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    <source releaseDate="2022-02-04">
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        <shortLabel>IntAct</shortLabel>
        <fullName>European Bioinformatics Institute</fullName>
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        <attribute name="definition">INTerAction database (IntAct) provides an open source database and toolkit for the storage, presentation and analysis of molecular interactions.</attribute>
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        <attribute name="postaladdress">European Bioinformatics Institute; Wellcome Trust Genome Campus; Hinxton, Cambridge; CB10 1SD; United Kingdom</attribute>
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    </source>
    <experimentList>
      <experimentDescription id="1">
        <names>
          <fullName>Structural mechanism of Smad4 recognition by the nuclear oncoprotein Ski: insights on Ski-mediated repression of TGF-beta signaling.</fullName>
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            <attribute name="publication title" nameAc="MI:1091">Structural mechanism of Smad4 recognition by the nuclear oncoprotein Ski: insights on Ski-mediated repression of TGF-beta signaling.</attribute>
            <attribute name="journal" nameAc="MI:0885">Cell (0092-8674)</attribute>
            <attribute name="publication year" nameAc="MI:0886">2002</attribute>
            <attribute name="author-list" nameAc="MI:0636">Wu JW., Krawitz AR., Chai J., Li W., Zhang F., Luo K., Shi Y.</attribute>
            <attribute name="dataset" nameAc="MI:0875">PDBe - Data obtained from the Protein Data Bank Europe</attribute>
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              <shortLabel>in vitro</shortLabel>
              <fullName>In vitro</fullName>
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            <shortLabel>x-ray diffraction</shortLabel>
            <fullName>x-ray crystallography</fullName>
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        </interactionDetectionMethod>
        <participantIdentificationMethod>
          <names>
            <shortLabel>predetermined</shortLabel>
            <fullName>predetermined participant</fullName>
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        <attributeList>
          <attribute name="author-list" nameAc="MI:0636">Wu JW., Krawitz AR., Chai J., Li W., Zhang F., Luo K., Shi Y.</attribute>
          <attribute name="dataset" nameAc="MI:0875">PDBe - Data obtained from the Protein Data Bank Europe</attribute>
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        <names>
          <shortLabel>smad4_human</shortLabel>
          <fullName>Mothers against decapentaplegic homolog 4</fullName>
          <alias type="gene name" typeAc="MI:0301">SMAD4</alias>
          <alias type="gene name synonym" typeAc="MI:0302">DPC4</alias>
          <alias type="gene name synonym" typeAc="MI:0302">MADH4</alias>
          <alias type="gene name synonym" typeAc="MI:0302">SMAD family member 4</alias>
          <alias type="gene name synonym" typeAc="MI:0302">Deletion target in pancreatic carcinoma 4</alias>
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        <interactorType>
          <names>
            <shortLabel>protein</shortLabel>
            <fullName>protein</fullName>
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          <names>
            <shortLabel>human</shortLabel>
            <fullName>Homo sapiens</fullName>
            <alias type="synonym" typeAc="MI:1041">Human</alias>
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        </organism>
