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        <current_status>
            <date>2026-08-12</date>
            <code>REL</code>
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                        <provider>REPOSITORY</provider>
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                        <revision_group>EXPERIMENTAL_SUMMARY</revision_group>
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            <revision version="2.0" date="2026-08-12">
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                    <model>
                        <revision_type>REMEDIATION</revision_type>
                        <provider>REPOSITORY</provider>
                        <description>Metalloprotein remediation</description>
                        <revision_group>STRUCTURE_SUMMARY</revision_group>
                        <categories>
                            <category>chem_comp</category>
                            <category>chem_comp_atom</category>
                            <category>em_admin</category>
                            <category>pdbx_modification_feature</category>
                            <category>pdbx_nonpoly_atom_coordination</category>
                            <category>pdbx_validate_chiral</category>
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        <sites>
            <deposition>RCSB</deposition>
            <last_processing>RCSB</last_processing>
        </sites>
        <key_dates>
            <deposition>2020-02-04</deposition>
            <header_release>2020-03-04</header_release>
            <map_release>2021-08-04</map_release>
            <update>2026-08-12</update>
        </key_dates>
        <title>Trimeric Photosystem I from the High-Light Tolerant Cyanobacteria Cyanobacterium Aponinum</title>
        <authors_list>
            <author>Dobson Z</author>
            <author>Toporik H</author>
        </authors_list>
        <keywords>Photosystem I, Membrane Protein, Photosynthesis, PSI</keywords>
    </admin>
    <crossreferences>
        <citation_list>
            <primary_citation>
                <journal_citation published="true">
                    <author order="1">Dobson Z</author>
                    <author order="2">Ahad S</author>
                    <author order="3">Vanlandingham J</author>
                    <author order="4">Toporik H</author>
                    <author order="5">Vaughn N</author>
                    <author ORCID="0000-0001-9357-094X" order="6">Vaughn M</author>
                    <author order="7">Williams D</author>
                    <author order="8">Reppert M</author>
                    <author order="9">Fromme P</author>
                    <author ORCID="0000-0001-5072-0928" order="10">Mazor Y</author>
                    <title>The structure of photosystem I from a high-light tolerant Cyanobacteria.</title>
                    <journal_abbreviation>Elife</journal_abbreviation>
                    <country>US</country>
                    <volume>10</volume>
                    <year>2021</year>
                    <external_references type="PUBMED">34435952</external_references>
                    <external_references type="DOI">doi:10.7554/eLife.67518</external_references>
                    <external_references type="ISSN">2050-084X</external_references>
                </journal_citation>
            </primary_citation>
        </citation_list>
        <pdb_list>
            <pdb_reference>
                <pdb_id>6vpv</pdb_id>
                <relationship>
                    <in_frame>FULLOVERLAP</in_frame>
                </relationship>
            </pdb_reference>
        </pdb_list>
        <other_db_list>
            <db_reference>
                <db_name>PDB</db_name>
                <accession_id>1JB0</accession_id>
                <content_type>unspecified</content_type>
                <details>Cyanobacterial PSI</details>
            </db_reference>
            <db_reference>
                <db_name>PDB</db_name>
                <accession_id>5OY0</accession_id>
                <content_type>unspecified</content_type>
                <details>Cyanobacterial PSI</details>
            </db_reference>
            <db_reference>
                <db_name>EMDB</db_name>
