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    - PDB-1suv: Structure of Human Transferrin Receptor-Transferrin Complex -

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    Basic information

    Entry
    Database: PDB / ID: 1suv
    TitleStructure of Human Transferrin Receptor-Transferrin Complex
    DescriptorTransferrin receptor protein 1
    Serotransferrin
    KeywordsMETAL TRANSPORT / Protein Complex
    Specimen sourceHomo sapiens / human
    MethodElectron microscopy (7.5 A resolution / Single particle / Vitreous ice (cryo EM))
    AuthorsCheng, Y. / Zak, O. / Aisen, P. / Harrison, S.C. / Walz, T.
    CitationCell, 2004, 116, 565-576

    Cell, 2004, 116, 565-576 StrPapers
    Structure of the human transferrin receptor-transferrin complex.
    Yifan Cheng / Olga Zak / Philip Aisen / Stephen C Harrison / Thomas Walz

    DateDeposition: Mar 26, 2004 / Release: Apr 13, 2004 / Last modification: Feb 24, 2009

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    Assembly

    Deposited unit
    A: Transferrin receptor protein 1
    B: Transferrin receptor protein 1
    C: Serotransferrin, N-lobe
    D: Serotransferrin, N-lobe
    E: Serotransferrin, C-lobe
    F: Serotransferrin, C-lobe
    hetero molecules

    293 kDa, 14 molecules
    Theoretical massNumber of molelcules
    Total
    (without water)
    293,13014
    Polyers292,6666
    Non-polymers4638
    Water0

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    #1idetical with deposited unit / defined by author / Symmetry operations: (identity)x1
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    Components

    #1polypeptide(L) / Transferrin receptor protein 1 / TfR1, TR, TfR, Trfr, CD71 antigen, T9, p90 / Source: Homo sapiens (gene. exp.) / References: UniProt: P02786
    #2polypeptide(L) / Serotransferrin, N-lobe / Transferrin, Siderophilin, Beta-1-metal binding globulin, PRO1400 / Fragment: repeat 1 / Source: Homo sapiens (gene. exp.) / References: UniProt: P02787
    #3polypeptide(L) / Serotransferrin, C-lobe / Transferrin, Siderophilin, Beta-1-metal binding globulin / Fragment: repeat 2 / Source: Homo sapiens (gene. exp.)
    #4ChemComp-CO3 / CARBONATE ION
    #5ChemComp-FE / FE (III) ION

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    Experimental details

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    Experiment

    ExperimentMethod: ELECTRON MICROSCOPY
    EM experimentReconstruction method: SINGLE PARTICLE / Specimen type: VITREOUS ICE (CRYO EM)

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    Sample preparation

    Assembly of specimenName: Human Transferrin Receptor - Transferrin Complex / Aggregation state: PARTICLE
    Sample preparationpH: 7.4

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    Electron microscopy imaging

    MicroscopyMicroscope model: FEI TECNAI F20 / Date: Oct 15, 2001
    Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 200 kV / Electron dose: 20 e/A2 / Illumination mode: FLOOD BEAM
    Electron lensMode: BRIGHT FIELD / Nominal magnification: 50000 X / Calibrated magnification: 51160 X / Nominal defocus max: 5000 nm / Nominal defocus min: 2500 nm / Cs: 2 mm
    Specimen holderTemperature: 93 K / Tilt angle max: 0 deg. / Tilt angle min: 0 deg.
    CameraType: KODAK SO163 FILM

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    Processing

    EM single particle entitySymmetry type: CYCLIC
    3D reconstructionMethod: Fourier Space reconstruction / Resolution: 7.5 A / Nominal pixel size: 2.8 A/pix / Actual pixel size: 2.74 A/pix / CTF correction method: CTF correction for each particle / Details: using program FREALIGN
    Atomic model buildingRef protocol: rigid body / Ref space: REAL
    Target criteria: visual fit using program O followed by rigid body refinement using program MAVE
    Number of atoms included #LASTProtein: 20552 / Nucleic acid: 0 / Ligand: 20 / Solvent: 0 / Total: 20572

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