        <sequence>MDNMSITNTPTSNDACLSIVHSLMCHRQGGESETFAKRAIESLVKKLKEKKDELDSLITAITTNGAHPSKCVTIQRTLDGRLQVAGRKGFPHVIYARLWRWPDLHKNELKHVKYCQYAFDLKCDSVCVNPYHYERVVSPGIDLSGLTLQSNAPSSMMVKDEYVHDFEGQPSLSTEGHSIQTIQHPPSNRASTETYSTPALLAPSESNATSTANFPNIPVASTSQPASILGGSHSEGLLQIASGPQPGQQQNGFTGQPATYHHNSTTTWTGSRTAPYTPNLPHHQNGHLQHHPPMPPHPGHYWPVHNELAFQPPISNHPAPEYWCSIAYFEMDVQVGETFKVPSSCPIVTVDGYVDPSGGDRFCLGQLSNVHRTEAIERARLHIGKGVQLECKGEGDVWVRCLSDHAVFVQSYYLDREAGRAPGDAVHKIYPSAYIKVFDLRQCHRQMQQQAATAQAAAAAQAAAVAGNIPGPGSVGGIAPAISLSAAAGIGVDDLRRLCILRMSFVKGWGPDYPRQSIKETPCWIEIHLHRALQLLDEVLHTMPIADPQPLD</sequence>
        <attributeList>
          <attribute name="remark-internal">DIP protein Q13485 original sequence version: 149</attribute>
          <attribute name="remark-internal">DIP protein Q13485 original sequence version: 177</attribute>
          <attribute name="crc64">7EE3C4647712DA90</attribute>
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      </interactor>
      <interactor id="3">
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          <shortLabel>ski_human</shortLabel>
          <fullName>Ski oncogene</fullName>
          <alias type="gene name" typeAc="MI:0301">SKI</alias>
          <alias type="gene name synonym" typeAc="MI:0302">Proto-oncogene c-Ski</alias>
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          <secondaryRef db="go" dbAc="MI:0448" id="GO:0005813" version="SP_200"/>
          <secondaryRef db="go" dbAc="MI:0448" id="GO:0006351" version="SP_200"/>
          <secondaryRef db="go" dbAc="MI:0448" id="GO:0007179" version="SP_200"/>
          <secondaryRef db="go" dbAc="MI:0448" id="GO:0008270" version="SP_200"/>
          <secondaryRef db="go" dbAc="MI:0448" id="GO:0008285" version="SP_200"/>
          <secondaryRef db="go" dbAc="MI:0448" id="GO:0009948" version="SP_200"/>
          <secondaryRef db="go" dbAc="MI:0448" id="GO:0010626" version="SP_200"/>
          <secondaryRef db="go" dbAc="MI:0448" id="GO:0014902" version="SP_200"/>
          <secondaryRef db="go" dbAc="MI:0448" id="GO:0016604" version="SP_200"/>
          <secondaryRef db="go" dbAc="MI:0448" id="GO:0016605" version="SP_200"/>
          <secondaryRef db="go" dbAc="MI:0448" id="GO:0017053" version="SP_200"/>
          <secondaryRef db="go" dbAc="MI:0448" id="GO:0019901" version="SP_200"/>
          <secondaryRef db="go" dbAc="MI:0448" id="GO:0019904" version="SP_200"/>
          <secondaryRef db="go" dbAc="MI:0448" id="GO:0021772" version="SP_200"/>
          <secondaryRef db="go" dbAc="MI:0448" id="GO:0022011" version="SP_200"/>
          <secondaryRef db="go" dbAc="MI:0448" id="GO:0030177" version="SP_200"/>
          <secondaryRef db="go" dbAc="MI:0448" id="GO:0030326" version="SP_200"/>
          <secondaryRef db="go" dbAc="MI:0448" id="GO:0030512" version="SP_200"/>
          <secondaryRef db="go" dbAc="MI:0448" id="GO:0031625" version="SP_200"/>
          <secondaryRef db="go" dbAc="MI:0448" id="GO:0032926" version="SP_200"/>
          <secondaryRef db="go" dbAc="MI:0448" id="GO:0032991" version="SP_200"/>
          <secondaryRef db="go" dbAc="MI:0448" id="GO:0035019" version="SP_200"/>
          <secondaryRef db="go" dbAc="MI:0448" id="GO:0042802" version="SP_200"/>
          <secondaryRef db="go" dbAc="MI:0448" id="GO:0043010" version="SP_200"/>
          <secondaryRef db="go" dbAc="MI:0448" id="GO:0043388" version="SP_200"/>
          <secondaryRef db="go" dbAc="MI:0448" id="GO:0043585" version="SP_200"/>
          <secondaryRef db="go" dbAc="MI:0448" id="GO:0045668" version="SP_200"/>
          <secondaryRef db="go" dbAc="MI:0448" id="GO:0045944" version="SP_200"/>
          <secondaryRef db="go" dbAc="MI:0448" id="GO:0046332" version="SP_200"/>
