<emd emdb_id="EMD-1730" 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>2010-05-11</deposition>
            <header_release>2010-06-11</header_release>
            <map_release>2010-06-21</map_release>
            <update>2016-04-13</update>
        </key_dates>
        <title>4.6 Angstrom Cryo-EM reconstruction of Tobacco Mosaic Virus from images recorded at 300 KeV on a 4kx4k CCD camera</title>
        <authors_list>
            <author>Clare DK</author>
            <author>Orlova EV</author>
        </authors_list>
        <keywords>Cryo-EM, single particle processing, TMV, CCD data, 300 KeV electrons</keywords>
    </admin>
    <crossreferences>
        <citation_list>
            <primary_citation>
                <journal_citation published="true">
                    <author order="1">Clare DK</author>
                    <author order="2">Orlova EV</author>
                    <title>4.6A Cryo-EM reconstruction of tobacco mosaic virus from images recorded at 300 keV on a 4k x 4k CCD camera.</title>
                    <journal>J.STRUCT.BIOL.</journal>
                    <volume>171</volume>
                    <first_page>303</first_page>
                    <last_page>308</last_page>
                    <year>2010</year>
                    <external_references type="PUBMED">20558300</external_references>
                    <external_references type="DOI">doi:10.1016/j.jsb.2010.06.011</external_references>
                </journal_citation>
            </primary_citation>
        </citation_list>
        <pdb_list>
            <pdb_reference>
                <pdb_id>2xea</pdb_id>
                <relationship>
                    <in_frame>FULLOVERLAP</in_frame>
                </relationship>
            </pdb_reference>
        </pdb_list>
    </crossreferences>
    <sample>
        <name>Tobacco Mosaic Virus</name>
        <supramolecule_list>
            <sample_supramolecule supramolecule_id="1000">
                <name>Tobacco Mosaic Virus</name>
                <details>Monodisperse</details>
                <oligomeric_state>Homo-oligomer of TMV coat protein and ssRNA</oligomeric_state>
                <number_unique_components>2</number_unique_components>
                <molecular_weight>
                    <experimental units="MDa">0.175</experimental>
                    <theoretical units="MDa">0.175</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>
                <natural_host database="NCBI">
                    <organism ncbi="4085">Nicotiana</organism>
                    <synonym_organism>PLANTAE(HIGHER PLANTS)</synonym_organism>
                </natural_host>
                <host_system database="NCBI" />
                <molecular_weight>
                    <experimental units="MDa">0.175</experimental>
                    <theoretical units="MDa">0.175</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>OTHER</virus_isolate>
                <virus_enveloped>false</virus_enveloped>
                <virus_empty>false</virus_empty>
                <syn_species_name>TMV</syn_species_name>
            </virus_supramolecule>
        </supramolecule_list>
        <macromolecule_list>
            <rna macromolecule_id="1">
                <name synonym="RNA">ssRNA</name>
                <natural_source database="NCBI">
                    <organism ncbi="12242">Tobacco mosaic virus</organism>
                    <synonym_organism>TMV</synonym_organism>
                </natural_source>
                <classification>OTHER</classification>
                <structure>SINGLE STRANDED</structure>
                <synthetic_flag>false</synthetic_flag>
            </rna>
        </macromolecule_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">3</concentration>
                    <buffer>
                        <ph>7.4</ph>
                        <details>50 mM Tris-HCl, 50 mM KCl, 10 mM MgCl2</details>
                    </buffer>
                    <staining>
                        <type>NEGATIVE</type>
                        <details>3.5ul of TMV was added to R2/2 C-flat grid, blotted, then plunge frozen in liquid ethane</details>
                    </staining>
                    <grid>
                        <details>400 mesh R2/2 c-flat grids</details>
                    </grid>
                    <vitrification>
                        <cryogen_name>ETHANE</cryogen_name>
                        <chamber_humidity units="percentage">60</chamber_humidity>
                        <chamber_temperature units="K">100</chamber_temperature>
                        <instrument>HOMEMADE PLUNGER</instrument>
                        <details>Vitrification instrument: Home made plunger</details>
                        <method>Grids were blotted for around 2 seconds and then rapidly plunged into liquid ethane</method>
                    </vitrification>
                </helical_preparation>
            </specimen_preparation_list>
            <microscopy_list>
                <helical_microscopy microscopy_id="1">
                    <microscope>FEI POLARA 300</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">2.3</nominal_cs>
                    <nominal_defocus_min units="&#181;m">0.9</nominal_defocus_min>
                    <nominal_defocus_max units="&#181;m">3.0</nominal_defocus_max>
                    <nominal_magnification>90000.0</nominal_magnification>
                    <calibrated_magnification>121000.0</calibrated_magnification>
