<?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_11_0/emdb.xsd" version="3.0.11.0" emdb_id="EMD-31334">
    <admin>
        <current_status>
            <date>2026-05-06</date>
            <code>REL</code>
            <processing_site>PDBj</processing_site>
        </current_status>
        <revision_history>
            <revision version="1.0" date="2022-08-03">
                <change_list>
                    <image>
                        <revision_type>INITIAL_RELEASE</revision_type>
                        <provider>REPOSITORY</provider>
                    </image>
                    <primary_map>
                        <revision_type>INITIAL_RELEASE</revision_type>
                        <provider>REPOSITORY</provider>
                    </primary_map>
                </change_list>
            </revision>
            <revision version="1.1" date="2026-05-06">
                <change_list>
                    <metadata>
                        <revision_group>STRUCTURE_SUMMARY</revision_group>
                        <categories>
                            <category>em_admin</category>
                        </categories>
                        <items>
                            <item>_chem_comp.pdbx_synonyms</item>
                            <item>_em_admin.last_update</item>
                        </items>
                    </metadata>
                </change_list>
            </revision>
            <revision version="1.2" date="2024-01-17">
                <change_list>
                    <model>
                        <revision_group>DATABASE_REFERENCES</revision_group>
                        <categories>
                            <category>citation</category>
                            <category>citation_author</category>
                        </categories>
                        <items>
                            <item>_citation.pdbx_database_id_DOI</item>
                            <item>_citation.title</item>
                            <item>_citation.year</item>
                        </items>
                    </model>
                </change_list>
            </revision>
            <revision version="1.3" date="2024-05-22">
                <change_list>
                    <model>
                        <revision_group>DATABASE_REFERENCES</revision_group>
                        <categories>
                            <category>citation</category>
                            <category>citation_author</category>
                        </categories>
                        <items>
                            <item>_citation.pdbx_database_id_PubMed</item>
                            <item>_citation.title</item>
                            <item>_citation_author.identifier_ORCID</item>
                        </items>
                    </model>
                </change_list>
            </revision>
            <revision version="1.4" date="2026-05-06">
                <change_list>
                    <model>
                        <revision_group>STRUCTURE_SUMMARY</revision_group>
                        <categories>
                            <category>chem_comp</category>
                            <category>em_admin</category>
                            <category>pdbx_entry_details</category>
                        </categories>
                        <items>
                            <item>_chem_comp.pdbx_synonyms</item>
                            <item>_em_admin.last_update</item>
                            <item>_pdbx_entry_details.has_protein_modification</item>
                        </items>
                    </model>
                </change_list>
            </revision>
        </revision_history>
        <sites>
            <deposition>PDBj</deposition>
            <last_processing>PDBj</last_processing>
        </sites>
        <key_dates>
            <deposition>2021-05-21</deposition>
            <header_release>2022-08-03</header_release>
            <map_release>2022-08-03</map_release>
            <update>2026-05-06</update>
        </key_dates>
        <grant_support>
            <grant_reference>
                <funding_body>National Natural Science Foundation of China (NSFC)</funding_body>
