1tsv

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[[Image:1tsv.jpg|left|200px]]
 
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{{Structure
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==THYMIDYLATE SYNTHASE R179A MUTANT==
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|PDB= 1tsv |SIZE=350|CAPTION= <scene name='initialview01'>1tsv</scene>, resolution 2.9&Aring;
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<StructureSection load='1tsv' size='340' side='right'caption='[[1tsv]], [[Resolution|resolution]] 2.90&Aring;' scene=''>
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|SITE=
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== Structural highlights ==
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|LIGAND= <scene name='pdbligand=UMP:2&#39;-DEOXYURIDINE+5&#39;-MONOPHOSPHATE'>UMP</scene>
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<table><tr><td colspan='2'>[[1tsv]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Lacticaseibacillus_casei Lacticaseibacillus casei]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1TSV OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1TSV FirstGlance]. <br>
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|ACTIVITY= <span class='plainlinks'>[http://en.wikipedia.org/wiki/Thymidylate_synthase Thymidylate synthase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.1.1.45 2.1.1.45] </span>
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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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|GENE=
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<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=UMP:2-DEOXYURIDINE+5-MONOPHOSPHATE'>UMP</scene></td></tr>
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|DOMAIN=
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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=1tsv FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1tsv OCA], [https://pdbe.org/1tsv PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1tsv RCSB], [https://www.ebi.ac.uk/pdbsum/1tsv PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1tsv ProSAT]</span></td></tr>
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|RELATEDENTRY=
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</table>
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|RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1tsv FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1tsv OCA], [http://www.ebi.ac.uk/pdbsum/1tsv PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=1tsv RCSB]</span>
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== Function ==
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}}
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[https://www.uniprot.org/uniprot/TYSY_LACCA TYSY_LACCA] Provides the sole de novo source of dTMP for DNA biosynthesis.
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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/ts/1tsv_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=1tsv ConSurf].
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<div style="clear:both"></div>
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'''THYMIDYLATE SYNTHASE R179A MUTANT'''
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==See Also==
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*[[Thymidylate synthase|Thymidylate synthase]]
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*[[Thymidylate synthase 3D structures|Thymidylate synthase 3D structures]]
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==Overview==
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__TOC__
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Invariant arginine 179, one of four arginines that are conserved in all thymidylate synthases (TS) and that bind the phosphate moiety of the substrate 2'-deoxyuridine-5'-monophosphate (dUMP), can be altered even to a negatively charged glutamic acid with little effect on kcat. In the mutant structures, ordered water or the other phosphate-binding arginines compensate for the hydrogen bonds made by Arg179 in the wild-type enzyme and there is almost no change in the conformation or binding site of dUMP. Correlation of dUMP Kds for TS R179A and TS R179K with the structures of their binary complexes shows, that the positive charge on Arg179 contributes significantly to dUMP binding affinity. kcat/K(m) for dUMP measures the rate of dUMP binding to TS during the ordered bi-substrate reaction, and in the ternary complex dUMP provides a binding surface for the cofactor. kcat/K(m) reflects the ability of the enzyme to accept a properly oriented dUMP for catalysis and is less sensitive than is Kd to the changes in electrostatics at the phosphate binding site.
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</StructureSection>
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[[Category: Lacticaseibacillus casei]]
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==About this Structure==
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[[Category: Large Structures]]
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1TSV is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Lactobacillus_casei Lactobacillus casei]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1TSV OCA].
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[[Category: Finer-Moore J]]
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[[Category: Stroud RM]]
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==Reference==
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Contribution of a salt bridge to binding affinity and dUMP orientation to catalytic rate: mutation of a substrate-binding arginine in thymidylate synthase., Finer-Moore JS, Fauman EB, Morse RJ, Santi DV, Stroud RM, Protein Eng. 1996 Jan;9(1):69-75. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/9053905 9053905]
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[[Category: Lactobacillus casei]]
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[[Category: Single protein]]
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[[Category: Thymidylate synthase]]
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[[Category: Finer-Moore, J.]]
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[[Category: Stroud, R M.]]
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[[Category: methyltransferase]]
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[[Category: nucleotide biosynthesis]]
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[[Category: transferase]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Mar 31 00:00:32 2008''
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Current revision

THYMIDYLATE SYNTHASE R179A MUTANT

PDB ID 1tsv

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