<emd emdb_id="EMD-2973" 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>2015-04-01</deposition>
            <header_release>2015-04-15</header_release>
            <map_release>2015-04-15</map_release>
            <update>2015-04-15</update>
        </key_dates>
        <title>electron crystallographic structure of lens Aquaporin-0 (AQP0) (lens MIP) at 1.9A resolution, in a closed pore state</title>
        <authors_list>
            <author>Gonen T</author>
            <author>Cheng Y</author>
            <author>Sliz P</author>
            <author>Hiroaki Y</author>
            <author>Fujiyoshi Y</author>
            <author>Harrison SC</author>
            <author>Walz T</author>
        </authors_list>
        <keywords>Aquaporin-0, electron crystallography, membrane channel</keywords>
    </admin>
    <crossreferences>
        <citation_list>
            <primary_citation>
                <journal_citation published="true">
                    <author order="1">Gonen T</author>
                    <author order="2">Cheng Y</author>
                    <author order="3">Sliz P</author>
                    <author order="4">Hiroaki Y</author>
                    <author order="5">Fujiyoshi Y</author>
                    <author order="6">Harrison SC</author>
                    <author order="7">Walz T</author>
                    <title>Lipid-protein interactions in double-layered two-dimensional AQP0 crystals.</title>
                    <journal>NATURE</journal>
                    <volume>438</volume>
                    <first_page>633</first_page>
                    <last_page>638</last_page>
                    <year>2005</year>
                    <external_references type="PUBMED">16319884</external_references>
                    <external_references type="DOI">doi:10.1038/nature04321</external_references>
                </journal_citation>
            </primary_citation>
        </citation_list>
    </crossreferences>
    <sample>
        <name>Mammalian Aquaporin-0 (Sheep)</name>
        <supramolecule_list>
            <sample_supramolecule supramolecule_id="1000">
                <name>Mammalian Aquaporin-0 (Sheep)</name>
                <oligomeric_state>two tetramers</oligomeric_state>
                <number_unique_components>1</number_unique_components>
                <molecular_weight>
                    <experimental units="MDa">0.12</experimental>
                    <theoretical units="MDa">0.12</theoretical>
                    <method>SDS PAGE</method>
                </molecular_weight>
            </sample_supramolecule>
        </supramolecule_list>
        <macromolecule_list>
            <protein_or_peptide macromolecule_id="1">
                <name synonym="Lens MIP, MP26">Aquaporin-0</name>
                <natural_source database="NCBI">
                    <organism ncbi="9940">Ovis aries</organism>
                    <synonym_organism>Sheep</synonym_organism>
                    <tissue>eye lens</tissue>
                    <cell>lens fiber cells</cell>
                    <cellular_location>plasma membrane</cellular_location>
                </natural_source>
                <molecular_weight>
                    <experimental units="MDa">0.12</experimental>
                    <theoretical units="MDa">0.12</theoretical>
                </molecular_weight>
                <number_of_copies>8</number_of_copies>
                <oligomeric_state>two tetramers</oligomeric_state>
                <recombinant_exp_flag>false</recombinant_exp_flag>
                <recombinant_expression database="NCBI" />
                <sequence />
            </protein_or_peptide>
        </macromolecule_list>
    </sample>
    <structure_determination_list>
        <structure_determination structure_determination_id="1">
            <method>electronCrystallography</method>
            <aggregation_state>twoDArray</aggregation_state>
            <specimen_preparation_list>
                <crystallography_preparation preparation_id="1">
                    <concentration units="mg/mL">5</concentration>
                    <buffer>
                        <ph>8.0</ph>
                        <details>20mM Tris pH 8, 150mM NaCl, 25mM MgCl2</details>
                    </buffer>
                    <grid>
                        <details>Mo hexagonal grids</details>
                    </grid>
                    <vitrification>
                        <cryogen_name>HELIUM</cryogen_name>
                        <chamber_temperature units="K">4</chamber_temperature>
                        <instrument>OTHER</instrument>
                    </vitrification>
                    <details>dialysis into 2d sheets</details>
                    <crystal_formation>
                        <details>dialysis into 2d sheets</details>
                    </crystal_formation>
                </crystallography_preparation>
            </specimen_preparation_list>
            <microscopy_list>
                <crystallography_microscopy microscopy_id="1">
                    <microscope>JEOL 3200FSC</microscope>
                    <illumination_mode>FLOOD BEAM</illumination_mode>
                    <imaging_mode>DIFFRACTION</imaging_mode>
                    <electron_source>FIELD EMISSION GUN</electron_source>
                    <acceleration_voltage units="kV">300</acceleration_voltage>
                    <nominal_cs units="mm">1.2</nominal_cs>
                    <specimen_holder_model>JEOL 3200FSC CRYOHOLDER</specimen_holder_model>
                    <temperature>
                        <temperature_min units="K">4</temperature_min>
                        <temperature_max units="K">30</temperature_max>
                        <temperature_average units="K">8</temperature_average>
                    </temperature>
                    <specialist_optics>
                        <energy_filter>
                            <name>omega filter JEOL</name>
                        </energy_filter>
                    </specialist_optics>
                    <date>2004-10-09</date>
                    <image_recording_list>
                        <image_recording>
                            <film_or_detector_model category="CCD">TVIPS TEMCAM-F416 (4k x 4k)</film_or_detector_model>
