1fpm

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[[Image:1fpm.jpg|left|200px]]
 
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==MONOVALENT CATION BINDING SITES IN N10-FORMYLTETRAHYDROFOLATE SYNTHETASE FROM MOORELLA THERMOACETICA==
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The line below this paragraph, containing "STRUCTURE_1fpm", creates the "Structure Box" on the page.
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<StructureSection load='1fpm' size='340' side='right'caption='[[1fpm]], [[Resolution|resolution]] 3.00&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'>[[1fpm]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Moorella_thermoacetica Moorella thermoacetica]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1FPM OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1FPM 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]] 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=CS:CESIUM+ION'>CS</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr>
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{{STRUCTURE_1fpm| PDB=1fpm | SCENE= }}
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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=1fpm FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1fpm OCA], [https://pdbe.org/1fpm PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1fpm RCSB], [https://www.ebi.ac.uk/pdbsum/1fpm PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1fpm ProSAT]</span></td></tr>
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</table>
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'''MONOVALENT CATION BINDING SITES IN N10-FORMYLTETRAHYDROFOLATE SYNTHETASE FROM MOORELLA THERMOACETICA'''
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== Function ==
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[https://www.uniprot.org/uniprot/FTHS_MOOTH FTHS_MOOTH]
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== Evolutionary Conservation ==
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==Overview==
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[[Image:Consurf_key_small.gif|200px|right]]
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Formyltetrahydrofolate synthetase (FTHFS) from the thermophilic homoacetogen, Moorella thermoacetica, has an optimum temperature for activity of 55-60 degrees C and requires monovalent cations for both optimal activity and stabilization of tetrameric structure at higher temperatures. The crystal structures of complexes of FTHFS with cesium and potassium ions were examined and monovalent cation binding positions identified. Unexpectedly, NH(4)(+) and K(+), both of which are strongly activating ions, bind at a different site than a moderately activating ion, Cs(+), does. Neither binding site is located in the active site. The sites are 7 A apart, but in each of them, the side chain of Glu 98, which is conserved in all known bacterial FTHFS sequences, participates in metal ion binding. Other ligands in the Cs(+) binding site are four oxygen atoms of main chain carbonyls and water molecules. The K(+) and NH(4)(+) binding site includes the carboxylate of Asp132 in addition to Glu98. Mutant FTHFS's (E98Q, E98D, and E98S) were obtained and analyzed using differential scanning calorimetry to examine the effect of these mutations on the thermostability of the enzyme with and without added K(+) ions. The addition of 0.2 M K(+) ions to the wild-type enzyme resulted in a 10 degrees C increase in the thermal denaturation temperature. No significant increase was observed in E98D or E98S. The lack of a significant effect of monovalent cations on the stability of E98D and E98S indicates that this alteration of the binding site eliminates cation binding. The thermal denaturation temperature of E98Q was 3 degrees C higher than that of the wild-type enzyme in the absence of the cation, indicating that the removal of the unbalanced, buried charge of Glu98 stabilizes the enzyme. These results confirm that Glu98 is a crucial residue in the interaction of monovalent cations with FTHFS.
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Check<jmol>
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<jmolCheckbox>
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==About this Structure==
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<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/fp/1fpm_consurf.spt"</scriptWhenChecked>
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1FPM is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Moorella_thermoacetica Moorella thermoacetica]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1FPM OCA].
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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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==Reference==
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</jmolCheckbox>
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Cation binding and thermostability of FTHFS monovalent cation binding sites and thermostability of N10-formyltetrahydrofolate synthetase from Moorella thermoacetica., Radfar R, Leaphart A, Brewer JM, Minor W, Odom JD, Dunlap RB, Lovell CR, Lebioda L, Biochemistry. 2000 Nov 28;39(47):14481-6. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/11087401 11087401]
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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=1fpm ConSurf].
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[[Category: Formate--tetrahydrofolate ligase]]
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<div style="clear:both"></div>
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__TOC__
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</StructureSection>
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[[Category: Large Structures]]
[[Category: Moorella thermoacetica]]
[[Category: Moorella thermoacetica]]
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[[Category: Single protein]]
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[[Category: Brewer JM]]
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[[Category: Brewer, J M.]]
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[[Category: Leaphart A]]
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[[Category: Leaphart, A.]]
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[[Category: Minor W]]
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[[Category: Minor, W.]]
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[[Category: Odom JD]]
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[[Category: Odom, J D.]]
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[[Category: Radfar R]]
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[[Category: Radfar, R.]]
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[[Category: Monovalent cation]]
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[[Category: Tetramer]]
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[[Category: Thermostable]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May 2 16:36:52 2008''
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Current revision

MONOVALENT CATION BINDING SITES IN N10-FORMYLTETRAHYDROFOLATE SYNTHETASE FROM MOORELLA THERMOACETICA

PDB ID 1fpm

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