1b9u: Difference between revisions

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[[Image:1b9u.png|left|200px]]


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==MEMBRANE DOMAIN OF THE SUBUNIT B OF THE E.COLI ATP SYNTHASE==
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<StructureSection load='1b9u' size='340' side='right'caption='[[1b9u]]' scene=''>
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== Structural highlights ==
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<table><tr><td colspan='2'>[[1b9u]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Escherichia_coli_K-12 Escherichia coli K-12]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1B9U OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1B9U FirstGlance]. <br>
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</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Solution NMR</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=GMA:4-AMIDO-4-CARBAMOYL-BUTYRIC+ACID'>GMA</scene></td></tr>
{{STRUCTURE_1b9u|  PDB=1b9u  |  SCENE=  }}
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1b9u FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1b9u OCA], [https://pdbe.org/1b9u PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1b9u RCSB], [https://www.ebi.ac.uk/pdbsum/1b9u PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1b9u ProSAT]</span></td></tr>
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== Function ==
[https://www.uniprot.org/uniprot/ATPF_ECOLI ATPF_ECOLI] F(1)F(0) ATP synthase produces ATP from ADP in the presence of a proton or sodium gradient. F-type ATPases consist of two structural domains, F(1) containing the extramembraneous catalytic core and F(0) containing the membrane proton channel, linked together by a central stalk and a peripheral stalk. During catalysis, ATP synthesis in the catalytic domain of F(1) is coupled via a rotary mechanism of the central stalk subunits to proton translocation (By similarity).<ref>PMID:1682301</ref>  Component of the F(0) channel, it forms part of the peripheral stalk, linking F(1) to F(0) (By similarity).<ref>PMID:1682301</ref>
== Evolutionary Conservation ==
[[Image:Consurf_key_small.gif|200px|right]]
Check<jmol>
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    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/b9/1b9u_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=1b9u ConSurf].
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== Publication Abstract from PubMed ==
The structure of the N-terminal transmembrane domain (residues 1-34) of subunit b of the Escherichia coli F0F1-ATP synthase has been solved by two-dimensional 1H NMR in a membrane mimetic solvent mixture of chloroform/methanol/H2O (4:4:1). Residues 4-22 form an alpha-helix, which is likely to span the hydrophobic domain of the lipid bilayer to anchor the largely hydrophilic subunit b in the membrane. The helical structure is interrupted by a rigid bend in the region of residues 23-26 with alpha-helical structure resuming at Pro-27 at an angle offset by 20 degrees from the transmembrane helix. In native subunit b, the hinge region and C-terminal alpha-helical segment would connect the transmembrane helix to the cytoplasmic domain. The transmembrane domains of the two subunit b in F0 were shown to be close to each other by cross-linking experiments in which single Cys were substituted for residues 2-21 of the native subunit and b-b dimer formation tested after oxidation with Cu(II)(phenanthroline)2. Cys residues that formed disulfide cross-links were found with a periodicity indicative of one face of an alpha-helix, over the span of residues 2-18, where Cys at positions 2, 6, and 10 formed dimers in highest yield. A model for the dimer is presented based upon the NMR structure and distance constraints from the cross-linking data. The transmembrane alpha-helices are positioned at a 23 degrees angle to each other with the side chains of Thr-6, Gln-10, Phe-14, and Phe-17 at the interface between subunits. The change in direction of helical packing at the hinge region may be important in the functional interaction of the cytoplasmic domains.


===MEMBRANE DOMAIN OF THE SUBUNIT B OF THE E.COLI ATP SYNTHASE===
Structure of the membrane domain of subunit b of the Escherichia coli F0F1 ATP synthase.,Dmitriev O, Jones PC, Jiang W, Fillingame RH J Biol Chem. 1999 May 28;274(22):15598-604. PMID:10336456<ref>PMID:10336456</ref>


From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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==See Also==
The line below this paragraph, {{ABSTRACT_PUBMED_10336456}}, adds the Publication Abstract to the page
*[[ATPase 3D structures|ATPase 3D structures]]
(as it appears on PubMed at http://www.pubmed.gov), where 10336456 is the PubMed ID number.
== References ==
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<references/>
{{ABSTRACT_PUBMED_10336456}}
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</StructureSection>
==About this Structure==
[[Category: Escherichia coli K-12]]
1B9U is a 1 chain structure. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1B9U OCA].
[[Category: Large Structures]]
 
[[Category: Dmitriev O]]
==Reference==
[[Category: Fillingame RH]]
<ref group="xtra">PMID:10336456</ref><references group="xtra"/>
[[Category: Jiang W]]
[[Category: Dmitriev, O.]]
[[Category: Jones PC]]
[[Category: Fillingame, R H.]]
[[Category: Jiang, W.]]
[[Category: Jones, P C.]]
[[Category: Atp synthase]]
[[Category: Membrane protein]]
 
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