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    <admin>
        <current_status>
            <date>2025-11-26</date>
            <code>REL</code>
            <processing_site>PDBc</processing_site>
        </current_status>
        <revision_history>
            <revision version="1.0" date="2025-11-26">
                <change_list>
                    <model>
                        <revision_type>INITIAL_RELEASE</revision_type>
                        <provider>REPOSITORY</provider>
                    </model>
                </change_list>
            </revision>
        </revision_history>
        <sites>
            <deposition>PDBj</deposition>
            <last_processing>PDBc</last_processing>
        </sites>
        <key_dates>
            <deposition>2025-05-24</deposition>
            <header_release>2025-11-26</header_release>
            <map_release>2025-11-26</map_release>
            <update>2025-11-26</update>
        </key_dates>
        <grant_support>
            <grant_reference>
                <funding_body>National Natural Science Foundation of China (NSFC)</funding_body>
                <code>32325008</code>
                <country>China</country>
            </grant_reference>
        </grant_support>
        <title>Cryo-EM structure of  A. thaliana MET1 with bound SAH</title>
        <authors_list>
            <author>Zhang Z</author>
            <author>Liu Y</author>
            <author>Li W</author>
            <author>Du J</author>
        </authors_list>
        <keywords>DNA methylation, covalent AtMET1-DNA complex, Cryo-EM structure, epigenetic regulation, GENE REGULATION</keywords>
    </admin>
    <crossreferences>
        <citation_list>
            <primary_citation>
                <journal_citation published="true">
                    <author ORCID="0000-0003-0973-9189" order="1">Zhang Z</author>
                    <author ORCID="0009-0004-5403-9071" order="2">Li W</author>
                    <author ORCID="0000-0002-5183-4895" order="3">Liu Y</author>
                    <author ORCID="0009-0009-4169-5578" order="4">Chi C</author>
                    <author ORCID="0000-0002-2635-5219" order="5">Nan J</author>
                    <author ORCID="0000-0001-5206-9737" order="6">Wang C</author>
                    <author ORCID="0009-0003-0397-3537" order="7">Zhu Y</author>
                    <author ORCID="0009-0006-6190-0469" order="8">Zhao J</author>
                    <author ORCID="0000-0003-0871-8853" order="9">Xue Y</author>
                    <author ORCID="0000-0001-7864-0022" order="10">Li Y</author>
                    <author ORCID="0000-0001-7737-181X" order="11">Wang P</author>
                    <author ORCID="0000-0002-0217-0666" order="12">Zhai J</author>
                    <author ORCID="0000-0002-1337-0786" order="13">Du J</author>
                    <title>Structural insights into plant DNA CG methylation maintenance by MET1.</title>
                    <journal_abbreviation>Plant Cell</journal_abbreviation>
                    <country>US</country>
                    <volume>37</volume>
                    <year>2025</year>
                    <external_references type="PUBMED">41082561</external_references>
                    <external_references type="DOI">doi:10.1093/plcell/koaf244</external_references>
                    <external_references type="ISSN">1532-298X</external_references>
                    <external_references type="CSD">2109</external_references>
                    <external_references type="ASTM">PLCEEW</external_references>
                </journal_citation>
            </primary_citation>
        </citation_list>
        <pdb_list>
            <pdb_reference>
                <pdb_id>9v4o</pdb_id>
                <relationship>
                    <in_frame>FULLOVERLAP</in_frame>
                </relationship>
            </pdb_reference>
        </pdb_list>
        <other_db_list>
            <db_reference>
                <db_name>EMDB</db_name>
                <accession_id>EMD-64781</accession_id>
                <content_type>associated EM volume</content_type>
                <details>Cryo-EM structure of  A. thaliana MET1 with bound SAH</details>
            </db_reference>
        </other_db_list>
    </crossreferences>
    <sample>
        <name>DNA (cytosine-5)-methyltransferase 1</name>
        <supramolecule_list>
            <complex_supramolecule supramolecule_id="1">
                <name>DNA (cytosine-5)-methyltransferase 1</name>
                <parent>0</parent>
