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[[Image:4tms.jpg|left|200px]]


{{Structure
==PLASTIC ADAPTATION TOWARD MUTATIONS IN PROTEINS: STRUCTURAL COMPARISON OF THYMIDYLATE SYNTHASES==
|PDB= 4tms |SIZE=350|CAPTION= <scene name='initialview01'>4tms</scene>, resolution 2.35&Aring;
<StructureSection load='4tms' size='340' side='right'caption='[[4tms]], [[Resolution|resolution]] 2.35&Aring;' scene=''>
|SITE=  
== Structural highlights ==
|LIGAND= <scene name='pdbligand=PO4:PHOSPHATE+ION'>PO4</scene>
<table><tr><td colspan='2'>[[4tms]] 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=4TMS OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4TMS FirstGlance]. <br>
|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>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.35&#8491;</td></tr>
|GENE=  
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=PO4:PHOSPHATE+ION'>PO4</scene></td></tr>
|DOMAIN=
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=4tms FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4tms OCA], [https://pdbe.org/4tms PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4tms RCSB], [https://www.ebi.ac.uk/pdbsum/4tms PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4tms ProSAT]</span></td></tr>
|RELATEDENTRY=
</table>
|RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4tms FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4tms OCA], [http://www.ebi.ac.uk/pdbsum/4tms PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=4tms RCSB]</span>
== Function ==
}}
[https://www.uniprot.org/uniprot/TYSY_LACCA TYSY_LACCA] Provides the sole de novo source of dTMP for DNA biosynthesis.
== 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/tm/4tms_consurf.spt"</scriptWhenChecked>
    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.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=4tms ConSurf].
<div style="clear:both"></div>


'''PLASTIC ADAPTATION TOWARD MUTATIONS IN PROTEINS: STRUCTURAL COMPARISON OF THYMIDYLATE SYNTHASES'''
==See Also==
 
*[[Thymidylate synthase 3D structures|Thymidylate synthase 3D structures]]
 
__TOC__
==Overview==
</StructureSection>
The structure of thymidylate synthase (TS) from Escherichia coli was solved from cubic crystals with a = 133 A grown under reducing conditions at pH 7.0, and refined to R = 22% at 2.1 A resolution. The structure is compared with that from Lactobacillus casei solved to R = 21% at 2.3 A resolution. The structures are compared using a difference distance matrix, which identifies a common core of residues that retains the same relationship to one another in both species. After subtraction of the effects of a 50 amino acid insert present in Lactobacillus casei, differences in position of atoms correlate with temperature factors and with distance from the nearest substituted residue. The dependence of structural difference on thermal factor is parameterized and reflects both errors in coordinates that correlate with thermal factor, and the increased width of the energy well in which atoms of high thermal factor lie. The dependence of structural difference on distance from the nearest substitution also depends on thermal factors and shows an exponential dependence with half maximal effect at 3.0 A from the substitution. This represents the plastic accommodation of the protein which is parameterized in terms of thermal B factor and distance from a mutational change.
[[Category: Lacticaseibacillus casei]]
 
[[Category: Large Structures]]
==About this Structure==
[[Category: Finer-Moore J]]
4TMS 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=4TMS OCA].
[[Category: Stroud R]]
 
==Reference==
Plastic adaptation toward mutations in proteins: structural comparison of thymidylate synthases., Perry KM, Fauman EB, Finer-Moore JS, Montfort WR, Maley GF, Maley F, Stroud RM, Proteins. 1990;8(4):315-33. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/2128651 2128651]
[[Category: Lactobacillus casei]]
[[Category: Single protein]]
[[Category: Thymidylate synthase]]
[[Category: Finer-Moore, J.]]
[[Category: Stroud, R.]]
[[Category: transferase (methyltranferase)]]
 
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