1poh

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[[Image:1poh.jpg|left|200px]]
 
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==THE 2.0 ANGSTROMS RESOLUTION STRUCTURE OF ESCHERICHIA COLI HISTIDINE-CONTAINING PHOSPHOCARRIER PROTEIN HPR: A REDETERMINATION==
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The line below this paragraph, containing "STRUCTURE_1poh", creates the "Structure Box" on the page.
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<StructureSection load='1poh' size='340' side='right'caption='[[1poh]], [[Resolution|resolution]] 2.00&Aring;' scene=''>
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You may change the PDB parameter (which sets the PDB file loaded into the applet)
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== Structural highlights ==
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or the SCENE parameter (which sets the initial scene displayed when the page is loaded),
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<table><tr><td colspan='2'>[[1poh]] is a 1 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=1POH OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1POH FirstGlance]. <br>
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or leave the SCENE parameter empty for the default display.
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</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&#8491;</td></tr>
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<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr>
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{{STRUCTURE_1poh| PDB=1poh | SCENE= }}
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<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1poh FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1poh OCA], [https://pdbe.org/1poh PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1poh RCSB], [https://www.ebi.ac.uk/pdbsum/1poh PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1poh ProSAT]</span></td></tr>
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</table>
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== Function ==
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[https://www.uniprot.org/uniprot/PTHP_ECOLI PTHP_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. 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).
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== Evolutionary Conservation ==
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[[Image:Consurf_key_small.gif|200px|right]]
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Check<jmol>
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<jmolCheckbox>
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<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/po/1poh_consurf.spt"</scriptWhenChecked>
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<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
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<text>to colour the structure by Evolutionary Conservation</text>
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</jmolCheckbox>
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</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=1poh ConSurf].
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<div style="clear:both"></div>
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'''THE 2.0 ANGSTROMS RESOLUTION STRUCTURE OF ESCHERICHIA COLI HISTIDINE-CONTAINING PHOSPHOCARRIER PROTEIN HPR: A REDETERMINATION'''
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==See Also==
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*[[Phosphocarrier protein HPr 3D structures|Phosphocarrier protein HPr 3D structures]]
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__TOC__
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==Overview==
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</StructureSection>
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The x-ray structure of Escherichia coli HPr has been redetermined at 2.0-A resolution. In contrast to the previous study (El-Kabbani, O. A. L., Waygood, E. B., and Delbaere, L. T. J. (1987) J. Biol. Chem. 262, 12926-12929), the overall structure is, in general, similar to other reported NMR and x-ray HPr structures, although there are some important differences in detail. The overall folding topology of HPr is a classical open-faced beta-sandwich, consisting of four antiparallel beta-strands and three alpha-helices. The least square refinement produced an R index of 0.135 for all measured unique data between 8.0 and 2.0 A resolution. The active center consists of His15 which is hydrogen bonded to a sulfate anion, and Arg17 which has a fully open conformation. This corresponds to the first observed "semi-closed" conformation of the active center of HPr. The Streptococcus faecalis HPr structure (Jia, Z., Vandonselaar, M., Quail, J. W., and Delbaere, L. T. J. (1993) Nature 361, 94-97) has the "open" conformation in which the side chains of His15 and Arg17 are directed as far away from each other as possible. The Bacillus subtilis HPr (Herzberg, O., Reddy, P., Sutrina, S., Saier, M. H., Jr., Reizer, J., and Kapadia, G. (1992) Proc. Natl. Acad. Sci. U.S.A. 89, 2499-2503) has the "closed" conformation in which the side chains of His15 and Arg17 are close together with a sulfate anion located in the active center. The open conformation represents the unphosphorylated form of HPr whereas the closed conformation likely resembles the phosphorylated form of HPr. The semi-closed conformation observed in the E. coli HPr structure could represent a structural intermediate on the phosphorylation/dephosphorylation pathway of HPr.
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==About this Structure==
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1POH 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=1POH OCA].
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==Reference==
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The 2.0-A resolution structure of Escherichia coli histidine-containing phosphocarrier protein HPr. A redetermination., Jia Z, Quail JW, Waygood EB, Delbaere LT, J Biol Chem. 1993 Oct 25;268(30):22490-501. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/8226757 8226757]
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[[Category: Escherichia coli]]
[[Category: Escherichia coli]]
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[[Category: Single protein]]
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[[Category: Large Structures]]
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[[Category: Delbaere, L.]]
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[[Category: Delbaere L]]
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[[Category: Jia, Z.]]
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[[Category: Jia Z]]
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[[Category: Quail, W.]]
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[[Category: Quail W]]
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[[Category: Phosphotransferase]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 05:18:32 2008''
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Current revision

THE 2.0 ANGSTROMS RESOLUTION STRUCTURE OF ESCHERICHIA COLI HISTIDINE-CONTAINING PHOSPHOCARRIER PROTEIN HPR: A REDETERMINATION

PDB ID 1poh

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