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    <admin>
        <current_status>
            <date>2024-10-09</date>
            <code>REL</code>
            <processing_site>RCSB</processing_site>
        </current_status>
        <sites>
            <deposition>RCSB</deposition>
            <last_processing>RCSB</last_processing>
        </sites>
        <key_dates>
            <deposition>2016-05-26</deposition>
            <header_release>2016-06-22</header_release>
            <map_release>2016-06-22</map_release>
            <update>2024-10-09</update>
        </key_dates>
        <title>MicroED structure of trypsin at 1.7 A resolution</title>
        <authors_list>
            <author>de la Cruz MJ</author>
            <author>Hattne J</author>
        </authors_list>
        <keywords>Hydrolase</keywords>
    </admin>
    <crossreferences>
        <citation_list>
            <primary_citation>
                <journal_citation published="true">
                    <author order="1">de la Cruz MJ</author>
                    <author order="2">Hattne J</author>
                    <author order="3">Shi D</author>
                    <author order="4">Seidler P</author>
                    <author order="5">Rodriguez J</author>
                    <author order="6">Reyes FE</author>
                    <author order="7">Sawaya MR</author>
                    <author order="8">Cascio D</author>
                    <author order="9">Weiss SC</author>
                    <author order="10">Kim SK</author>
                    <author order="11">Hinck CS</author>
                    <author order="12">Hinck AP</author>
                    <author order="13">Calero G</author>
                    <author order="14">Eisenberg D</author>
                    <author order="15">Gonen T</author>
                    <title>Atomic-resolution structures from fragmented protein crystals with the cryoEM method MicroED.</title>
                    <journal_abbreviation>Nat. Methods</journal_abbreviation>
                    <country>US</country>
                    <volume>14</volume>
                    <first_page>399</first_page>
                    <last_page>402</last_page>
                    <year>2017</year>
                    <external_references type="PUBMED">28192420</external_references>
                    <external_references type="DOI">doi:10.1038/nmeth.4178</external_references>
                    <external_references type="ISSN">1548-7105</external_references>
                </journal_citation>
            </primary_citation>
        </citation_list>
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                <emdb_id>EMD-8216</emdb_id>
                <relationship>
                    <other>other EM volume</other>
                </relationship>
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            <emdb_reference>
                <emdb_id>EMD-8217</emdb_id>
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                    <other>other EM volume</other>
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            <emdb_reference>
                <emdb_id>EMD-8218</emdb_id>
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                    <other>other EM volume</other>
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            <emdb_reference>
                <emdb_id>EMD-8219</emdb_id>
                <relationship>
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            <emdb_reference>
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                <relationship>
                    <in_frame>FULLOVERLAP</in_frame>
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    <sample>
        <name>Trypsin</name>
        <supramolecule_list>
            <organelle_or_cellular_component_supramolecule supramolecule_id="1">
                <name>Trypsin</name>
                <parent>0</parent>
                <macromolecule_list>
                    <macromolecule>
                        <macromolecule_id>1</macromolecule_id>
                    </macromolecule>
                </macromolecule_list>
                <natural_source database="NCBI">
                    <organism ncbi="9913">Bos taurus</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.023354</theoretical>
                </molecular_weight>
            </organelle_or_cellular_component_supramolecule>
        </supramolecule_list>
        <macromolecule_list>
            <protein_or_peptide macromolecule_id="1">
                <name>Cationic trypsin</name>
                <natural_source database="NCBI">
                    <organism ncbi="9913">Bos taurus</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.023324287</theoretical>
                </molecular_weight>
                <number_of_copies>1</number_of_copies>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>IVGGYTCGANTVPYQVSLNSGYHFCGGSLINSQWVVSAAHCYKSGIQVRLGEDNINVVEGNEQFISASKSIVHPSYNSNT
LNNDIMLIKLKSAASLNSRVASISLPTSCASAGTQCLISGWGNTKSSGTSYPDVLKCLKAPILSDSSCKSAYPGQITSNM
FCAGYLEGGKDSCQGDSGGPVVCSGKLQGIVSWGSGCAQKNKPGVYTKVCNYVSWIKQTIASN</string>
                    <external_references type="UNIPROTKB">P00760</external_references>
                </sequence>
                <ec_number>3.4.21.4</ec_number>
            </protein_or_peptide>
            <ligand macromolecule_id="2">
                <name>CALCIUM ION</name>
                <molecular_weight>
                    <theoretical units="MDa">4.0078e-05</theoretical>
                </molecular_weight>
                <number_of_copies>2</number_of_copies>
                <formula>CA</formula>
            </ligand>
            <ligand macromolecule_id="3">
                <name>water</name>
                <molecular_weight>
                    <theoretical units="MDa">1.8015e-05</theoretical>
                </molecular_weight>
                <number_of_copies>195</number_of_copies>
                <formula>HOH</formula>
            </ligand>
        </macromolecule_list>
    </sample>
    <structure_determination_list>
        <structure_determination structure_determination_id="1">
            <method>electronCrystallography</method>
            <aggregation_state>threeDArray</aggregation_state>
            <specimen_preparation_list>
                <crystallography_preparation preparation_id="1">
                    <buffer>
                        <ph>6.5</ph>
                        <component>
                            <concentration units="mg/ml">10.0</concentration>
                            <name>benzamidine</name>
                        </component>
                        <component>
                            <concentration units="mM">3.0</concentration>
                            <formula>CaCl</formula>
                            <name>calcium chloride</name>
                        </component>
                    </buffer>
                    <vitrification>
                        <cryogen_name>ETHANE</cryogen_name>
                    </vitrification>
                </crystallography_preparation>