          <secondaryRef db="go" dbAc="MI:0448" id="GO:0046811" version="SP_200"/>
          <secondaryRef db="go" dbAc="MI:0448" id="GO:0048147" version="SP_200"/>
          <secondaryRef db="go" dbAc="MI:0448" id="GO:0048593" version="SP_200"/>
          <secondaryRef db="go" dbAc="MI:0448" id="GO:0048741" version="SP_200"/>
          <secondaryRef db="go" dbAc="MI:0448" id="GO:0048870" version="SP_200"/>
          <secondaryRef db="go" dbAc="MI:0448" id="GO:0060021" version="SP_200"/>
          <secondaryRef db="go" dbAc="MI:0448" id="GO:0060041" version="SP_200"/>
          <secondaryRef db="go" dbAc="MI:0448" id="GO:0030514" version="SP_200"/>
          <secondaryRef db="go" dbAc="MI:0448" id="GO:0060325" version="SP_200"/>
          <secondaryRef db="go" dbAc="MI:0448" id="GO:0060349" version="SP_200"/>
          <secondaryRef db="go" dbAc="MI:0448" id="GO:0060395" version="SP_200"/>
          <secondaryRef db="go" dbAc="MI:0448" id="GO:0140297" version="SP_200"/>
          <secondaryRef db="interpro" dbAc="MI:0449" id="IPR003380" version="SP_200"/>
          <secondaryRef db="interpro" dbAc="MI:0449" id="IPR009061" version="SP_200"/>
          <secondaryRef db="interpro" dbAc="MI:0449" id="IPR010919" version="SP_200"/>
          <secondaryRef db="interpro" dbAc="MI:0449" id="IPR014890" version="SP_200"/>
          <secondaryRef db="interpro" dbAc="MI:0449" id="IPR023216" version="SP_200"/>
          <secondaryRef db="interpro" dbAc="MI:0449" id="IPR028760" version="SP_200"/>
          <secondaryRef db="interpro" dbAc="MI:0449" id="IPR037000" version="SP_200"/>
          <secondaryRef db="rcsb pdb" dbAc="MI:0460" id="1MR1" version="SP_200"/>
          <secondaryRef db="rcsb pdb" dbAc="MI:0460" id="1SBX" version="SP_200"/>
          <secondaryRef db="rcsb pdb" dbAc="MI:0460" id="5XOD" version="SP_200"/>
          <secondaryRef db="rcsb pdb" dbAc="MI:0460" id="6ZVQ" version="SP_200"/>
          <secondaryRef db="reactome" dbAc="MI:0467" id="R-HSA-201451" version="SP_200"/>
          <secondaryRef db="reactome" dbAc="MI:0467" id="R-HSA-2173795" version="SP_200"/>
          <secondaryRef db="dip" dbAc="MI:0465" id="DIP-31514N"/>
        </xref>
        <interactorType>
          <names>
            <shortLabel>protein</shortLabel>
            <fullName>protein</fullName>
          </names>
          <xref>
            <primaryRef db="psi-mi" dbAc="MI:0488" id="MI:0326" refType="identity" refTypeAc="MI:0356"/>
            <secondaryRef db="intact" dbAc="MI:0469" id="EBI-619654" refType="identity" refTypeAc="MI:0356"/>
            <secondaryRef db="pubmed" dbAc="MI:0446" id="14755292" refType="primary-reference" refTypeAc="MI:0358"/>
            <secondaryRef db="so" dbAc="MI:0601" id="SO:0000358" refType="see-also" refTypeAc="MI:0361"/>
          </xref>
        </interactorType>
        <organism ncbiTaxId="9606">
          <names>
            <shortLabel>human</shortLabel>
            <fullName>Homo sapiens</fullName>
            <alias type="synonym" typeAc="MI:1041">Human</alias>
          </names>
        </organism>
        <sequence>MEAAAGGRGCFQPHPGLQKTLEQFHLSSMSSLGGPAAFSARWAQEAYKKESAKEAGAAAVPAPVPAATEPPPVLHLPAIQPPPPVLPGPFFMPSDRSTERCETVLEGETISCFVVGGEKRLCLPQILNSVLRDFSLQQINAVCDELHIYCSRCTADQLEILKVMGILPFSAPSCGLITKTDAERLCNALLYGGAYPPPCKKELAASLALGLELSERSVRVYHECFGKCKGLLVPELYSSPSAACIQCLDCRLMYPPHKFVVHSHKALENRTCHWGFDSANWRAYILLSQDYTGKEEQARLGRCLDDVKEKFDYGNKYKRRVPRVSSEPPASIRPKTDDTSSQSPAPSEKDKPSSWLRTLAGSSNKSLGCVHPRQRLSAFRPWSPAVSASEKELSPHLPALIRDSFYSYKSFETAVAPNVALAPPAQQKVVSSPPCAAAVSRAPEPLATCTQPRKRKLTVDTPGAPETLAPVAAPEEDKDSEAEVEVESREEFTSSLSSLSSPSFTSSSSAKDLGSPGARALPSAVPDAAAPADAPSGLEAELEHLRQALEGGLDTKEAKEKFLHEVVKMRVKQEEKLSAALQAKRSLHQELEFLRVAKKEKLREATEAKRNLRKEIERLRAENEKKMKEANESRLRLKRELEQARQARVCDKGCEAGRLRAKYSAQIEDLQVKLQHAEADREQLRADLLREREAREHLEKVVKELQEQLWPRARPEAAGSEGAAELEP</sequence>