                <accession_id>EMD-21320</accession_id>
                <content_type>associated EM volume</content_type>
                <details>Trimeric Photosystem I from the High-Light Tolerant Cyanobacteria Cyanobacterium aponinum</details>
            </db_reference>
        </other_db_list>
    </crossreferences>
    <sample>
        <name>Trimeric PSI from a High Light tolerant cyanobacteria, Cyanobacterium aponinum</name>
        <supramolecule_list>
            <complex_supramolecule supramolecule_id="1">
                <name>Trimeric PSI from a High Light tolerant cyanobacteria, Cyanobacterium aponinum</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>
                        <macromolecule_id>5</macromolecule_id>
                    </macromolecule>
                    <macromolecule>
                        <macromolecule_id>6</macromolecule_id>
                    </macromolecule>
                    <macromolecule>
                        <macromolecule_id>7</macromolecule_id>
                    </macromolecule>
                    <macromolecule>
                        <macromolecule_id>8</macromolecule_id>
                    </macromolecule>
                    <macromolecule>
                        <macromolecule_id>9</macromolecule_id>
                    </macromolecule>
                    <macromolecule>
                        <macromolecule_id>10</macromolecule_id>
                    </macromolecule>
                    <macromolecule>
                        <macromolecule_id>11</macromolecule_id>
                    </macromolecule>
                </macromolecule_list>
                <natural_source database="NCBI">
                    <organism ncbi="2676140">Cyanobacterium aponinum 0216</organism>
                    <strain>0216</strain>
                </natural_source>
            </complex_supramolecule>
        </supramolecule_list>
        <macromolecule_list>
            <protein_or_peptide macromolecule_id="1">
                <name>Photosystem I P700 chlorophyll a apoprotein A1</name>
                <natural_source database="NCBI">
                    <organism ncbi="2676140">Cyanobacterium aponinum 0216</organism>
                    <strain>0216</strain>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.081754039</theoretical>
                </molecular_weight>
                <number_of_copies>3</number_of_copies>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>KAKVIVDKDPVPTSFEKWGKPGHFDRTLARGPKTTTWIWNLHADAHDFDSQTSDLEDISRKIFSAHFGHLAVVFVWLSGM
YFHGAKFSNYSAWLADPLNIKPSAQVVWPVVGQDILNADVGGGFHGIQITSGFFQLWRASGITNEYQLYCTAIGGLVMAG
LMLFAGWFHYHKAAPKLEWFQNVESMMNHHLAGLLGLGSLGWAGHQIHVSLPINKLLDAGVAPNEIPLPHEFILDPAKMA
ELYPSFAQGLTPFFTLNWGVYSDFLTFKGGLNPVTGGLWLSDTAHHHLAIAVLFIIAGHMYRTNWGIGHNMKEILEGHKG
PFTGEGHKGLYEILTTSWHAQLAINLALLGSLTIIVAQHMYAMPPYPYLATDYGTQLSIFTHHMWIGGFLIVGAGAHASI
FMVRDYDPAKNVNNLLDRVLRHRDAIISHLNWVCIWLGFHSFGLYIHNDTMRALGRPQDMFSDSAIQLQPVFAQWIQGLH
AAAAGATAPFASAGVSPVFGGEVVAVGGKVAMMPITLGTADFMVHHIHAFTIHVTVLILLKGVLYSRSSRLIPDKAELGF
RFPCDGPGRGGTCQVSGWDHVFLGLFWMYNSLSIVIFHFSWKMQSDVWGTVLPDGSVSHITGGNFAQSAITINGWLRDFL
WAQAANVINSYGSALSAYGIMFLAGHFVFAFSLMFLFSGRGYWQELIESIVWAHNKLKLAPAIQPRALSIVQGRAVGVAH
YLLGGIVTTWAFFLCRILSVG</string>
                    <external_references type="UNIPROTKB">A0A2G3P9X3</external_references>
                </sequence>
                <ec_number>1.97.1.12</ec_number>
            </protein_or_peptide>
            <protein_or_peptide macromolecule_id="2">
                <name>Photosystem I P700 chlorophyll a apoprotein A2</name>
                <natural_source database="NCBI">
                    <organism ncbi="2676140">Cyanobacterium aponinum 0216</organism>
                    <strain>0216</strain>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.08186594500000001</theoretical>
                </molecular_weight>
                <number_of_copies>3</number_of_copies>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>ATKFPKFSQDLAQDPTTRRIWYGIATAHDFETHDGMTEENLYQKIFASHFGHLAIIFLWTSGTVFHVAWQGNFEQWIKDP
LNVRPIAHAIWDPHFGQGAVDAFTQAGASSPVNVAYSGVYHWFYTIGMTNNQDLYQGAVFLLILSALFLFAGWLHLQPKF
RPSLSWFKNAESRLNHHLAGLFGVSSLAWTGHLVHVAIPESRGVHVGWDNFLSVKPHPAGLAPFFTGNWGVYAQNPDTAS
HVFGTSEGAGSAILTFLGGFHPQTESLWLTDIAHHHLAIAVIFIVAGHMYRTNWGIGHSIKDILAAHNPPQGTPFGGALG
