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        <sites>
            <deposition>RCSB</deposition>
            <last_processing>RCSB</last_processing>
        </sites>
        <key_dates>
            <deposition>2020-08-15</deposition>
            <header_release>2020-10-21</header_release>
            <map_release>2020-10-21</map_release>
            <update>2025-05-14</update>
        </key_dates>
        <grant_support>
            <grant_reference>
                <funding_body>National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)</funding_body>
                <code>R35 GM122575</code>
                <country>United States</country>
            </grant_reference>
            <grant_reference>
                <funding_body>National Institutes of Health/National Cancer Institute (NIH/NCI)</funding_body>
                <code>R01 CA201402</code>
                <country>United States</country>
            </grant_reference>
            <grant_reference>
                <funding_body>National Institutes of Health/National Institute of Neurological Disorders and Stroke (NIH/NINDS)</funding_body>
                <code>R01 NS092695</code>
                <country>United States</country>
            </grant_reference>
        </grant_support>
        <title>Structure of the Visual Signaling Complex between Transducin and Phosphodiesterase 6</title>
        <authors_list>
            <author>Gao Y</author>
            <author>Eskici G</author>
        </authors_list>
        <keywords>G protein, G protein-effector complex, Transducin, phosphodiesterase 6, phototransduction, GPCR signaling, SIGNALING PROTEIN</keywords>
    </admin>
    <crossreferences>
        <citation_list>
            <primary_citation>
                <journal_citation published="true">
                    <author order="1">Gao Y</author>
                    <author order="2">Eskici G</author>
                    <author order="3">Ramachandran S</author>
                    <author order="4">Poitevin F</author>
                    <author order="5">Seven AB</author>
                    <author order="6">Panova O</author>
                    <author order="7">Skiniotis G</author>
                    <author order="8">Cerione RA</author>
                    <title>Structure of the Visual Signaling Complex between Transducin and Phosphodiesterase 6.</title>
                    <journal_abbreviation>Mol.Cell</journal_abbreviation>
                    <country>US</country>
                    <volume>80</volume>
                    <first_page>237</first_page>
                    <year>2020</year>
                    <external_references type="PUBMED">33007200</external_references>
                    <external_references type="DOI">doi:10.1016/j.molcel.2020.09.013</external_references>
                    <external_references type="ISSN">1097-2765</external_references>
                    <external_references type="CSD">2168</external_references>
                    <external_references type="ASTM">MOCEFL</external_references>
                </journal_citation>
            </primary_citation>
        </citation_list>
        <pdb_list>
            <pdb_reference>
                <pdb_id>7jsn</pdb_id>
                <relationship>
                    <in_frame>FULLOVERLAP</in_frame>
                </relationship>
            </pdb_reference>
        </pdb_list>
    </crossreferences>
    <sample>
        <name>Complex of Transducin and Phosphodiesterase 6</name>
        <supramolecule_list>
            <complex_supramolecule supramolecule_id="1">
                <name>Complex of Transducin and Phosphodiesterase 6</name>
                <parent>0</parent>
                <macromolecule_list>
                    <macromolecule>
                        <macromolecule_id>1</macromolecule_id>
                    </macromolecule>
                    <macromolecule>
                        <macromolecule_id>2</macromolecule_id>
                    </macromolecule>
                    <macromolecule>
                        <macromolecule_id>3</macromolecule_id>
                    </macromolecule>
                    <macromolecule>
                        <macromolecule_id>4</macromolecule_id>
                    </macromolecule>
                </macromolecule_list>
                <molecular_weight>
                    <theoretical units="MDa">0.3</theoretical>
                </molecular_weight>
