1ci7: Difference between revisions

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New page: left|200px<br /><applet load="1ci7" size="450" color="white" frame="true" align="right" spinBox="true" caption="1ci7, resolution 2.6Å" /> '''TERNARY COMPLEX OF TH...
 
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'''TERNARY COMPLEX OF THYMIDYLATE SYNTHASE FROM PNEUMOCYSTIS CARINII'''<br />


==Overview==
==TERNARY COMPLEX OF THYMIDYLATE SYNTHASE FROM PNEUMOCYSTIS CARINII==
Thymidylate synthase (TS), a half-the-sites reactive enzyme, catalyzes the, final step in the de novo biosynthesis of deoxythymidine monophosphate, dTMP, required for DNA replication. The cocrystal structure of TS from, Pneumocystis carinii (PcTS), a new drug target for an important pathogen, with its substrate, deoxyuridine monophosphate (dUMP), and a cofactor, mimic, CB3717, was determined. The structure, solved at 2.6 A resolution, shows an asymmetric dimer with two molecules of the substrate dUMP bound, yet only one molecule of cofactor analogue bound. The structural evidence, reveals that upon binding cofactor analogue and forming a covalent bond, from the nucleophilic cysteine to the substrate, dUMP, at one active site, PcTS undergoes a conformational change that renders the opposite monomer, incapable of forming a covalent bond or binding a molecule of cofactor, analogue. The communication pathway between the two active sites is, evident, allowing a structural definition of the basis of half-the-sites, reactivity for thymidylate synthase and providing an example of such a, mechanism for other half-the-sites reactive enzymes.
<StructureSection load='1ci7' size='340' side='right'caption='[[1ci7]], [[Resolution|resolution]] 2.60&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[1ci7]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Pneumocystis_carinii Pneumocystis carinii]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1CI7 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1CI7 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]] 2.6&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CB3:10-PROPARGYL-5,8-DIDEAZAFOLIC+ACID'>CB3</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=1ci7 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1ci7 OCA], [https://pdbe.org/1ci7 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1ci7 RCSB], [https://www.ebi.ac.uk/pdbsum/1ci7 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1ci7 ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/TYSY_PNECA TYSY_PNECA]
== 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/ci/1ci7_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=1ci7 ConSurf].
<div style="clear:both"></div>


==About this Structure==
==See Also==
1CI7 is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Pneumocystis_carinii Pneumocystis carinii] with UMP and CB3 as [http://en.wikipedia.org/wiki/ligands ligands]. Active as [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] Full crystallographic information is available from [http://ispc.weizmann.ac.il/oca-bin/ocashort?id=1CI7 OCA].
*[[Thymidylate synthase 3D structures|Thymidylate synthase 3D structures]]
 
__TOC__
==Reference==
</StructureSection>
The structural mechanism for half-the-sites reactivity in an enzyme, thymidylate synthase, involves a relay of changes between subunits., Anderson AC, O'Neil RH, DeLano WL, Stroud RM, Biochemistry. 1999 Oct 19;38(42):13829-36. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=10529228 10529228]
[[Category: Large Structures]]
[[Category: Pneumocystis carinii]]
[[Category: Pneumocystis carinii]]
[[Category: Single protein]]
[[Category: Anderson AC]]
[[Category: Thymidylate synthase]]
[[Category: Delano WL]]
[[Category: Anderson, A.C.]]
[[Category: O'Neil RH]]
[[Category: Delano, W.L.]]
[[Category: Stroud RM]]
[[Category: Neil, R.H.O.]]
[[Category: Stroud, R.M.]]
[[Category: CB3]]
[[Category: UMP]]
[[Category: half-sites reactivity]]
[[Category: methyltransferase]]
[[Category: nucleotide biosynthesis]]
 
''Page seeded by [http://ispc.weizmann.ac.il/oca OCA ] on Tue Nov 20 12:28:45 2007''

Latest revision as of 08:57, 3 April 2024

TERNARY COMPLEX OF THYMIDYLATE SYNTHASE FROM PNEUMOCYSTIS CARINIITERNARY COMPLEX OF THYMIDYLATE SYNTHASE FROM PNEUMOCYSTIS CARINII

Structural highlights

1ci7 is a 2 chain structure with sequence from Pneumocystis carinii. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:X-ray diffraction, Resolution 2.6Å
Ligands:,
Resources:FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

TYSY_PNECA

Evolutionary Conservation

Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.

See Also

1ci7, resolution 2.60Å

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