                <macromolecule_list>
                    <macromolecule>
                        <macromolecule_id>1</macromolecule_id>
                    </macromolecule>
                </macromolecule_list>
                <natural_source database="NCBI">
                    <organism ncbi="3702">Arabidopsis thaliana</organism>
                </natural_source>
            </complex_supramolecule>
        </supramolecule_list>
        <macromolecule_list>
            <protein_or_peptide macromolecule_id="1">
                <name>DNA (cytosine-5)-methyltransferase 1</name>
                <natural_source database="NCBI">
                    <organism ncbi="3702">Arabidopsis thaliana</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.177588062</theoretical>
                </molecular_weight>
                <details>tag(1-40)+DNA (cytosine-5)-methyltransferase 1(41-1574)</details>
                <number_of_copies>1</number_of_copies>
                <recombinant_expression database="NCBI">
                    <recombinant_organism ncbi="274590">Baculovirus expression vector pFastBac1-HM</recombinant_organism>
                </recombinant_expression>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>MSYYHHHHHHHHHHDYDIDYKDDDDKPTTENLYFQGAMGSMVENGAKAAKRKKRPLPEIQEVEDVPRTRRPRRAAACTSF
KEKSIRVCEKSATIEVKKQQIVEEEFLALRLTALETDVEDRPTRRLNDFVLFDSDGVPQPLEMLEIHDIFVSGAILPSDV
CTDKEKEKGVRCTSFGRVEHWSISGYEDGSPVIWISTELADYDCRKPAASYRKVYDYFYEKARASVAVYKKLSKSSGGDP
DIGLEELLAAVVRSMSSGSKYFSSGAAIIDFVISQGDFIYNQLAGLDETAKKHESSYVEIPVLVALREKSSKIDKPLQRE
RNPSNGVRIKEVSQVAESEALTSDQLVDGTDDDRRYAILLQDEENRKSMQQPRKNSSSGSASNMFYIKINEDEIANDYPL
PSYYKTSEEETDELILYDASYEVQSEHLPHRMLHNWALYNSDLRFISLELLPMKQCDDIDVNIFGSGVVTDDNGSWISLN
DPDSGSQSHDPDGMCIFLSQIKEWMIEFGSDDIISISIRTDVAWYRLGKPSKLYAPWWKPVLKTARVGISILTFLRVESR
VARLSFADVTKRLSGLQANDKAYISSDPLAVERYLVVHGQIILQLFAVYPDDNVKRCPFVVGLASKLEDRHHTKWIIKKK
KISLKELNLNPRAGMAPVASKRKAMQATTTRLVNRIWGEFYSNYSPEDPLQATAAENGEDEVEEEGGNGEEEVEEEGENG
LTEDTVPEPVEVQKPHTPKKIRGSSGKREIKWDGESLGKTSAGEPLYQQALVGGEMVAVGGAVTLEVDDPDEMPAIYFVE
YMFESTDHCKMLHGRFLQRGSMTVLGNAANERELFLTNECMTTQLKDIKGVASFEIRSRPWGHQYRKKNITADKLDWARA
LERKVKDLPTEYYCKSLYSPERGGFFSLPLSDIGRSSGFCTSCKIREDEEKRSTIKLNVSKTGFFINGIEYSVEDFVYVN
PDSIGGLKEGSKTSFKSGRNIGLRAYVVCQLLEIVPKESRKADLGSFDVKVRRFYRPEDVSAEKAYASDIQELYFSQDTV
VLPPGALEGKCEVRKKSDMPLSREYPISDHIFFCDLFFDTSKGSLKQLPANMKPKFSTIKDDTLLRKKKGKGVESEIESE
IVKPVEPPKEIRLATLDIFAGCGGLSHGLKKAGVSDAKWAIEYEEPAGQAFKQNHPESTVFVDNCNVILRAIMEKGGDQD
DCVSTTEANELAAKLTEEQKSTLPLPGQVDFINGGPPCQGFSGMNRFNQSSWSKVQCEMILAFLSFADYFRPRYFLLENV
RTFVSFNKGQTFQLTLASLLEMGYQVRFGILEAGAYGVSQSRKRAFIWAAAPEEVLPEWPEPMHVFGVPKLKISLSQGLH
YAAVRSTALGAPFRPITVRDTIGDLPSVENGDSRTNKEYKEVAVSWFQKEIRGNTIALTDHICKAMNELNLIRCKLIPTR
PGADWHDLPKRKVTLSDGRVEEMIPFCLPNTAERHNGWKGLYGRLDWQGNFPTSVTDPQPMGKVGMCFHPEQHRILTVRE
CARSQGFPDSYEFAGNINHKHRQIGNAVPPPLAFALGRKLKEALHLKKSPQHQP</string>
                    <external_references type="UNIPROTKB">P34881</external_references>
                </sequence>
                <ec_number>2.1.1.37</ec_number>
            </protein_or_peptide>
            <ligand macromolecule_id="2">
                <name>S-ADENOSYL-L-HOMOCYSTEINE</name>
                <molecular_weight>
                    <theoretical units="MDa">0.000384411</theoretical>
                </molecular_weight>
                <number_of_copies>1</number_of_copies>
                <formula>SAH</formula>
            </ligand>
            <ligand macromolecule_id="3">
                <name>ZINC ION</name>
                <molecular_weight>
                    <theoretical units="MDa">6.5409e-05</theoretical>
                </molecular_weight>
                <number_of_copies>1</number_of_copies>
                <formula>ZN</formula>
            </ligand>
        </macromolecule_list>
    </sample>
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        <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>7.5</ph>
                    </buffer>
                    <vitrification>
                        <cryogen_name>ETHANE</cryogen_name>
                    </vitrification>
                </single_particle_preparation>
            </specimen_preparation_list>
            <microscopy_list>
                <single_particle_microscopy microscopy_id="1">
                    <microscope>TFS 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_defocus_min units="µm">1.0</nominal_defocus_min>
                    <nominal_defocus_max units="µm">2.5</nominal_defocus_max>
                    <image_recording_list>
                        <image_recording image_recording_id="1">
