5a1k
From Proteopedia
(Difference between revisions)
(New page: '''Unreleased structure''' The entry 5a1k is ON HOLD until sometime in the future Authors: Chumnarnsilpa, S., Robinson, R.C., Grimes, J.M., Leyrat, C. Description: Crystal structure of...) |
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| - | '''Unreleased structure''' | ||
| - | + | ==Crystal structure of calcium-free human adseverin domains A1-A3== | |
| + | <StructureSection load='5a1k' size='340' side='right'caption='[[5a1k]], [[Resolution|resolution]] 2.90Å' scene=''> | ||
| + | == Structural highlights == | ||
| + | <table><tr><td colspan='2'>[[5a1k]] 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=5A1K OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=5A1K FirstGlance]. <br> | ||
| + | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.9Å</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=5a1k FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5a1k OCA], [https://pdbe.org/5a1k PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=5a1k RCSB], [https://www.ebi.ac.uk/pdbsum/5a1k PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=5a1k ProSAT]</span></td></tr> | ||
| + | </table> | ||
| + | == Function == | ||
| + | [https://www.uniprot.org/uniprot/SCIN_HUMAN SCIN_HUMAN] Ca(2+)-dependent actin filament-severing protein that has a regulatory function in exocytosis by affecting the organization of the microfilament network underneath the plasma membrane (PubMed:8547642, PubMed:26365202). Severing activity is inhibited by phosphatidylinositol 4,5-bis-phosphate (PIP2) (By similarity). In vitro, also has barbed end capping and nucleating activities in the presence of Ca(2+). Required for megakaryocyte differentiation, maturation, polyploidization and apoptosis with the release of platelet-like particles (PubMed:11568009). Plays a role in osteoclastogenesis (OCG) and actin cytoskeletal organization in osteoclasts (By similarity). Regulates chondrocyte proliferation and differentiation (By similarity). Inhibits cell proliferation and tumorigenesis. Signaling is mediated by MAPK, p38 and JNK pathways (PubMed:11568009).[UniProtKB:Q28046][UniProtKB:Q5ZIV9][UniProtKB:Q60604]<ref>PMID:11568009</ref> <ref>PMID:26365202</ref> <ref>PMID:8547642</ref> | ||
| + | <div style="background-color:#fffaf0;"> | ||
| + | == Publication Abstract from PubMed == | ||
| + | Adseverin is a member of the calcium-regulated gelsolin superfamily of actin-binding proteins. Here we report the crystal structure of the calcium-free N-terminal half of adseverin (iA1-A3) and the Ca(2+)-bound structure of A3, which reveal structural similarities and differences with gelsolin. Solution small-angle X-ray scattering combined with ensemble optimization revealed a dynamic Ca(2+)-dependent equilibrium between inactive, intermediate and active conformations. Increasing calcium concentrations progressively shift this equilibrium from a main population of inactive conformation to the active form. Molecular dynamics simulations of iA1-A3 provided insights into Ca(2+)-induced destabilization, implicating a critical role for the A2 type II calcium-binding site and the A2A3 linker in the activation process. Finally, mutations that disrupt the A1/A3 interface increase Ca(2+)-independent F-actin severing by A1-A3, albeit at a lower efficiency than observed for gelsolin domains G1-G3. Together, these data address the calcium dependency of A1-A3 activity in relation to the calcium-independent activity of G1-G3. | ||
| - | + | Calcium-controlled conformational choreography in the N-terminal half of adseverin.,Chumnarnsilpa S, Robinson RC, Grimes JM, Leyrat C Nat Commun. 2015 Sep 14;6:8254. doi: 10.1038/ncomms9254. PMID:26365202<ref>PMID:26365202</ref> | |
| - | + | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |
| - | [[Category: | + | </div> |
| - | [[Category: Chumnarnsilpa | + | <div class="pdbe-citations 5a1k" style="background-color:#fffaf0;"></div> |
| - | [[Category: | + | == References == |
| - | [[Category: | + | <references/> |
| - | [[Category: Robinson | + | __TOC__ |
| + | </StructureSection> | ||
| + | [[Category: Homo sapiens]] | ||
| + | [[Category: Large Structures]] | ||
| + | [[Category: Chumnarnsilpa S]] | ||
| + | [[Category: Grimes JM]] | ||
| + | [[Category: Leyrat C]] | ||
| + | [[Category: Robinson RC]] | ||
Current revision
Crystal structure of calcium-free human adseverin domains A1-A3
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