            </specimen_preparation_list>
            <microscopy_list>
                <crystallography_microscopy microscopy_id="1">
                    <microscope>FEI TECNAI F20</microscope>
                    <illumination_mode>FLOOD BEAM</illumination_mode>
                    <imaging_mode>DIFFRACTION</imaging_mode>
                    <electron_source>FIELD EMISSION GUN</electron_source>
                    <acceleration_voltage units="kV">200</acceleration_voltage>
                    <cooling_holder_cryogen>NITROGEN</cooling_holder_cryogen>
                    <image_recording_list>
                        <image_recording image_recording_id="1">
                            <film_or_detector_model>TVIPS TEMCAM-F416 (4k x 4k)</film_or_detector_model>
                            <digitization_details>
                                <dimensions>
                                    <width units="pixel">2048</width>
                                    <height units="pixel">2048</height>
                                </dimensions>
                            </digitization_details>
                            <number_grids_imaged>3</number_grids_imaged>
                            <number_real_images>1527</number_real_images>
                            <number_diffraction_images>1527</number_diffraction_images>
                            <average_exposure_time units="s">4.1</average_exposure_time>
                            <average_electron_dose_per_image units="e/Å^2">0.004</average_electron_dose_per_image>
                        </image_recording>
                    </image_recording_list>
                    <camera_length units="mm">1500</camera_length>
                </crystallography_microscopy>
            </microscopy_list>
            <crystallography_processing image_processing_id="1">
                <image_recording_id>1</image_recording_id>
                <final_reconstruction>
                    <resolution units="Å" res_type="BY AUTHOR">1.7</resolution>
                    <resolution_method>DIFFRACTION PATTERN/LAYERLINES</resolution_method>
                </final_reconstruction>
                <molecular_replacement>
                    <software_list>
                        <software>
                            <name>MOLREP</name>
                            <version>11.4.05</version>
                            <processing_details>Starting model PDB ID 2ptn</processing_details>
                        </software>
                    </software_list>
                </molecular_replacement>
                <symmetry_determination_software_list>
                    <software>
                        <name>POINTLESS</name>
                        <version>1.10.21</version>
                    </software>
                </symmetry_determination_software_list>
                <merging_software_list>
                    <software>
                        <name>AIMLESS</name>
                        <version>0.5.25</version>
                    </software>
                </merging_software_list>
                <crystallography_statistics>
                    <number_intensities_measured>145833</number_intensities_measured>
                    <number_structure_factors>23542</number_structure_factors>
                    <fourier_space_coverage>73.799999999999997</fourier_space_coverage>
                    <r_sym>0.773</r_sym>
                    <r_merge>0.773</r_merge>
                    <overall_phase_error>28.86</overall_phase_error>
                    <overall_phase_residual>40.399999999999999</overall_phase_residual>
                    <phase_error_rejection_criteria>0</phase_error_rejection_criteria>
                    <high_resolution units="Å">1.5</high_resolution>
                    <shell_list>
                        <shell shell_id="1">
                            <high_resolution units="Å">1.7</high_resolution>
                            <low_resolution units="Å">1.79</low_resolution>
                            <number_structure_factors>1737</number_structure_factors>
                            <phase_residual>60.700000000000003</phase_residual>
                            <fourier_space_coverage>56.200000000000003</fourier_space_coverage>
                            <multiplicity>3.1</multiplicity>
                        </shell>
                    </shell_list>
                </crystallography_statistics>
            </crystallography_processing>
        </structure_determination>
    </structure_determination_list>
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        <file>emd_8220.map.gz</file>
        <symmetry>
            <space_group>19</space_group>
        </symmetry>
        <data_type>IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)</data_type>
        <dimensions>
            <col>86</col>
            <row>100</row>
            <sec>100</sec>
        </dimensions>
        <origin>
            <col>-80</col>
            <row>-54</row>
            <sec>-31</sec>
        </origin>
        <spacing>
            <x>96</x>
            <y>100</y>
            <z>112</z>
        </spacing>
        <cell>
            <a units="Å">53.184002</a>
            <b units="Å">56.428497</b>
            <c units="Å">64.6722</c>
            <alpha units="deg">90.0</alpha>
            <beta units="deg">90.0</beta>
            <gamma units="deg">90.0</gamma>
        </cell>
        <axis_order>
            <fast>Y</fast>
            <medium>X</medium>
            <slow>Z</slow>
        </axis_order>
        <statistics>
            <minimum>-0.054148965</minimum>
            <maximum>0.17173952</maximum>
            <average>0.00002090898</average>
            <std>0.018716726</std>
        </statistics>
        <pixel_spacing>
            <x units="Å">0.554</x>
            <y units="Å">0.564285</y>
            <z units="Å">0.57743037</z>
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        <contour_list>
            <contour primary="true">
                <level>0.03</level>
                <source>EMDB</source>
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        </contour_list>
        <label>::::EMDATABANK.org::::EMD-8220::::</label>
        <annotation_details>Trypsin</annotation_details>
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        <modelling_list>
            <modelling>
                <initial_model>
                    <access_code>2PTN</access_code>
                    <chain>
                        <chain_id>A</chain_id>
                        <residue_range>16-245</residue_range>
                        <source_name>PDB</source_name>
                        <initial_model_type>experimental model</initial_model_type>
                    </chain>
                </initial_model>
                <refinement_protocol>OTHER</refinement_protocol>
                <refinement_space>RECIPROCAL</refinement_space>
            </modelling>
        </modelling_list>
    </interpretation>
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