AGHRGLYDTINNSLHFQLGLALASLGVITSLVAQHMYSLPSYAFIAKDYTTQAALYTHHQYIAGFLMVGAFAHGAIFFVR
DYDPEANKDNVLARMLEHKEAIISHLSWVSLFLGFHTLGLYVHNDVVVAFGTPEKQILIEPVFAQFVQAASGKALYGFDA
LLSNPDSVASTASAVWLPGWLDAINSGTNSLFLNIGPGDFLVHHAIALGLHTTTLILVKGALDARGSKLMPDKKDFGFSF
PCDGPGRGGTCDISAWDAFYLAMFWMLNTLGWLTFYWHWKHLGIWTGNVAQFNENSTYLMGWFRDYLWANSAQLINGYNP
YGVNNLSVWAWMFLFGHLVWATGFMFLISWRGYWQELIETIVWAHERTPLANLVRWKDKPVALSIVQARLVGLAHFTVGY
ILTYAAFLIASTAGKFG</string>
                    <external_references type="UNIPROTKB">K9Z2J7</external_references>
                </sequence>
                <ec_number>1.97.1.12</ec_number>
            </protein_or_peptide>
            <protein_or_peptide macromolecule_id="3">
                <name>Photosystem I iron-sulfur center</name>
                <natural_source database="NCBI">
                    <organism ncbi="2676140">Cyanobacterium aponinum 0216</organism>
                    <strain>0216</strain>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.008692039</theoretical>
                </molecular_weight>
                <number_of_copies>3</number_of_copies>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>SHSVKIYDTCIGCTQCVRACPLDVLEMVPWDGCKAGQIASSPRTEDCVGCKRCETACPTDFLSIRVYLGAETTRSMGLAY</string>
                    <external_references type="UNIPROTKB">A0A2G3PD04</external_references>
                </sequence>
                <ec_number>1.97.1.12</ec_number>
            </protein_or_peptide>
            <protein_or_peptide macromolecule_id="4">
                <name>Photosystem I reaction center subunit II</name>
                <natural_source database="NCBI">
                    <organism ncbi="2676140">Cyanobacterium aponinum 0216</organism>
                    <strain>0216</strain>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.015647748</theoretical>
                </molecular_weight>
                <number_of_copies>3</number_of_copies>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>IQLTGTMPKFGGSTGGLLSAADREEKYAITWTSKTEQVFEMPTGGAAIMNEGENLLYFARKEQCLALGTQLRTKFKPKIE
DYKIYRIYPTGETQYLHPADGVFPEKVNEGREFHGKKDRNIGKNPEPVTLKFSGKTPYD</string>
                    <external_references type="UNIPROTKB">A0A2G3PAQ0</external_references>
                </sequence>
            </protein_or_peptide>
            <protein_or_peptide macromolecule_id="5">
                <name>Photosystem I reaction center subunit IV</name>
                <natural_source database="NCBI">
                    <organism ncbi="2676140">Cyanobacterium aponinum 0216</organism>
                    <strain>0216</strain>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.007634533999999999</theoretical>
                </molecular_weight>
                <number_of_copies>3</number_of_copies>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>AIQRGSKVRILRKESYWYKDVGTVASVDKSGILYPVIVRFDKVNYNGFSGSATGVNTNNFAEHELEEV</string>
                    <external_references type="UNIPROTKB">A0A2G3PEU8</external_references>
                </sequence>
            </protein_or_peptide>
            <protein_or_peptide macromolecule_id="6">
                <name>PSI-F</name>
                <natural_source database="NCBI">
                    <organism ncbi="2676140">Cyanobacterium aponinum 0216</organism>
                    <strain>0216</strain>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.015665844999999998</theoretical>
                </molecular_weight>
                <number_of_copies>3</number_of_copies>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>DLSHLTPCSESPAYQAKAKSFRNTTSDPESGQKRAESYAEALCGPEGYPHLVVDGRLDHAGDFIIPGLLFLYVAGWIGWV
GRSYLIAIREEKDTEMKEIIIDVPLAINKMLFGFMWPLQAFGEFTSGKLTVKDSEIPVSPR</string>
                    <external_references type="UNIPROTKB">A0A2G3PEV5</external_references>
                </sequence>
            </protein_or_peptide>
            <protein_or_peptide macromolecule_id="7">
                <name>Photosystem I reaction center subunit VIII</name>
                <natural_source database="NCBI">
                    <organism ncbi="2676140">Cyanobacterium aponinum 0216</organism>
                    <strain>0216</strain>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.003913726</theoretical>
                </molecular_weight>
                <number_of_copies>3</number_of_copies>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>ILGDFAASFLPAILVPAVGLVMPAVVMGLLFLQIESEA</string>
