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| | ==SOLUTION STRUCTURE OF 6-HYDROXYMETHYL-7,8-DIHYDROPTERIN PYROPHOSPHOKINASE COMPLEXED WITH MGAMPPCP== | | ==SOLUTION STRUCTURE OF 6-HYDROXYMETHYL-7,8-DIHYDROPTERIN PYROPHOSPHOKINASE COMPLEXED WITH MGAMPPCP== |
| - | <StructureSection load='1eq0' size='340' side='right'caption='[[1eq0]], [[NMR_Ensembles_of_Models | 20 NMR models]]' scene=''> | + | <StructureSection load='1eq0' size='340' side='right'caption='[[1eq0]]' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[1eq0]] is a 1 chain structure. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1EQ0 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1EQ0 FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[1eq0]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1EQ0 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1EQ0 FirstGlance]. <br> |
| - | </td></tr><tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1hka|1hka]]</td></tr> | + | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Solution NMR</td></tr> |
| - | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/2-amino-4-hydroxy-6-hydroxymethyldihydropteridine_diphosphokinase 2-amino-4-hydroxy-6-hydroxymethyldihydropteridine diphosphokinase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.7.6.3 2.7.6.3] </span></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=1eq0 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1eq0 OCA], [https://pdbe.org/1eq0 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1eq0 RCSB], [https://www.ebi.ac.uk/pdbsum/1eq0 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1eq0 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=1eq0 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1eq0 OCA], [http://pdbe.org/1eq0 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1eq0 RCSB], [http://www.ebi.ac.uk/pdbsum/1eq0 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1eq0 ProSAT]</span></td></tr> | + | |
| | </table> | | </table> |
| | + | == Function == |
| | + | [https://www.uniprot.org/uniprot/HPPK_ECOLI HPPK_ECOLI] |
| | == Evolutionary Conservation == | | == Evolutionary Conservation == |
| | [[Image:Consurf_key_small.gif|200px|right]] | | [[Image:Consurf_key_small.gif|200px|right]] |
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| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: 2-amino-4-hydroxy-6-hydroxymethyldihydropteridine diphosphokinase]] | + | [[Category: Escherichia coli]] |
| | [[Category: Large Structures]] | | [[Category: Large Structures]] |
| - | [[Category: Shi, G]] | + | [[Category: Shi G]] |
| - | [[Category: Yan, H]] | + | [[Category: Yan H]] |
| - | [[Category: Folate pterin]]
| + | |
| - | [[Category: Induced conformational change]]
| + | |
| - | [[Category: Pyrophosphokinase]]
| + | |
| - | [[Category: Pyrophosphoryl transfer]]
| + | |
| - | [[Category: Transferase]]
| + | |
| Structural highlights
Function
HPPK_ECOLI
Evolutionary Conservation
Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.
Publication Abstract from PubMed
The crystal structure of Escherichia coli 6-hydroxymethyl-7,8-dihydropterin pyrophosphokinase (HPPK) in complex with MgADP has been determined at 1.5-A resolution with a crystallographic R factor of 0.191. The solution structure of HPPK in complex with Mg(2+) and beta,gamma-methyleneadenosine 5'-triphosphate (MgAMPPCP) has been determined using a simulated annealing protocol with 3,523 experimental NMR restraints. The root mean square deviation of the ensemble of 20 refined conformers that represent the solution structure from the mean coordinate set derived from them is 0.74 +/- 0.26 A for all backbone atoms and 0.49 +/- 0.22 A when residues Pro(14), Pro(44)-Gln(50), and Arg(84)-Pro(91) are excluded. Binding of MgADP causes significant changes in the conformation and dynamical property of three loops of HPPK that are involved in catalysis. A dramatic, unusual conformational change is that loop 3 moves away from the active center significantly with some residues moving by >17 A. The binding of MgADP also stabilizes loop 1 and loop 3 but makes loop 2 more mobile. Very similar conformational and dynamical changes are observed in the NMR solution structure of HPPK.MgAMPPCP. The conformational and dynamical changes may play important roles in both substrate binding and product release in the catalytic cycle.
Unusual conformational changes in 6-hydroxymethyl-7,8-dihydropterin pyrophosphokinase as revealed by X-ray crystallography and NMR.,Xiao B, Shi G, Gao J, Blaszczyk J, Liu Q, Ji X, Yan H J Biol Chem. 2001 Oct 26;276(43):40274-81. Epub 2001 Aug 23. PMID:11546767[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Xiao B, Shi G, Gao J, Blaszczyk J, Liu Q, Ji X, Yan H. Unusual conformational changes in 6-hydroxymethyl-7,8-dihydropterin pyrophosphokinase as revealed by X-ray crystallography and NMR. J Biol Chem. 2001 Oct 26;276(43):40274-81. Epub 2001 Aug 23. PMID:11546767 doi:10.1074/jbc.M103837200
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