6ipc

From Proteopedia

Non-native human ferritin 8-mer

PDB ID 6ipc

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Structural highlights

6ipc is a 16 chain structure with sequence from Homo sapiens. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:	X-ray diffraction, Resolution 4.443Å
Ligands:
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

FRIH_HUMAN 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. Also plays a role in delivery of iron to cells. Mediates iron uptake in capsule cells of the developing kidney (By similarity).

Publication Abstract from PubMed

Constructing different protein nanostructures with high-order discrete architectures by using one single building block remains a challenge. Here, we present a simple, effective disulfide-mediated approach to prepare a set of protein nanocages with different geometries from single building block. By genetically deleting an inherent intra-subunit disulfide bond, we can render the conversion of an 8-mer bowl-like protein architecture (NF-8) into a 24-mer ferritin-like nanocage in solution, while selective insertion of an inter-subunit disulfide bond into NF-8 triggers its conversion into a 16-mer lenticular nanocage. Deletion of the same intra-subunit disulfide bond and insertion of the inter-subunit disulfide bond results in the conversion of NF-8 into a 48-mer protein nanocage in solution. Thus, in the laboratory, simple mutation of one protein building block can generate three different protein nanocages in a manner that is highly reminiscent of natural pentamer building block originating from viral capsids that self-assemble into protein assemblies with different symmetries.

Disulfide-mediated conversion of 8-mer bowl-like protein architecture into three different nanocages.,Zang J, Chen H, Zhang X, Zhang C, Guo J, Du M, Zhao G Nat Commun. 2019 Feb 15;10(1):778. doi: 10.1038/s41467-019-08788-9. PMID:30770832^[1]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Zang J, Chen H, Zhang X, Zhang C, Guo J, Du M, Zhao G. Disulfide-mediated conversion of 8-mer bowl-like protein architecture into three different nanocages. Nat Commun. 2019 Feb 15;10(1):778. doi: 10.1038/s41467-019-08788-9. PMID:30770832 doi:http://dx.doi.org/10.1038/s41467-019-08788-9