<?xml version="1.0" encoding="UTF-8"?>
<emd emdb_id="EMD-3188" version="3.0.1.9">
    <admin>
        <status_history_list>
            <status status_id="1">
                <code>HPUB</code>
            </status>
        </status_history_list>
        <current_status>
            <code>OBS</code>
            <processing_site>PDBe</processing_site>
        </current_status>
        <sites>
            <deposition>PDBe</deposition>
            <last_processing>PDBe</last_processing>
        </sites>
        <key_dates>
            <deposition>2015-10-04</deposition>
            <header_release>2015-11-04</header_release>
            <obsolete>2016-03-09</obsolete>
            <update>2016-03-09</update>
        </key_dates>
        <title>Mechanisms of Ribosome Stalling by SecM at Multiple Elongation Steps</title>
        <authors_list>
            <author>Zhang J</author>
            <author>Pan XJ</author>
            <author>Yan KG</author>
            <author>Sun S</author>
            <author>Gao N</author>
            <author>Sui SF</author>
        </authors_list>
        <keywords>electron microscopy, single particle analysis, ribosome stalling</keywords>
    </admin>
    <crossreferences>
        <citation_list>
            <primary_citation>
                <journal_citation published="true">
                    <author order="1">Zhang J</author>
                    <author order="2">Pan X</author>
                    <author order="3">Yan K</author>
                    <author order="4">Sun S</author>
                    <author order="5">Gao N</author>
                    <author order="6">Sui SF</author>
                    <title>Mechanisms of ribosome stalling by SecM at multiple elongation steps.</title>
                    <journal>ELIFE</journal>
                    <volume>4</volume>
                    <year>2015</year>
                    <external_references type="PUBMED">26670735</external_references>
                    <external_references type="DOI">doi:10.7554/eLife.09684</external_references>
                </journal_citation>
            </primary_citation>
        </citation_list>
    </crossreferences>
    <sample>
        <name>SecM-Gly-RNC(ribosome-nascent-peptide-complex) complex with 50S mask</name>
        <supramolecule_list>
            <sample_supramolecule supramolecule_id="1000">
                <name>SecM-Gly-RNC(ribosome-nascent-peptide-complex) complex with 50S mask</name>
                <number_unique_components>1</number_unique_components>
                <molecular_weight>
                    <theoretical units="MDa">2.3</theoretical>
                </molecular_weight>
            </sample_supramolecule>
            <complex_supramolecule supramolecule_id="1">
                <name synonym="SecM-Gly-stalled RNC with 50S mask">SecM-Gly-RNC with 50S mask</name>
                <recombinant_exp_flag>true</recombinant_exp_flag>
                <natural_source database="NCBI">
                    <organism ncbi="562">Escherichia coli</organism>
                </natural_source>
                <recombinant_expression database="NCBI">
                    <recombinant_organism ncbi="511145">Escherichia coli str. K-12 substr. MG1655</recombinant_organism>
                    <recombinant_plasmid>pET21</recombinant_plasmid>
                </recombinant_expression>
                <molecular_weight>
                    <theoretical units="MDa">2.3</theoretical>
                </molecular_weight>
                <ribosome-details>ribosome-prokaryote: ALL</ribosome-details>
            </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>7.0</ph>
                        <details>20mM HEPES, 50mM KOAc, 6mM Mg[OAc]2, 1mM DTT, 500 ug/ml chloramphenicol,0.05% Nikkol,0.5% pill/ml Complete EDTA-free Protease inhibitor cocktail,0.1 U/ml RNasin and 125mM sucrose</details>
                    </buffer>
                    <vitrification>
                        <cryogen_name>ETHANE</cryogen_name>
                        <chamber_humidity units="percentage">100</chamber_humidity>
                        <chamber_temperature units="K">277.15</chamber_temperature>
                        <instrument>FEI VITROBOT MARK IV</instrument>
                        <method>Blot for 1.5 seconds before plunging</method>
                    </vitrification>
                </single_particle_preparation>
            </specimen_preparation_list>
            <microscopy_list>
                <single_particle_microscopy microscopy_id="1">
                    <microscope>FEI TITAN KRIOS</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">2.7</nominal_cs>
                    <nominal_defocus_min units="µm">1.0</nominal_defocus_min>
                    <nominal_defocus_max units="µm">3.5</nominal_defocus_max>
                    <nominal_magnification>22500.0</nominal_magnification>
                    <calibrated_magnification>37878.0</calibrated_magnification>
                    <specimen_holder_model>FEI TITAN KRIOS AUTOGRID HOLDER</specimen_holder_model>
                    <date>2014-05-08</date>
                    <image_recording_list>
                        <image_recording>
                            <film_or_detector_model category="CCD">GATAN K2 (4k x 4k)</film_or_detector_model>
                            <digitization_details>
                                <sampling_interval units="µm">4</sampling_interval>
                            </digitization_details>
                            <number_real_images>3908</number_real_images>
                            <average_electron_dose_per_image units="e/Å^2">16</average_electron_dose_per_image>
                            <details>Every image is the average of 14 frames recorded by the direct electron detector</details>
                        </image_recording>
                    </image_recording_list>
                </single_particle_microscopy>
                <single_particle_microscopy microscopy_id="2">
                    <microscope>FEI TITAN KRIOS</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">2.7</nominal_cs>
                    <nominal_defocus_min units="µm">1.0</nominal_defocus_min>
                    <nominal_defocus_max units="µm">3.5</nominal_defocus_max>
                    <nominal_magnification>22500.0</nominal_magnification>
                    <specimen_holder_model>FEI TITAN KRIOS AUTOGRID HOLDER</specimen_holder_model>
                    <date>2014-06-16</date>
                    <image_recording_list>
                        <image_recording>
                            <film_or_detector_model category="CCD">GATAN K2 (4k x 4k)</film_or_detector_model>
                            <digitization_details>
                                <sampling_interval units="µm">4</sampling_interval>
                            </digitization_details>
                            <number_real_images>3908</number_real_images>
