<?xml version="1.0" encoding="UTF-8"?>
<emd xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="https://ftp.ebi.ac.uk/pub/databases/em_ebi/emdb_related/emdb-schemas/emdb_schemas/v3/v3_0_9_3/emdb.xsd" version="3.0.9.3" emdb_id="EMD-24001">
    <admin>
        <current_status>
            <date>2024-05-29</date>
            <code>REL</code>
            <processing_site>RCSB</processing_site>
        </current_status>
        <sites>
            <deposition>RCSB</deposition>
            <last_processing>RCSB</last_processing>
        </sites>
        <key_dates>
            <deposition>2021-05-14</deposition>
            <header_release>2021-11-24</header_release>
            <map_release>2021-11-24</map_release>
            <update>2024-05-29</update>
        </key_dates>
        <grant_support>
            <grant_reference>
                <funding_body>Department of Energy (DOE, United States)</funding_body>
                <code>DE-SC00016240</code>
                <country>United States</country>
            </grant_reference>
            <grant_reference>
                <funding_body>National Science Foundation (NSF, United States)</funding_body>
                <code>GRFP-1106400</code>
                <country>United States</country>
            </grant_reference>
        </grant_support>
        <title>Thermotoga maritima encapsulin shell</title>
        <authors_list>
            <author>LaFrance BJ</author>
            <author>Nogales E</author>
        </authors_list>
        <keywords>Encapsulin, Ferritin-like protein, EncFLP, Thermotoga, FMN, Bacterial Nanocompartment, VIRUS LIKE PARTICLE</keywords>
    </admin>
    <crossreferences>
        <citation_list>
            <primary_citation>
                <journal_citation published="true">
                    <author order="1">LaFrance BJ</author>
                    <author order="2">Cassidy-Amstutz C</author>
                    <author order="3">Nichols RJ</author>
                    <author order="4">Oltrogge LM</author>
                    <author order="5">Nogales E</author>
                    <author order="6">Savage DF</author>
                    <title>The encapsulin from Thermotoga maritima is a flavoprotein with a symmetry matched ferritin-like cargo protein.</title>
                    <journal_abbreviation>Sci Rep</journal_abbreviation>
                    <country>UK</country>
                    <volume>11</volume>
                    <first_page>22810</first_page>
                    <last_page>22810</last_page>
                    <year>2021</year>
                    <external_references type="PUBMED">34815415</external_references>
                    <external_references type="DOI">doi:10.1038/s41598-021-01932-w</external_references>
                    <external_references type="ISSN">2045-2322</external_references>
                </journal_citation>
            </primary_citation>
        </citation_list>
        <pdb_list>
            <pdb_reference>
                <pdb_id>7mu1</pdb_id>
                <relationship>
                    <in_frame>FULLOVERLAP</in_frame>
                </relationship>
            </pdb_reference>
        </pdb_list>
    </crossreferences>
    <sample>
        <name>3.3A cryo-EM map of the T. maritima encapsulin shell</name>
        <supramolecule_list>
            <organelle_or_cellular_component_supramolecule supramolecule_id="1">
                <name>3.3A cryo-EM map of the T. maritima encapsulin shell</name>
                <parent>0</parent>
                <macromolecule_list>
                    <macromolecule>
                        <macromolecule_id>1</macromolecule_id>
                    </macromolecule>
                </macromolecule_list>
                <natural_source database="NCBI">
                    <organism ncbi="2336">Thermotoga maritima</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">1.83</theoretical>
                </molecular_weight>
            </organelle_or_cellular_component_supramolecule>
        </supramolecule_list>
        <macromolecule_list>
            <protein_or_peptide macromolecule_id="1">
                <name>Maritimacin</name>
                <natural_source database="NCBI">
                    <organism ncbi="2336">Thermotoga maritima</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.030369615</theoretical>
                </molecular_weight>
                <number_of_copies>1</number_of_copies>
                <recombinant_expression database="NCBI">
                    <recombinant_organism ncbi="469008">Escherichia coli BL21(DE3)</recombinant_organism>
                </recombinant_expression>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>MEFLKRSFAPLTEKQWQEIDNRAREIFKTQLYGRKFVDVEGPYGWEYAAHPLGEVEVLSDENEVVKWGLRKSLPLIELRA
TFTLDLWELDNLERGKPNVDLSSLEETVRKVAEFEDEVIFRGCEKSGVKGLLSFEERKIECGSTPKDLLEAIVRALSIFS
KDGIEGPYTLVINTDRWINFLKEEAGHYPLEKRVEECLRGGKIITTPRIEDALVVSERGGDFKLILGQDLSIGYEDREKD
AVRLFITETFTFQVVNPEALILLK</string>
                    <external_references type="UNIPROTKB">Q9WZP2</external_references>
                </sequence>
                <ec_number>3.4.-.-</ec_number>
            </protein_or_peptide>
            <ligand macromolecule_id="2">
                <name>FLAVIN MONONUCLEOTIDE</name>
                <molecular_weight>
                    <theoretical units="MDa">0.00045634399999999997</theoretical>
                </molecular_weight>
                <number_of_copies>1</number_of_copies>
                <formula>FMN</formula>
            </ligand>
        </macromolecule_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">
                    <concentration units="mg/mL">2.0</concentration>
                    <buffer>
                        <ph>7.4</ph>
                        <details>20 mM Tris-HCl, pH 7.4, 150 mM NaCl and 5 mM 2-mercaptoethanol</details>
                    </buffer>
                    <grid>
                        <model>C-flat-1.2/1.3</model>
                        <material>COPPER</material>
                        <mesh>400</mesh>
                        <pretreatment>
                            <type>GLOW DISCHARGE</type>
                            <time units="s">20</time>
                        </pretreatment>
                    </grid>
                    <vitrification>
                        <cryogen_name>ETHANE-PROPANE</cryogen_name>
