<emd emdb_id="EMD-5389" 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>RCSB</processing_site>
        </current_status>
        <sites>
            <deposition>RCSB</deposition>
            <last_processing>RCSB</last_processing>
        </sites>
        <key_dates>
            <deposition>2012-02-06</deposition>
            <header_release>2012-02-10</header_release>
            <map_release>2013-04-03</map_release>
            <update>2013-04-10</update>
        </key_dates>
        <title>An RNA Degradation Machine Sculpted by Ro Autoantigen and Noncoding RNA</title>
        <authors_list>
            <author>Chen X</author>
            <author>Taylor DW</author>
            <author>Wang HW</author>
            <author>Wolin SL</author>
        </authors_list>
        <keywords>exonuclease, Y RNA, degradation machine</keywords>
    </admin>
    <crossreferences>
        <citation_list>
            <primary_citation>
                <journal_citation published="true">
                    <author order="1">Chen X</author>
                    <author order="2">Taylor DW</author>
                    <author order="3">Fowler CC</author>
                    <author order="4">Galan JE</author>
                    <author order="5">Wang HW</author>
                    <author order="6">Wolin SL</author>
                    <title>An RNA degradation machine sculpted by Ro autoantigen and noncoding RNA.</title>
                    <journal>CELL(CAMBRIDGE,MASS.)</journal>
                    <volume>153</volume>
                    <first_page>166</first_page>
                    <last_page>177</last_page>
                    <year>2013</year>
                    <external_references type="PUBMED">23540697</external_references>
                    <external_references type="DOI">doi:10.1016/j.cell.2013.02.037</external_references>
                </journal_citation>
            </primary_citation>
        </citation_list>
    </crossreferences>
    <sample>
        <name>Rsr/Y RNA/PNPase complex</name>
        <supramolecule_list>
            <sample_supramolecule supramolecule_id="1000">
                <name>Rsr/Y RNA/PNPase complex</name>
                <details>The sample was monodisperse and homogeneous.</details>
                <oligomeric_state>one Rsr-Y RNA complex binds to one PNPase trimer</oligomeric_state>
                <number_unique_components>3</number_unique_components>
                <molecular_weight>
                    <experimental units="MDa">0.375</experimental>
                    <theoretical units="MDa">0.365</theoretical>
                    <method>glycerol gradient</method>
                </molecular_weight>
            </sample_supramolecule>
        </supramolecule_list>
        <macromolecule_list>
            <protein_or_peptide macromolecule_id="1">
                <name synonym="Rsr, Ro 60 kDa autoantigen">Ro sixty-related</name>
                <natural_source database="NCBI">
                    <organism ncbi="1299">Deinococcus radiodurans</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.062</theoretical>
                </molecular_weight>
                <details>His-tag Rsr</details>
                <number_of_copies>1</number_of_copies>
                <oligomeric_state>monomer</oligomeric_state>
                <recombinant_exp_flag>true</recombinant_exp_flag>
                <recombinant_expression database="NCBI">
                    <recombinant_organism ncbi="562">Escherichia coli</recombinant_organism>
                    <recombinant_plasmid>RSFDuet-1</recombinant_plasmid>
                </recombinant_expression>
                <sequence />
            </protein_or_peptide>
            <rna macromolecule_id="2">
                <name>Y RNA</name>
                <natural_source database="NCBI">
                    <organism ncbi="1299">Deinococcus radiodurans</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.042</theoretical>
                </molecular_weight>
                <details>Y RNA generated with correct 3' end using hammerhead ribozyme</details>
                <classification>OTHER</classification>
                <structure>OTHER</structure>
                <synthetic_flag>false</synthetic_flag>
            </rna>
            <protein_or_peptide macromolecule_id="3">
                <name synonym="PNPase">polynucleotide phosphorylase</name>
                <natural_source database="NCBI">
                    <organism ncbi="1299">Deinococcus radiodurans</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.262</theoretical>
                </molecular_weight>
                <details>Strep-tag PNPase</details>
                <number_of_copies>3</number_of_copies>
                <oligomeric_state>Trimer</oligomeric_state>
                <recombinant_exp_flag>true</recombinant_exp_flag>
                <recombinant_expression database="NCBI">
                    <recombinant_organism ncbi="562">Escherichia coli</recombinant_organism>
                    <recombinant_plasmid>RSFDuet-1</recombinant_plasmid>
                </recombinant_expression>
                <sequence />
            </protein_or_peptide>
        </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">0.1</concentration>
                    <buffer>
                        <ph>7.5</ph>
                        <details>20 mM HEPES, 50 mM NaCl, 2 mM beta-mercaptoethanol, 1 mM MgCl2, 1 mM MnCl2, 1 mM Petabloc</details>
                    </buffer>
                    <staining>
                        <type>NEGATIVE</type>
                        <details>Grids with adsorbed protein were stained consecutively with 3 droplets of 2% w/v uranyl acetate for 10 seconds each.</details>
                    </staining>
                    <grid>
                        <details>Homemade holey carbon grids with a thin layer of carbon over the holes</details>
                    </grid>
                    <vitrification>
                        <cryogen_name>NONE</cryogen_name>
                        <instrument>OTHER</instrument>
                    </vitrification>
                </single_particle_preparation>
            </specimen_preparation_list>
            <microscopy_list>
                <single_particle_microscopy microscopy_id="1">
                    <microscope>FEI TECNAI 12</microscope>
                    <illumination_mode>FLOOD BEAM</illumination_mode>
                    <imaging_mode>BRIGHT FIELD</imaging_mode>
                    <electron_source>LAB6</electron_source>
                    <acceleration_voltage units="kV">120</acceleration_voltage>
                    <nominal_cs units="mm">2.3</nominal_cs>
