<?xml version="1.0" encoding="UTF-8"?>
<emd xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="https://ftp.ebi.ac.uk/pub/databases/em_ebi/emdb_related/emdb-schemas/emdb_schemas/v3/v3_0_9_3/emdb.xsd" version="3.0.9.3" emdb_id="EMD-20082">
    <admin>
        <current_status>
            <date>2024-05-15</date>
            <code>REL</code>
            <processing_site>RCSB</processing_site>
        </current_status>
        <sites>
            <deposition>RCSB</deposition>
            <last_processing>RCSB</last_processing>
        </sites>
        <key_dates>
            <deposition>2019-04-10</deposition>
            <header_release>2018-12-19</header_release>
            <map_release>2019-08-07</map_release>
            <update>2024-05-15</update>
        </key_dates>
        <grant_support>
            <grant_reference>
                <funding_body>National Institutes of Health/National Center for Research Resources (NIH/NCRR)</funding_body>
                <code>5T32GM008496</code>
                <country>United States</country>
            </grant_reference>
            <grant_reference>
                <funding_body>National Science Foundation (NSF, United States)</funding_body>
                <code>MCB-1714569</code>
                <country>United States</country>
            </grant_reference>
            <grant_reference>
                <funding_body>National Institutes of Health/National Center for Research Resources (NIH/NCRR)</funding_body>
                <code>GM-007185</code>
                <country>United States</country>
            </grant_reference>
            <grant_reference>
                <funding_body>Howard Hughes Medical Institute (HHMI)</funding_body>
                <country>United States</country>
            </grant_reference>
        </grant_support>
        <title>Amyloid-Beta (20-34) wild type</title>
        <authors_list>
            <author>Sawaya MR</author>
            <author>Warmack RA</author>
        </authors_list>
        <keywords>protofilament, 2 sub 1 screw symmetry, PROTEIN FIBRIL</keywords>
    </admin>
    <crossreferences>
        <citation_list>
            <primary_citation>
                <journal_citation published="true">
                    <author ORCID="0000-0002-9612-0511" order="1">Warmack RA</author>
                    <author order="2">Boyer DR</author>
                    <author order="3">Zee CT</author>
                    <author order="4">Richards LS</author>
                    <author ORCID="0000-0003-0874-9043" order="5">Sawaya MR</author>
                    <author ORCID="0000-0001-8285-754X" order="6">Cascio D</author>
                    <author ORCID="0000-0002-9254-4069" order="7">Gonen T</author>
                    <author ORCID="0000-0003-2432-5419" order="8">Eisenberg DS</author>
                    <author order="9">Clarke SG</author>
                    <title>Structure of amyloid-beta (20-34) with Alzheimer's-associated isomerization at Asp23 reveals a distinct protofilament interface.</title>
                    <journal_abbreviation>Nat Commun</journal_abbreviation>
                    <country>UK</country>
                    <volume>10</volume>
                    <first_page>3357</first_page>
                    <last_page>3357</last_page>
                    <year>2019</year>
                    <external_references type="PUBMED">31350392</external_references>
                    <external_references type="DOI">doi:10.1038/s41467-019-11183-z</external_references>
                    <external_references type="ISSN">2041-1723</external_references>
                </journal_citation>
            </primary_citation>
        </citation_list>
        <pdb_list>
            <pdb_reference>
                <pdb_id>6oiz</pdb_id>
                <relationship>
                    <in_frame>FULLOVERLAP</in_frame>
                </relationship>
            </pdb_reference>
        </pdb_list>
    </crossreferences>
    <sample>
        <name>crystal of amyloid-beta residues 20-34 wild type</name>
        <supramolecule_list>
            <complex_supramolecule supramolecule_id="1">
                <name>crystal of amyloid-beta residues 20-34 wild type</name>
                <parent>0</parent>
                <macromolecule_list>
                    <macromolecule>
                        <macromolecule_id>1</macromolecule_id>
                    </macromolecule>
                </macromolecule_list>
                <natural_source database="NCBI">
                    <organism ncbi="9606">Homo sapiens</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="kDa/nm">6.21</theoretical>
                </molecular_weight>
            </complex_supramolecule>
        </supramolecule_list>