                            <average_electron_dose_per_image units="e/Å^2">16</average_electron_dose_per_image>
                            <details>Every image is the average of 14 frames recorded by the direct electron detector</details>
                        </image_recording>
                    </image_recording_list>
                </single_particle_microscopy>
                <single_particle_microscopy microscopy_id="3">
                    <microscope>FEI TITAN KRIOS</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">2.7</nominal_cs>
                    <nominal_defocus_min units="µm">1.0</nominal_defocus_min>
                    <nominal_defocus_max units="µm">3.5</nominal_defocus_max>
                    <nominal_magnification>22500.0</nominal_magnification>
                    <specimen_holder_model>FEI TITAN KRIOS AUTOGRID HOLDER</specimen_holder_model>
                    <date>2014-08-30</date>
                    <image_recording_list>
                        <image_recording>
                            <film_or_detector_model category="CCD">GATAN K2 (4k x 4k)</film_or_detector_model>
                            <digitization_details>
                                <sampling_interval units="µm">4</sampling_interval>
                            </digitization_details>
                            <number_real_images>3908</number_real_images>
                            <average_electron_dose_per_image units="e/Å^2">16</average_electron_dose_per_image>
                            <details>Every image is the average of 14 frames recorded by the direct electron detector</details>
                        </image_recording>
                    </image_recording_list>
                </single_particle_microscopy>
            </microscopy_list>
            <singleparticle_processing image_processing_id="1">
                <ctf_correction>
                    <details>CTFFIND</details>
                </ctf_correction>
                <final_reconstruction>
                    <algorithm>OTHER</algorithm>
                    <resolution units="Å" res_type="BY AUTHOR">3.64</resolution>
                    <resolution_method>OTHER</resolution_method>
                    <software_list>
                        <software>
                            <name>RELION</name>
                        </software>
                    </software_list>
                    <number_images_used>60354</number_images_used>
                </final_reconstruction>
            </singleparticle_processing>
        </structure_determination>
    </structure_determination_list>
    <map format="CCP4" size_kbytes="128001">
        <file>emd_3188.map.gz</file>
        <symmetry>
            <space_group>1</space_group>
        </symmetry>
        <data_type>IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)</data_type>
        <dimensions>
            <col>320</col>
            <row>320</row>
            <sec>320</sec>
        </dimensions>
        <origin>
            <col>0</col>
            <row>0</row>
            <sec>0</sec>
        </origin>
        <spacing>
            <x>320</x>
            <y>320</y>
            <z>320</z>
        </spacing>
        <cell>
            <a units="Å">422.40002</a>
            <b units="Å">422.40002</b>
            <c units="Å">422.40002</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>-0.09889516</minimum>
            <maximum>0.18002944</maximum>
            <average>0.00023492</average>
            <std>0.00902666</std>
        </statistics>
        <pixel_spacing>
            <x units="Å">1.32</x>
            <y units="Å">1.32</y>
            <z units="Å">1.32</z>
        </pixel_spacing>
        <contour_list>
            <contour primary="true">
                <level>0.03</level>
                <source>AUTHOR</source>
            </contour>
        </contour_list>
        <annotation_details>Cryo EM reconstruction of SecM-Gly-RNC(ribosome-nascent-peptide-complex) with 50S mask</annotation_details>
        <details>::::EMDATABANK.org::::EMD-3188::::</details>
    </map>
    <interpretation>
        <modelling_list>
            <modelling>
                <initial_model>
                    <access_code>4V7T</access_code>
                    <chain>
                        <chain_id>B</chain_id>
                    </chain>
                </initial_model>
                <refinement_protocol>FLEXIBLE FIT</refinement_protocol>
                <software_list>
                    <software>
                        <name>Chimera, EMFit, Coot</name>
                    </software>
                </software_list>
                <refinement_space>RECIPROCAL</refinement_space>
            </modelling>
        </modelling_list>
        <figure_list>
            <figure>
                <file>emd_3188.tif</file>
            </figure>
        </figure_list>
        <segmentation_list>
            <segmentation>
                <file>emd_3188_msk.map</file>
                <mask_details format="CCP4" size_kbytes="128001">
                    <file>emd_3188_msk.map</file>
                    <symmetry>
                        <space_group>1</space_group>
                    </symmetry>
                    <data_type>IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)</data_type>
                    <dimensions>
                        <col>320</col>
                        <row>320</row>
                        <sec>320</sec>
                    </dimensions>
                    <origin>
                        <col>0</col>
                        <row>0</row>
                        <sec>0</sec>
                    </origin>
                    <spacing>
                        <x>320</x>
                        <y>320</y>
                        <z>320</z>
                    </spacing>
                    <cell>
                        <a units="Å">422.40002</a>
                        <b units="Å">422.40002</b>
                        <c units="Å">422.40002</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>0.0</minimum>
                        <maximum>1.0</maximum>
                        <average>0.07364544</average>
                        <std>0.25647718</std>
                    </statistics>
                    <pixel_spacing>
                        <x units="Å">1.32</x>
                        <y units="Å">1.32</y>
                        <z units="Å">1.32</z>
                    </pixel_spacing>
                    <annotation_details>This mask represent the large subunit with P/P-site tRNA</annotation_details>
                    <details>::::EMDATABANK.org::::</details>
                </mask_details>
            </segmentation>
        </segmentation_list>
    </interpretation>
    <validation>
        <fsc_curve>
            <file>emd_3188_fsc.xml</file>
        </fsc_curve>
    </validation>
</emd>
