1tsx: Difference between revisions

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<StructureSection load='1tsx' size='340' side='right'caption='[[1tsx]], [[Resolution|resolution]] 2.50&Aring;' scene=''>
<StructureSection load='1tsx' size='340' side='right'caption='[[1tsx]], [[Resolution|resolution]] 2.50&Aring;' scene=''>
== Structural highlights ==
== Structural highlights ==
<table><tr><td colspan='2'>[[1tsx]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/"bacillus_a"_von_freudenreich_1890 "bacillus a" von freudenreich 1890]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1TSX OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1TSX FirstGlance]. <br>
<table><tr><td colspan='2'>[[1tsx]] 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=1TSX OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1TSX FirstGlance]. <br>
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=UMP:2-DEOXYURIDINE+5-MONOPHOSPHATE'>UMP</scene></td></tr>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.5&#8491;</td></tr>
<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><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></td></tr>
<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>
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1tsx FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1tsx OCA], [http://pdbe.org/1tsx PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1tsx RCSB], [http://www.ebi.ac.uk/pdbsum/1tsx PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1tsx ProSAT]</span></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=1tsx FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1tsx OCA], [https://pdbe.org/1tsx PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1tsx RCSB], [https://www.ebi.ac.uk/pdbsum/1tsx PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1tsx ProSAT]</span></td></tr>
</table>
</table>
== Function ==
== Function ==
[[http://www.uniprot.org/uniprot/TYSY_LACCA TYSY_LACCA]] Provides the sole de novo source of dTMP for DNA biosynthesis.  
[https://www.uniprot.org/uniprot/TYSY_LACCA TYSY_LACCA] Provides the sole de novo source of dTMP for DNA biosynthesis.
== Evolutionary Conservation ==
== Evolutionary Conservation ==
[[Image:Consurf_key_small.gif|200px|right]]
[[Image:Consurf_key_small.gif|200px|right]]
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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=1tsx ConSurf].
</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=1tsx ConSurf].
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<div style="clear:both"></div>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
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.
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:9053905<ref>PMID:9053905</ref>
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 1tsx" style="background-color:#fffaf0;"></div>


==See Also==
==See Also==
*[[Thymidylate synthase|Thymidylate synthase]]
*[[Thymidylate synthase 3D structures|Thymidylate synthase 3D structures]]
== References ==
<references/>
__TOC__
__TOC__
</StructureSection>
</StructureSection>
[[Category: Bacillus a von freudenreich 1890]]
[[Category: Lacticaseibacillus casei]]
[[Category: Large Structures]]
[[Category: Large Structures]]
[[Category: Thymidylate synthase]]
[[Category: Finer-Moore J]]
[[Category: Finer-Moore, J]]
[[Category: Stroud RM]]
[[Category: Stroud, R M]]
[[Category: Methyltransferase]]
[[Category: Nucleotide biosynthesis]]
[[Category: Transferase]]

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