<emd emdb_id="EMD-2836" version="3.0.1.1" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="https://github.com/emdb-empiar/emdb-schemas/blob/master/v3/v3_0_1_1/emdb_relaxed.xsd">
    <admin>
        <current_status>
            <code>REL</code>
            <processing_site>PDBe</processing_site>
        </current_status>
        <sites>
            <deposition>PDBe</deposition>
            <last_processing>PDBe</last_processing>
        </sites>
        <key_dates>
            <deposition>2014-12-10</deposition>
            <header_release>2014-12-24</header_release>
            <map_release>2014-12-24</map_release>
            <update>2015-03-11</update>
        </key_dates>
        <title>Cryo-EM structure of TMV reconstructed from data ranging from 6.1-10.2 e-/A^2 accumulated dose</title>
        <authors_list>
            <author>Fromm SA</author>
            <author>Bharat TAM</author>
            <author>Jakobi AJ</author>
            <author>Hagen WJH</author>
            <author>Sachse C</author>
        </authors_list>
        <keywords>tobacco mosaic virus, direct electron detectors, single particle helical reconstruction, radiation damage</keywords>
    </admin>
    <crossreferences>
        <citation_list>
            <primary_citation>
                <journal_citation published="true">
                    <author order="1">Fromm SA</author>
                    <author order="2">Bharat TA</author>
                    <author order="3">Jakobi AJ</author>
                    <author order="4">Hagen WJ</author>
                    <author order="5">Sachse C</author>
                    <title>Seeing tobacco mosaic virus through direct electron detectors.</title>
                    <journal>J.STRUCT.BIOL.</journal>
                    <volume>189</volume>
                    <first_page>87</first_page>
                    <last_page>97</last_page>
                    <year>2015</year>
                    <external_references type="PUBMED">25528571</external_references>
                    <external_references type="DOI">doi:10.1016/j.jsb.2014.12.002</external_references>
                </journal_citation>
            </primary_citation>
        </citation_list>
    </crossreferences>
    <sample>
        <name>Tobacco Mosaic Virus</name>
        <supramolecule_list>
            <sample_supramolecule supramolecule_id="1000">
                <name>Tobacco Mosaic Virus</name>
                <details>The sample was purified from infected leaves.</details>
                <oligomeric_state>helical</oligomeric_state>
                <number_unique_components>1</number_unique_components>
                <molecular_weight>
                    <theoretical units="MDa">39.5</theoretical>
                </molecular_weight>
            </sample_supramolecule>
            <virus_supramolecule supramolecule_id="1">
                <name synonym="TMV">Tobacco mosaic virus</name>
                <sci_species_name ncbi="12242">Tobacco mosaic virus</sci_species_name>
                <sci_species_strain>vulgare</sci_species_strain>
                <natural_host database="NCBI">
                    <organism ncbi="4097">Nicotiana tabacum</organism>
                    <synonym_organism>PLANTAE(HIGHER PLANTS)</synonym_organism>
                </natural_host>
                <host_system database="NCBI" />
                <molecular_weight>
                    <theoretical units="MDa">39.5</theoretical>
                </molecular_weight>
                <virus_shell shell_id="1">
                    <name>CP</name>
                    <diameter units="&#8491;">180</diameter>
                </virus_shell>
                <virus_type>VIRION</virus_type>
                <virus_isolate>STRAIN</virus_isolate>
                <virus_enveloped>false</virus_enveloped>
                <virus_empty>false</virus_empty>
                <syn_species_name>TMV</syn_species_name>
            </virus_supramolecule>
        </supramolecule_list>
    </sample>
    <structure_determination_list>
        <structure_determination structure_determination_id="1">
            <method>helical</method>
            <aggregation_state>filament</aggregation_state>
            <specimen_preparation_list>
                <helical_preparation preparation_id="1">
                    <concentration units="mg/mL">11.0</concentration>
                    <buffer>
                        <ph>7.0</ph>
                        <details>50 mM NaPO4</details>
                    </buffer>
                    <grid>
                        <details>Quantifoil 2/2 Cu 200 mesh grids</details>
                    </grid>
                    <vitrification>
                        <cryogen_name>ETHANE</cryogen_name>
                        <chamber_humidity units="percentage">90</chamber_humidity>
                        <chamber_temperature units="K">95</chamber_temperature>
                        <instrument>FEI VITROBOT MARK III</instrument>
                        <method>Blot for 8 seconds with an offset of -2 mm ~30-45 seconds after sample application</method>