                    <nominal_defocus_min units="&#181;m">0.8</nominal_defocus_min>
                    <nominal_defocus_max units="&#181;m">1.2</nominal_defocus_max>
                    <nominal_magnification>49000.0</nominal_magnification>
                    <specimen_holder_model>OTHER</specimen_holder_model>
                    <alignment_procedure>
                        <legacy>
                            <astigmatism>object lens astigmatism was corrected at 42,000 magnification</astigmatism>
                        </legacy>
                    </alignment_procedure>
                    <date>2009-07-12</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>40</number_real_images>
                            <average_electron_dose_per_image units="e/&#8491;^2">20</average_electron_dose_per_image>
                        </image_recording>
                    </image_recording_list>
                </single_particle_microscopy>
            </microscopy_list>
            <singleparticle_processing image_processing_id="1">
                <details>The particles were selected manually using boxer in EMAN.</details>
                <ctf_correction>
                    <details>Each particle in IMAGIC</details>
                </ctf_correction>
                <final_reconstruction>
                    <algorithm>OTHER</algorithm>
                    <resolution res_type="BY AUTHOR" units="&#8491;">25.0</resolution>
                    <resolution_method>FSC 0.5 CUT-OFF</resolution_method>
                    <software_list>
                        <software>
                            <name>LEGINON, EMAN2, SPARX</name>
                        </software>
                    </software_list>
                    <number_images_used>9000</number_images_used>
                </final_reconstruction>
                <final_two_d_classification>
                    <number_classes>50</number_classes>
                </final_two_d_classification>
            </singleparticle_processing>
        </structure_determination>
    </structure_determination_list>
    <map format="CCP4" size_kbytes="1459">
        <file>emd_5389.map.gz</file>
        <symmetry>
            <space_group>1</space_group>
        </symmetry>
        <data_type>IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)</data_type>
        <dimensions>
            <col>72</col>
            <row>72</row>
            <sec>72</sec>
        </dimensions>
        <origin>
            <col>0</col>
            <row>0</row>
            <sec>0</sec>
        </origin>
        <spacing>
            <x>72</x>
            <y>72</y>
            <z>72</z>
        </spacing>
        <cell>
            <a units="&#8491;">313.92</a>
            <b units="&#8491;">313.92</b>
            <c units="&#8491;">313.92</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>-3.97276688</minimum>
            <maximum>14.19131088</maximum>
            <average>0.0</average>
            <std>0.99999869</std>
        </statistics>
        <pixel_spacing>
            <x units="&#8491;">4.36</x>
            <y units="&#8491;">4.36</y>
            <z units="&#8491;">4.36</z>
        </pixel_spacing>
        <contour_list>
            <contour primary="true">
                <level>3.67</level>
                <source>AUTHOR</source>
            </contour>
        </contour_list>
        <annotation_details>negative stain single particle reconstruction of GraFix-prepared Rsr/Y RNA/PNPase complex</annotation_details>
        <details>::::EMDATABANK.org::::EMD-5389::::</details>
    </map>
    <interpretation>
        <modelling_list>
            <modelling>
                <initial_model>
                    <access_code>1E3P</access_code>
                    <chain>
                        <chain_id>A</chain_id>
                    </chain>
                </initial_model>
                <refinement_protocol>RIGID BODY FIT</refinement_protocol>
                <software_list>
                    <software>
                        <name>Chimera</name>
                    </software>
                </software_list>
                <details>Protocol: Rigid body using Fit-in-Map. A trimer of the crystal structure of PNPase was created using COOT and used for fitting.</details>
                <target_criteria>Cross-correlation coefficient</target_criteria>
                <refinement_space>REAL</refinement_space>
            </modelling>
            <modelling>
                <initial_model>
                    <access_code>1YVP</access_code>
                    <chain>
                        <chain_id>B</chain_id>
                    </chain>
                    <chain>
                        <chain_id>E</chain_id>
                    </chain>
                    <chain>
                        <chain_id>F</chain_id>
                    </chain>
                    <chain>
                        <chain_id>H</chain_id>
                    </chain>
                </initial_model>
                <refinement_protocol>RIGID BODY FIT</refinement_protocol>
                <software_list>
                    <software>
                        <name>Chimera</name>
                    </software>
                </software_list>
                <details>Protocol: Rigid body using Fit-in-Map. Combined with the double-stranded portion of the misfolded substrate RNA from PDB 2I91.</details>
                <target_criteria>Cross-correlation coefficient</target_criteria>
                <refinement_space>REAL</refinement_space>
            </modelling>
            <modelling>
                <initial_model>
                    <access_code>2I91</access_code>
                    <chain>
                        <chain_id>C</chain_id>
                    </chain>
                    <chain>
                        <chain_id>D</chain_id>
                    </chain>
                </initial_model>
                <refinement_protocol>RIGID BODY FIT</refinement_protocol>
                <software_list>
                    <software>
                        <name>Chimera</name>
                    </software>
                </software_list>
                <details>Protocol: Rigid body using Fit-in-Map. The double-stranded portion of the misfolded substrate RNA from this structure was combined with PDB 1YVP to create a model of Rsr bound by Y RNA and a full substrate RNA with single-stranded tail.</details>
                <target_criteria>Cross-correlation coefficient</target_criteria>
                <refinement_space>REAL</refinement_space>
            </modelling>
        </modelling_list>
    </interpretation>
</emd>