                    <external_references type="UNIPROTKB">K9Z9J3</external_references>
                </sequence>
            </protein_or_peptide>
            <protein_or_peptide macromolecule_id="8">
                <name>Photosystem I reaction center subunit IX</name>
                <natural_source database="NCBI">
                    <organism ncbi="2676140">Cyanobacterium aponinum 0216</organism>
                    <strain>0216</strain>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.004354158</theoretical>
                </molecular_weight>
                <number_of_copies>3</number_of_copies>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>KGLTTFLSTAPVLITALLVFTAGLLIEFNRFYPDLLFHP</string>
                    <external_references type="UNIPROTKB">A0A2G3PEV6</external_references>
                </sequence>
            </protein_or_peptide>
            <protein_or_peptide macromolecule_id="9">
                <name>Photosystem I reaction center subunit PsaK</name>
                <natural_source database="NCBI">
                    <organism ncbi="2676140">Cyanobacterium aponinum 0216</organism>
                    <strain>0216</strain>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.007860323</theoretical>
                </molecular_weight>
                <number_of_copies>3</number_of_copies>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>AVPTTLEWNLNVGLTMIVCNIVAIAFAKYTMKEPGAGPKLPGEAFFGGMGLPALLATTSFGHLLGAGVILGLASLGAL</string>
                    <external_references type="UNIPROTKB">A0A2G3P6W6</external_references>
                </sequence>
            </protein_or_peptide>
            <protein_or_peptide macromolecule_id="10">
                <name>Photosystem I reaction center subunit XI</name>
                <natural_source database="NCBI">
                    <organism ncbi="2676140">Cyanobacterium aponinum 0216</organism>
                    <strain>0216</strain>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.016779294999999996</theoretical>
                </molecular_weight>
                <number_of_copies>3</number_of_copies>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>IDVVNHGGDPQVGNLSTPINGSAFTKAFINALPAYRKGLSPNRRGLEVGMAHGYLLYGPFAVLGPLRLTEYGPTAGLLAT
IGLVSILTICLSIYGAVGVSKPTETLTTPEVPMDLATKEGWSEFAGGFLLGGCGGAFFAFFLCQTPHLQPLIEVASNIWS</string>
                    <external_references type="UNIPROTKB">A0A2G3P7D5</external_references>
                </sequence>
            </protein_or_peptide>
            <protein_or_peptide macromolecule_id="11">
                <name>Photosystem I reaction center subunit XII</name>
                <natural_source database="NCBI">
                    <organism ncbi="2676140">Cyanobacterium aponinum 0216</organism>
                    <strain>0216</strain>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.00327892</theoretical>
                </molecular_weight>
                <number_of_copies>3</number_of_copies>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>SISETQVFVALVIALIPGILAFRLATELYK</string>
                    <external_references type="UNIPROTKB">A0A2G3PA81</external_references>
                </sequence>
            </protein_or_peptide>
            <ligand macromolecule_id="12">
                <name>CHLOROPHYLL A ISOMER</name>
                <molecular_weight>
                    <theoretical units="MDa">0.000893489</theoretical>
                </molecular_weight>
                <number_of_copies>3</number_of_copies>
                <formula>CL0</formula>
            </ligand>
            <ligand macromolecule_id="13">
                <name>CHLOROPHYLL A</name>
                <molecular_weight>
                    <theoretical units="MDa">0.000893489</theoretical>
                </molecular_weight>
                <number_of_copies>285</number_of_copies>
                <formula>CLA</formula>
            </ligand>
            <ligand macromolecule_id="14">
                <name>PHYLLOQUINONE</name>
                <molecular_weight>
                    <theoretical units="MDa">0.000450696</theoretical>
                </molecular_weight>
                <number_of_copies>6</number_of_copies>
                <formula>PQN</formula>
            </ligand>
            <ligand macromolecule_id="15">