            </complex_supramolecule>
            <complex_supramolecule supramolecule_id="2">
                <name>Rod cGMP-specific 3',5'-cyclic phosphodiesterase subunit alpha (E.C.3.1.4.35), Rod cGMP-specific 3',5'-cyclic phosphodiesterase subunit beta (E.C.3.1.4.35), Retinal rod rhodopsin-sensitive cGMP 3',5'-cyclic phosphodiesterase subunit gamma (E.C.3.1.4.35)</name>
                <parent>1</parent>
                <macromolecule_list>
                    <macromolecule>
                        <macromolecule_id>1</macromolecule_id>
                    </macromolecule>
                    <macromolecule>
                        <macromolecule_id>2</macromolecule_id>
                    </macromolecule>
                    <macromolecule>
                        <macromolecule_id>3</macromolecule_id>
                    </macromolecule>
                </macromolecule_list>
                <natural_source database="NCBI">
                    <organism ncbi="9913">Bos taurus</organism>
                </natural_source>
            </complex_supramolecule>
            <complex_supramolecule supramolecule_id="3">
                <name>Guanine nucleotide-binding protein G(t) subunit alpha-1, Guanine nucleotide-binding protein G(i) subunit alpha-1 chimera,Gt-alpha/Gi1-alpha chimera</name>
                <parent>1</parent>
                <macromolecule_list>
                    <macromolecule>
                        <macromolecule_id>4</macromolecule_id>
                    </macromolecule>
                </macromolecule_list>
                <natural_source database="NCBI">
                    <organism ncbi="9913">Bos taurus</organism>
                </natural_source>
            </complex_supramolecule>
        </supramolecule_list>
        <macromolecule_list>
            <protein_or_peptide macromolecule_id="1">
                <name>Rod cGMP-specific 3',5'-cyclic phosphodiesterase subunit alpha</name>
                <natural_source database="NCBI">
                    <organism ncbi="9913">Bos taurus</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.099461789</theoretical>
                </molecular_weight>
                <number_of_copies>1</number_of_copies>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>MGEVTAEEVEKFLDSNVSFAKQYYNLRYRAKVISDLLGPREAAVDFSNYHALNSVEESEIIFDLLRDFQDNLQAEKCVFN
VMKKLCFLLQADRMSLFMYRARNGIAELATRLFNVHKDAVLEECLVAPDSEIVFPLDMGVVGHVALSKKIVNVPNTEEDE
HFCDFVDTLTEYQTKNILASPIMNGKDVVAIIMVVNKVDGPHFTENDEEILLKYLNFANLIMKVFHLSYLHNCETRRGQI
LLWSGSKVFEELTDIERQFHKALYTVRAFLNCDRYSVGLLDMTKQKEFFDVWPVLMGEAPPYAGPRTPDGREINFYKVID
YILHGKEDIKVIPNPPPDHWALVSGLPTYVAQNGLICNIMNAPSEDFFAFQKEPLDESGWMIKNVLSMPIVNKKEEIVGV
ATFYNRKDGKPFDEMDETLMESLTQFLGWSVLNPDTYELMNKLENRKDIFQDMVKYHVKCDNEEIQTILKTREVYGKEPW
ECEEEELAEILQGELPDADKYEINKFHFSDLPLTELELVKCGIQMYYELKVVDKFHIPQEALVRFMYSLSKGYRRITYHN
WRHGFNVGQTMFSLLVTGKLKRYFTDLEALAMVTAAFCHDIDHRGTNNLYQMKSQNPLAKLHGSSILERHHLEFGKTLLR
DESLNIFQNLNRRQHEHAIHMMDIAIIATDLALYFKKRTMFQKIVDQSKTYETQQEWTQYMMLDQTRKEIVMAMMMTACD
LSAITKPWEVQSKVALLVAAEFWEQGDLERTVLQQNPIPMMDRNKADELPKLQVGFIDFVCTFVYKEFSRFHEEITPMLD
GITNNRKEWKALADEYETKMKGLEEEKQKQQAANQAAAGSQHGGKQPGGGPASKSCCVQ</string>
                    <external_references type="UNIPROTKB">P11541</external_references>
                </sequence>
                <ec_number>3.1.4.35</ec_number>
            </protein_or_peptide>
            <protein_or_peptide macromolecule_id="2">
                <name>Rod cGMP-specific 3',5'-cyclic phosphodiesterase subunit beta</name>
                <natural_source database="NCBI">
                    <organism ncbi="9913">Bos taurus</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.098449648</theoretical>
                </molecular_weight>
                <number_of_copies>1</number_of_copies>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>MSLSEGQVHRFLDQNPGFADQYFGRKLSPEDVANACEDGCPEGCTSFRELCQVEESAALFELVQDMQENVNMERVVFKIL
RRLCSILHADRCSLFMYRQRNGVAELATRLFSVQPDSVLEDCLVPPDSEIVFPLDIGVVGHVAQTKKMVNVQDVMECPHF
SSFADELTDYVTRNILATPIMNGKDVVAVIMAVNKLDGPCFTSEDEDVFLKYLNFGTLNLKIYHLSYLHNCETRRGQVLL
WSANKVFEELTDIERQFHKAFYTVRAYLNCDRYSVGLLDMTKEKEFFDVWPVLMGEAQAYSGPRTPDGREILFYKVIDYI
LHGKEDIKVIPSPPADHWALASGLPTYVAESGFICNIMNAPADEMFNFQEGPLDDSGWIVKNVLSMPIVNKKEEIVGVAT
FYNRKDGKPFDEQDEVLMESLTQFLGWSVLNTDTYDKMNKLENRKDIAQDMVLYHVRCDREEIQLILPTRERLGKEPADC
EEDELGKILKEVLPGPAKFDIYEFHFSDLECTELELVKCGIQMYYELGVVRKFQIPQEVLVRFLFSVSKGYRRITYHNWR
HGFNVAQTMFTLLMTGKLKSYYTDLEAFAMVTAGLCHDIDHRGTNNLYQMKSQNPLAKLHGSSILERHHLEFGKFLLSEE