                            <number_real_images>286</number_real_images>
                            <average_electron_dose_per_image units="e/&#8491;^2">20</average_electron_dose_per_image>
                            <detector_distance>1500</detector_distance>
                        </image_recording>
                    </image_recording_list>
                    <specimen_holder>Helium Cooled</specimen_holder>
                    <tilt_angle_min>0</tilt_angle_min>
                    <tilt_angle_max>70</tilt_angle_max>
                    <tilt_series>
                        <axis1>
                            <min_angle units="deg">0</min_angle>
                            <max_angle units="deg">70</max_angle>
                        </axis1>
                    </tilt_series>
                </crystallography_microscopy>
            </microscopy_list>
            <crystallography_processing image_processing_id="1">
                <details>Data was processed in XDP. Model building in O and refinement in CNS.</details>
                <final_reconstruction>
                    <resolution res_type="BY AUTHOR" units="&#8491;">1.9</resolution>
                    <resolution_method>DIFFRACTION PATTERN/LAYERLINES</resolution_method>
                    <details>This submission corresponds to the PDB entry 2B6O.</details>
                </final_reconstruction>
                <crystal_parameters>
                    <unit_cell>
                        <a units="&#8491;">65.5</a>
                        <b units="&#8491;">65.5</b>
                        <c units="&#8491;">160</c>
                        <gamma units="deg">90</gamma>
                        <alpha units="deg">90.0</alpha>
                        <beta units="deg">90.0</beta>
                    </unit_cell>
                    <plane_group>P 4 2 2</plane_group>
                </crystal_parameters>
            </crystallography_processing>
        </structure_determination>
    </structure_determination_list>
    <map format="CCP4" size_kbytes="29161">
        <file>emd_2973.map.gz</file>
        <symmetry>
            <space_group>89</space_group>
        </symmetry>
        <data_type>IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)</data_type>
        <dimensions>
            <col>360</col>
            <row>144</row>
            <sec>144</sec>
        </dimensions>
        <origin>
            <col>0</col>
            <row>0</row>
            <sec>0</sec>
        </origin>
        <spacing>
            <x>144</x>
            <y>144</y>
            <z>360</z>
        </spacing>
        <cell>
            <a units="&#8491;">66.4992</a>
            <b units="&#8491;">66.4992</b>
            <c units="&#8491;">159.98401</c>
            <alpha units="deg">90.0</alpha>
            <beta units="deg">90.0</beta>
            <gamma units="deg">90.0</gamma>
        </cell>
        <axis_order>
            <fast>Z</fast>
            <medium>Y</medium>
            <slow>X</slow>
        </axis_order>
        <statistics>
            <minimum>-5.73697138</minimum>
            <maximum>7.43581915</maximum>
            <average>0.0</average>
            <std>1.0</std>
        </statistics>
        <pixel_spacing>
            <x units="&#8491;">0.46179998</x>
            <y units="&#8491;">0.46179998</y>
            <z units="&#8491;">0.4444</z>
        </pixel_spacing>
        <contour_list>
            <contour primary="true">
                <level>1.0</level>
                <source>AUTHOR</source>
            </contour>
        </contour_list>
        <annotation_details>complete unit cell. AQP0 2Fo-Fc map</annotation_details>
        <details>::::EMDATABANK.org::::EMD-2973::::</details>
    </map>
    <interpretation>
        <figure_list>
            <figure>
                <file>emd_2973.jpg</file>
            </figure>
        </figure_list>
        <segmentation_list>
            <segmentation>
                <file>emd_2973_msk_1.map</file>
                <mask_details format="CCP4" size_kbytes="9272">
                    <file>emd_2973_msk_1.map</file>
                    <symmetry>
                        <space_group>1</space_group>
                    </symmetry>
                    <data_type>IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)</data_type>
                    <dimensions>
                        <col>155</col>
                        <row>132</row>
                        <sec>116</sec>
                    </dimensions>
                    <origin>
                        <col>-20</col>
                        <row>-27</row>
                        <sec>51</sec>
                    </origin>
                    <spacing>
                        <x>132</x>
                        <y>116</y>
                        <z>155</z>
                    </spacing>
                    <cell>
                        <a units="&#8491;">53.5688</a>
                        <b units="&#8491;">60.9576</b>
                        <c units="&#8491;">68.882</c>
                        <alpha units="deg">90.0</alpha>
                        <beta units="deg">90.0</beta>
                        <gamma units="deg">90.0</gamma>
                    </cell>
                    <axis_order>
                        <fast>Z</fast>
                        <medium>Y</medium>
                        <slow>X</slow>
                    </axis_order>
                    <statistics>
                        <minimum>-5.73697138</minimum>
                        <maximum>7.43581915</maximum>
                        <average>0.00052244</average>
                        <std>1.11550629</std>
                    </statistics>
                    <pixel_spacing>
                        <x units="&#8491;">0.4618</x>
                        <y units="&#8491;">0.4618</y>
                        <z units="&#8491;">0.4444</z>
                    </pixel_spacing>
                    <annotation_details>2Fo-Fc map of AQP0 determined by electron crystallography - asymmetric unit only</annotation_details>
                    <details>::::EMDATABANK.org::::</details>
                </mask_details>
            </segmentation>
        </segmentation_list>
    </interpretation>
</emd>
