV8 FirstGlance]. <br>
or leave the SCENE parameter empty for the default display.
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.3&#8491;</td></tr>
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<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CO:COBALT+(II)+ION'>CO</scene>, <scene name='pdbligand=NA:SODIUM+ION'>NA</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr>
{{STRUCTURE_1rv8| PDB=1rv8 |  SCENE= }}
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1rv8 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1rv8 OCA], [https://pdbe.org/1rv8 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1rv8 RCSB], [https://www.ebi.ac.uk/pdbsum/1rv8 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1rv8 ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/Q9RHA2_THEAQ Q9RHA2_THEAQ]
== 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/rv/1rv8_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/main_output.php?pdb_ID=1rv8 ConSurf].
<div style="clear:both"></div>


'''Class II fructose-1,6-bisphosphate aldolase from Thermus aquaticus in complex with cobalt'''
==See Also==
 
*[[Aldolase 3D structures|Aldolase 3D structures]]
 
__TOC__
==Overview==
</StructureSection>
Fructose-1,6-bisphosphate (FBP) aldolase is an essential glycolytic enzyme that reversibly cleaves its ketohexose substrate into triose phosphates. Here we report the crystal structure of a metallo-dependent or class II FBP aldolase from an extreme thermophile, Thermus aquaticus (Taq). The quaternary structure reveals a tetramer composed of two dimers related by a 2-fold axis. Taq FBP aldolase subunits exhibit two distinct conformational states corresponding to loop regions that are in either open or closed position with respect to the active site. Loop closure remodels the disposition of chelating active site histidine residues. In subunits corresponding to the open conformation, the metal cofactor, Co(2+), is sequestered in the active site, whereas for subunits in the closed conformation, the metal cation exchanges between two mutually exclusive binding loci, corresponding to a site at the active site surface and an interior site vicinal to the metal-binding site in the open conformation. Cofactor site exchange is mediated by rotations of the chelating histidine side chains that are coupled to the prior conformational change of loop closure. Sulfate anions are consistent with the location of the phosphate-binding sites of the FBP substrate and determine not only the previously unknown second phosphate-binding site but also provide a mechanism that regulates loop closure during catalysis. Modeling of FBP substrate into the active site is consistent with binding by the acyclic keto form, a minor solution species, and with the metal cofactor mediating keto bond polarization. The Taq FBP aldolase structure suggests a structural basis for different metal cofactor specificity than in Escherichia coli FBP aldolase structures, and we discuss its potential role during catalysis. Comparison with the E. coli structure also indicates a structural basis for thermostability by Taq FBP aldolase.
[[Category: Large Structures]]
 
==About this Structure==
1RV8 is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Thermus_aquaticus Thermus aquaticus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1RV8 OCA].
 
==Reference==
Induced fit movements and metal cofactor selectivity of class II aldolases: structure of Thermus aquaticus fructose-1,6-bisphosphate aldolase., Izard T, Sygusch J, J Biol Chem. 2004 Mar 19;279(12):11825-33. Epub 2003 Dec 29. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/14699122 14699122]
[[Category: Fructose-bisphosphate aldolase]]
[[Category: Single protein]]
[[Category: Thermus aquaticus]]
[[Category: Thermus aquaticus]]
[[Category: Izard, T.]]
[[Category: Izard T]]
[[Category: Sygusch, J.]]
[[Category: Sygusch J]]
[[Category: Class ii aldolase]]
[[Category: Metal-depdendent aldolase]]
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May  3 07:57:01 2008''

Latest revision as of 11:26, 14 February 2024

Class II fructose-1,6-bisphosphate aldolase from Thermus aquaticus in complex with cobaltClass II fructose-1,6-bisphosphate aldolase from Thermus aquaticus in complex with cobalt

Structural highlights

1rv8 is a 4 chain structure with sequence from Thermus aquaticus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:X-ray diffraction, Resolution 2.3Å
Ligands:, ,
Resources:FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

Q9RHA2_THEAQ

Evolutionary Conservation

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

See Also

1rv8, resolution 2.30Å

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