View source for 3c3a


==Crystal Structure of human phosphoglycerate kinase bound to 3-phosphoglycerate and L-ADP==
<StructureSection load='3c3a' size='340' side='right'caption='[[3c3a]], [[Resolution|resolution]] 2.30&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[3c3a]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3C3A OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3C3A 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=3PG:3-PHOSPHOGLYCERIC+ACID'>3PG</scene>, <scene name='pdbligand=ADP:ADENOSINE-5-DIPHOSPHATE'>ADP</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</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=3c3a FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3c3a OCA], [https://pdbe.org/3c3a PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3c3a RCSB], [https://www.ebi.ac.uk/pdbsum/3c3a PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3c3a ProSAT]</span></td></tr>
</table>
== Disease ==
[https://www.uniprot.org/uniprot/PGK1_HUMAN PGK1_HUMAN] Defects in PGK1 are the cause of phosphoglycerate kinase 1 deficiency (PGK1D) [MIM:[https://omim.org/entry/300653 300653]. It is a condition with a highly variable clinical phenotype that includes hemolytic anemia, rhabdomyolysis, myopathy and neurologic involvement. Patients can express one or more of these manifestations.<ref>PMID:8673469</ref> <ref>PMID:8043870</ref> <ref>PMID:8615693</ref> <ref>PMID:9744480</ref> <ref>PMID:2001457</ref> <ref>PMID:1586722</ref> <ref>PMID:1547346</ref> <ref>PMID:6941312</ref> <ref>PMID:6933565</ref> 
== Function ==
[https://www.uniprot.org/uniprot/PGK1_HUMAN PGK1_HUMAN] In addition to its role as a glycolytic enzyme, it seems that PGK-1 acts as a polymerase alpha cofactor protein (primer recognition protein).
== 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/c3/3c3a_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=3c3a ConSurf].
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== Publication Abstract from PubMed ==
Non-natural L-nucleoside analogues are increasingly used as therapeutic agents to treat cancer and viral infections. To be active, L-nucleosides need to be phosphorylated to their respective triphosphate metabolites. This stepwise phosphorylation relies on human enzymes capable of processing L-nucleoside enantiomers. We used crystallographic analysis to reveal the molecular basis for the low enantioselectivity and the broad specificity of human 3-phosphoglycerate kinase (hPGK), an enzyme responsible for the last step of phosphorylation of many nucleotide derivatives. Based on structures of hPGK in the absence of nucleotides, and bound to L and d forms of MgADP and MgCDP, we show that a non-specific hydrophobic clamp to the nucleotide base, as well as a water-filled cavity behind it, allows high flexibility in the interaction between PGK and the bases. This, combined with the dispensability of hydrogen bonds to the sugar moiety, and ionic interactions with the phosphate groups, results in the positioning of different nucleotides so to expose their diphosphate group in a position competent for catalysis. Since the third phosphorylation step is often rate limiting, our results are expected to alleviate in silico tailoring of L-type prodrugs to assure their efficient metabolic processing.

Molecular basis for the lack of enantioselectivity of human 3-phosphoglycerate kinase.,Gondeau C, Chaloin L, Lallemand P, Roy B, Perigaud C, Barman T, Varga A, Vas M, Lionne C, Arold ST Nucleic Acids Res. 2008 Jun;36(11):3620-9. Epub 2008 May 7. PMID:18463139<ref>PMID:18463139</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 3c3a" style="background-color:#fffaf0;"></div>

==See Also==
*[[Phosphoglycerate kinase 3D structures|Phosphoglycerate kinase 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Homo sapiens]]
[[Category: Large Structures]]
[[Category: Arold ST]]
[[Category: Chaloin L]]
[[Category: Gondeau C]]
[[Category: Lionne C]]