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| | <StructureSection load='6ded' size='340' side='right'caption='[[6ded]], [[Resolution|resolution]] 2.20Å' scene=''> | | <StructureSection load='6ded' size='340' side='right'caption='[[6ded]], [[Resolution|resolution]] 2.20Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[6ded]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Human Human]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6DED OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=6DED FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[6ded]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6DED OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6DED FirstGlance]. <br> |
| - | </td></tr><tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">NCKIPSD, AF3P21, SPIN90 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 HUMAN])</td></tr> | + | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.204Å</td></tr> |
| - | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=6ded FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6ded OCA], [http://pdbe.org/6ded PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=6ded RCSB], [http://www.ebi.ac.uk/pdbsum/6ded PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=6ded ProSAT]</span></td></tr> | + | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=6ded FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6ded OCA], [https://pdbe.org/6ded PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6ded RCSB], [https://www.ebi.ac.uk/pdbsum/6ded PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6ded ProSAT]</span></td></tr> |
| | </table> | | </table> |
| | == Disease == | | == Disease == |
| - | [[http://www.uniprot.org/uniprot/SPN90_HUMAN SPN90_HUMAN]] A chromosomal aberration involving NCKIPSD/AF3p21 is found in therapy-related leukemia. Translocation t(3;11)(p21;q23) with KMT2A/MLL1.<ref>PMID:10648423</ref> | + | [https://www.uniprot.org/uniprot/SPN90_HUMAN SPN90_HUMAN] A chromosomal aberration involving NCKIPSD/AF3p21 is found in therapy-related leukemia. Translocation t(3;11)(p21;q23) with KMT2A/MLL1.<ref>PMID:10648423</ref> |
| | == Function == | | == Function == |
| - | [[http://www.uniprot.org/uniprot/SPN90_HUMAN SPN90_HUMAN]] Has an important role in stress fiber formation induced by active diaphanous protein homolog 1 (DRF1). Induces microspike formation, in vivo (By similarity). In vitro, stimulates N-WASP-induced ARP2/3 complex activation in the absence of CDC42 (By similarity). May play an important role in the maintenance of sarcomeres and/or in the assembly of myofibrils into sarcomeres. Implicated in regulation of actin polymerization and cell adhesion. Plays a role in angiogenesis.<ref>PMID:22419821</ref> | + | [https://www.uniprot.org/uniprot/SPN90_HUMAN SPN90_HUMAN] Has an important role in stress fiber formation induced by active diaphanous protein homolog 1 (DRF1). Induces microspike formation, in vivo (By similarity). In vitro, stimulates N-WASP-induced ARP2/3 complex activation in the absence of CDC42 (By similarity). May play an important role in the maintenance of sarcomeres and/or in the assembly of myofibrils into sarcomeres. Implicated in regulation of actin polymerization and cell adhesion. Plays a role in angiogenesis.<ref>PMID:22419821</ref> |
| - | <div style="background-color:#fffaf0;">
| + | |
| - | == Publication Abstract from PubMed ==
| + | |
| - | Unlike the WASP family of Arp2/3 complex activators, WISH/DIP/SPIN90 (WDS) family proteins activate actin filament nucleation by the Arp2/3 complex without the need for a preformed actin filament. This allows WDS proteins to initiate branched actin network assembly by providing seed filaments that activate WASP-bound Arp2/3 complex. Despite their important role in actin network initiation, it is unclear how WDS proteins drive the activating steps that require both WASP and pre-existing actin filaments during WASP-mediated nucleation. Here, we show that SPIN90 folds into an armadillo repeat domain that binds a surface of Arp2/3 complex distinct from the two WASP sites, straddling a hinge point that may stimulate movement of the Arp2 subunit into the activated short-pitch conformation. SPIN90 binds a surface on Arp2/3 complex that overlaps with actin filament binding, explaining how it could stimulate the same structural rearrangements in the complex as pre-existing actin filaments. By revealing how WDS proteins activate the Arp2/3 complex, these data provide a molecular foundation to understand initiation of dendritic actin networks and regulation of Arp2/3 complex by its activators.
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| - | Structure of the nucleation-promoting factor SPIN90 bound to the actin filament nucleator Arp2/3 complex.,Luan Q, Liu SL, Helgeson LA, Nolen BJ EMBO J. 2018 Oct 15. pii: embj.2018100005. doi: 10.15252/embj.2018100005. PMID:30322896<ref>PMID:30322896</ref>
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| - | | + | |
| - | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br>
| + | |
| - | </div>
| + | |
| - | <div class="pdbe-citations 6ded" style="background-color:#fffaf0;"></div>
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| | == References == | | == References == |
| | <references/> | | <references/> |
| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: Human]] | + | [[Category: Homo sapiens]] |
| | [[Category: Large Structures]] | | [[Category: Large Structures]] |
| - | [[Category: Luan, Q]] | + | [[Category: Luan Q]] |
| - | [[Category: Nolen, B J]] | + | [[Category: Nolen BJ]] |
| - | [[Category: And 2-3 armadillo repeat]]
| + | |
| - | [[Category: Endocytosis]]
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| - | [[Category: Inactive form]]
| + | |
| - | [[Category: N-terminally truncated spin90]]
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| - | [[Category: Unable to activate arp2-3 complex]]
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