                <country>China</country>
            </grant_reference>
        </grant_support>
        <title>The cryo-EM map of the human 17S U2 snRNP core region</title>
        <authors_list>
            <author>Zhang X</author>
            <author>Zhan X</author>
        </authors_list>
        <keywords>U2 snRNP, PRP5, SF3B1, Splicing</keywords>
    </admin>
    <crossreferences>
        <citation_list>
            <primary_citation>
                <journal_citation published="true">
                    <author ORCID="0000-0002-9658-5917" order="1">Zhang X</author>
                    <author ORCID="0000-0003-3084-5656" order="2">Zhan X</author>
                    <author ORCID="0000-0003-0501-8288" order="3">Bian T</author>
                    <author order="4">Yang F</author>
                    <author order="5">Li P</author>
                    <author order="6">Lu Y</author>
                    <author order="7">Xing Z</author>
                    <author order="8">Fan R</author>
                    <author ORCID="0000-0002-4913-0338" order="9">Zhang QC</author>
                    <author ORCID="0000-0003-2030-168X" order="10">Shi Y</author>
                    <title>Structural insights into branch site proofreading by human spliceosome.</title>
                    <journal_abbreviation>Nat.Struct.Mol.Biol.</journal_abbreviation>
                    <country>US</country>
                    <year>2024</year>
                    <external_references type="PUBMED">38196034</external_references>
                    <external_references type="DOI">doi:10.1038/s41594-023-01188-0</external_references>
                    <external_references type="ISSN">1545-9985</external_references>
                </journal_citation>
            </primary_citation>
        </citation_list>
        <pdb_list>
            <pdb_reference>
                <pdb_id>7evo</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-31334</accession_id>
                <content_type>associated EM volume</content_type>
                <details>The cryo-EM structure of the human 17S U2 snRNP</details>
            </db_reference>
        </other_db_list>
    </crossreferences>
    <sample>
        <name>The human U2 snRNP</name>
        <supramolecule_list>
            <complex_supramolecule supramolecule_id="1">
                <name>The human U2 snRNP</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>
                        <macromolecule_id>12</macromolecule_id>
                    </macromolecule>
                    <macromolecule>
                        <macromolecule_id>13</macromolecule_id>
                    </macromolecule>
                    <macromolecule>
                        <macromolecule_id>14</macromolecule_id>
                    </macromolecule>
                    <macromolecule>
                        <macromolecule_id>15</macromolecule_id>
                    </macromolecule>
                    <macromolecule>
                        <macromolecule_id>16</macromolecule_id>
                    </macromolecule>
                    <macromolecule>
                        <macromolecule_id>17</macromolecule_id>
                    </macromolecule>
                    <macromolecule>
                        <macromolecule_id>18</macromolecule_id>
                    </macromolecule>
                    <macromolecule>
                        <macromolecule_id>19</macromolecule_id>
                    </macromolecule>
                    <macromolecule>
                        <macromolecule_id>20</macromolecule_id>
                    </macromolecule>
                    <macromolecule>
                        <macromolecule_id>21</macromolecule_id>
                    </macromolecule>
                </macromolecule_list>
                <natural_source database="NCBI">
                    <organism ncbi="9606">Homo sapiens</organism>
                </natural_source>
            </complex_supramolecule>
        </supramolecule_list>
        <macromolecule_list>
            <rna macromolecule_id="1">
                <name>U2 snRNA</name>
                <natural_source database="NCBI">
                    <organism ncbi="9606">Homo sapiens</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.060186445</theoretical>