        <attributeList>
          <attribute name="remark-internal">DIP protein P12755 original sequence version: 126</attribute>
          <attribute name="remark-internal">DIP protein P12755 original sequence version: 130</attribute>
          <attribute name="crc64">9B78C4840A28C2DA</attribute>
        </attributeList>
      </interactor>
    </interactorList>
    <interactionList>
      <interaction id="4">
        <names>
          <shortLabel>ski-smad4-1</shortLabel>
        </names>
        <xref>
          <primaryRef db="rcsb pdb" dbAc="MI:0460" id="1MR1" refType="identity" refTypeAc="MI:0356"/>
          <secondaryRef db="intact" dbAc="MI:0469" id="EBI-1034780" refType="identity" refTypeAc="MI:0356"/>
        </xref>
        <experimentList>
          <experimentRef>1</experimentRef>
        </experimentList>
        <participantList>
          <participant id="5">
            <interactorRef>3</interactorRef>
            <biologicalRole>
              <names>
                <shortLabel>unspecified role</shortLabel>
                <fullName>unspecified role</fullName>
              </names>
              <xref>
                <primaryRef db="psi-mi" dbAc="MI:0488" id="MI:0499" refType="identity" refTypeAc="MI:0356"/>
                <secondaryRef db="intact" dbAc="MI:0469" id="EBI-77781" refType="identity" refTypeAc="MI:0356"/>
                <secondaryRef db="pubmed" dbAc="MI:0446" id="14755292" refType="primary-reference" refTypeAc="MI:0358"/>
              </xref>
            </biologicalRole>
            <experimentalRoleList>
              <experimentalRole>
                <names>
                  <shortLabel>neutral component</shortLabel>
                  <fullName>neutral component</fullName>
                </names>
                <xref>
                  <primaryRef db="psi-mi" dbAc="MI:0488" id="MI:0497" refType="identity" refTypeAc="MI:0356"/>
                  <secondaryRef db="intact" dbAc="MI:0469" id="EBI-55" refType="identity" refTypeAc="MI:0356"/>
                  <secondaryRef db="pubmed" dbAc="MI:0446" id="14755292" refType="primary-reference" refTypeAc="MI:0358"/>
                </xref>
              </experimentalRole>
            </experimentalRoleList>
            <featureList>
              <feature id="6">
                <names>
                  <shortLabel>region</shortLabel>
                </names>
                <xref>
                  <primaryRef db="intact" dbAc="MI:0469" id="EBI-1034785" refType="identity" refTypeAc="MI:0356"/>
                </xref>
                <featureType>
                  <names>
                    <shortLabel>sufficient to bind</shortLabel>
                    <fullName>sufficient binding region</fullName>
                    <alias type="synonym" typeAc="MI:1041">sufficient to bind</alias>
                  </names>
                  <xref>
                    <primaryRef db="psi-mi" dbAc="MI:0488" id="MI:0442" refType="identity" refTypeAc="MI:0356"/>
                    <secondaryRef db="intact" dbAc="MI:0469" id="EBI-608899" refType="identity" refTypeAc="MI:0356"/>
                    <secondaryRef db="pubmed" dbAc="MI:0446" id="14755292" refType="primary-reference" refTypeAc="MI:0358"/>
                  </xref>
                </featureType>
                <featureRangeList>
                  <featureRange>
                    <startStatus>
                      <names>
                        <shortLabel>certain</shortLabel>
                        <fullName>certain sequence position</fullName>
                        <alias type="synonym" typeAc="MI:1041">certain</alias>
