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            <map_release>2021-05-05</map_release>
            <update>2025-09-17</update>
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        <grant_support>
            <grant_reference>
                <funding_body>National Science Foundation (NSF, China)</funding_body>
            </grant_reference>
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        <title>Cryo-EM structure of GMPPA/GMPPB complex bound to GTP (State I)</title>
        <authors_list>
            <author>Zheng L</author>
            <author>Liu Z</author>
        </authors_list>
        <keywords>GMPPA, GMPPB, GDP-Mannose homeostasis, CELL CYCLE, TRANSFERASE</keywords>
    </admin>
    <crossreferences>
        <citation_list>
            <primary_citation>
                <journal_citation published="true">
                    <author order="1">Zheng L</author>
                    <author order="2">Liu Z</author>
                    <author order="3">Wang Y</author>
                    <author order="4">Yang F</author>
                    <author order="5">Wang J</author>
                    <author order="6">Huang W</author>
                    <author order="7">Qin J</author>
                    <author order="8">Tian M</author>
                    <author order="9">Cai X</author>
                    <author order="10">Liu X</author>
                    <author order="11">Mo X</author>
                    <author ORCID="0000-0003-3067-9993" order="12">Gao N</author>
                    <author ORCID="0000-0002-2205-1998" order="13">Jia D</author>
                    <title>Cryo-EM structures of human GMPPA-GMPPB complex reveal how cells maintain GDP-mannose homeostasis.</title>
                    <journal_abbreviation>Nat.Struct.Mol.Biol.</journal_abbreviation>
                    <country>US</country>
                    <volume>28</volume>
                    <first_page>1</first_page>
                    <last_page>12</last_page>
                    <year>2021</year>
                    <external_references type="PUBMED">33986552</external_references>
                    <external_references type="DOI">doi:10.1038/s41594-021-00591-9</external_references>
                    <external_references type="ISSN">1545-9985</external_references>
                </journal_citation>
            </primary_citation>
        </citation_list>
        <pdb_list>
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                <pdb_id>7d73</pdb_id>
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                    <in_frame>FULLOVERLAP</in_frame>
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                <accession_id>EMD-30600</accession_id>
                <content_type>associated EM volume</content_type>
                <details>structure of a protein</details>
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    </crossreferences>
    <sample>
        <name>complex</name>
        <supramolecule_list>
            <complex_supramolecule supramolecule_id="1">
                <name>complex</name>
                <parent>0</parent>
                <macromolecule_list>
                    <macromolecule>
                        <macromolecule_id>1</macromolecule_id>
                    </macromolecule>
                    <macromolecule>
                        <macromolecule_id>2</macromolecule_id>
                    </macromolecule>
                </macromolecule_list>
                <natural_source database="NCBI">
                    <organism ncbi="9606">Homo sapiens</organism>
                </natural_source>
            </complex_supramolecule>
        </supramolecule_list>
        <macromolecule_list>
            <protein_or_peptide macromolecule_id="1">
                <name>Mannose-1-phosphate guanyltransferase alpha</name>
                <natural_source database="NCBI">
                    <organism ncbi="9606">Homo sapiens</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.046341961</theoretical>
                </molecular_weight>
                <number_of_copies>4</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>MLKAVILIGGPQKGTRFRPLSFEVPKPLFPVAGVPMIQHHIEACAQVPGMQEILLIGFYQPDEPLTQFLEAAQQEFNLPV
RYLQEFAPLGTGGGLYHFRDQILAGSPEAFFVLNADVCSDFPLSAMLEAHRRQRHPFLLLGTTANRTQSLNYGCIVENPQ
