View source for 2bbq


==STRUCTURAL BASIS FOR RECOGNITION OF POLYGLUTAMYL FOLATES BY THYMIDYLATE SYNTHASE==
<StructureSection load='2bbq' size='340' side='right'caption='[[2bbq]], [[Resolution|resolution]] 2.30&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[2bbq]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2BBQ OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2BBQ FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.3&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=PFG:10-PARPARGYL-5,8-DIDEAZAFOLATE-4-GLUTAMIC+ACID'>PFG</scene>, <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'>[https://proteopedia.org/fgij/fg.htm?mol=2bbq FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2bbq OCA], [https://pdbe.org/2bbq PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2bbq RCSB], [https://www.ebi.ac.uk/pdbsum/2bbq PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2bbq ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/TYSY_ECOLI TYSY_ECOLI] Provides the sole de novo source of dTMP for DNA biosynthesis. This protein also binds to its mRNA thus repressing its own translation.
== Evolutionary Conservation ==
[[Image:Consurf_key_small.gif|200px|right]]
Check<jmol>
  <jmolCheckbox>
    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/bb/2bbq_consurf.spt"</scriptWhenChecked>
    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview03.spt</scriptWhenUnchecked>
    <text>to colour the structure by Evolutionary Conservation</text>
  </jmolCheckbox>
</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=2bbq ConSurf].
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== Publication Abstract from PubMed ==
Thymidylate synthase (TS) catalyzes the final step in the de novo synthesis of thymidine. In vivo TS binds a polyglutamyl cofactor, polyglutamyl methylenetetrahydrofolate (CH2-H4folate), which serves as a carbon donor. Glutamate residues on the cofactor contribute as much as 3.7 kcal to the interaction between the cofactor, substrate, and enzyme. Because many ligand/receptor interactions appear to be driven largely by hydrophobic forces, it is surprising that the addition of hydrophilic, soluble groups such as glutamates increases the affinity of the cofactor for TS. The structure of a polyglutamyl cofactor analog bound in ternary complex with deoxyuridine monophosphate (dUMP) and Escherichia coli TS reveals how the polyglutamyl moiety is positioned in TS and accounts in a qualitative way for the binding contributions of the different individual glutamate residues. The polyglutamyl moiety is not rigidly fixed by its interaction with the protein except for the first glutamate residue nearest the p-aminobenzoic acid ring of folate. Each additional glutamate is progressively more disordered than the previous one in the chain. The position of the second and third glutamate residues on the protein surface suggests that the polyglutamyl binding site could be utilized by a new family of inhibitors that might fill the binding area more effectively than polyglutamate.

Structural basis for recognition of polyglutamyl folates by thymidylate synthase.,Kamb A, Finer-Moore J, Calvert AH, Stroud RM Biochemistry. 1992 Oct 20;31(41):9883-90. PMID:1390771<ref>PMID:1390771</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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<div class="pdbe-citations 2bbq" style="background-color:#fffaf0;"></div>

==See Also==
*[[Thymidylate synthase 3D structures|Thymidylate synthase 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Escherichia coli]]
[[Category: Large Structures]]
[[Category: Finer-Moore J]]
[[Category: Kamb A]]
[[Category: Stroud RM]]