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- PDB-5xb1: human ferritin mutant - E-helix deletion -

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Basic information

Entry
Database: PDB / ID: 5xb1
Titlehuman ferritin mutant - E-helix deletion
ComponentsFerritin heavy chain
KeywordsTRANSPORT PROTEIN / ferritin / cage / drug delivery
Function / homology
Function and homology information


iron ion sequestering activity / Scavenging by Class A Receptors / intracellular ferritin complex / autolysosome / Golgi Associated Vesicle Biogenesis / ferroxidase / intracellular sequestering of iron ion / ferroxidase activity / negative regulation of fibroblast proliferation / ferric iron binding ...iron ion sequestering activity / Scavenging by Class A Receptors / intracellular ferritin complex / autolysosome / Golgi Associated Vesicle Biogenesis / ferroxidase / intracellular sequestering of iron ion / ferroxidase activity / negative regulation of fibroblast proliferation / ferric iron binding / ferrous iron binding / Iron uptake and transport / tertiary granule lumen / iron ion transport / intracellular iron ion homeostasis / ficolin-1-rich granule lumen / immune response / iron ion binding / negative regulation of cell population proliferation / Neutrophil degranulation / extracellular exosome / extracellular region / identical protein binding / nucleus / cytosol / cytoplasm
Similarity search - Function
Ferritin iron-binding regions signature 1. / Ferritin iron-binding regions signature 2. / Ferritin, conserved site / Ferritin, core subunit, four-helix bundle / Ferritin / Ferritin / Ferritin-like diiron domain / Ferritin-like diiron domain profile. / Ferritin/DPS protein domain / Ferritin-like domain ...Ferritin iron-binding regions signature 1. / Ferritin iron-binding regions signature 2. / Ferritin, conserved site / Ferritin, core subunit, four-helix bundle / Ferritin / Ferritin / Ferritin-like diiron domain / Ferritin-like diiron domain profile. / Ferritin/DPS protein domain / Ferritin-like domain / Ferritin-like / Ferritin-like superfamily / Up-down Bundle / Mainly Alpha
Similarity search - Domain/homology
Ferritin heavy chain
Similarity search - Component
Biological speciesHomo sapiens (human)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3 Å
AuthorsLee, S.G. / Ahn, B.J. / Jeong, H. / Kim, H. / Hyun, J. / Jung, Y.
Funding support Korea, Republic Of, 1items
OrganizationGrant numberCountry
Korea, Republic Of
CitationJournal: Angew Chem Int Ed Engl / Year: 2018
Title: Four-fold Channel-Nicked Human Ferritin Nanocages for Active Drug Loading and pH-Responsive Drug Release.
Authors: Byungjun Ahn / Seong-Gyu Lee / Hye Ryeon Yoon / Jeong Min Lee / Hyeok Jin Oh / Ho Min Kim / Yongwon Jung /
Abstract: Human ferritins are emerging platforms for non-toxic protein-based drug delivery, owing to their intrinsic or acquirable targeting abilities to cancer cells and hollow cage structures for drug ...Human ferritins are emerging platforms for non-toxic protein-based drug delivery, owing to their intrinsic or acquirable targeting abilities to cancer cells and hollow cage structures for drug loading. However, reliable strategies for high-level drug encapsulation within ferritin cavities and prompt cellular drug release are still lacking. Ferritin nanocages were developed with partially opened hydrophobic channels, which provide stable routes for spontaneous and highly accumulated loading of Fe -conjugated drugs as well as pH-responsive rapid drug release at endoplasmic pH. Multiple cancer-related compounds, such as doxorubicin, curcumin, and quercetin, were actively and heavily loaded onto the prepared nicked ferritin. Drugs on these minimally modified ferritins were effectively delivered inside cancer cells with high toxicity.
History
DepositionMar 15, 2017Deposition site: PDBJ / Processing site: PDBJ
Revision 1.0Feb 21, 2018Provider: repository / Type: Initial release
Revision 1.1Mar 14, 2018Group: Database references / Category: citation
Item: _citation.journal_volume / _citation.page_first / _citation.page_last
Revision 1.2Nov 6, 2019Group: Data collection / Other / Category: cell / Item: _cell.Z_PDB
Revision 1.3Mar 27, 2024Group: Data collection / Database references / Refinement description
Category: chem_comp_atom / chem_comp_bond ...chem_comp_atom / chem_comp_bond / database_2 / em_3d_fitting_list / pdbx_initial_refinement_model
Item: _database_2.pdbx_DOI / _database_2.pdbx_database_accession ..._database_2.pdbx_DOI / _database_2.pdbx_database_accession / _em_3d_fitting_list.accession_code / _em_3d_fitting_list.initial_refinement_model_id / _em_3d_fitting_list.source_name / _em_3d_fitting_list.type