        <macromolecule_list>
            <protein_or_peptide macromolecule_id="1">
                <name>Amyloid beta A4 protein</name>
                <natural_source database="NCBI">
                    <organism ncbi="9606">Homo sapiens</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.0014916659999999998</theoretical>
                </molecular_weight>
                <number_of_copies>1</number_of_copies>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>FAEDVGSNKGAIIGL</string>
                    <external_references type="UNIPROTKB">L7XCZ9</external_references>
                </sequence>
            </protein_or_peptide>
            <ligand macromolecule_id="2">
                <name>water</name>
                <molecular_weight>
                    <theoretical units="MDa">1.8015e-05</theoretical>
                </molecular_weight>
                <number_of_copies>7</number_of_copies>
                <formula>HOH</formula>
            </ligand>
        </macromolecule_list>
    </sample>
    <structure_determination_list>
        <structure_determination structure_determination_id="1">
            <method>electronCrystallography</method>
            <aggregation_state>threeDArray</aggregation_state>
            <specimen_preparation_list>
                <crystallography_preparation preparation_id="1">
                    <concentration units="mg/mL">5.0</concentration>
                    <buffer>
                        <ph>7.5</ph>
                        <component>
                            <name>water</name>
                        </component>
                        <component>
                            <concentration units="mM">50.0</concentration>
                            <name>tris base</name>
                        </component>
                        <component>
                            <concentration units="mM">150.0</concentration>
                            <formula>NaCl</formula>
                        </component>
                        <component>
                            <concentration units="%">1.0</concentration>
                            <name>dimethylsulfoxide</name>
                        </component>
                    </buffer>
                    <grid>
                        <model>Quantifoil, UltrAuFoil, R1.2/1.3</model>
                        <support_film film_type_id="1">
                            <film_material>CARBON</film_material>
                            <film_topology>HOLEY ARRAY</film_topology>
                            <film_thickness>30.0</film_thickness>
                        </support_film>
                        <pretreatment>
                            <type>GLOW DISCHARGE</type>
                            <time units="s">30</time>
                        </pretreatment>
                        <details>30 seconds on each side</details>
                    </grid>
                    <vitrification>
                        <cryogen_name>ETHANE</cryogen_name>
                        <chamber_temperature units="K">100</chamber_temperature>
                        <instrument>FEI VITROBOT MARK IV</instrument>
                    </vitrification>
                    <details>This sample is a crystal.</details>
                    <crystal_formation>
                        <instrument>Varioscan plate reader</instrument>
                        <atmosphere>air</atmosphere>
                        <temperature units="K">310.0</temperature>
                        <time units="HOUR">30.0</time>
                        <details>shaken at 1200 rpm</details>
                    </crystal_formation>
                </crystallography_preparation>
            </specimen_preparation_list>
            <microscopy_list>
                <crystallography_microscopy microscopy_id="1">
                    <microscope>FEI TALOS ARCTICA</microscope>
                    <illumination_mode>FLOOD BEAM</illumination_mode>
                    <imaging_mode>DIFFRACTION</imaging_mode>
                    <electron_source>FIELD EMISSION GUN</electron_source>
                    <acceleration_voltage units="kV">200</acceleration_voltage>
                    <specimen_holder_model>FEI TITAN KRIOS AUTOGRID HOLDER</specimen_holder_model>
                    <cooling_holder_cryogen>NITROGEN</cooling_holder_cryogen>
                    <temperature>
                        <temperature_min units="K">100.0</temperature_min>
                        <temperature_max units="K">100.0</temperature_max>
                    </temperature>
                    <alignment_procedure>
                        <basic/>
                    </alignment_procedure>
                    <image_recording_list>
