6nn8: Difference between revisions
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<StructureSection load='6nn8' size='340' side='right'caption='[[6nn8]], [[Resolution|resolution]] 2.42Å' scene=''> | <StructureSection load='6nn8' size='340' side='right'caption='[[6nn8]], [[Resolution|resolution]] 2.42Å' scene=''> | ||
== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>[[6nn8]] is a 8 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6NN8 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=6NN8 FirstGlance]. <br> | <table><tr><td colspan='2'>[[6nn8]] is a 8 chain structure with sequence from [http://en.wikipedia.org/wiki/Human Human]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6NN8 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=6NN8 FirstGlance]. <br> | ||
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=EDO:1,2-ETHANEDIOL'>EDO</scene></td></tr> | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=EDO:1,2-ETHANEDIOL'>EDO</scene></td></tr> | ||
<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">PKLR, PK1, PKL ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 HUMAN])</td></tr> | |||
<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Pyruvate_kinase Pyruvate kinase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.7.1.40 2.7.1.40] </span></td></tr> | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Pyruvate_kinase Pyruvate kinase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.7.1.40 2.7.1.40] </span></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=6nn8 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6nn8 OCA], [http://pdbe.org/6nn8 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=6nn8 RCSB], [http://www.ebi.ac.uk/pdbsum/6nn8 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=6nn8 ProSAT]</span></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=6nn8 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6nn8 OCA], [http://pdbe.org/6nn8 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=6nn8 RCSB], [http://www.ebi.ac.uk/pdbsum/6nn8 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=6nn8 ProSAT]</span></td></tr> | ||
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== Function == | == Function == | ||
[[http://www.uniprot.org/uniprot/KPYR_HUMAN KPYR_HUMAN]] Plays a key role in glycolysis (By similarity). | [[http://www.uniprot.org/uniprot/KPYR_HUMAN KPYR_HUMAN]] Plays a key role in glycolysis (By similarity). | ||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
Human liver pyruvate kinase (hLPYK) converts phosphoenolpyruvate to pyruvate in the final step of glycolysis. hLPYK is allosterically activated by fructose-1,6-bisphosphate (Fru-1,6-BP). The allosteric site, as defined by previous structural studies, is located in domain C between the phosphate-binding loop (residues 444-449) and the allosteric loop (residues 527-533). In this study, the X-ray crystal structures of four hLPYK variants were solved to make structural correlations with existing functional data. The variants are D499N, W527H, Delta529/S531G (called GGG here) and S531E. The results revealed a conformational toggle between the open and closed positions of the allosteric loop. In the absence of Fru-1,6-BP the open position is stabilized, in part, by a cation-pi bond between Trp527 and Arg538' (from an adjacent monomer). In the S531E variant glutamate binds in place of the 6'-phosphate of Fru-1,6-BP in the allosteric site, leading to partial allosteric activation. Finally, the structure of the D499N mutant does not provide structural evidence for the previously observed allosteric activation of the D499N variant. | |||
Changes in the allosteric site of human liver pyruvate kinase upon activator binding include the breakage of an intersubunit cation-pi bond.,McFarlane JS, Ronnebaum TA, Meneely KM, Chilton A, Fenton AW, Lamb AL Acta Crystallogr F Struct Biol Commun. 2019 Jun 1;75(Pt 6):461-469. doi:, 10.1107/S2053230X19007209. Epub 2019 Jun 10. PMID:31204694<ref>PMID:31204694</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
</div> | |||
<div class="pdbe-citations 6nn8" style="background-color:#fffaf0;"></div> | |||
== References == | == References == | ||
<references/> | <references/> | ||
__TOC__ | __TOC__ | ||
</StructureSection> | </StructureSection> | ||
[[Category: Human]] | |||
[[Category: Large Structures]] | [[Category: Large Structures]] | ||
[[Category: Pyruvate kinase]] | [[Category: Pyruvate kinase]] | ||