                </molecular_weight>
                <number_of_copies>1</number_of_copies>
                <sequence>
                    <string>AUCGCUUCUCGGCCUUUUGGCUAAGAUCAAGUGUAGUAUCUGUUCUUAUCAGUUUAAUAUCUGAUACGUCCUCUAUCCGA
GGACAAUAUAUUAAAUGGAUUUUUGGAGCAGGGAGAUGGAAUAGGAGCUUGCUCCGUCCACUCCACGCAUCGACCUGGUA
UUGCAGUACCUCCAGGAACGGUGCACCC</string>
                    <external_references type="GENBANK">K02227.1</external_references>
                </sequence>
            </rna>
            <protein_or_peptide macromolecule_id="2">
                <name>Splicing factor 3B subunit 1</name>
                <natural_source database="NCBI">
                    <organism ncbi="9606">Homo sapiens</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.146024938</theoretical>
                </molecular_weight>
                <number_of_copies>1</number_of_copies>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>MAKIAKTHEDIEAQIREIQGKKAALDEAQGVGLDSTGYYDQEIYGGSDSRFAGYVTSIAATELEDDDDDYSSSTSLLGQK
KPGYHAPVALLNDIPQSTEQYDPFAEHRPPKIADREDEYKKHRRTMIISPERLDPFADGGKTPDPKMNARTYMDVMREQH
LTKEEREIRQQLAEKAKAGELKVVNGAAASQPPSKRKRRWDQTADQTPGATPKKLSSWDQAETPGHTPSLRWDETPGRAK
GSETPGATPGSKIWDPTPSHTPAGAATPGRGDTPGHATPGHGGATSSARKNRWDETPKTERDTPGHGSGWAETPRTDRGG
DSIGETPTPGASKRKSRWDETPASQMGGSTPVLTPGKTPIGTPAMNMATPTPGHIMSMTPEQLQAWRWEREIDERNRPLS
DEELDAMFPEGYKVLPPPAGYVPIRTPARKLTATPTPLGGMTGFHMQTEDRTMKSVNDQPSGNLPFLKPDDIQYFDKLLV
DVDESTLSPEEQKERKIMKLLLKIKNGTPPMRKAALRQITDKAREFGAGPLFNQILPLLMSPTLEDQERHLLVKVIDRIL
YKLDDLVRPYVHKILVVIEPLLIDEDYYARVEGREIISNLAKAAGLATMISTMRPDIDNMDEYVRNTTARAFAVVASALG
IPSLLPFLKAVCKSKKSWQARHTGIKIVQQIAILMGCAILPHLRSLVEIIEHGLVDEQQKVRTISALAIAALAEAATPYG
IESFDSVLKPLWKGIRQHRGKGLAAFLKAIGYLIPLMDAEYANYYTREVMLILIREFQSPDEEMKKIVLKVVKQCCGTDG
VEANYIKTEILPPFFKHFWQHRMALDRRNYRQLVDTTVELANKVGAAEIISRIVDDLKDEAEQYRKMVMETIEKIMGNLG
AADIDHKLEEQLIDGILYAFQEQTTEDSVMLNGFGTVVNALGKRVKPYLPQICGTVLWRLNNKSAKVRQQAADLISRTAV
VMKTCQEEKLMGHLGVVLYEYLGEEYPEVLGSILGALKAIVNVIGMHKMTPPIKDLLPRLTPILKNRHEKVQENCIDLVG
RIADRGAEYVSAREWMRICFELLELLKAHKKAIRRATVNTFGYIAKAIGPHDVLATLLNNLKVQERQNRVCTTVAIAIVA
ETCSPFTVLPALMNEYRVPELNVQNGVLKSLSFLFEYIGEMGKDYIYAVTPLLEDALMDRDLVHRQTASAVVQHMSLGVY
GFGCEDSLNHLLNYVWPNVFETSPHVIQAVMGALEGLRVAIGPCRMLQYCLQGLFHPARKVRDVYWKIYNSIYIGSQDAL
IAHYPRIYNDDKNTYIRYELDYIL</string>
                    <external_references type="UNIPROTKB">O75533</external_references>
                </sequence>
            </protein_or_peptide>
            <protein_or_peptide macromolecule_id="3">
                <name>Splicing factor 3B subunit 2</name>
                <natural_source database="NCBI">
                    <organism ncbi="9606">Homo sapiens</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.100377812</theoretical>
                </molecular_weight>
                <number_of_copies>1</number_of_copies>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>MATEHPEPPKAELQLPPPPPPGHYGAWAAQELQAKLAEIGAPIQGNREELVERLQSYTRQTGIVLNRPVLRGEDGDKAAP
PPMSAQLPGIPMPPPPLGLPPLQPPPPPPPPPPGLGLGFPMAHPPNLGPPPPLRVGEPVALSEEERLKLAQQQAALLMQQ
EERAKQQGDHSLKEHELLEQQKRAAVLLEQERQQEIAKMGTPVPRPPQDMGQIGVRTPLGPRVAAPVGPVGPTPTVLPMG
APVPRPRGPPPPPGDENREMDDPSVGPKIPQALEKILQLKESRQEEMNSQQEEEEMETDARSSLGQSASETEEDTVSVSK
KEKNRKRRNRKKKKKPQRVRGVSSESSGDREKDSTRSRGSDSPAADVEIEYVTEEPEIYEPNFIFFKRIFEAFKLTDDVK
KEKEKEPEKLDKLENSAAPKKKGFEEEHKDSDDDSSDDEQEKKPEAPKLSKKKLRRMNRFTVAELKQLVARPDVVEMHDV
TAQDPKLLVHLKATRNSVPVPRHWCFKRKYLQGKRGIEKPPFELPDFIKRTGIQEMREALQEKEEQKTMKSKMREKVRPK
MGKIDIDYQKLHDAFFKWQTKPKLTIHGDLYYEGKEFETRLKEKKPGDLSDELRISLGMPVGPNAHKVPPPWLIAMQRYG
PPPSYPNLKIPGLNSPIPESCSFGYHAGGWGKPPVDETGKPLYGDVFGTNAAEFQTKTEEEEIDRTPWGELEPSDEESSE
EEEEEESDEDKPDETGFITPADSGLITPGGFSSVPAGMETPELIELRKKKIEEAMDGSETPQLFTVLPEKRTATVGGAMM
GSTHIYDMSTVMSRKGPAPELQGVEVALAPEELELDPMAMTQKYEEHVREQQAQVEKEDFSDMVAEHAAKQKQKKRKAQP
QDSRGGSKKYKEFKF</string>
                    <external_references type="UNIPROTKB">Q13435</external_references>
                </sequence>
            </protein_or_peptide>
            <protein_or_peptide macromolecule_id="4">
                <name>Splicing factor 3B subunit 3</name>
                <natural_source database="NCBI">
                    <organism ncbi="9606">Homo sapiens</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.135718844</theoretical>