                    </vitrification>
                </helical_preparation>
            </specimen_preparation_list>
            <microscopy_list>
                <helical_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="&#181;m">1.0</nominal_defocus_min>
                    <nominal_defocus_max units="&#181;m">4.5</nominal_defocus_max>
                    <nominal_magnification>75000.0</nominal_magnification>
                    <calibrated_magnification>131827.0</calibrated_magnification>
                    <specimen_holder_model>FEI TITAN KRIOS AUTOGRID HOLDER</specimen_holder_model>
                    <alignment_procedure>
                        <legacy>
                            <astigmatism>CTFTILT</astigmatism>
                        </legacy>
                    </alignment_procedure>
                    <details>Nanoprobe mode, dose rate ~41 e-/px/s on the camera level, fully automated acquisition using FEI EPU software</details>
                    <date>2013-10-16</date>
                    <image_recording_list>
                        <image_recording>
                            <film_or_detector_model category="CCD">FEI FALCON II (4k x 4k)</film_or_detector_model>
                            <number_real_images>109</number_real_images>
                            <average_electron_dose_per_image units="e/&#8491;^2">30.7</average_electron_dose_per_image>
                            <details>each micrograph was recorded as a movie of 7 frames excluding the roll-in frame corresponding to 2 e-/A^2 accumulated dose which was discarded</details>
                        </image_recording>
                    </image_recording_list>
                </helical_microscopy>
            </microscopy_list>
            <helical_processing image_processing_id="1">
                <details>Image processing was done using SPRING.</details>
                <final_reconstruction>
                    <applied_symmetry>
                        <helical_parameters>
                            <delta_z units="&#8491;">1.408</delta_z>
                            <delta_phi units="deg">22.03</delta_phi>
                            <axial_symmetry>C1</axial_symmetry>
                        </helical_parameters>
                    </applied_symmetry>
                    <algorithm>OTHER</algorithm>
                    <resolution res_type="BY AUTHOR" units="&#8491;">3.5</resolution>
                    <resolution_method>OTHER</resolution_method>
                    <software_list>
                        <software>
                            <name>SPRING</name>
                        </software>
                    </software_list>
                    <details>final map was calculated only from frame 2 of each micrograph corresponding to an accumulated dose range of 6.1-10.2 e-/A^2</details>
                </final_reconstruction>
                <ctf_correction>
                    <details>CTFTILT (specific for each segment)</details>
                </ctf_correction>
                <final_angle_assignment>
                    <details>SPIDER</details>
                </final_angle_assignment>
            </helical_processing>
        </structure_determination>
    </structure_determination_list>
    <map format="CCP4" size_kbytes="32732">
        <file>emd_2836.map.gz</file>
        <symmetry>
            <space_group>1</space_group>
        </symmetry>
        <data_type>IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)</data_type>
        <dimensions>
            <col>210</col>
            <row>210</row>
            <sec>190</sec>
        </dimensions>
        <origin>
            <col>-105</col>
            <row>-105</row>
            <sec>-95</sec>
        </origin>
        <spacing>
            <x>210</x>
            <y>210</y>
            <z>190</z>
        </spacing>
        <cell>
            <a units="&#8491;">223.02</a>
            <b units="&#8491;">223.02</b>
            <c units="&#8491;">201.78001</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>-3.52556205</minimum>
            <maximum>5.769382</maximum>
            <average>0.01445695</average>
            <std>0.72779012</std>
        </statistics>
        <pixel_spacing>
            <x units="&#8491;">1.062</x>
            <y units="&#8491;">1.062</y>
            <z units="&#8491;">1.062</z>
        </pixel_spacing>
        <contour_list>
            <contour primary="true">
                <level>1.2</level>
                <source>AUTHOR</source>
            </contour>
        </contour_list>
        <annotation_details>Cryo-EM structure of TMV reconstructed from data ranging from 6.1-10.2 e-/A^2 accumulated dose</annotation_details>
        <details>::::EMDATABANK.org::::EMD-2836::::</details>
    </map>
    <interpretation>
        <figure_list>
            <figure>
                <file>emd_2836.png</file>
            </figure>
        </figure_list>
    </interpretation>
    <validation>
        <fsc_curve>
            <file>emd_2836_fsc.xml</file>
        </fsc_curve>
    </validation>
</emd>