View source for 2xdf


==Solution Structure of the Enzyme I Dimer Complexed with HPr Using Residual Dipolar Couplings and Small Angle X-Ray Scattering==
<StructureSection load='2xdf' size='340' side='right'caption='[[2xdf]], [[NMR_Ensembles_of_Models | 2 NMR models]]' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[2xdf]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Ecobd Ecobd]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2XDF OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2XDF 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;'>[[3eze|3eze]], [[1ezd|1ezd]], [[2ezc|2ezc]], [[1ezb|1ezb]], [[1eza|1eza]], [[3ezb|3ezb]], [[3eza|3eza]], [[1zym|1zym]], [[2eza|2eza]], [[2ezb|2ezb]], [[1ezc|1ezc]]</div></td></tr>
<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[https://en.wikipedia.org/wiki/Phosphoenolpyruvate--protein_phosphotransferase Phosphoenolpyruvate--protein phosphotransferase], with EC number [https://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.7.3.9 2.7.3.9] </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=2xdf FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2xdf OCA], [https://pdbe.org/2xdf PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2xdf RCSB], [https://www.ebi.ac.uk/pdbsum/2xdf PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2xdf ProSAT]</span></td></tr>
</table>
== Function ==
[[https://www.uniprot.org/uniprot/PT1_ECOLI PT1_ECOLI]] General (non sugar-specific) component of the phosphoenolpyruvate-dependent sugar phosphotransferase system (sugar PTS). This major carbohydrate active-transport system catalyzes the phosphorylation of incoming sugar substrates concomitantly with their translocation across the cell membrane. Enzyme I transfers the phosphoryl group from phosphoenolpyruvate (PEP) to the phosphoryl carrier protein (HPr).<ref>PMID:7876255</ref>  [[https://www.uniprot.org/uniprot/PTHP_ECO57 PTHP_ECO57]] General (non sugar-specific) component of the phosphoenolpyruvate-dependent sugar phosphotransferase system (sugar PTS). This major carbohydrate active-transport system catalyzes the phosphorylation of incoming sugar substrates concomitantly with their translocation across the cell membrane. The phosphoryl group from phosphoenolpyruvate (PEP) is transferred to the phosphoryl carrier protein HPr by enzyme I. Phospho-HPr then transfers it to the permease (enzymes II/III) (By similarity). 
== 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/xd/2xdf_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=2xdf ConSurf].
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== Publication Abstract from PubMed ==
The solution structures of free Enzyme I (EI, approximately 128 kDa, 575 x 2 residues), the first enzyme in the bacterial phosphotransferase system, and its complex with HPr ( approximately 146 kDa) have been solved using novel methodology that makes use of prior structural knowledge (namely, the structures of the dimeric EIC domain and the isolated EIN domain both free and complexed to HPr), combined with residual dipolar coupling (RDC), small- (SAXS) and wide- (WAXS) angle X-ray scattering and small-angle neutron scattering (SANS) data. The calculational strategy employs conjoined rigid body/torsion/Cartesian simulated annealing, and incorporates improvements in calculating and refining against SAXS/WAXS data that take into account complex molecular shapes in the description of the solvent layer resulting in a better representation of the SAXS/WAXS data. The RDC data orient the symmetrically related EIN domains relative to the C(2) symmetry axis of the EIC dimer, while translational, shape, and size information is provided by SAXS/WAXS. The resulting structures are independently validated by SANS. Comparison of the structures of the free EI and the EI-HPr complex with that of the crystal structure of a trapped phosphorylated EI intermediate reveals large ( approximately 70-90 degrees ) hinge body rotations of the two subdomains comprising the EIN domain, as well as of the EIN domain relative to the dimeric EIC domain. These large-scale interdomain motions shed light on the structural transitions that accompany the catalytic cycle of EI.

Solution Structure of the 128 kDa Enzyme I Dimer from Escherichia coli and Its 146 kDa Complex with HPr Using Residual Dipolar Couplings and Small- and Wide-Angle X-ray Scattering.,Schwieters CD, Suh JY, Grishaev A, Ghirlando R, Takayama Y, Clore GM J Am Chem Soc. 2010 Aug 23. PMID:20731394<ref>PMID:20731394</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 2xdf" style="background-color:#fffaf0;"></div>

==See Also==
*[[Phosphocarrier protein HPr 3D structures|Phosphocarrier protein HPr 3D structures]]
*[[Phosphotransferase 3D structures|Phosphotransferase 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Ecobd]]
[[Category: Large Structures]]
[[Category: Phosphoenolpyruvate--protein phosphotransferase]]
[[Category: Clore, G M]]
[[Category: Grishaev, A]]
[[Category: Guirlando, R]]
[[Category: Schwieters, C D]]
[[Category: Suh, J Y]]
[[Category: Takayama, Y]]
[[Category: Sugar transport]]
[[Category: Transferase]]