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[[Image:1pfk.gif|left|200px]]


{{Structure
==CRYSTAL STRUCTURE OF THE COMPLEX OF PHOSPHOFRUCTOKINASE FROM ESCHERICHIA COLI WITH ITS REACTION PRODUCTS==
|PDB= 1pfk |SIZE=350|CAPTION= <scene name='initialview01'>1pfk</scene>, resolution 2.4&Aring;
<StructureSection load='1pfk' size='340' side='right'caption='[[1pfk]], [[Resolution|resolution]] 2.40&Aring;' scene=''>
|SITE=  
== Structural highlights ==
|LIGAND= <scene name='pdbligand=FBP:FRUCTOSE-1,6-DIPHOSPHATE'>FBP</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene> and <scene name='pdbligand=ADP:ADENOSINE-5'-DIPHOSPHATE'>ADP</scene>
<table><tr><td colspan='2'>[[1pfk]] 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=1PFK OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1PFK FirstGlance]. <br>
|ACTIVITY= [http://en.wikipedia.org/wiki/6-phosphofructokinase 6-phosphofructokinase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.7.1.11 2.7.1.11]  
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.4&#8491;</td></tr>
|GENE=  
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ADP:ADENOSINE-5-DIPHOSPHATE'>ADP</scene>, <scene name='pdbligand=FBP:BETA-FRUCTOSE-1,6-DIPHOSPHATE'>FBP</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=1pfk FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1pfk OCA], [https://pdbe.org/1pfk PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1pfk RCSB], [https://www.ebi.ac.uk/pdbsum/1pfk PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1pfk ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/PFKA_ECOLI PFKA_ECOLI] Catalyzes the phosphorylation of D-fructose 6-phosphate to fructose 1,6-bisphosphate by ATP, the first committing step of glycolysis.
== 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/pf/1pfk_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=1pfk ConSurf].
<div style="clear:both"></div>


'''CRYSTAL STRUCTURE OF THE COMPLEX OF PHOSPHOFRUCTOKINASE FROM ESCHERICHIA COLI WITH ITS REACTION PRODUCTS'''
==See Also==
 
*[[Phosphofructokinase 3D structures|Phosphofructokinase 3D structures]]
 
__TOC__
==Overview==
</StructureSection>
The crystal structure of Escherichia coli phosphofructokinase complexed with its reaction products fructose 1,6-bisphosphate (Fru1,6P) and ADP/Mg2+, and the allosteric activator ADP/Mg2+, has been determined at 2.4 A resolution. The structure was solved by molecular replacement using the known structure of Bacillus stearothermophilus phosphofructokinase, and has been refined to a crystallographic R-factor of 0.165 for all data. The crystallization mixture contained the substrate fructose 6-phosphate, but the electron density maps showed clearly the presence of the product fructose 1,6-bisphosphate, presumably formed by the enzyme reaction with contaminating ATP. The crystal consists of tetrameric molecules with subunits in two different conformations despite their chemical identity. The magnesium ion in the "closed" subunit bridges the phosphate groups of the two products. In the "open" subunit, the products are about 1.5 A further apart, with the Mg2+ bound only to ADP. These two conformations probably represent two successive stages along the reaction pathway, in which the closure of the subunit is required to bring the substrates sufficiently close to react. This conformational change within the subunit is distinct from the quaternary structure change seen previously in the inactive T-state conformation. It is probably not involved in the co-operativity or allosteric control of the enzyme, since the co-operative product fructose 1,6-bisphosphate is not moved, nor are the subunit interfaces changed. The structure of the enzyme is similar to that of B. stearothermophilus phosphofructokinase, and confirms the location of the sites for the two reaction products (or substrates), and of the effector site binding the activator ADP/Mg2+. However, this structure gives a clearer picture of the active site, and of the interactions between the enzyme and its reaction products.
 
==About this Structure==
1PFK is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1PFK OCA].
 
==Reference==
Crystal structure of the complex of phosphofructokinase from Escherichia coli with its reaction products., Shirakihara Y, Evans PR, J Mol Biol. 1988 Dec 20;204(4):973-94. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/2975709 2975709]
[[Category: 6-phosphofructokinase]]
[[Category: Escherichia coli]]
[[Category: Escherichia coli]]
[[Category: Single protein]]
[[Category: Large Structures]]
[[Category: Evans, P R.]]
[[Category: Evans PR]]
[[Category: Shirakihara, Y.]]
[[Category: Shirakihara Y]]
[[Category: ADP]]
[[Category: FBP]]
[[Category: MG]]
[[Category: transferase(phosphotransferase)]]
 
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Mar 20 13:23:40 2008''

Latest revision as of 11:07, 14 February 2024

CRYSTAL STRUCTURE OF THE COMPLEX OF PHOSPHOFRUCTOKINASE FROM ESCHERICHIA COLI WITH ITS REACTION PRODUCTSCRYSTAL STRUCTURE OF THE COMPLEX OF PHOSPHOFRUCTOKINASE FROM ESCHERICHIA COLI WITH ITS REACTION PRODUCTS

Structural highlights

1pfk is a 2 chain structure with sequence from Escherichia coli. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:X-ray diffraction, Resolution 2.4Å
Ligands:, ,
Resources:FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

PFKA_ECOLI Catalyzes the phosphorylation of D-fructose 6-phosphate to fructose 1,6-bisphosphate by ATP, the first committing step of glycolysis.

Evolutionary Conservation

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

See Also

1pfk, resolution 2.40Å

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