<?xml version="1.0" encoding="UTF-8"?>
<emd xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="https://github.com/emdb-empiar/emdb-schemas/blob/master/v3/v3_0_1_9/emdb.xsd" emdb_id="EMD-4260" version="3.0.1.9">
    <admin>
        <current_status>
            <date>2020-07-29</date>
            <code>REL</code>
            <processing_site>PDBe</processing_site>
        </current_status>
        <sites>
            <deposition>PDBe</deposition>
            <last_processing>PDBe</last_processing>
        </sites>
        <key_dates>
            <deposition>2018-01-15</deposition>
            <header_release>2018-01-24</header_release>
            <map_release>2018-01-31</map_release>
            <update>2020-07-29</update>
        </key_dates>
        <title>Volta phase plate data collection facilitates image processing and cryo-EM structure determination</title>
        <authors_list>
            <author>von Loeffelholz O</author>
            <author>Klaholz BP</author>
            <author>Natchiar SK</author>
        </authors_list>
    </admin>
    <crossreferences>
        <citation_list>
            <primary_citation>
                <journal_citation published="true">
                    <author order="1">von Loeffelholz O</author>
                    <author order="2">Papai G</author>
                    <author order="3">Danev R</author>
                    <author order="4">Myasnikov AG</author>
                    <author order="5">Natchiar SK</author>
                    <author order="6">Hazemann I</author>
                    <author order="7">Menetret JF</author>
                    <author order="8">Klaholz BP</author>
                    <title>Volta phase plate data collection facilitates image processing and cryo-EM structure determination.</title>
                    <journal_abbreviation>J. Struct. Biol.</journal_abbreviation>
                    <country>US</country>
                    <year>2018</year>
                    <external_references type="PUBMED">29337113</external_references>
                    <external_references type="DOI">doi:10.1016/j.jsb.2018.01.003</external_references>
                    <external_references type="ISSN">1095-8657</external_references>
                    <external_references type="CSD">0803</external_references>
                    <external_references type="ASTM">JSBIEM</external_references>
                </journal_citation>
            </primary_citation>
        </citation_list>
        <emdb_list>
            <emdb_reference>
                <emdb_id>EMD-4260</emdb_id>
                <relationship>
                    <other>associated EM volume</other>
                </relationship>
            </emdb_reference>
        </emdb_list>
    </crossreferences>
    <sample>
        <name>ribosome</name>
        <supramolecule_list>
            <complex_supramolecule supramolecule_id="1">
                <name>ribosome</name>
                <parent>0</parent>
                <natural_source database="NCBI">
                    <organism ncbi="9606">Homo sapiens</organism>
                    <strain>HeLa</strain>
                </natural_source>
            </complex_supramolecule>
        </supramolecule_list>
    </sample>
    <structure_determination_list>
        <structure_determination structure_determination_id="1">
            <method>singleParticle</method>
            <aggregation_state>particle</aggregation_state>
            <specimen_preparation_list>
                <single_particle_preparation preparation_id="1">
                    <buffer>
                        <ph>7.6</ph>
                    </buffer>
                    <vitrification>
                        <cryogen_name>ETHANE</cryogen_name>
                        <details></details>
                    </vitrification>
                </single_particle_preparation>
            </specimen_preparation_list>
            <microscopy_list>
                <single_particle_microscopy microscopy_id="1">
                    <microscope>FEI TITAN</microscope>
                    <illumination_mode>FLOOD BEAM</illumination_mode>
                    <imaging_mode>BRIGHT FIELD</imaging_mode>
                    <electron_source>FIELD EMISSION GUN</electron_source>
                    <acceleration_voltage units="kV">300</acceleration_voltage>
                    <nominal_cs units="mm">0.01</nominal_cs>
                    <nominal_defocus_min units="µm">0.05</nominal_defocus_min>
                    <nominal_defocus_max units="µm">0.05</nominal_defocus_max>
                    <nominal_magnification>45871.0</nominal_magnification>
