<?xml version="1.0" encoding="UTF-8"?>
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    <admin>
        <current_status>
            <date>2024-10-16</date>
            <code>REL</code>
            <processing_site>PDBe</processing_site>
        </current_status>
        <sites>
            <deposition>PDBe</deposition>
            <last_processing>PDBe</last_processing>
        </sites>
        <key_dates>
            <deposition>2020-08-19</deposition>
            <header_release>2021-09-01</header_release>
            <map_release>2021-09-01</map_release>
            <update>2024-10-16</update>
        </key_dates>
        <grant_support>
            <grant_reference>
                <funding_body>Wellcome Trust</funding_body>
                <code>101908/Z/13/Z</code>
                <country>United Kingdom</country>
            </grant_reference>
            <grant_reference>
                <funding_body>Wellcome Trust</funding_body>
                <code>217191/Z/19/Z</code>
                <country>United Kingdom</country>
            </grant_reference>
            <grant_reference>
                <funding_body>National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)</funding_body>
                <code>R01 GM102869-01</code>
                <country>United States</country>
            </grant_reference>
        </grant_support>
        <title>Envelope glycprotein of endogenous retrovirus Y032 (Atlas virus) from the human hookworm Ancylostoma ceylanicum</title>
        <authors_list>
            <author>Mata CP</author>
            <author>Merchant M</author>
        </authors_list>
        <keywords>class II membrane fusion protein; retroviral envelope protein (Env); lipid binding protein; disulfide bonding, VIRAL PROTEIN</keywords>
    </admin>
    <crossreferences>
        <citation_list>
            <primary_citation>
                <journal_citation published="true">
                    <author ORCID="0000-0002-6783-7193" order="1">Merchant M</author>
                    <author ORCID="0000-0003-3381-7431" order="2">Mata CP</author>
                    <author ORCID="0000-0001-8843-3529" order="3">Liu Y</author>
                    <author order="4">Zhai H</author>
                    <author ORCID="0000-0003-1723-800X" order="5">Protasio AV</author>
                    <author ORCID="0000-0002-6084-0429" order="6">Modis Y</author>
                    <title>A bioactive phlebovirus-like envelope protein in a hookworm endogenous virus.</title>
                    <journal_abbreviation>Sci Adv</journal_abbreviation>
                    <country>US</country>
                    <volume>8</volume>
                    <first_page>eabj6894</first_page>
                    <last_page>eabj6894</last_page>
                    <year>2022</year>
                    <external_references type="PUBMED">35544562</external_references>
                    <external_references type="DOI">doi:10.1126/sciadv.abj6894</external_references>
                    <external_references type="ISSN">2375-2548</external_references>
                </journal_citation>
            </primary_citation>
            <secondary_citation>
                <journal_citation published="true">
                    <author order="7">Merchant M</author>
                    <author order="8">Mata CP</author>
                    <author order="9">Liu Y</author>
                    <author order="10">Zhai H</author>
                    <author order="11">Protasio AV</author>
                    <author order="12">Modis Y</author>
                    <title>A bioactive phlebovirus-like envelope protein in a hookworm endogenous virus</title>
                    <journal_abbreviation>Biorxiv</journal_abbreviation>
                    <country>US</country>
                    <year>2021</year>
                    <external_references type="DOI">doi:10.1101/2021.11.23.469668</external_references>
                    <external_references type="ISSN">2692-8205</external_references>
                </journal_citation>
            </secondary_citation>
        </citation_list>
        <pdb_list>
            <pdb_reference>
                <pdb_id>7a4a</pdb_id>
                <relationship>
                    <in_frame>FULLOVERLAP</in_frame>
                </relationship>
            </pdb_reference>
        </pdb_list>
    </crossreferences>
    <sample>
        <name>Viral envelope glycoprotein</name>
        <supramolecule_list>
            <complex_supramolecule supramolecule_id="1">
                <name>Viral envelope glycoprotein</name>
                <parent>0</parent>
                <macromolecule_list>
                    <macromolecule>
                        <macromolecule_id>1</macromolecule_id>
                    </macromolecule>
                </macromolecule_list>
                <details>Envelope glycoprotein of endogenous retrovirus Y032 (Atlas virus) from Ancylostoma ceylanicum</details>
                <natural_source database="NCBI">
                    <organism ncbi="53326">Ancylostoma ceylanicum</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.143</theoretical>
                </molecular_weight>
            </complex_supramolecule>
        </supramolecule_list>
        <macromolecule_list>