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Structure visualization

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  • Deposited structure unit
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Assembly

Deposited unit
A: Ferritin heavy chain
B: Ferritin heavy chain
C: Ferritin heavy chain
D: Ferritin heavy chain
E: Ferritin heavy chain
F: Ferritin heavy chain
G: Ferritin heavy chain
H: Ferritin heavy chain
I: Ferritin heavy chain
J: Ferritin heavy chain
K: Ferritin heavy chain
L: Ferritin heavy chain
M: Ferritin heavy chain
N: Ferritin heavy chain
O: Ferritin heavy chain
P: Ferritin heavy chain
Q: Ferritin heavy chain
R: Ferritin heavy chain
S: Ferritin heavy chain
T: Ferritin heavy chain
U: Ferritin heavy chain
V: Ferritin heavy chain
W: Ferritin heavy chain
X: Ferritin heavy chain


Theoretical massNumber of molelcules
Total (without water)450,62624
Polymers450,62624
Non-polymers00
Water99155
1


  • Idetical with deposited unit
  • defined by author
TypeNameSymmetry operationNumber
identity operation1_5551
Buried area71980 Å2
ΔGint-143 kcal/mol
Surface area163770 Å2

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Components

#1: Protein ...
Ferritin heavy chain / / Ferritin H subunit / Cell proliferation-inducing gene 15 protein


Mass: 18776.082 Da / Num. of mol.: 24 / Fragment: UNP residues 6-160
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: FTH1, FTH, FTHL6, OK/SW-cl.84, PIG15 / Production host: Escherichia coli (E. coli) / References: UniProt: P02794, ferroxidase
#2: Water ChemComp-HOH / water / Water


Mass: 18.015 Da / Num. of mol.: 55 / Source method: isolated from a natural source / Formula: H2O

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Experimental details

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Experiment

ExperimentMethod: ELECTRON MICROSCOPY
EM experimentAggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction

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Sample preparation

ComponentName: human ferritin E-helix deletion mutant / Type: COMPLEX / Entity ID: #1 / Source: RECOMBINANT
Molecular weightValue: 0.42 MDa / Experimental value: NO
Source (natural)Organism: Homo sapiens (human)
Source (recombinant)Organism: Escherichia coli (E. coli)
Buffer solutionpH: 8 / Details: buffers were titrated with HCl to pH8.0
Buffer component
IDConc.NameFormulaBuffer-ID
1200 mMsodium chlorideNaClSodium chloride1
220 mMtris(hydroxymethyl)aminomethaneTris1
SpecimenConc.: 0.1 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
Specimen supportDetails: the grid was coated with graphene oxide prior to use
Grid material: COPPER / Grid mesh size: 400 divisions/in. / Grid type: Quantifoil R1.2/1.3
VitrificationInstrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 276 K / Details: blot for 9 seconds before plunging

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: FEI TITAN KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELDBright-field microscopy / Nominal magnification: 47000 X / Cs: 0.002 mm
Specimen holderCryogen: NITROGEN / Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER
Image recordingAverage exposure time: 1.8 sec. / Electron dose: 2 e/Å2 / Film or detector model: FEI FALCON II (4k x 4k)
Image scansMovie frames/image: 30 / Used frames/image: 2-29

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Processing

EM software
IDNameVersionCategory
2RELION2image acquisition
4CTFFIND4CTF correction
7chimera1.10.2model fitting
9PHENIX1.10.1model refinement
10RELION2initial Euler assignment
11RELION2final Euler assignment
12RELION2classification
13RELION23D reconstruction
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
Particle selectionNum. of particles selected: 623510
SymmetryPoint symmetry: O (octahedral)
3D reconstructionResolution: 3 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 429135 / Details: relion2.0 program was used for the reconstruction / Symmetry type: POINT
Atomic model buildingB value: 29.56 / Protocol: FLEXIBLE FIT / Space: REAL
Atomic model buildingPDB-ID: 4Y08

4y08


Pdb chain-ID: A / Accession code: 4Y08 / Pdb chain residue range: 5-160 / Source name: PDB / Type: experimental model

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