                    <calibrated_magnification>45871.0</calibrated_magnification>
                    <specimen_holder_model>FEI TITAN KRIOS AUTOGRID HOLDER</specimen_holder_model>
                    <cooling_holder_cryogen>NITROGEN</cooling_holder_cryogen>
                    <specialist_optics>
                        <phase_plate>VOLTA PHASE PLATE</phase_plate>
                        <sph_aberration_corrector>CS corrector used, opening up to 13 mrad at 26 mrad tilt</sph_aberration_corrector>
                        <energy_filter>
                            <name>GIF Quantum LS</name>
                        </energy_filter>
                    </specialist_optics>
                    <image_recording_list>
                        <image_recording image_recording_id="1">
                            <film_or_detector_model>GATAN K2 SUMMIT (4k x 4k)</film_or_detector_model>
                            <detector_mode>SUPER-RESOLUTION</detector_mode>
                            <digitization_details>
                                <dimensions>
                                    <width units="pixel">7420</width>
                                    <height units="pixel">7676</height>
                                </dimensions>
                                <sampling_interval units="µm">5.0</sampling_interval>
                                <frames_per_image>1-29</frames_per_image>
                            </digitization_details>
                            <number_grids_imaged>1</number_grids_imaged>
                            <number_real_images>433</number_real_images>
                            <average_exposure_time units="s">4.5</average_exposure_time>
                            <average_electron_dose_per_image units="e/Å^2">1.03</average_electron_dose_per_image>
                        </image_recording>
                    </image_recording_list>
                </single_particle_microscopy>
            </microscopy_list>
            <singleparticle_processing image_processing_id="1">
                <image_recording_id>1</image_recording_id>
                <startup_model type_of_model="OTHER">
                    <details>e2initialmodel.py output from 2D classes calculated with Relion</details>
                </startup_model>
                <final_reconstruction>
                    <resolution units="Å" res_type="BY AUTHOR">4.4</resolution>
                    <resolution_method>FSC 0.143 CUT-OFF</resolution_method>
                    <number_images_used>15266</number_images_used>
                </final_reconstruction>
                <initial_angle_assignment>
                    <type>ANGULAR RECONSTITUTION</type>
                </initial_angle_assignment>
                <final_angle_assignment>
                    <type>ANGULAR RECONSTITUTION</type>
                </final_angle_assignment>
            </singleparticle_processing>
        </structure_determination>
    </structure_determination_list>
    <map format="CCP4" size_kbytes="296353">
        <file>emd_4260.map.gz</file>
        <symmetry>
            <space_group>1</space_group>
        </symmetry>
        <data_type>IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)</data_type>
        <dimensions>
            <col>420</col>
            <row>420</row>
            <sec>420</sec>
        </dimensions>
        <origin>
            <col>0</col>
            <row>0</row>
            <sec>0</sec>
        </origin>
        <spacing>
            <x>420</x>
            <y>420</y>
            <z>420</z>
        </spacing>
        <cell>
            <a units="Å">457.80002</a>
            <b units="Å">457.80002</b>
            <c units="Å">457.80002</c>
            <alpha units="deg">90.0</alpha>
            <beta units="deg">90.0</beta>
            <gamma units="deg">90.0</gamma>
        </cell>
        <axis_order>
            <fast>X</fast>
            <medium>Y</medium>
            <slow>Z</slow>
        </axis_order>
        <statistics>
            <minimum>-0.04798841</minimum>
            <maximum>0.07673174</maximum>
            <average>0.00024926406</average>
            <std>0.005738395</std>
        </statistics>
        <pixel_spacing>
            <x units="Å">1.09</x>
            <y units="Å">1.09</y>
            <z units="Å">1.09</z>
        </pixel_spacing>
        <contour_list>
            <contour primary="true">
                <level>0.0218</level>
                <source>AUTHOR</source>
            </contour>
        </contour_list>
        <label>::::EMDATABANK.org::::EMD-4260::::</label>
        <annotation_details>human 80S ribosome reconstructed from close to focus VPP data, postprocessed map.</annotation_details>
    </map>
</emd>
