View source for 2fcp


==FERRIC HYDROXAMATE UPTAKE RECEPTOR (FHUA) FROM E.COLI==
<StructureSection load='2fcp' size='340' side='right'caption='[[2fcp]], [[Resolution|resolution]] 2.50&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[2fcp]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Escherichia_coli_K-12 Escherichia coli K-12]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2FCP OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2FCP FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.5&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=AAE:ACETOACETIC+ACID'>AAE</scene>, <scene name='pdbligand=EA2:AMINOETHANOLPYROPHOSPHATE'>EA2</scene>, <scene name='pdbligand=GLA:ALPHA+D-GALACTOSE'>GLA</scene>, <scene name='pdbligand=GLC:ALPHA-D-GLUCOSE'>GLC</scene>, <scene name='pdbligand=GMH:L-GLYCERO-D-MANNO-HEPTOPYRANOSE'>GMH</scene>, <scene name='pdbligand=GP1:GLUCOSAMINE+1-PHOSPHATE'>GP1</scene>, <scene name='pdbligand=GP4:GLUCOSAMINE+4-PHOSPHATE'>GP4</scene>, <scene name='pdbligand=GPH:4-O-PHOSPHONO-D-GLYCERO-BETA-D-MANNO-HEPTOPYRANOSE'>GPH</scene>, <scene name='pdbligand=KDO:3-DEOXY-D-MANNO-OCT-2-ULOSONIC+ACID'>KDO</scene>, <scene name='pdbligand=LIL:2-TRIDECANOYLOXY-PENTADECANOIC+ACID'>LIL</scene>, <scene name='pdbligand=LIM:3-OXO-PENTADECANOIC+ACID'>LIM</scene>, <scene name='pdbligand=NI:NICKEL+(II)+ION'>NI</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=2fcp FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2fcp OCA], [https://pdbe.org/2fcp PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2fcp RCSB], [https://www.ebi.ac.uk/pdbsum/2fcp PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2fcp ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/FHUA_ECOLI FHUA_ECOLI] This receptor binds the ferrichrome-iron ligand. It interacts with the TonB protein, which is responsible for energy coupling of the ferrichrome-promoted iron transport system. Acts as a receptor for bacteriophage T5 as well as T1, phi80 and colicin M. Binding of T5 triggers the opening of a high conductance ion channel. Can also transport the antibiotic albomycin.<ref>PMID:8617231</ref> 
== 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/fc/2fcp_consurf.spt"</scriptWhenChecked>
    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview03.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=2fcp ConSurf].
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== Publication Abstract from PubMed ==
FhuA, the receptor for ferrichrome-iron in Escherichia coli, is a member of a family of integral outer membrane proteins, which, together with the energy-transducing protein TonB, mediate the active transport of ferric siderophores across the outer membrane of Gram-negative bacteria. The three-dimensional structure of FhuA is presented here in two conformations: with and without ferrichrome-iron at resolutions of 2.7 and 2.5 angstroms, respectively. FhuA is a beta barrel composed of 22 antiparallel beta strands. In contrast to the typical trimeric arrangement found in porins, FhuA is monomeric. Located within the beta barrel is a structurally distinct domain, the "cork," which mainly consists of a four-stranded beta sheet and four short alpha helices. A single lipopolysaccharide molecule is noncovalently associated with the membrane-embedded region of the protein. Upon binding of ferrichrome-iron, conformational changes are transduced to the periplasmic pocket of FhuA, signaling the ligand-loaded status of the receptor. Sequence homologies and mutagenesis data are used to propose a structural mechanism for TonB-dependent siderophore-mediated transport across the outer membrane.

Siderophore-mediated iron transport: crystal structure of FhuA with bound lipopolysaccharide.,Ferguson AD, Hofmann E, Coulton JW, Diederichs K, Welte W Science. 1998 Dec 18;282(5397):2215-20. PMID:9856937<ref>PMID:9856937</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 2fcp" style="background-color:#fffaf0;"></div>

==See Also==
*[[Ferric hydroxamate uptake receptor|Ferric hydroxamate uptake receptor]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Escherichia coli K-12]]
[[Category: Large Structures]]
[[Category: Diederichs K]]
[[Category: Ferguson AD]]
[[Category: Hofmann E]]
[[Category: Welte W]]