View source for 7xz4


==Crystal structure of ferritin from Setaria italica==
<StructureSection load='7xz4' size='340' side='right'caption='[[7xz4]], [[Resolution|resolution]] 2.20&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[7xz4]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Setaria_italica Setaria italica]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=7XZ4 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=7XZ4 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]] 2.2&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=FE:FE+(III)+ION'>FE</scene>, <scene name='pdbligand=PO4:PHOSPHATE+ION'>PO4</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=7xz4 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=7xz4 OCA], [https://pdbe.org/7xz4 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=7xz4 RCSB], [https://www.ebi.ac.uk/pdbsum/7xz4 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=7xz4 ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/K3ZJM0_SETIT K3ZJM0_SETIT] Stores iron in a soluble, non-toxic, readily available form. Important for iron homeostasis. Has ferroxidase activity. Iron is taken up in the ferrous form and deposited as ferric hydroxides after oxidation.[ARBA:ARBA00025111]  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.[RuleBase:RU361145]
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== Publication Abstract from PubMed ==
The extension peptide (EP) is the most distinctive feature of mature plant ferritin. Some EPs have exhibited serine-like protease activity, which is associated with iron uptake and release. EP forms a helix and a long loop, followed by a conserved core helical bundle. However, whether the EP adopts a stable or uniform folding pattern in all plants remains unclear. To clarify this, we investigated the crystal structure of ferritin-1 from Setaria italica (SiFer1), a type of monocotyledon. In our structure of SiFer1, the EP is different from other EPs in other solved structures of plant ferritins and consisted of a pair of beta-sheets, a shorter helix, and two loops, which masks two hydrophobic pockets on the outer surface of every subunit. Furthermore, sequence analysis and structure comparison suggest that the EPs in ferritins from monocotyledons may adopt a novel fold pattern, and the conformations of EPs in ferritins are alterable among different plant species. Furthermore, additional eight iron atoms were first founded binding in the fourfold channels, demonstrating the vital function of fourfold channels in iron diffusion. In all, our structure provides new clues for understanding plant ferritins and the functions of the EP.

Extension Peptide of Plant Ferritin from Setaria italica Presents a Novel Fold.,Wang W, Wang Y, Xi H, Song Z, Zhang W, Xie L, Ma D, Qin N, Wang H J Agric Food Chem. 2023 Jan 11;71(1):934-943. doi: 10.1021/acs.jafc.2c07595. Epub , 2022 Dec 28. PMID:36576327<ref>PMID:36576327</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 7xz4" style="background-color:#fffaf0;"></div>

==See Also==
*[[Ferritin 3D structures|Ferritin 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Setaria italica]]
[[Category: Wang HF]]
[[Category: Wang WM]]
[[Category: Wang Y]]