TLNIYQNLNRRQHEHVIHLMDIAIIATDLALYFKKRTMFQKIVDESKNYEDRKSWVEYLSLETTRKEIVMAMMMTACDLS
AITKPWEVQSKVALLVAAEFWEQGDLERTVLDQQPIPMMDRNKAAELPKLQVGFIDFVCTFVYKEFSRFHEEILPMFDRL
QNNRKEWKALADEYEAKVKALEEDQKKETTAKKVGTEICNGGPAPRSSTCRIL</string>
                    <external_references type="UNIPROTKB">P23439</external_references>
                </sequence>
                <ec_number>3.1.4.35</ec_number>
            </protein_or_peptide>
            <protein_or_peptide macromolecule_id="3">
                <name>Guanine nucleotide-binding protein G(t) subunit alpha-1, Guanine nucleotide-binding protein G(i) subunit alpha-1 chimera</name>
                <natural_source database="NCBI">
                    <organism ncbi="9913">Bos taurus</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.042218035</theoretical>
                </molecular_weight>
                <number_of_copies>2</number_of_copies>
                <recombinant_expression database="NCBI">
                    <recombinant_organism ncbi="562">Escherichia coli</recombinant_organism>
                </recombinant_expression>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>MAHHHHHHAMGAGASAEEKHSRELEKKLKEDAEKDARTVKLLLLGAGESGKSTIVKQMKIIHQDGYSLEECLEFIAIIYG
NTLQSILAIVRAMTTLNIQYGDSARQDDARKLMHMADTIEEGTMPKEMSDIIQRLWKDSGIQACFDRASEYQLNDSAGYY
LSDLERLVTPGYVPTEQDVLRSCVKTTGIIETQFSFKDLNFRMFDVGGLRSERKKWIHCFEGVTAIIFCVALSDYDMVLV
EDDEVNRMHESMHLFNSICNNKWFTDTSIILFLNKKDLFEEKIKKSPLSICFPDYAGSNTYEEAGNYIKVQFLELNMRRD
VKEIYSHMTCATDTQNVKFVFDAVTDIIIKENLKDCGLFAAATETSQVAPA</string>
                    <external_references type="UNIPROTKB">P04695</external_references>
                    <external_references type="UNIPROTKB">P04695</external_references>
                </sequence>
            </protein_or_peptide>
            <protein_or_peptide macromolecule_id="4">
                <name>Retinal rod rhodopsin-sensitive cGMP 3',5'-cyclic phosphodiesterase subunit gamma</name>
                <natural_source database="NCBI">
                    <organism ncbi="9913">Bos taurus</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.009684228999999999</theoretical>
                </molecular_weight>
                <number_of_copies>2</number_of_copies>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>MNLEPPKAEIRSATRVMGGPVTPRKGPPKFKQRQTRQFKSKPPKKGVQGFGDDIPGMEGLGTDITVICPWEAFNHLELHE
LAQYGII</string>
                    <external_references type="UNIPROTKB">P04972</external_references>
                </sequence>
                <ec_number>3.1.4.35</ec_number>
            </protein_or_peptide>
            <ligand macromolecule_id="5">
                <name>ZINC ION</name>
                <molecular_weight>
                    <theoretical units="MDa">6.5409e-05</theoretical>
                </molecular_weight>
                <number_of_copies>2</number_of_copies>
                <formula>ZN</formula>
            </ligand>
            <ligand macromolecule_id="6">
                <name>MAGNESIUM ION</name>
                <molecular_weight>
                    <theoretical units="MDa">2.4305e-05</theoretical>
                </molecular_weight>
                <number_of_copies>2</number_of_copies>
                <formula>MG</formula>
            </ligand>
            <ligand macromolecule_id="7">
                <name>2-{2-ETHOXY-5-[(4-ETHYLPIPERAZIN-1-YL)SULFONYL]PHENYL}-5-METHYL-7-PROPYLIMIDAZO[5,1-F][1,2,4]TRIAZIN-4(1H)-ONE</name>
                <molecular_weight>
                    <theoretical units="MDa">0.000488603</theoretical>
                </molecular_weight>
                <number_of_copies>2</number_of_copies>
                <formula>VDN</formula>
            </ligand>
            <ligand macromolecule_id="8">
                <name>GUANOSINE-3',5'-MONOPHOSPHATE</name>
                <molecular_weight>
                    <theoretical units="MDa">0.00034520499999999996</theoretical>
                </molecular_weight>
                <number_of_copies>2</number_of_copies>
                <formula>35G</formula>
            </ligand>
            <ligand macromolecule_id="9">
                <name>GUANOSINE-5'-TRIPHOSPHATE</name>
                <molecular_weight>
                    <theoretical units="MDa">0.0005231799999999999</theoretical>
                </molecular_weight>
                <number_of_copies>2</number_of_copies>
                <formula>GTP</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</concentration>