            <protein_or_peptide macromolecule_id="1">
                <name>Integrase catalytic domain-containing protein</name>
                <natural_source database="NCBI">
                    <organism ncbi="53326">Ancylostoma ceylanicum</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.05151909</theoretical>
                </molecular_weight>
                <details>In chains A, B and C, residue Asn414 is covalently modified with an N-linked N-acetyl glucosamine ligand. Chains A, B and C each contain the following 15 disulfide bonds: Cys1-Cys41, Cys14-Cys23, Cys66-Cys162, Cys87-Cys135, Cys93-Cys142, Cys98-Cys123, Cys127-Cys132, Cys129-Cys138, Cys246-Cys257, Cys264-Cys277, Cys266-Cys275, Cys337-Cys408, Cys347-Cys350, Cys360-Cys382, Cys373-Cys404.</details>
                <number_of_copies>3</number_of_copies>
                <recombinant_expression database="NCBI">
                    <recombinant_organism ncbi="7227">Drosophila melanogaster</recombinant_organism>
                </recombinant_expression>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>CSEVISVTSTEEVCTIQENKETCTFNHATTITLQPLQQQTCLTLNDPEKRPMGMLTVKPDGIKFRCNKKIEFFTRDHQIV
SESVHRCHRAGSCHSDECHHVKDTDALPEFSSEANSRPGYTSCSSSCGCITCDGCFFCEPSCLFHRLYAIPTTPTIYSIF
YCPSWELEVDAEISLQREDETTTSTIRLLPGRTSTWNNIRFSLIGTIVPQLPILSSAFVTNGRQTSIVKPAYAGQLQSNS
VGQLQCPNLEAAKQFECHFSRNLCTCTNALHKVSCTCYDGSVEDHMEALPLPQTSKNFLVFEKDRNIYAKTHVGSALQLH
IVAQDLKITTVKHTSHCQVEASDLSGCYSCTSGASLTLSCKSDNGEVLANMKCNEQTHVIRCTESGFINNILLMFDTSEV
AADCTAACPGGIVNFTIKGLLAFVNERIISQSYSATDVERNIKGKPIPNPLLGLDSTRTGHHHHHH</string>
                    <external_references type="UNIPROTKB">A0A016UZK2</external_references>
                </sequence>
            </protein_or_peptide>
            <ligand macromolecule_id="2">
                <name>2-acetamido-2-deoxy-beta-D-glucopyranose</name>
                <molecular_weight>
                    <theoretical units="MDa">0.000221208</theoretical>
                </molecular_weight>
                <number_of_copies>3</number_of_copies>
                <formula>NAG</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">0.025</concentration>
                    <buffer>
                        <ph>8.0</ph>
                        <component>
                            <concentration units="mM">20.0</concentration>
                            <formula>NH12C4O3Cl</formula>
                            <name>Tris/HCl</name>
                        </component>
                        <component>
                            <concentration units="M">0.1</concentration>
                            <formula>NaCl</formula>
                            <name>sodium chloride</name>
                        </component>
                        <component>
                            <concentration units="%">5.0</concentration>
                            <formula>C3H8O3</formula>
                            <name>glycerol</name>
                        </component>
                        <component>
                            <concentration units="mM">0.5</concentration>
                            <formula>C9H15O6P</formula>
                            <name>TCEP</name>
                        </component>
                        <details>20 mM Tris/HCl (NH12C4O3Cl)
0.1 M NaCl       'sodium chloride' 
5 % glycerol (C3H8O3)       
0.5 mM TCEP (C9H15O6P)</details>
                    </buffer>
                    <grid>
                        <model>Quantifoil R1.2/1.3</model>
                        <material>COPPER</material>
                        <mesh>400</mesh>
                        <support_film film_type_id="1">
                            <film_material>CARBON</film_material>
                            <film_topology>HOLEY</film_topology>
                        </support_film>
                        <pretreatment>
                            <type>GLOW DISCHARGE</type>
                        </pretreatment>
                    </grid>
                    <vitrification>
                        <cryogen_name>ETHANE</cryogen_name>
                        <chamber_humidity units="percentage">100</chamber_humidity>
                        <chamber_temperature units="K">277.2</chamber_temperature>
                        <instrument>FEI VITROBOT MARK IV</instrument>
                        <details>Grids were blotted for 4 s. </details>
                    </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>
                    <nominal_defocus_min units="µm">1.3</nominal_defocus_min>
                    <nominal_defocus_max units="µm">3.5</nominal_defocus_max>
                    <calibrated_magnification>75000.0</calibrated_magnification>
                    <specimen_holder_model>FEI TITAN KRIOS AUTOGRID HOLDER</specimen_holder_model>
                    <cooling_holder_cryogen>NITROGEN</cooling_holder_cryogen>
                    <alignment_procedure>
                        <zemlin_tableau/>
                    </alignment_procedure>
                    <specialist_optics>
                        <phase_plate>OTHER</phase_plate>
                        <sph_aberration_corrector>None</sph_aberration_corrector>
                        <chr_aberration_corrector>None</chr_aberration_corrector>
                        <energy_filter>