                </molecular_weight>
                <number_of_copies>1</number_of_copies>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>MFLYNLTLQRATGISFAIHGNFSGTKQQEIVVSRGKILELLRPDPNTGKVHTLLTVEVFGVIRSLMAFRLTGGTKDYIVV
GSDSGRIVILEYQPSKNMFEKIHQETFGKSGCRRIVPGQFLAVDPKGRAVMISAIEKQKLVYILNRDAAARLTISSPLEA
HKANTLVYHVVGVDVGFENPMFACLEMDYEEADNDPTGEAAANTQQTLTFYELDLGLNHVVRKYSEPLEEHGNFLITVPG
GSDGPSGVLICSENYITYKNFGDQPDIRCPIPRRRNDLDDPERGMIFVCSATHKTKSMFFFLAQTEQGDIFKITLETDED
MVTEIRLKYFDTVPVAAAMCVLKTGFLFVASEFGNHYLYQIAHLGDDDEEPEFSSAMPLEEGDTFFFQPRPLKNLVLVDE
LDSLSPILFCQIADLANEDTPQLYVACGRGPRSSLRVLRHGLEVSEMAVSELPGNPNAVWTVRRHIEDEFDAYIIVSFVN
ATLVLSIGETVEEVTDSGFLGTTPTLSCSLLGDDALVQVYPDGIRHIRADKRVNEWKTPGKKTIVKCAVNQRQVVIALTG
GELVYFEMDPSGQLNEYTERKEMSADVVCMSLANVPPGEQRSRFLAVGLVDNTVRIISLDPSDCLQPLSMQALPAQPESL
CIVEMGGTEKQDELGERGSIGFLYLNIGLQNGVLLRTVLDPVTGDLSDTRTRYLGSRPVKLFRVRMQGQEAVLAMSSRSW
LSYSYQSRFHLTPLSYETLEFASGFASEQCPEGIVAISTNTLRILALEKLGAVFNQVAFPLQYTPRKFVIHPESNNLIII
ETDHNAYTEATKAQRKQQMAEEMVEAAGEDERELAAEMAAAFLNENLPESIFGAPKAGNGQWASVIRVMNPIQGNTLDLV
QLEQNEAAFSVAVCRFSNTGEDWYVLVGVAKDLILNPRSVAGGFVYTYKLVNNGEKLEFLHKTPVEEVPAAIAPFQGRVL
IGVGKLLRVYDLGKKKLLRKCENKHIANYISGIQTIGHRVIVSDVQESFIWVRYKRNENQLIIFADDTYPRWVTTASLLD
YDTVAGADKFGNICVVRLPPNTNDEVDEDPTGNKALWDRGLLNGASQKAEVIMNYHVGETVLSLQKTTLIPGGSESLVYT
TLSGGIGILVPFTSHEDHDFFQHVEMHLRSEHPPLCGRDHLSFRSYYFPVKNVIDGDLCEQFNSMEPNKQKNVSEELDRT
PPEVSKKLEDIRTRYAF</string>
                    <external_references type="UNIPROTKB">Q15393</external_references>
                </sequence>
            </protein_or_peptide>
            <protein_or_peptide macromolecule_id="5">
                <name>Splicing factor 3B subunit 4</name>
                <natural_source database="NCBI">
                    <organism ncbi="9606">Homo sapiens</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.044436569999999995</theoretical>
                </molecular_weight>
                <number_of_copies>1</number_of_copies>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>MAAGPISERNQDATVYVGGLDEKVSEPLLWELFLQAGPVVNTHMPKDRVTGQHQGYGFVEFLSEEDADYAIKIMNMIKLY
GKPIRVNKASAHNKNLDVGANIFIGNLDPEIDEKLLYDTFSAFGVILQTPKIMRDPDTGNSKGYAFINFASFDASDAAIE
AMNGQYLCNRPITVSYAFKKDSKGERHGSAAERLLAAQNPLSQADRPHQLFADAPPPPSAPNPVVSSLGSGLPPPGMPPP
GSFPPPVPPPGALPPGIPPAMPPPPMPPGAAGHGPPSAGTPGAGHPGHGHSHPHPFPPGGMPHPGMSQMQLAHHGPHGLG
HPHAGPPGSGGQPPPRPPPGMPHPGPPPMGMPPRGPPFGSPMGHPGPMPPHGMRGPPPLMPPHGYTGPPRPPPYGYQRGP
LPPPRPTPRPPVPPRGPLRGPLPQ</string>
                    <external_references type="UNIPROTKB">Q15427</external_references>
                </sequence>
            </protein_or_peptide>
            <protein_or_peptide macromolecule_id="6">
                <name>Splicing factor 3B subunit 5</name>
                <natural_source database="NCBI">
                    <organism ncbi="9606">Homo sapiens</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.010149369</theoretical>
                </molecular_weight>
                <number_of_copies>1</number_of_copies>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>MTDRYTIHSQLEHLQSKYIGTGHADTTKWEWLVNQHRDSYCSYMGHFDLLNYFAIAENESKARVRFNLMEKMLQPCGPPA
DKPEEN</string>
                    <external_references type="UNIPROTKB">Q9BWJ5</external_references>
                </sequence>
            </protein_or_peptide>
            <protein_or_peptide macromolecule_id="7">
                <name>PHD finger-like domain-containing protein 5A</name>
                <natural_source database="NCBI">
                    <organism ncbi="9606">Homo sapiens</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.012427523999999999</theoretical>
                </molecular_weight>
                <number_of_copies>1</number_of_copies>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>MAKHHPDLIFCRKQAGVAIGRLCEKCDGKCVICDSYVRPCTLVRICDECNYGSYQGRCVICGGPGVSDAYYCKECTIQEK
DRDGCPKIVNLGSSKTDLFYERKKYGFKKR</string>
                    <external_references type="UNIPROTKB">Q7RTV0</external_references>
                </sequence>
            </protein_or_peptide>
            <protein_or_peptide macromolecule_id="8">
                <name>Splicing factor 3A subunit 1</name>
                <natural_source database="NCBI">
                    <organism ncbi="9606">Homo sapiens</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.08899109399999999</theoretical>