                        <chamber_humidity units="percentage">100</chamber_humidity>
                        <chamber_temperature units="K">277</chamber_temperature>
                        <instrument>FEI VITROBOT MARK IV</instrument>
                        <details>blot force. </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">2.7</nominal_cs>
                    <nominal_defocus_min units="µm">1.5</nominal_defocus_min>
                    <nominal_defocus_max units="µm">2.8000000000000003</nominal_defocus_max>
                    <specimen_holder_model>GATAN 626 SINGLE TILT LIQUID NITROGEN CRYO TRANSFER HOLDER</specimen_holder_model>
                    <cooling_holder_cryogen>NITROGEN</cooling_holder_cryogen>
                    <alignment_procedure>
                        <coma_free/>
                    </alignment_procedure>
                    <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>COUNTING</detector_mode>
                            <digitization_details>
                                <dimensions>
                                    <width units="pixel">3838</width>
                                    <height units="pixel">3710</height>
                                </dimensions>
                            </digitization_details>
                            <number_grids_imaged>1</number_grids_imaged>
                            <number_real_images>1276</number_real_images>
                            <average_electron_dose_per_image units="e/Å^2">40.0</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>
                <details>Images were saved in counting mode using leginon software, and subsequently processed in RELION.</details>
                <particle_selection>
                    <number_selected>86124</number_selected>
                    <details>1000 particles were manually selected from random micrographs. 2D classification was performed on these 1000 particles, and 2D classes were used for relion auto picking</details>
                </particle_selection>
                <startup_model type_of_model="PDB ENTRY">
                    <pdb_model>
                        <pdb_id>3DKT</pdb_id>
                    </pdb_model>
                    <details>Original T. maritima crystal structure from Sutter et al
'molmap' function in Chimera was used to generate surface model. Initial model was lowpass filtered to 30A for initial reconstruction, and once high-resolution was achieved, a 5A model was used to assure the correct handedness.</details>
                </startup_model>
                <final_reconstruction>
                    <number_classes_used>1</number_classes_used>
                    <applied_symmetry>
                        <point_group>I</point_group>
                    </applied_symmetry>
                    <resolution units="Å" res_type="BY AUTHOR">3.3</resolution>
                    <resolution_method>FSC 0.143 CUT-OFF</resolution_method>
                    <software_list>
                        <software>
                            <name>RELION</name>
                            <version>3.1</version>
                        </software>
                    </software_list>
                    <number_images_used>38952</number_images_used>
                </final_reconstruction>
                <initial_angle_assignment>
                    <type>MAXIMUM LIKELIHOOD</type>
                    <software_list>
                        <software>
                            <name>RELION</name>
                            <version>3.1</version>
                        </software>
                    </software_list>
                </initial_angle_assignment>
                <final_angle_assignment>
                    <type>MAXIMUM LIKELIHOOD</type>
                    <software_list>
                        <software>
                            <name>RELION</name>
                            <version>3.1</version>
                        </software>
                    </software_list>
                </final_angle_assignment>
            </singleparticle_processing>
        </structure_determination>
    </structure_determination_list>
    <map format="CCP4" size_kbytes="536871">
        <file>emd_24001.map.gz</file>
        <symmetry>
            <space_group>1</space_group>
        </symmetry>
        <data_type>IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)</data_type>
        <dimensions>
            <col>512</col>
            <row>512</row>
            <sec>512</sec>
        </dimensions>
        <origin>
            <col>0</col>
            <row>0</row>
            <sec>0</sec>
        </origin>
        <spacing>
            <x>512</x>
            <y>512</y>
            <z>512</z>
        </spacing>
        <cell>
            <a units="Å">419.84</a>
            <b units="Å">419.84</b>
            <c units="Å">419.84</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>-0.035822354</minimum>
            <maximum>0.07585681</maximum>
            <average>0.0004622815</average>
            <std>0.003631274</std>
        </statistics>
        <pixel_spacing>
            <x units="Å">0.82</x>
            <y units="Å">0.82</y>
            <z units="Å">0.82</z>
        </pixel_spacing>
        <contour_list>
            <contour primary="true">
                <level>0.02</level>
                <source>AUTHOR</source>
            </contour>
        </contour_list>
        <label>::::EMDATABANK.org::::EMD-24001::::</label>
        <annotation_details>Final cryo-EM map for the T maritima encapsulin shell</annotation_details>
    </map>
    <interpretation>
        <modelling_list>
            <modelling>
                <initial_model>
                    <access_code>3DKT</access_code>
                    <chain>
                        <chain_id>A</chain_id>
                        <source_name>PDB</source_name>
                        <initial_model_type>experimental model</initial_model_type>
                    </chain>
                </initial_model>
                <refinement_protocol>FLEXIBLE FIT</refinement_protocol>
                <overall_bvalue>38.0</overall_bvalue>
            </modelling>
        </modelling_list>
        <segmentation_list>
            <segmentation>
                <file>emd_24001_msk_1.map</file>
            </segmentation>
        </segmentation_list>
    </interpretation>
</emd>