                            <name>GIF Quantum LS</name>
                            <slit_width units="eV">20</slit_width>
                        </energy_filter>
                    </specialist_optics>
                    <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>COUNTING</detector_mode>
                            <digitization_details>
                                <dimensions>
                                    <width units="pixel">3838</width>
                                    <height units="pixel">3710</height>
                                </dimensions>
                            </digitization_details>
                            <number_grids_imaged>1</number_grids_imaged>
                            <number_real_images>3027</number_real_images>
                            <average_exposure_time units="s">8.0</average_exposure_time>
                            <average_electron_dose_per_image units="e/Å^2">46.18</average_electron_dose_per_image>
                            <details>Dose rate = 1.28 e- A^-2 per frame</details>
                        </image_recording>
                    </image_recording_list>
                </single_particle_microscopy>
            </microscopy_list>
            <singleparticle_processing image_processing_id="1">
                <image_recording_id>1</image_recording_id>
                <details>Movies were motion-corrected and dose-weighted with MOTIONCOR2.</details>
                <particle_selection>
                    <number_selected>987570</number_selected>
                    <details>2D references from initial datasets were used to auto-pick the micrographs. One round of reference-free 2D classification was performed to produce templates for better reference-dependent auto-picking.</details>
                </particle_selection>
                <startup_model type_of_model="OTHER">
                    <details>Micrographs from initial datasets allowed us to obtain a model at 19 A resolution from 3,790 particles. This model was filtered at 40 A resolution and used as the initial model for 3D classification.</details>
                </startup_model>
                <final_reconstruction>
                    <number_classes_used>1</number_classes_used>
                    <applied_symmetry>
                        <point_group>C3</point_group>
                    </applied_symmetry>
                    <algorithm>FOURIER SPACE</algorithm>
                    <resolution units="Å" res_type="BY AUTHOR">3.76</resolution>
                    <resolution_method>FSC 0.143 CUT-OFF</resolution_method>
                    <software_list>
                        <software>
                            <name>RELION</name>
                            <version>3.0</version>
                        </software>
                    </software_list>
                    <number_images_used>197145</number_images_used>
                </final_reconstruction>
                <initial_angle_assignment>
                    <type>MAXIMUM LIKELIHOOD</type>
                    <software_list>
                        <software>
                            <name>RELION</name>
                            <version>3.0</version>
                        </software>
                    </software_list>
                </initial_angle_assignment>
                <final_angle_assignment>
                    <type>MAXIMUM LIKELIHOOD</type>
                    <software_list>
                        <software>
                            <name>RELION</name>
                            <version>3.0</version>
                        </software>
                    </software_list>
                </final_angle_assignment>
                <final_three_d_classification>
                    <number_classes>4</number_classes>
                    <software_list>
                        <software>
                            <name>RELION</name>
                            <version>3.0</version>
                        </software>
                    </software_list>
                </final_three_d_classification>
            </singleparticle_processing>
        </structure_determination>
    </structure_determination_list>
    <map format="CCP4" size_kbytes="44958">
        <file>emd_11630.map.gz</file>
        <symmetry>
            <space_group>1</space_group>
        </symmetry>
        <data_type>IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)</data_type>
        <dimensions>
            <col>224</col>
            <row>224</row>
            <sec>224</sec>
        </dimensions>
        <origin>
            <col>-112</col>
            <row>-112</row>
            <sec>-112</sec>
        </origin>
        <spacing>
            <x>224</x>
            <y>224</y>
            <z>224</z>
        </spacing>
        <cell>
            <a units="Å">234.52802</a>
            <b units="Å">234.52802</b>
            <c units="Å">234.52802</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>-0.09405723</minimum>
            <maximum>0.17276947</maximum>
            <average>-0.000036032765</average>
            <std>0.0043969885</std>
        </statistics>
        <pixel_spacing>
            <x units="Å">1.047</x>
            <y units="Å">1.047</y>
            <z units="Å">1.047</z>