                </molecular_weight>
                <number_of_copies>1</number_of_copies>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>MPAGPVQAVPPPPPVPTEPKQPTEEEASSKEDSAPSKPVVGIIYPPPEVRNIVDKTASFVARNGPEFEARIRQNEINNPK
FNFLNPNDPYHAYYRHKVSEFKEGKAQEPSAAIPKVMQQQQQTTQQQLPQKVQAQVIQETIVPKEPPPEFEFIADPPSIS
AFDLDVVKLTAQFVARNGRQFLTQLMQKEQRNYQFDFLRPQHSLFNYFTKLVEQYTKILIPPKGLFSKLKKEAENPREVL
DQVCYRVEWAKFQERERKKEEEEKEKERVAYAQIDWHDFVVVETVDFQPNEQGNFPPPTTPEELGARILIQERYEKFGES
EEVEMEVESDEEDDKQEKAEEPPSQLDQDTQVQDMDEGSDDEEEGQKVPPPPETPMPPPLPPTPDQVIVRKDYDPKASKP
LPPAPAPDEYLVSPITGEKIPASKMQEHMRIGLLDPRWLEQRDRSIREKQSDDEVYAPGLDIESSLKQLAERRTDIFGVE
ETAIGKKIGEEEIQKPEEKVTWDGHSGSMARTQQAAQANITLQEQIEAIHKAKGLVPEDDTKEKIGPSKPNEIPQQPPPP
SSATNIPSSAPPITSVPRPPTMPPPVRTTVVSAVPVMPRPPMASVVRLPPGSVIAPMPPIIHAPRINVVPMPPSAPPIMA
PRPPPMIVPTAFVPAPPVAPVPAPAPMPPVHPPPPMEDEPTSKKLKTEDSLMPEEEFLRRNKGPVSIKVQVPNMQDKTEW
KLNGQVLVFTLPLTDQVSVIKVKIHEATGMPAGKQKLQYEGIFIKDSNSLAYYNMANGAVIHLALKERGGRKK</string>
                    <external_references type="UNIPROTKB">Q15459</external_references>
                </sequence>
            </protein_or_peptide>
            <protein_or_peptide macromolecule_id="9">
                <name>Splicing factor 3A subunit 2</name>
                <natural_source database="NCBI">
                    <organism ncbi="9606">Homo sapiens</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.049327355</theoretical>
                </molecular_weight>
                <number_of_copies>1</number_of_copies>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>MDFQHRPGGKTGSGGVASSSESNRDRRERLRQLALETIDINKDPYFMKNHLGSYECKLCLTLHNNEGSYLAHTQGKKHQT
NLARRAAKEAKEAPAQPAPEKVKVEVKKFVKIGRPGYKVTKQRDSEMGQQSLLFQIDYPEIAEGIMPRHRFMSAYEQRIE
PPDRRWQYLLMAAEPYETIAFKVPSREIDKAEGKFWTHWNRETKQFFLQFHFKMEKPPAPPSLPAGPPGVKRPPPPLMNG
LPPRPPLPESLPPPPPGGLPLPPMPPTGPAPSGPPGPPQLPPPAPGVHPPAPVVHPPASGVHPPAPGVHPPAPGVHPPAP
GVHPPTSGVHPPAPGVHPPAPGVHPPAPGVHPPAPGVHPPAPGVHPPPSAGVHPQAPGVHPAAPAVHPQAPGVHPPAPGM
HPQAPGVHPQPPGVHPSAPGVHPQPPGVHPSNPGVHPPTPMPPMLRPPLPSEGPGNIPPPPPTN</string>
                    <external_references type="UNIPROTKB">Q15428</external_references>
                </sequence>
            </protein_or_peptide>
            <protein_or_peptide macromolecule_id="10">
                <name>Splicing factor 3A subunit 3</name>
                <natural_source database="NCBI">
                    <organism ncbi="9606">Homo sapiens</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.05893484399999999</theoretical>
                </molecular_weight>
                <number_of_copies>1</number_of_copies>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>METILEQQRRYHEEKERLMDVMAKEMLTKKSTLRDQINSDHRTRAMQDRYMEVSGNLRDLYDDKDGLRKEELNAISGPNE
FAEFYNRLKQIKEFHRKHPNEICVPMSVEFEELLKARENPSEEAQNLVEFTDEEGYGRYLDLHDCYLKYINLKASEKLDY
ITYLSIFDQLFDIPKERKNAEYKRYLEMLLEYLQDYTDRVKPLQDQNELFGKIQAEFEKKWENGTFPGWPKETSSALTHA
GAHLDLSAFSSWEELASLGLDRLKSALLALGLKCGGTLEERAQRLFSTKGKSLESLDTSLFAKNPKSKGTKRDTERNKDI
AFLEAQIYEYVEILGEQRHLTHENVQRKQARTGEEREEEEEEQISESESEDEENEIIYNPKNLPLGWDGKPIPYWLYKLH
GLNINYNCEICGNYTYRGPKAFQRHFAEWRHAHGMRCLGIPNTAHFANVTQIEDAVSLWAKLKLQKASERWQPDTEEEYE
DSSGNVVNKKTYEDLKRQGLL</string>
                    <external_references type="UNIPROTKB">Q12874</external_references>
                </sequence>
            </protein_or_peptide>
            <protein_or_peptide macromolecule_id="11">
                <name>HIV Tat-specific factor 1</name>
                <natural_source database="NCBI">
                    <organism ncbi="9606">Homo sapiens</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.085965961</theoretical>
                </molecular_weight>
                <number_of_copies>1</number_of_copies>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>MSGTNLDGNDEFDEQLRMQELYGDGKDGDTQTDAGGEPDSLGQQPTDTPYEWDLDKKAWFPKITEDFIATYQANYGFSND
GASSSTANVEDVHARTAEEPPQEKAPEPTDARKKGEKRKAESGWFHVEEDRNTNVYVSGLPPDITVDEFIQLMSKFGIIM
RDPQTEEFKVKLYKDNQGNLKGDGLCCYLKRESVELALKLLDEDEIRGYKLHVEVAKFQLKGEYDASKKKKKCKDYKKKL
SMQQKQLDWRPERRAGPSRMRHERVVIIKNMFHPMDFEDDPLVLNEIREDLRVECSKFGQIRKLLLFDRHPDGVASVSFR
DPEEADYCIQTLDGRWFGGRQITAQAWDGTTDYQVEETSREREERLRGWEAFLNAPEANRGLRRSDSVSASERAGPSRAR
HFSEHPSTSKMNAQETATGMAFEEPIDEKKFEKTEDGGEFEEGASENNAKESSPEKEAEEGCPEKESEEGCPKRGFEGSC
