2gn1
From Proteopedia
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==Crystal structure of dimeric biodegradative threonine deaminase (TdcB) from Salmonella typhimurium at 2.2A resolution (Triclinic form with one dimer of TdcB in the asymmetric unit)== | ==Crystal structure of dimeric biodegradative threonine deaminase (TdcB) from Salmonella typhimurium at 2.2A resolution (Triclinic form with one dimer of TdcB in the asymmetric unit)== | ||
| - | <StructureSection load='2gn1' size='340' side='right' caption='[[2gn1]], [[Resolution|resolution]] 2.20Å' scene=''> | + | <StructureSection load='2gn1' size='340' side='right'caption='[[2gn1]], [[Resolution|resolution]] 2.20Å' scene=''> |
== Structural highlights == | == Structural highlights == | ||
| - | <table><tr><td colspan='2'>[[2gn1]] is a 2 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2GN1 OCA]. For a <b>guided tour on the structure components</b> use [ | + | <table><tr><td colspan='2'>[[2gn1]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Salmonella_enterica_subsp._enterica_serovar_Typhimurium Salmonella enterica subsp. enterica serovar Typhimurium]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2GN1 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2GN1 FirstGlance]. <br> |
| - | </td></tr><tr id=' | + | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.2Å</td></tr> |
| - | <tr id=' | + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=LLP:(2S)-2-AMINO-6-[[3-HYDROXY-2-METHYL-5-(PHOSPHONOOXYMETHYL)PYRIDIN-4-YL]METHYLIDENEAMINO]HEXANOIC+ACID'>LLP</scene>, <scene name='pdbligand=NA:SODIUM+ION'>NA</scene></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=2gn1 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2gn1 OCA], [https://pdbe.org/2gn1 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2gn1 RCSB], [https://www.ebi.ac.uk/pdbsum/2gn1 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2gn1 ProSAT]</span></td></tr> | |
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| - | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[ | + | |
</table> | </table> | ||
== Function == | == Function == | ||
| - | [ | + | [https://www.uniprot.org/uniprot/TDCB_SALTY TDCB_SALTY] Catalyzes the anaerobic formation of alpha-ketobutyrate and ammonia from threonine in a two-step reaction. The first step involved a dehydration of threonine and a production of enamine intermediates (aminocrotonate), which tautomerizes to its imine form (iminobutyrate). Both intermediates are unstable and short-lived. The second step is the nonenzymatic hydrolysis of the enamine/imine intermediates to form 2-ketobutyrate and free ammonia. In the low water environment of the cell, the second step is accelerated by RidA. TdcB also dehydrates serine to yield pyruvate via analogous enamine/imine intermediates.<ref>PMID:17046821</ref> |
== Evolutionary Conservation == | == Evolutionary Conservation == | ||
[[Image:Consurf_key_small.gif|200px|right]] | [[Image:Consurf_key_small.gif|200px|right]] | ||
Check<jmol> | Check<jmol> | ||
<jmolCheckbox> | <jmolCheckbox> | ||
| - | <scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/gn/2gn1_consurf.spt"</scriptWhenChecked> | + | <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/gn/2gn1_consurf.spt"</scriptWhenChecked> |
<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked> | <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked> | ||
<text>to colour the structure by Evolutionary Conservation</text> | <text>to colour the structure by Evolutionary Conservation</text> | ||
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==See Also== | ==See Also== | ||
| - | *[[Deaminase|Deaminase]] | + | *[[Deaminase 3D structures|Deaminase 3D structures]] |
== References == | == References == | ||
<references/> | <references/> | ||
__TOC__ | __TOC__ | ||
</StructureSection> | </StructureSection> | ||
| - | [[Category: | + | [[Category: Large Structures]] |
| - | [[Category: | + | [[Category: Salmonella enterica subsp. enterica serovar Typhimurium]] |
| - | [[Category: | + | [[Category: Murthy MRN]] |
| - | [[Category: | + | [[Category: Savithri HS]] |
| - | [[Category: | + | [[Category: Simanshu DK]] |
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Current revision
Crystal structure of dimeric biodegradative threonine deaminase (TdcB) from Salmonella typhimurium at 2.2A resolution (Triclinic form with one dimer of TdcB in the asymmetric unit)
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