                            <film_or_detector_model>GATAN K3 BIOQUANTUM (6k x 4k)</film_or_detector_model>
                            <average_electron_dose_per_image units="e/Å^2">50.0</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="OTHER"/>
                <final_reconstruction>
                    <resolution units="Å" res_type="BY AUTHOR">2.92</resolution>
                    <resolution_method>FSC 0.143 CUT-OFF</resolution_method>
                    <number_images_used>629218</number_images_used>
                </final_reconstruction>
                <initial_angle_assignment>
                    <type>MAXIMUM LIKELIHOOD</type>
                </initial_angle_assignment>
                <final_angle_assignment>
                    <type>MAXIMUM LIKELIHOOD</type>
                </final_angle_assignment>
            </singleparticle_processing>
        </structure_determination>
    </structure_determination_list>
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        <file>emd_64781.map.gz</file>
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            <space_group>1</space_group>
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            <row>320</row>
            <sec>320</sec>
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            <b units="Å">272.0</b>
            <c units="Å">272.0</c>
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            <minimum>-0.18259723</minimum>
            <maximum>19.216439999999999</maximum>
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            <y units="Å">0.85</y>
            <z units="Å">0.85</z>
        </pixel_spacing>
        <contour_list>
            <contour primary="true">
                <level>2.1</level>
                <source>AUTHOR</source>
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        </contour_list>
        <label>::::EMDATABANK.org::::EMD-64781::::</label>
        <annotation_details>map of AtMET1 with bound SAH</annotation_details>
    </map>
    <interpretation>
        <half_map_list>
            <half_map format="CCP4" size_kbytes="131073">
                <file>emd_64781_half_map_1.map.gz</file>
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                <dimensions>
                    <col>320</col>
                    <row>320</row>
                    <sec>320</sec>
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                    <y>320</y>
                    <z>320</z>
                </spacing>
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                    <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>
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                <axis_order>
                    <fast>X</fast>
                    <medium>Y</medium>
                    <slow>Z</slow>
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                <statistics>
                    <minimum>-0.35462296</minimum>
                    <maximum>0.5461915</maximum>
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                    <y units="Å">0.85</y>
                    <z units="Å">0.85</z>
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                        <source>AUTHOR</source>
                    </contour>
                </contour_list>
                <label>::::EMDATABANK.org::::EMD-64781::::</label>
                <annotation_details>Half B map of AtMET1 with bound SAH</annotation_details>
            </half_map>
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                </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>
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                    <y>320</y>
                    <z>320</z>
                </spacing>
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                    <b units="Å">272.0</b>
                    <c units="Å">272.0</c>
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                    <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>-0.33082798</minimum>
                    <maximum>0.54721975</maximum>
                    <average>0.000005961232</average>
                    <std>0.03964982</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">
                        <source>AUTHOR</source>
                    </contour>
                </contour_list>
                <label>::::EMDATABANK.org::::EMD-64781::::</label>
                <annotation_details>Half A map of AtMET1 with bound SAH</annotation_details>
            </half_map>
        </half_map_list>
    </interpretation>
</emd>