                      </names>
                      <xref>
                        <primaryRef db="psi-mi" dbAc="MI:0488" id="MI:0335" refType="identity" refTypeAc="MI:0356"/>
                        <secondaryRef db="intact" dbAc="MI:0469" id="EBI-540564" refType="identity" refTypeAc="MI:0356"/>
                        <secondaryRef db="pubmed" dbAc="MI:0446" id="14755292" refType="primary-reference" refTypeAc="MI:0358"/>
                      </xref>
                    </startStatus>
                    <begin position="219"/>
                    <endStatus>
                      <names>
                        <shortLabel>certain</shortLabel>
                        <fullName>certain sequence position</fullName>
                        <alias type="synonym" typeAc="MI:1041">certain</alias>
                      </names>
                      <xref>
                        <primaryRef db="psi-mi" dbAc="MI:0488" id="MI:0335" refType="identity" refTypeAc="MI:0356"/>
                        <secondaryRef db="intact" dbAc="MI:0469" id="EBI-540564" refType="identity" refTypeAc="MI:0356"/>
                        <secondaryRef db="pubmed" dbAc="MI:0446" id="14755292" refType="primary-reference" refTypeAc="MI:0358"/>
                      </xref>
                    </endStatus>
                    <end position="313"/>
                  </featureRange>
                </featureRangeList>
              </feature>
            </featureList>
            <hostOrganismList>
              <hostOrganism ncbiTaxId="83333">
                <names>
                  <shortLabel>ecoli</shortLabel>
                  <fullName>Escherichia coli (strain K12)</fullName>
                </names>
              </hostOrganism>
            </hostOrganismList>
            <stoichiometry value="2"/>
          </participant>
          <participant id="7">
            <interactorRef>2</interactorRef>
            <biologicalRole>
              <names>
                <shortLabel>unspecified role</shortLabel>
                <fullName>unspecified role</fullName>
              </names>
              <xref>
                <primaryRef db="psi-mi" dbAc="MI:0488" id="MI:0499" refType="identity" refTypeAc="MI:0356"/>
                <secondaryRef db="intact" dbAc="MI:0469" id="EBI-77781" refType="identity" refTypeAc="MI:0356"/>
                <secondaryRef db="pubmed" dbAc="MI:0446" id="14755292" refType="primary-reference" refTypeAc="MI:0358"/>
              </xref>
            </biologicalRole>
            <experimentalRoleList>
              <experimentalRole>
                <names>
                  <shortLabel>neutral component</shortLabel>
                  <fullName>neutral component</fullName>
                </names>
                <xref>
                  <primaryRef db="psi-mi" dbAc="MI:0488" id="MI:0497" refType="identity" refTypeAc="MI:0356"/>
                  <secondaryRef db="intact" dbAc="MI:0469" id="EBI-55" refType="identity" refTypeAc="MI:0356"/>
                  <secondaryRef db="pubmed" dbAc="MI:0446" id="14755292" refType="primary-reference" refTypeAc="MI:0358"/>
                </xref>
              </experimentalRole>
            </experimentalRoleList>
            <featureList>
              <feature id="8">
                <names>
                  <shortLabel>region</shortLabel>
                </names>
                <xref>
                  <primaryRef db="intact" dbAc="MI:0469" id="EBI-1034782" refType="identity" refTypeAc="MI:0356"/>
                </xref>
                <featureType>
                  <names>
                    <shortLabel>sufficient to bind</shortLabel>
                    <fullName>sufficient binding region</fullName>