SQKESEEGNPVRGSEEDSPKKESKKKTLKNDCEENGLAKESEDDLNKESEEEVGPTKESEEDDSEKESDEDCSEKQSEDG
SEREFEENGLEKDLDEEGSEKELHENVLDKELEENDSENSEFEDDGSEKVLDEEGSEREFDEDSDEKEEEEDTYEKVFDD
ESDEKEDEEYADEKGLEAADKKAEEGDADEKLFEESDDKEDEDADGKEVEDADEKLFEDDDSNEKLFDEEEDSSEKLFDD
SDERGTLGGFGSVEEGPLSTGSSFILSSDDDDDDI</string>
                    <external_references type="UNIPROTKB">O43719</external_references>
                </sequence>
            </protein_or_peptide>
            <protein_or_peptide macromolecule_id="12">
                <name>RNA helicase</name>
                <natural_source database="NCBI">
                    <organism ncbi="9606">Homo sapiens</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.119807664</theoretical>
                </molecular_weight>
                <number_of_copies>1</number_of_copies>
                <recombinant_expression database="NCBI">
                    <recombinant_organism ncbi="9606">Homo sapiens</recombinant_organism>
                </recombinant_expression>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>MASDYKDDDDKASDEVDAGTMGRESRHYRKRSASRGRSGSRSRSRSPSDKRSKRGDDRRSRSRDRDRRRERSRSRDKRRS
RSRDRKRLRRSRSRERDRSRERRRSRSRDRRRSRSRSRGRRSRSSSPGNKSKKTENRSRSKEKTDGGESSKEKKKDKDDK
EDEKEKDAGNFDQNKLEEEMRKRKERVEKWREEQRKKAMENIGELKKEIEEMKQGKKWSLEDDDDDEDDPAEAEKEGNEM
EGEELDPLDAYMEEVKEEVKKFNMRSVKGGGGNEKKSGPTVTKVVTVVTTKKAVVDSDKKKGELMENDQDAMEYSSEEEE
VDLQTALTGYQTKQRKLLEPVDHGKIEYEPFRKNFYVEVPELAKMSQEEVNVFRLEMEGITVKGKGCPKPIKSWVQCGIS
MKILNSLKKHGYEKPTPIQTQAIPAIMSGRDLIGIAKTGSGKTIAFLLPMFRHIMDQRSLEEGEGPIAVIMTPTRELALQ
ITKECKKFSKTLGLRVVCVYGGTGISEQIAELKRGAEIIVCTPGRMIDMLAANSGRVTNLRRVTYVVLDEADRMFDMGFE
PQVMRIVDNVRPDRQTVMFSATFPRAMEALARRILSKPIEVQVGGRSVVCSDVEQQVIVIEEEKKFLKLLELLGHYQESG
SVIIFVDKQEHADGLLKDLMRASYPCMSLHGGIDQYDRDSIINDFKNGTCKLLVATSVAARGLDVKHLILVVNYSCPNHY
EDYVHRAGRTGRAGNKGYAYTFITEDQARYAGDIIKALELSGTAVPPDLEKLWSDFKDQQKAEGKIIKKSSGFSGKGFKF
DETEQALANERKKLQKAALGLQDSDDEDAAVDIDEQIESMFNSKKRVKDMAAPGTSSVPAPTAGNAEKLEIAKRLALRIN
AQKNLGIESQVDVMQQATNAILRGGTILAPTVSAKTIAEQLAEKINAKLNYVPLEKQEEERQDGGQNESFKRYEEELEIN
DFPQTARWKVTSKEALQRISEYSEAAITIRGTYFPPGKEPKEGERKIYLAIESANELAVQKAKAEITRLIKEELIRLQNS
YQPTNKGRYKVL</string>
                    <external_references type="UNIPROTKB">A0A0C4DG89</external_references>
                </sequence>
                <ec_number>3.6.4.13</ec_number>
            </protein_or_peptide>
            <protein_or_peptide macromolecule_id="13">
                <name>U2 small nuclear ribonucleoprotein A'</name>
                <natural_source database="NCBI">
                    <organism ncbi="9606">Homo sapiens</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.028456583999999997</theoretical>
                </molecular_weight>
                <number_of_copies>1</number_of_copies>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>MVKLTAELIEQAAQYTNAVRDRELDLRGYKIPVIENLGATLDQFDAIDFSDNEIRKLDGFPLLRRLKTLLVNNNRICRIG
EGLDQALPCLTELILTNNSLVELGDLDPLASLKSLTYLSILRNPVTNKKHYRLYVIYKVPQVRVLDFQKVKLKERQEAEK
MFKGKRGAQLAKDIARRSKTFNPGAGLPTDKKKGGPSPGDVEAIKNAIANASTLAEVERLKGLLQSGQIPGRERRSGPTD
DGEEEMEEDTVTNGS</string>
                    <external_references type="UNIPROTKB">P09661</external_references>
                </sequence>
            </protein_or_peptide>
            <protein_or_peptide macromolecule_id="14">
                <name>U2 small nuclear ribonucleoprotein B''</name>
                <natural_source database="NCBI">
                    <organism ncbi="9606">Homo sapiens</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.025524366999999996</theoretical>
                </molecular_weight>
                <number_of_copies>1</number_of_copies>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>MDIRPNHTIYINNMNDKIKKEELKRSLYALFSQFGHVVDIVALKTMKMRGQAFVIFKELGSSTNALRQLQGFPFYGKPMR
IQYAKTDSDIISKMRGTFADKEKKKEKKKAKTVEQTATTTNKKPGQGTPNSANTQGNSTPNPQVPDYPPNYILFLNNLPE
ETNEMMLSMLFNQFPGFKEVRLVPGRHDIAFVEFENDGQAGAARDALQGFKITPSHAMKITYAKK</string>
                    <external_references type="UNIPROTKB">P08579</external_references>
                </sequence>
            </protein_or_peptide>
            <protein_or_peptide macromolecule_id="15">
                <name>Small nuclear ribonucleoprotein Sm D2</name>
                <natural_source database="NCBI">
                    <organism ncbi="9606">Homo sapiens</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.013551928</theoretical>