THEVLHYVEKPSTFISDIINCGIYLFSPEALKPLRDVFQRNQQDGQLEDSPGLWPGAGTIRLEQDVFSALAGQGQIYVHL
TDGIWSQIKSAGSALYASRLYLSRYQDTHPERLAKHTPGGPWIRGNVYIHPTAKVAPSAVLGPNVSIGKGVTVGEGVRLR
ESIVLHGATLQEHTCVLHSIVGWGSTVGRWARVEGTPSDPNPNDPRARMDSESLFKDGKLLPAITILGCRVRIPAEVLIL
NSIVLPHKELSRSFTNQIIL</string>
                    <external_references type="UNIPROTKB">Q96IJ6</external_references>
                </sequence>
            </protein_or_peptide>
            <protein_or_peptide macromolecule_id="2">
                <name>Mannose-1-phosphate guanyltransferase beta</name>
                <natural_source database="NCBI">
                    <organism ncbi="9606">Homo sapiens</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.039878316</theoretical>
                </molecular_weight>
                <number_of_copies>8</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>MKALILVGGYGTRLRPLTLSTPKPLVDFCNKPILLHQVEALAAAGVDHVILAVSYMSQVLEKEMKAQEQRLGIRISMSHE
EEPLGTAGPLALARDLLSETADPFFVLNSDVICDFPFQAMVQFHRHHGQEGSILVTKVEEPSKYGVVVCEADTGRIHRFV
EKPQVFVSNKINAGMYILSPAVLQRIQLQPTSIEKEVFPIMAKEGQLYAMELQGFWMDIGQPKDFLTGMCLFLQSLRQKQ
PERLCSGPGIVGNVLVDPSARIGQNCSIGPNVSLGPGVVVEDGVCIRRCTVLRDARIRSHSWLESCIVGWRCRVGQWVRM
ENVTVLGEDVIVNDELYLNGASVLPHKSIGESVPEPRIIM</string>
                    <external_references type="UNIPROTKB">Q9Y5P6</external_references>
                </sequence>
                <ec_number>2.7.7.13</ec_number>
            </protein_or_peptide>
            <ligand macromolecule_id="3">
                <name>GUANOSINE-5'-DIPHOSPHATE-ALPHA-D-MANNOSE</name>
                <molecular_weight>
                    <theoretical units="MDa">0.000605341</theoretical>
                </molecular_weight>
                <number_of_copies>2</number_of_copies>
                <formula>GDD</formula>
            </ligand>
            <ligand macromolecule_id="4">
                <name>GUANOSINE-5'-TRIPHOSPHATE</name>
                <molecular_weight>
                    <theoretical units="MDa">0.0005231799999999999</theoretical>
                </molecular_weight>
                <number_of_copies>10</number_of_copies>
                <formula>GTP</formula>
            </ligand>
        </macromolecule_list>
    </sample>
    <structure_determination_list>
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            <method>singleParticle</method>
            <aggregation_state>cell</aggregation_state>
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                <single_particle_preparation preparation_id="1">
                    <buffer>
                        <ph>8.0</ph>
                    </buffer>
                    <staining>
                        <type>NEGATIVE</type>
                        <material>Uranyl acetate</material>
                    </staining>
                    <vitrification>
                        <cryogen_name>NITROGEN</cryogen_name>
                    </vitrification>
                </single_particle_preparation>
            </specimen_preparation_list>
            <microscopy_list>
                <single_particle_microscopy microscopy_id="1">
                    <microscope>FEI TITAN KRIOS</microscope>
                    <illumination_mode>SPOT SCAN</illumination_mode>
                    <imaging_mode>DARK 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>
                            <average_electron_dose_per_image units="e/Å^2">64.0</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="PDB ENTRY"/>
                <final_reconstruction>
                    <resolution units="Å" res_type="BY AUTHOR">3.0</resolution>
                    <resolution_method>FSC 0.143 CUT-OFF</resolution_method>
                    <number_images_used>106308</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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        <cell>
            <a units="Å">252.48001</a>
            <b units="Å">252.48001</b>
            <c units="Å">252.48001</c>
            <alpha units="deg">90.0</alpha>
            <beta units="deg">90.0</beta>
            <gamma units="deg">90.0</gamma>
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            <contour primary="true">
                <level>0.0389</level>
                <source>AUTHOR</source>
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