        </pixel_spacing>
        <contour_list>
            <contour primary="true">
                <level>0.0153</level>
                <source>AUTHOR</source>
            </contour>
        </contour_list>
        <label>::::EMDATABANK.org::::EMD-11630::::</label>
        <annotation_details>Final EM map</annotation_details>
    </map>
    <interpretation>
        <modelling_list>
            <modelling>
                <initial_model>
                    <access_code>6EGU</access_code>
                    <chain>
                        <chain_id>A</chain_id>
                        <residue_range>691-1136</residue_range>
                        <source_name>PDB</source_name>
                        <initial_model_type>experimental model</initial_model_type>
                    </chain>
                    <details>A homology model was built from PDB:6EGU using the Swiss-Model server (swissmodel.expasy.org). The model was docked as a rigid body into the density with UCSF Chimera prior to refinement.</details>
                </initial_model>
                <refinement_protocol>FLEXIBLE FIT</refinement_protocol>
                <details>A homology model was built from PDB:6EGU using the Swiss-Model server (swissmodel.expasy.org). The model was docked as a rigid body into the density with UCSF Chimera prior to refinement.</details>
                <target_criteria>Cross-correlation coefficient</target_criteria>
                <refinement_space>REAL</refinement_space>
                <overall_bvalue>82.0</overall_bvalue>
            </modelling>
        </modelling_list>
        <segmentation_list>
            <segmentation>
                <file>emd_11630_msk_1.map</file>
            </segmentation>
        </segmentation_list>
        <half_map_list>
            <half_map format="CCP4" size_kbytes="44958">
                <file>emd_11630_half_map_1.map.gz</file>
                <symmetry>
                    <space_group>1</space_group>
                </symmetry>
                <data_type>IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)</data_type>
                <dimensions>
                    <col>224</col>
                    <row>224</row>
                    <sec>224</sec>
                </dimensions>
                <origin>
                    <col>-112</col>
                    <row>-112</row>
                    <sec>-112</sec>
                </origin>
                <spacing>
                    <x>224</x>
                    <y>224</y>
                    <z>224</z>
                </spacing>
                <cell>
                    <a units="Å">234.52802</a>
                    <b units="Å">234.52802</b>
                    <c units="Å">234.52802</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>-0.019995078</minimum>
                    <maximum>0.04290658</maximum>
                    <average>-0.00003635651</average>
                    <std>0.00196977</std>
                </statistics>
                <pixel_spacing>
                    <x units="Å">1.047</x>
                    <y units="Å">1.047</y>
                    <z units="Å">1.047</z>
                </pixel_spacing>
                <contour_list>
                    <contour primary="true">
                        <source>AUTHOR</source>
                    </contour>
                </contour_list>
                <label>::::EMDATABANK.org::::EMD-11630::::</label>
                <annotation_details>Half map 1</annotation_details>
            </half_map>
            <half_map format="CCP4" size_kbytes="44958">
                <file>emd_11630_half_map_2.map.gz</file>
                <symmetry>
                    <space_group>1</space_group>
                </symmetry>
                <data_type>IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)</data_type>
                <dimensions>
                    <col>224</col>
                    <row>224</row>
                    <sec>224</sec>
                </dimensions>
                <origin>
                    <col>-112</col>
                    <row>-112</row>
                    <sec>-112</sec>
                </origin>
                <spacing>
                    <x>224</x>
                    <y>224</y>
                    <z>224</z>
                </spacing>
                <cell>
                    <a units="Å">234.52802</a>
                    <b units="Å">234.52802</b>
                    <c units="Å">234.52802</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>-0.018770304</minimum>
                    <maximum>0.03987026</maximum>
                    <average>-0.00003570902</average>
                    <std>0.001972189</std>
                </statistics>
                <pixel_spacing>
                    <x units="Å">1.047</x>
                    <y units="Å">1.047</y>
                    <z units="Å">1.047</z>
                </pixel_spacing>
                <contour_list>
                    <contour primary="true">
                        <source>AUTHOR</source>
                    </contour>
                </contour_list>
                <label>::::EMDATABANK.org::::EMD-11630::::</label>
                <annotation_details>Half map 2</annotation_details>
            </half_map>
        </half_map_list>
    </interpretation>
</emd>