                    <alias type="synonym" typeAc="MI:1041">sufficient to bind</alias>
                  </names>
                  <xref>
                    <primaryRef db="psi-mi" dbAc="MI:0488" id="MI:0442" refType="identity" refTypeAc="MI:0356"/>
                    <secondaryRef db="intact" dbAc="MI:0469" id="EBI-608899" refType="identity" refTypeAc="MI:0356"/>
                    <secondaryRef db="pubmed" dbAc="MI:0446" id="14755292" refType="primary-reference" refTypeAc="MI:0358"/>
                  </xref>
                </featureType>
                <featureRangeList>
                  <featureRange>
                    <startStatus>
                      <names>
                        <shortLabel>certain</shortLabel>
                        <fullName>certain sequence position</fullName>
                        <alias type="synonym" typeAc="MI:1041">certain</alias>
                      </names>
                      <xref>
                        <primaryRef db="psi-mi" dbAc="MI:0488" id="MI:0335" refType="identity" refTypeAc="MI:0356"/>
                        <secondaryRef db="intact" dbAc="MI:0469" id="EBI-540564" refType="identity" refTypeAc="MI:0356"/>
                        <secondaryRef db="pubmed" dbAc="MI:0446" id="14755292" refType="primary-reference" refTypeAc="MI:0358"/>
                      </xref>
                    </startStatus>
                    <begin position="319"/>
                    <endStatus>
                      <names>
                        <shortLabel>certain</shortLabel>
                        <fullName>certain sequence position</fullName>
                        <alias type="synonym" typeAc="MI:1041">certain</alias>
                      </names>
                      <xref>
                        <primaryRef db="psi-mi" dbAc="MI:0488" id="MI:0335" refType="identity" refTypeAc="MI:0356"/>
                        <secondaryRef db="intact" dbAc="MI:0469" id="EBI-540564" refType="identity" refTypeAc="MI:0356"/>
                        <secondaryRef db="pubmed" dbAc="MI:0446" id="14755292" refType="primary-reference" refTypeAc="MI:0358"/>
                      </xref>
                    </endStatus>
                    <end position="552"/>
                  </featureRange>
                </featureRangeList>
              </feature>
            </featureList>
            <hostOrganismList>
              <hostOrganism ncbiTaxId="83333">
                <names>
                  <shortLabel>ecoli</shortLabel>
                  <fullName>Escherichia coli (strain K12)</fullName>
                </names>
              </hostOrganism>
            </hostOrganismList>
            <stoichiometry value="2"/>
          </participant>
        </participantList>
        <interactionType>
          <names>
            <shortLabel>direct interaction</shortLabel>
            <fullName>direct interaction</fullName>
          </names>
          <xref>
            <primaryRef db="psi-mi" dbAc="MI:0488" id="MI:0407" refType="identity" refTypeAc="MI:0356"/>
            <secondaryRef db="intact" dbAc="MI:0469" id="EBI-608833" refType="identity" refTypeAc="MI:0356"/>
            <secondaryRef db="pubmed" dbAc="MI:0446" id="14755292" refType="primary-reference" refTypeAc="MI:0358"/>
          </xref>
        </interactionType>
        <attributeList>
          <attribute name="assembly">dimeric, multimeric</attribute>
          <attribute name="3d-r-factors" nameAc="MI:0631">working 76.900%, free 72.00%</attribute>
          <attribute name="3d-resolution" nameAc="MI:0632">2.85A</attribute>
        </attributeList>
      </interaction>
    </interactionList>
  </entry>
</entrySet>