                </molecular_weight>
                <number_of_copies>1</number_of_copies>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>MSLLNKPKSEMTPEELQKREEEEFNTGPLSVLTQSVKNNTQVLINCRNNKKLLGRVKAFDRHCNMVLENVKEMWTEVPKS
GKGKKKSKPVNKDRYISKMFLRGDSVIVVLRNPLIAGK</string>
                    <external_references type="UNIPROTKB">P62316</external_references>
                </sequence>
            </protein_or_peptide>
            <protein_or_peptide macromolecule_id="16">
                <name>Small nuclear ribonucleoprotein F</name>
                <natural_source database="NCBI">
                    <organism ncbi="9606">Homo sapiens</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.009734171</theoretical>
                </molecular_weight>
                <number_of_copies>1</number_of_copies>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>MSLPLNPKPFLNGLTGKPVMVKLKWGMEYKGYLVSVDGYMNMQLANTEEYIDGALSGHLGEVLIRCNNVLYIRGVEEEEE
DGEMRE</string>
                    <external_references type="UNIPROTKB">P62306</external_references>
                </sequence>
            </protein_or_peptide>
            <protein_or_peptide macromolecule_id="17">
                <name>Small nuclear ribonucleoprotein E</name>
                <natural_source database="NCBI">
                    <organism ncbi="9606">Homo sapiens</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.010817601</theoretical>
                </molecular_weight>
                <number_of_copies>1</number_of_copies>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>MAYRGQGQKVQKVMVQPINLIFRYLQNRSRIQVWLYEQVNMRIEGCIIGFDEYMNLVLDDAEEIHSKTKSRKQLGRIMLK
GDNITLLQSVSN</string>
                    <external_references type="UNIPROTKB">P62304</external_references>
                </sequence>
            </protein_or_peptide>
            <protein_or_peptide macromolecule_id="18">
                <name>Small nuclear ribonucleoprotein G</name>
                <natural_source database="NCBI">
                    <organism ncbi="9606">Homo sapiens</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.008508084</theoretical>
                </molecular_weight>
                <number_of_copies>1</number_of_copies>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>MSKAHPPELKKFMDKKLSLKLNGGRHVQGILRGFDPFMNLVIDECVEMATSGQQNNIGMVVIRGNSIIMLEALERV</string>
                    <external_references type="UNIPROTKB">P62308</external_references>
                </sequence>
            </protein_or_peptide>
            <protein_or_peptide macromolecule_id="19">
                <name>Small nuclear ribonucleoprotein Sm D3</name>
                <natural_source database="NCBI">
                    <organism ncbi="9606">Homo sapiens</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.013940308</theoretical>
                </molecular_weight>
                <number_of_copies>1</number_of_copies>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>MSIGVPIKVLHEAEGHIVTCETNTGEVYRGKLIEAEDNMNCQMSNITVTYRDGRVAQLEQVYIRGSKIRFLILPDMLKNA
PMLKSMKNKNQGSGAGRGKAAILKAQVAARGRGRGMGRGNIFQKRR</string>
                    <external_references type="UNIPROTKB">P62318</external_references>
                </sequence>
            </protein_or_peptide>
            <protein_or_peptide macromolecule_id="20">
                <name>Small nuclear ribonucleoprotein-associated proteins B and B'</name>
                <natural_source database="NCBI">
                    <organism ncbi="9606">Homo sapiens</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.024642131</theoretical>
                </molecular_weight>
                <number_of_copies>1</number_of_copies>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>MTVGKSSKMLQHIDYRMRCILQDGRIFIGTFKAFDKHMNLILCDCDEFRKIKPKNSKQAEREEKRVLGLVLLRGENLVSM
TVEGPPPKDTGIARVPLAGAAGGPGIGRAAGRGIPAGVPMPQAPAGLAGPVRGVGGPSQQVMTPQGRGTVAAAAAAATAS
IAGAPTQYPPGRGGPPPPMGRGAPPPGMMGPPPGMRPPMGPPMGIPPGRGTPMGMPPPGMRPPPPGMRGPPPPGMRPPRP</string>
                    <external_references type="UNIPROTKB">P14678</external_references>
                </sequence>
            </protein_or_peptide>
            <protein_or_peptide macromolecule_id="21">
                <name>Small nuclear ribonucleoprotein Sm D1</name>
