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| | <StructureSection load='1xdo' size='340' side='right'caption='[[1xdo]], [[Resolution|resolution]] 3.00Å' scene=''> | | <StructureSection load='1xdo' size='340' side='right'caption='[[1xdo]], [[Resolution|resolution]] 3.00Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[1xdo]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/"bacillus_coli"_migula_1895 "bacillus coli" migula 1895]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1XDO OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1XDO FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[1xdo]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1XDO OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1XDO FirstGlance]. <br> |
| - | </td></tr><tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat"><div style='overflow: auto; max-height: 3em;'>[[1xdp|1xdp]]</div></td></tr> | + | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 3Å</td></tr> |
| - | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">ppk ([https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=562 "Bacillus coli" Migula 1895])</td></tr>
| + | |
| - | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[https://en.wikipedia.org/wiki/Polyphosphate_kinase Polyphosphate kinase], with EC number [https://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.7.4.1 2.7.4.1] </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=1xdo FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1xdo OCA], [https://pdbe.org/1xdo PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1xdo RCSB], [https://www.ebi.ac.uk/pdbsum/1xdo PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1xdo ProSAT]</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=1xdo FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1xdo OCA], [https://pdbe.org/1xdo PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1xdo RCSB], [https://www.ebi.ac.uk/pdbsum/1xdo PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1xdo ProSAT]</span></td></tr> |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[https://www.uniprot.org/uniprot/PPK_ECOLI PPK_ECOLI]] Catalyzes the reversible transfer of the terminal phosphate of ATP to form a long-chain polyphosphate (polyP). Can form linear polymers of orthophosphate with chain lengths up to 1000 or more. Can also act in the reverse direction to form ATP in the presence of excess ADP. Can also use GTP instead of ATP; but the efficiency of GTP is 5% that of ATP.<ref>PMID:8962061</ref>
| + | [https://www.uniprot.org/uniprot/PPK1_ECOLI PPK1_ECOLI] Catalyzes the reversible transfer of the terminal phosphate of ATP to form a long-chain polyphosphate (polyP). Can form linear polymers of orthophosphate with chain lengths up to 1000 or more. Can use GTP instead of ATP, but the efficiency of GTP is 5% that of ATP. Also exhibits several other enzymatic activities, which include: ATP synthesis from polyP in the presence of excess ADP, general nucleoside-diphosphate kinase activity, linear guanosine 5'-tetraphosphate (ppppG) synthesis and autophosphorylation.<ref>PMID:10660553</ref> <ref>PMID:8962061</ref> |
| | == 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: Bacillus coli migula 1895]] | + | [[Category: Escherichia coli]] |
| | [[Category: Large Structures]] | | [[Category: Large Structures]] |
| - | [[Category: Polyphosphate kinase]]
| + | [[Category: Huang W]] |
| - | [[Category: Huang, W]] | + | [[Category: Lee SS]] |
| - | [[Category: Lee, S S]] | + | [[Category: Xu W]] |
| - | [[Category: Xu, W]] | + | [[Category: Zhu Y]] |
| - | [[Category: Zhu, Y]] | + | |
| - | [[Category: E coli polyphosphate kinase]]
| + | |
| - | [[Category: Ppk]]
| + | |
| - | [[Category: Transferase]]
| + | |
| Structural highlights
Function
PPK1_ECOLI Catalyzes the reversible transfer of the terminal phosphate of ATP to form a long-chain polyphosphate (polyP). Can form linear polymers of orthophosphate with chain lengths up to 1000 or more. Can use GTP instead of ATP, but the efficiency of GTP is 5% that of ATP. Also exhibits several other enzymatic activities, which include: ATP synthesis from polyP in the presence of excess ADP, general nucleoside-diphosphate kinase activity, linear guanosine 5'-tetraphosphate (ppppG) synthesis and autophosphorylation.[1] [2]
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
Polyphosphate (polyP), a linear polymer of hundreds of orthophosphate residues, exists in all tested cells in nature, from pathogenic bacteria to mammals. In bacteria, polyP has a crucial role in stress responses and stationary-phase survival. Polyphosphate kinase (PPK) is the principal enzyme that catalyses the synthesis of polyP in bacteria. It has been shown that PPK is required for bacterial motility, biofilm formation and the production of virulence factors. PPK inhibitors may thus provide a unique therapeutic opportunity against antibiotic-resistant pathogens. Here, we report crystal structures of full-length Escherichia coli PPK and its complex with AMPPNP (beta-gamma-imidoadenosine 5-phosphate). PPK forms an interlocked dimer, with each 80 kDa monomer containing four structural domains. The PPK active site is located in a tunnel, which contains a unique ATP-binding pocket and may accommodate the translocation of synthesized polyP. The PPK structure has laid the foundation for understanding the initiation of polyP synthesis by PPK.
Crystal structure of a polyphosphate kinase and its implications for polyphosphate synthesis.,Zhu Y, Huang W, Lee SS, Xu W EMBO Rep. 2005 Jul;6(7):681-7. PMID:15947782[3]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ Tzeng CM, Kornberg A. The multiple activities of polyphosphate kinase of Escherichia coli and their subunit structure determined by radiation target analysis. J Biol Chem. 2000 Feb 11;275(6):3977-83. PMID:10660553 doi:10.1074/jbc.275.6.3977
- ↑ Kumble KD, Ahn K, Kornberg A. Phosphohistidyl active sites in polyphosphate kinase of Escherichia coli. Proc Natl Acad Sci U S A. 1996 Dec 10;93(25):14391-5. PMID:8962061
- ↑ Zhu Y, Huang W, Lee SS, Xu W. Crystal structure of a polyphosphate kinase and its implications for polyphosphate synthesis. EMBO Rep. 2005 Jul;6(7):681-7. PMID:15947782
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