                    <specimen_holder_model>GATAN HELIUM</specimen_holder_model>
                    <temperature>
                        <temperature_average units="K">78</temperature_average>
                    </temperature>
                    <alignment_procedure>
                        <legacy>
                            <astigmatism>Corrected at 115,000 times</astigmatism>
                        </legacy>
                    </alignment_procedure>
                    <date>2009-02-01</date>
                    <image_recording_list>
                        <image_recording>
                            <film_or_detector_model category="CCD">GATAN ULTRASCAN 4000 (4k x 4k)</film_or_detector_model>
                            <digitization_details>
                                <sampling_interval units="&#181;m">15</sampling_interval>
                            </digitization_details>
                            <number_real_images>104</number_real_images>
                            <average_electron_dose_per_image units="e/&#8491;^2">25</average_electron_dose_per_image>
                            <bits_per_pixel>16.</bits_per_pixel>
                        </image_recording>
                    </image_recording_list>
                    <specimen_holder>Eucentric</specimen_holder>
                </helical_microscopy>
            </microscopy_list>
            <helical_processing image_processing_id="1">
                <details>The particle were selected using the helical option in boxer</details>
                <final_reconstruction>
                    <applied_symmetry>
                        <helical_parameters>
                            <delta_z units="&#8491;">1.408</delta_z>
                            <delta_phi units="deg">22.04</delta_phi>
                            <axial_symmetry>C1</axial_symmetry>
                        </helical_parameters>
                    </applied_symmetry>
                    <algorithm>OTHER</algorithm>
                    <resolution res_type="BY AUTHOR" units="&#8491;">4.6</resolution>
                    <resolution_method>FSC 0.5 CUT-OFF</resolution_method>
                    <software_list>
                        <software>
                            <name>SPIDER, IMAGIC</name>
                        </software>
                    </software_list>
                    <details>BPRP was used for reconstruction</details>
                </final_reconstruction>
                <ctf_correction>
                    <details>Each particle was fully CTF corrected</details>
                </ctf_correction>
                <final_angle_assignment>
                    <details>80-100 in theta and 0-22.04 in phi in 0.5 steps</details>
                </final_angle_assignment>
            </helical_processing>
        </structure_determination>
    </structure_determination_list>
    <map format="CCP4" size_kbytes="31251">
        <file>emd_1730.map.gz</file>
        <symmetry>
            <space_group>1</space_group>
        </symmetry>
        <data_type>IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)</data_type>
        <dimensions>
            <col>200</col>
            <row>200</row>
            <sec>200</sec>
        </dimensions>
        <origin>
            <col>-100</col>
            <row>-100</row>
            <sec>-100</sec>
        </origin>
        <spacing>
            <x>200</x>
            <y>200</y>
            <z>200</z>
        </spacing>
        <cell>
            <a units="&#8491;">248</a>
            <b units="&#8491;">248</b>
            <c units="&#8491;">248</c>
            <alpha units="deg">90</alpha>
            <beta units="deg">90</beta>
            <gamma units="deg">90</gamma>
        </cell>
        <axis_order>
            <fast>Y</fast>
            <medium>X</medium>
            <slow>Z</slow>
        </axis_order>
        <statistics>
            <minimum>-26.271799999999999</minimum>
            <maximum>46.868499999999997</maximum>
            <average>0.551206</average>
            <std>5.7358</std>
        </statistics>
        <pixel_spacing>
            <x units="&#8491;">1.24</x>
            <y units="&#8491;">1.24</y>
            <z units="&#8491;">1.24</z>
        </pixel_spacing>
        <contour_list>
            <contour primary="true">
                <level>6.1</level>
                <source>AUTHOR</source>
            </contour>
        </contour_list>
        <annotation_details>B-factor scaled fully CTF corrected  density map of TMV</annotation_details>
        <details>::::EMDATABANK.org::::EMD-1730::::</details>
    </map>
    <interpretation>
        <modelling_list>
            <modelling>
                <initial_model>
                    <access_code>2OM3</access_code>
                </initial_model>
                <refinement_protocol>RIGID BODY FIT</refinement_protocol>
                <software_list>
                    <software>
                        <name>Chimera and Coot</name>
                    </software>
                </software_list>
                <details>Protocol: Rigid body, real space. The PDB was initially fitted using chimera, the coordinates were then refined using Coot</details>
                <target_criteria>Cross-correlation coefficient</target_criteria>
                <refinement_space>REAL</refinement_space>
            </modelling>
        </modelling_list>
    </interpretation>
</emd>