View source for 9bq5


==C-terminus truncated (last two residues) mutant of Human light chain ferritin reacted with iron (3 Fe2+ to ferritin monomer ratio). Reconstruction of particles with no nanoparticle.==
<StructureSection load='9bq5' size='340' side='right'caption='[[9bq5]], [[Resolution|resolution]] 2.36&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[9bq5]] is a 24 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=9BQ5 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=9BQ5 FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Electron Microscopy, [[Resolution|Resolution]] 2.36&#8491;</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=9bq5 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=9bq5 OCA], [https://pdbe.org/9bq5 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=9bq5 RCSB], [https://www.ebi.ac.uk/pdbsum/9bq5 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=9bq5 ProSAT]</span></td></tr>
</table>
== Disease ==
[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> 
== Function ==
[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> 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Visualizing the structure of the protein-inorganic interface is critically important for a more complete understanding of biomineralization. Unfortunately, there are limited approaches for the direct and detailed study of biomolecules that interact with inorganic materials. Here, we use single-particle cryo-electron microscopy (cryo-EM) to study the protein-nanoparticle (NP) interactions of human light chain ferritin and visualize the high-resolution details of the protein-inorganic interface. In this work, we determined the 2.85 A structure of human light chain ferritin bound to its native iron oxide NP substrate. The resulting cryo-EM maps confirmed and enhanced previously proposed interactions of the protein with the material along the B-helix and revealed new interaction at the C-terminus of light chain ferritin. This work sheds new light on the mechanisms of ferritin biomineralization and further demonstrates the application of cryo-EM for the study of protein-inorganic systems.

Observation of the Protein-Inorganic Interface of Ferritin by Cryo-Electron Microscopy.,Sen S, Thaker A, Haymaker A, Williams D, Chiu PL, Nannenga BL J Am Chem Soc. 2025 Jan 29;147(4):3333-3340. doi: 10.1021/jacs.4c13873. Epub 2025 , Jan 15. PMID:39815632<ref>PMID:39815632</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 9bq5" style="background-color:#fffaf0;"></div>
== References ==
<references/>
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</StructureSection>
[[Category: Homo sapiens]]
[[Category: Large Structures]]
[[Category: Nannenga BL]]
[[Category: Sen S]]
[[Category: Williams D]]