                        <image_recording image_recording_id="1">
                            <film_or_detector_model>FEI CETA (4k x 4k)</film_or_detector_model>
                            <digitization_details>
                                <dimensions>
                                    <width units="pixel">2048</width>
                                    <height units="pixel">2048</height>
                                </dimensions>
                            </digitization_details>
                            <number_grids_imaged>2</number_grids_imaged>
                            <number_diffraction_images>404</number_diffraction_images>
                            <average_exposure_time units="s">3.0</average_exposure_time>
                            <average_electron_dose_per_image units="e/Å^2">0.01</average_electron_dose_per_image>
                        </image_recording>
                    </image_recording_list>
                    <camera_length units="mm">1050</camera_length>
                </crystallography_microscopy>
            </microscopy_list>
            <crystallography_processing image_processing_id="1">
                <image_recording_id>1</image_recording_id>
                <final_reconstruction>
                    <resolution_method>DIFFRACTION PATTERN/LAYERLINES</resolution_method>
                </final_reconstruction>
                <crystallography_statistics>
                    <number_intensities_measured>23638</number_intensities_measured>
                    <number_structure_factors>3546</number_structure_factors>
                    <fourier_space_coverage>85.200000000000003</fourier_space_coverage>
                    <r_sym>0.189</r_sym>
                    <r_merge>0.189</r_merge>
                    <overall_phase_error>22.7</overall_phase_error>
                    <overall_phase_residual>0.1</overall_phase_residual>
                    <phase_error_rejection_criteria>0.1</phase_error_rejection_criteria>
                    <high_resolution units="Å">1.1</high_resolution>
                    <shell_list>
                        <shell shell_id="1">
                            <high_resolution units="Å">1.0</high_resolution>
                            <low_resolution units="Å">1.05</low_resolution>
                            <number_structure_factors>315</number_structure_factors>
                            <phase_residual>0.1</phase_residual>
                            <fourier_space_coverage>41.200000000000003</fourier_space_coverage>
                            <multiplicity>3.09</multiplicity>
                        </shell>
                    </shell_list>
                </crystallography_statistics>
            </crystallography_processing>
        </structure_determination>
    </structure_determination_list>
    <map format="CCP4" size_kbytes="359">
        <file>emd_20082.map.gz</file>
        <symmetry>
            <space_group>4</space_group>
        </symmetry>
        <data_type>IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)</data_type>
        <dimensions>
            <col>8</col>
            <row>112</row>
            <sec>100</sec>
        </dimensions>
        <origin>
            <col>0</col>
            <row>0</row>
            <sec>0</sec>
        </origin>
        <spacing>
            <x>112</x>
            <y>16</y>
            <z>100</z>
        </spacing>
        <cell>
            <a units="Å">33.152</a>
            <b units="Å">4.78</b>
            <c units="Å">30.33</c>
            <alpha units="deg">90.0</alpha>
            <beta units="deg">111.097</beta>
            <gamma units="deg">90.0</gamma>
        </cell>
        <axis_order>
            <fast>Y</fast>
            <medium>X</medium>
            <slow>Z</slow>
        </axis_order>
        <statistics>
            <minimum>-1.2215743</minimum>
            <maximum>5.2652073</maximum>
            <average>0.000000001169028</average>
            <std>0.6957859</std>
        </statistics>
        <pixel_spacing>
            <x units="Å">0.296</x>
            <y units="Å">0.29875</y>
            <z units="Å">0.3033</z>
        </pixel_spacing>
        <contour_list>
            <contour primary="true">
                <level>1.0</level>
                <source>AUTHOR</source>
            </contour>
        </contour_list>
        <label>::::EMDATABANK.org::::D_1000240780::::</label>
    </map>
    <interpretation>
        <modelling_list>
            <modelling>
                <refinement_protocol>OTHER</refinement_protocol>
                <target_criteria>maximum liklihood</target_criteria>
                <refinement_space>RECIPROCAL</refinement_space>
            </modelling>
        </modelling_list>
    </interpretation>
</emd>
