2ffx

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[[Image:2ffx.gif|left|200px]]<br /><applet load="2ffx" size="350" color="white" frame="true" align="right" spinBox="true"
 
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caption="2ffx, resolution 1.90&Aring;" />
 
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'''Structure of Human Ferritin L. Chain'''<br />
 
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==Overview==
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==Structure of Human Ferritin L. Chain==
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Ferritin is the major iron-storage protein present in all cells. It generally contains 24 subunits, with different ratios of heavy chain (H) to light chain (L), in the shape of a hollow sphere hosting up to 4500 ferric Fe atoms inside. H-rich ferritins catalyse the oxidation of iron(II), while L-rich ferritins promote the nucleation and storage of iron(III). Several X-ray structures have been determined, including those of L-chain ferritins from horse spleen (HoSF), recombinant L-chain ferritins from horse (HoLF), mouse (MoLF) and bullfrog (BfLF) as well as recombinant human H-chain ferritin (HuHF). Here, structures have been determined of two crystal forms of recombinant human L-chain ferritin (HuLF) obtained from native and perdeuterated proteins. The structures show a cluster of acidic residues at the ferrihydrite nucleation site and at the iron channel along the threefold axis. An ordered Cd2+ structure is observed within the iron channel, offering further insight into the route and mechanism of iron transport into the capsid. The loop between helices D and E, which is disordered in many other L-chain structures, is clearly visible in these two structures. The crystals generated from perdeuterated HuLF will be used for neutron diffraction studies.
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<StructureSection load='2ffx' size='340' side='right'caption='[[2ffx]], [[Resolution|resolution]] 1.90&Aring;' scene=''>
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== Structural highlights ==
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<table><tr><td colspan='2'>[[2ffx]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2FFX OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2FFX 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">X-ray diffraction, [[Resolution|Resolution]] 1.9&#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=CD:CADMIUM+ION'>CD</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr>
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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=2ffx FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2ffx OCA], [https://pdbe.org/2ffx PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2ffx RCSB], [https://www.ebi.ac.uk/pdbsum/2ffx PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2ffx ProSAT]</span></td></tr>
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</table>
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== Disease ==
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[https://www.uniprot.org/uniprot/FRIL_HUMAN FRIL_HUMAN] Defects in FTL are the cause of hereditary hyperferritinemia-cataract syndrome (HHCS) [MIM:[https://omim.org/entry/600886 600886]. It is an autosomal dominant disease characterized by early-onset bilateral cataract. Affected patients have elevated level of circulating ferritin. HHCS is caused by mutations in the iron responsive element (IRE) of the FTL gene.<ref>PMID:20159981</ref> Defects in FTL are the cause of neurodegeneration with brain iron accumulation type 3 (NBIA3) [MIM:[https://omim.org/entry/606159 606159]; also known as adult-onset basal ganglia disease. It is a movement disorder with heterogeneous presentations starting in the fourth to sixth decade. It is characterized by a variety of neurological signs including parkinsonism, ataxia, corticospinal signs, mild nonprogressive cognitive deficit and episodic psychosis. It is linked with decreased serum ferritin levels.<ref>PMID:20159981</ref> <ref>PMID:16116125</ref>
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== Function ==
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[https://www.uniprot.org/uniprot/FRIL_HUMAN FRIL_HUMAN] Stores iron in a soluble, non-toxic, readily available form. Important for iron homeostasis. Iron is taken up in the ferrous form and deposited as ferric hydroxides after oxidation. Also plays a role in delivery of iron to cells. Mediates iron uptake in capsule cells of the developing kidney (By similarity).<ref>PMID:19923220</ref> <ref>PMID:20159981</ref>
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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/ff/2ffx_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=2ffx ConSurf].
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<div style="clear:both"></div>
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==Disease==
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==See Also==
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Known diseases associated with this structure: Basal ganglia disease, adult-onset OMIM:[[http://www.ncbi.nlm.nih.gov/entrez/dispomim.cgi?id=134790 134790]], Hyperferritinemia-cataract syndrome OMIM:[[http://www.ncbi.nlm.nih.gov/entrez/dispomim.cgi?id=134790 134790]]
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*[[Ferritin 3D structures|Ferritin 3D structures]]
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== References ==
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==About this Structure==
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<references/>
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2FFX is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens] with <scene name='pdbligand=CD:'>CD</scene> and <scene name='pdbligand=SO4:'>SO4</scene> as [http://en.wikipedia.org/wiki/ligands ligands]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2FFX OCA].
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__TOC__
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</StructureSection>
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==Reference==
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Structure of human ferritin L chain., Wang Z, Li C, Ellenburg M, Soistman E, Ruble J, Wright B, Ho JX, Carter DC, Acta Crystallogr D Biol Crystallogr. 2006 Jul;62(Pt 7):800-6. Epub 2006, Jun 20. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=16790936 16790936]
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[[Category: Homo sapiens]]
[[Category: Homo sapiens]]
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[[Category: Single protein]]
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[[Category: Large Structures]]
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[[Category: Carter, D C.]]
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[[Category: Carter DC]]
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[[Category: Ellenburg, M P.]]
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[[Category: Ellenburg MP]]
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[[Category: Ho, J X.]]
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[[Category: Ho JX]]
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[[Category: Li, C.]]
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[[Category: Li C]]
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[[Category: Ruble, J R.]]
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[[Category: Ruble JR]]
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[[Category: Soitsman, E M.]]
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[[Category: Soitsman EM]]
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[[Category: Wang, Z M.]]
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[[Category: Wang ZM]]
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[[Category: Wright, B S.]]
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[[Category: Wright BS]]
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[[Category: CD]]
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[[Category: SO4]]
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[[Category: human ferritin light chain perdeuterated capsid]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 17:20:58 2008''
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Current revision

Structure of Human Ferritin L. Chain

PDB ID 2ffx

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