                <natural_source database="NCBI">
                    <organism ncbi="9606">Homo sapiens</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.013310653</theoretical>
                </molecular_weight>
                <number_of_copies>1</number_of_copies>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>MKLVRFLMKLSHETVTIELKNGTQVHGTITGVDVSMNTHLKAVKMTLKNREPVQLETLSIRGNNIRYFILPDSLPLDTLL
VDVEPKVKSKKREAVAGRGRGRGRGRGRGRGRGRGGPRR</string>
                    <external_references type="UNIPROTKB">P62314</external_references>
                </sequence>
            </protein_or_peptide>
            <ligand macromolecule_id="22">
                <name>[(2~{S},3~{S},4~{E},6~{S},7~{R},10~{R})-3,7-dimethyl-2-[(2~{E},4~{E},6~{R})-6-methyl-6-oxidanyl-7-[(2~{R},3~{R})-3-[(2~{R},3~{S})-3-oxidanylpentan-2-yl]oxiran-2-yl]hepta-2,4-dien-2-yl]-7,10-bis(oxidanyl)-12-oxidanylidene-1-oxacyclododec-4-en-6-yl] 4-cycloheptylpiperazine-1-carboxylate</name>
                <molecular_weight>
                    <theoretical units="MDa">0.00071896</theoretical>
                </molecular_weight>
                <number_of_copies>1</number_of_copies>
                <formula>9B0</formula>
            </ligand>
            <ligand macromolecule_id="23">
                <name>ZINC ION</name>
                <molecular_weight>
                    <theoretical units="MDa">6.5409e-05</theoretical>
                </molecular_weight>
                <number_of_copies>4</number_of_copies>
                <formula>ZN</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">0.5</concentration>
                    <buffer>
                        <ph>7.9</ph>
                    </buffer>
                    <grid>
                        <model>Quantifoil R1.2/1.3</model>
                        <material>GOLD</material>
                        <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>
                        <instrument>FEI VITROBOT MARK IV</instrument>
                    </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_cs units="mm">2.7</nominal_cs>
                    <specimen_holder_model>FEI TITAN KRIOS AUTOGRID HOLDER</specimen_holder_model>
                    <cooling_holder_cryogen>NITROGEN</cooling_holder_cryogen>
                    <image_recording_list>
                        <image_recording image_recording_id="1">
                            <film_or_detector_model>GATAN K3 (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>NONE</type>
                </ctf_correction>
                <startup_model type_of_model="OTHER">
                    <details>Initial model from CryoSparc</details>
                </startup_model>
                <final_reconstruction>
                    <algorithm>FOURIER SPACE</algorithm>
                    <resolution units="Å" res_type="BY AUTHOR">2.5</resolution>
                    <resolution_method>FSC 0.143 CUT-OFF</resolution_method>
                    <number_images_used>485418</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>
    <map format="CCP4" size_kbytes="131073">
        <file>emd_31334.map.gz</file>
        <symmetry>
            <space_group>1</space_group>
        </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>
            <sec>0</sec>
        </origin>
        <spacing>
            <x>320</x>
            <y>320</y>
            <z>320</z>
        </spacing>
        <cell>
            <a units="Å">347.84</a>
            <b units="Å">347.84</b>
            <c units="Å">347.84</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>-0.13542077</minimum>
            <maximum>0.256996</maximum>
            <average>-0.000030762432</average>
            <std>0.005267128</std>
        </statistics>
        <pixel_spacing>
            <x units="Å">1.087</x>
            <y units="Å">1.087</y>
            <z units="Å">1.087</z>
        </pixel_spacing>
        <contour_list>
            <contour primary="true">
                <level>0.02</level>
                <source>AUTHOR</source>
            </contour>
        </contour_list>
        <label>::::EMDATABANK.org::::EMD-31334::::</label>
        <annotation_details>The EM map of U2 snRNP</annotation_details>
    </map>
</emd>