                <name>IRON/SULFUR CLUSTER</name>
                <molecular_weight>
                    <theoretical units="MDa">0.00035163999999999996</theoretical>
                </molecular_weight>
                <number_of_copies>9</number_of_copies>
                <formula>SF4</formula>
            </ligand>
            <ligand macromolecule_id="16">
                <name>BETA-CAROTENE</name>
                <molecular_weight>
                    <theoretical units="MDa">0.000536873</theoretical>
                </molecular_weight>
                <number_of_copies>69</number_of_copies>
                <formula>BCR</formula>
            </ligand>
            <ligand macromolecule_id="17">
                <name>1,2-DIPALMITOYL-PHOSPHATIDYL-GLYCEROLE</name>
                <molecular_weight>
                    <theoretical units="MDa">0.00072297</theoretical>
                </molecular_weight>
                <number_of_copies>6</number_of_copies>
                <formula>LHG</formula>
            </ligand>
            <ligand macromolecule_id="18">
                <name>1,2-DISTEAROYL-MONOGALACTOSYL-DIGLYCERIDE</name>
                <molecular_weight>
                    <theoretical units="MDa">0.0007871579999999999</theoretical>
                </molecular_weight>
                <number_of_copies>3</number_of_copies>
                <formula>LMG</formula>
            </ligand>
            <ligand macromolecule_id="19">
                <name>1,2-DI-O-ACYL-3-O-[6-DEOXY-6-SULFO-ALPHA-D-GLUCOPYRANOSYL]-SN-GLYCEROL</name>
                <molecular_weight>
                    <theoretical units="MDa">0.0007951159999999999</theoretical>
                </molecular_weight>
                <number_of_copies>3</number_of_copies>
                <formula>SQD</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">
                    <buffer>
                        <ph>8.0</ph>
                    </buffer>
                    <grid>
                        <details>unspecified</details>
                    </grid>
                    <vitrification>
                        <cryogen_name>ETHANE</cryogen_name>
                    </vitrification>
                </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>
                    <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>SUPER-RESOLUTION</detector_mode>
                            <average_electron_dose_per_image units="e/Å^2">1.53</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>
                    <software_list>
                        <software>
                            <name>CTFFIND</name>
                            <version>4.1</version>
                        </software>
                    </software_list>
                    <type>PHASE FLIPPING AND AMPLITUDE CORRECTION</type>
                </ctf_correction>
                <startup_model type_of_model="NONE"/>
                <final_reconstruction>
                    <applied_symmetry>
                        <point_group>C3</point_group>
                    </applied_symmetry>
                    <resolution units="Å" res_type="BY AUTHOR">2.7</resolution>
                    <resolution_method>FSC 0.143 CUT-OFF</resolution_method>
                    <software_list>
                        <software>
                            <name>RELION</name>
                        </software>
                    </software_list>
                    <number_images_used>75290</number_images_used>
                </final_reconstruction>
                <initial_angle_assignment>
                    <type>MAXIMUM LIKELIHOOD</type>
                    <software_list>
                        <software>
                            <name>RELION</name>
                            <version>3.0.7</version>
                        </software>
                    </software_list>
                </initial_angle_assignment>
                <final_angle_assignment>
                    <type>MAXIMUM LIKELIHOOD</type>
                    <software_list>
                        <software>
                            <name>RELION</name>
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        <label>::::EMDATABANK.org::::EMD-21320::::</label>
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