2tmg

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{{Seed}}
 
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[[Image:2tmg.png|left|200px]]
 
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==THERMOTOGA MARITIMA GLUTAMATE DEHYDROGENASE MUTANT S128R, T158E, N117R, S160E==
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The line below this paragraph, containing "STRUCTURE_2tmg", creates the "Structure Box" on the page.
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<StructureSection load='2tmg' size='340' side='right'caption='[[2tmg]], [[Resolution|resolution]] 2.90&Aring;' scene=''>
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You may change the PDB parameter (which sets the PDB file loaded into the applet)
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== Structural highlights ==
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or the SCENE parameter (which sets the initial scene displayed when the page is loaded),
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<table><tr><td colspan='2'>[[2tmg]] is a 6 chain structure with sequence from [https://en.wikipedia.org/wiki/Thermotoga_maritima Thermotoga maritima]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2TMG OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2TMG FirstGlance]. <br>
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or leave the SCENE parameter empty for the default display.
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</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.9&#8491;</td></tr>
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<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=2tmg FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2tmg OCA], [https://pdbe.org/2tmg PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2tmg RCSB], [https://www.ebi.ac.uk/pdbsum/2tmg PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2tmg ProSAT]</span></td></tr>
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{{STRUCTURE_2tmg| PDB=2tmg | SCENE= }}
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</table>
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== Function ==
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[https://www.uniprot.org/uniprot/DHE3_THEMA DHE3_THEMA]
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== Evolutionary Conservation ==
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[[Image:Consurf_key_small.gif|200px|right]]
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Check<jmol>
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<jmolCheckbox>
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<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/tm/2tmg_consurf.spt"</scriptWhenChecked>
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<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
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<text>to colour the structure by Evolutionary Conservation</text>
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</jmolCheckbox>
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</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=2tmg ConSurf].
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<div style="clear:both"></div>
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<div style="background-color:#fffaf0;">
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== Publication Abstract from PubMed ==
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The role of an 18-residue ion-pair network, that is present in the glutamate dehydrogenase from the hyperthermophilic archaeon Pyrococcus furiosus, in conferring stability to other, less stable homologous enzymes, has been studied by introducing four new charged amino acid residues into the subunit interface of glutamate dehydrogenase from the hyperthermophilic bacterium Thermotoga maritima. These two GDHs are 55 % identical in amino acid sequence, differ greatly in thermo-activity and stability and derive from microbes with different phylogenetic positions. Amino acid substitutions were introduced as single mutations as well as in several combinations. Elucidation of the crystal structure of the quadruple mutant S128R/T158E/N117R/S160E T. maritima glutamate dehydrogenase showed that all anticipated ion-pairs are formed and that a 16-residue ion-pair network is present. Enlargement of existing networks by single amino acid substitutions unexpectedly resulted in a decrease in resistance towards thermal inactivation and thermal denaturation. However, combination of destabilizing single mutations in most cases restored stability, indicating the need for balanced charges at subunit interfaces and high cooperativity between the different members of the network. Combination of the three destabilizing mutations in triple mutant S128R/T158E/N117R resulted in an enzyme with a 30 minutes longer half-life of inactivation at 85 degrees C, a 3 degrees C higher temperature optimum for catalysis, and a 0.5 degrees C higher apparent melting temperature than that of wild-type glutamate dehydrogenase. These findings confirm the hypothesis that large ion-pair networks do indeed stabilize enzymes from hyperthermophilic organisms.
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===THERMOTOGA MARITIMA GLUTAMATE DEHYDROGENASE MUTANT S128R, T158E, N117R, S160E===
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Engineering activity and stability of Thermotoga maritima glutamate dehydrogenase. II: construction of a 16-residue ion-pair network at the subunit interface.,Lebbink JH, Knapp S, van der Oost J, Rice D, Ladenstein R, de Vos WM J Mol Biol. 1999 Jun 4;289(2):357-69. PMID:10366510<ref>PMID:10366510</ref>
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From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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</div>
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<div class="pdbe-citations 2tmg" style="background-color:#fffaf0;"></div>
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==See Also==
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The line below this paragraph, {{ABSTRACT_PUBMED_10366510}}, adds the Publication Abstract to the page
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*[[Glutamate dehydrogenase 3D structures|Glutamate dehydrogenase 3D structures]]
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(as it appears on PubMed at http://www.pubmed.gov), where 10366510 is the PubMed ID number.
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== References ==
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<references/>
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{{ABSTRACT_PUBMED_10366510}}
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__TOC__
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</StructureSection>
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==About this Structure==
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[[Category: Large Structures]]
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2TMG is a 6 chains structure of sequences from [http://en.wikipedia.org/wiki/Thermotoga_maritima Thermotoga maritima]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2TMG OCA].
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==Reference==
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<ref group="xtra">PMID:10366510</ref><references group="xtra"/>
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[[Category: Thermotoga maritima]]
[[Category: Thermotoga maritima]]
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[[Category: Knapp, S.]]
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[[Category: Knapp S]]
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[[Category: Ladenstein, R.]]
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[[Category: Ladenstein R]]
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[[Category: Lebbink, J H.G.]]
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[[Category: Lebbink JHG]]
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[[Category: Oost, J van der.]]
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[[Category: Rice D]]
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[[Category: Rice, D.]]
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[[Category: De Vos WM]]
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[[Category: Vos, W M.de.]]
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[[Category: Van der Oost J]]
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[[Category: Dehydrogenase]]
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[[Category: Glutamate]]
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[[Category: Metabolic role]]
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[[Category: Mutant]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Feb 16 17:35:53 2009''
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Current revision

THERMOTOGA MARITIMA GLUTAMATE DEHYDROGENASE MUTANT S128R, T158E, N117R, S160E

PDB ID 2tmg

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