                    <buffer>
                        <ph>8.0</ph>
                        <details>20 mM Tris pH 8.0, 5 mM MgCl2 and 1 uM vardenafil</details>
                    </buffer>
                    <grid>
                        <model>Quantifoil R1.2/1.3</model>
                        <material>GOLD</material>
                        <pretreatment>
                            <type>GLOW DISCHARGE</type>
                        </pretreatment>
                    </grid>
                    <vitrification>
                        <cryogen_name>ETHANE</cryogen_name>
                        <chamber_humidity units="percentage">100</chamber_humidity>
                        <chamber_temperature units="K">295</chamber_temperature>
                        <instrument>FEI VITROBOT MARK IV</instrument>
                    </vitrification>
                    <details>0.05% octyl glucoside was used as an additive.</details>
                </single_particle_preparation>
            </specimen_preparation_list>
            <microscopy_list>
                <single_particle_microscopy microscopy_id="1">
                    <microscope>FEI TITAN KRIOS</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>
                    <image_recording_list>
                        <image_recording image_recording_id="1">
                            <film_or_detector_model>GATAN K3 (6k x 4k)</film_or_detector_model>
                            <average_exposure_time units="s">4.0</average_exposure_time>
                            <average_electron_dose_per_image units="e/Å^2">48.0</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>
                <ctf_correction>
                    <type>PHASE FLIPPING AND AMPLITUDE CORRECTION</type>
                </ctf_correction>
                <startup_model type_of_model="EMDB MAP"/>
                <final_reconstruction>
                    <applied_symmetry>
                        <point_group>C1</point_group>
                    </applied_symmetry>
                    <resolution units="Å" res_type="BY AUTHOR">3.2</resolution>
                    <resolution_method>FSC 0.143 CUT-OFF</resolution_method>
                    <number_images_used>143125</number_images_used>
                </final_reconstruction>
                <initial_angle_assignment>
                    <type>PROJECTION MATCHING</type>
                    <projection_matching_processing/>
                </initial_angle_assignment>
                <final_angle_assignment>
                    <type>MAXIMUM LIKELIHOOD</type>
                </final_angle_assignment>
            </singleparticle_processing>
        </structure_determination>
    </structure_determination_list>
    <map format="CCP4" size_kbytes="131073">
        <file>emd_22458.map.gz</file>
        <symmetry>
            <space_group>1</space_group>
        </symmetry>
        <data_type>IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)</data_type>
        <dimensions>
            <col>320</col>
            <row>320</row>
            <sec>320</sec>
        </dimensions>
        <origin>
            <col>0</col>
            <row>0</row>
            <sec>0</sec>
        </origin>
        <spacing>
            <x>320</x>
            <y>320</y>
            <z>320</z>
        </spacing>
        <cell>
            <a units="Å">272.0</a>
            <b units="Å">272.0</b>
            <c units="Å">272.0</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>-0.002930495</minimum>
            <maximum>0.059562024</maximum>
            <average>0.000012298156</average>
            <std>0.0018455955</std>
        </statistics>
        <pixel_spacing>
            <x units="Å">0.85</x>
            <y units="Å">0.85</y>
            <z units="Å">0.85</z>
        </pixel_spacing>
        <contour_list>
            <contour primary="true">
                <level>0.007</level>
                <source>AUTHOR</source>
            </contour>
        </contour_list>
        <label>::::EMDATABANK.org::::EMD-22458::::</label>
        <annotation_details>Visual Signaling Complex between Transducin and Phosphodiesterase 6</annotation_details>
    </map>
    <interpretation>
        <modelling_list>
            <modelling>
                <refinement_protocol>BACKBONE TRACE</refinement_protocol>
            </modelling>
        </modelling_list>
    </interpretation>
</emd>
