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| | <StructureSection load='6j8n' size='340' side='right'caption='[[6j8n]], [[Resolution|resolution]] 1.95Å' scene=''> | | <StructureSection load='6j8n' size='340' side='right'caption='[[6j8n]], [[Resolution|resolution]] 1.95Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[6j8n]] is a 4 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=6J8N OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=6J8N FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[6j8n]] is a 4 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=6J8N OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6J8N FirstGlance]. <br> |
| - | </td></tr><tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">SVBP, CCDC23 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 HUMAN]), VASH1, KIAA1036, VASH ([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]] 1.95Å</td></tr> |
| - | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Tubulinyl-Tyr_carboxypeptidase Tubulinyl-Tyr carboxypeptidase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.4.17.17 3.4.17.17] </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=6j8n FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6j8n OCA], [https://pdbe.org/6j8n PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6j8n RCSB], [https://www.ebi.ac.uk/pdbsum/6j8n PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6j8n ProSAT]</span></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=6j8n FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6j8n OCA], [http://pdbe.org/6j8n PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=6j8n RCSB], [http://www.ebi.ac.uk/pdbsum/6j8n PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=6j8n ProSAT]</span></td></tr> | + | |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[http://www.uniprot.org/uniprot/SVBP_HUMAN SVBP_HUMAN]] Enhances the tyrosine carboxypeptidase activity of VASH1 and VASH2, thereby promoting the removal of the C-terminal tyrosine residue of alpha-tubulin (PubMed:29146869). Also required to enhance the solubility and secretion of VASH1 and VASH2 (PubMed:20736312, PubMed:27879017).<ref>PMID:20736312</ref> <ref>PMID:27879017</ref> <ref>PMID:29146869</ref> [[http://www.uniprot.org/uniprot/VASH1_HUMAN VASH1_HUMAN]] Tyrosine carboxypeptidase that removes the C-terminal tyrosine residue of alpha-tubulin, thereby regulating microtubule dynamics and function (PubMed:29146869). Acts as an angiogenesis inhibitor: inhibits migration, proliferation and network formation by endothelial cells as well as angiogenesis (PubMed:15467828, PubMed:16488400, PubMed:16707096, PubMed:19204325). This inhibitory effect is selective to endothelial cells as it does not affect the migration of smooth muscle cells or fibroblasts (PubMed:15467828, PubMed:16488400, PubMed:16707096).<ref>PMID:15467828</ref> <ref>PMID:16488400</ref> <ref>PMID:16707096</ref> <ref>PMID:19204325</ref> <ref>PMID:29146869</ref> | + | [https://www.uniprot.org/uniprot/SVBP_HUMAN SVBP_HUMAN] Enhances the tyrosine carboxypeptidase activity of VASH1 and VASH2, thereby promoting the removal of the C-terminal tyrosine residue of alpha-tubulin (PubMed:29146869). Also required to enhance the solubility and secretion of VASH1 and VASH2 (PubMed:20736312, PubMed:27879017).<ref>PMID:20736312</ref> <ref>PMID:27879017</ref> <ref>PMID:29146869</ref> |
| - | <div style="background-color:#fffaf0;">
| + | |
| - | == Publication Abstract from PubMed ==
| + | |
| - | alpha-Tubulin detyrosination, largely catalyzed by vasohibins, is involved in many microtubule (MT)-related cellular events. In this study, we identified a core heterodimeric complex of human small vasohibin-binding protein (SVBP) and vasohibin 1 (VASH1) (hereafter denoted as SVBP-VASH1) that catalyzes the detyrosination of a peptide derived from C-terminus of alpha-tubulin. We further solved the crystal structures of the SVBP-VASH1 heterodimer alone and in complex with either an inhibitor or a mutant substrate peptide. Our structural research, complemented by biochemical and mutagenesis experiments, resulted in identification of the key residues for VASH1 binding to SVBP and alpha-tubulin substrate. Our in vivo experiments reveal that MT detyrosination in general, as well as the interactions between SVBP, VASH1, and alpha-tubulin, are critical for spindle function and accurate chromosome segregation during mitosis. Furthermore, we found that the phenotypes caused by the depletion of vasohibins were largely rescued upon co-depletion of kinesin13/MCAK, suggesting the coordination between the MT depolymerase and MT detyrosination during mitosis. Thus our work not only provides structural insights into the molecular mechanism of alpha-tubulin detyrosination catalyzed by SVBP-bound vasohibins, but also uncovers the key role of vasohibins-mediated MT detyrosination in spindle morphology and chromosome segregation during mitosis.
| + | |
| | | | |
| - | Molecular basis of vasohibins-mediated detyrosination and its impact on spindle function and mitosis.,Liao S, Rajendraprasad G, Wang N, Eibes S, Gao J, Yu H, Wu G, Tu X, Huang H, Barisic M, Xu C Cell Res. 2019 Jun 6. pii: 10.1038/s41422-019-0187-y. doi:, 10.1038/s41422-019-0187-y. PMID:31171830<ref>PMID:31171830</ref>
| + | ==See Also== |
| - | | + | *[[Carboxypeptidase 3D structures|Carboxypeptidase 3D structures]] |
| - | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br>
| + | |
| - | </div>
| + | |
| - | <div class="pdbe-citations 6j8n" style="background-color:#fffaf0;"></div>
| + | |
| | == References == | | == References == |
| | <references/> | | <references/> |
| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: Human]] | + | [[Category: Homo sapiens]] |
| | [[Category: Large Structures]] | | [[Category: Large Structures]] |
| - | [[Category: Tubulinyl-Tyr carboxypeptidase]]
| + | [[Category: Gao J]] |
| - | [[Category: Gao, J]] | + | [[Category: Liao S]] |
| - | [[Category: Liao, S]] | + | [[Category: Xu C]] |
| - | [[Category: Structural genomic]]
| + | |
| - | [[Category: Xu, C]] | + | |
| - | [[Category: Complex]]
| + | |
| - | [[Category: Peptide binding protein]]
| + | |
| - | [[Category: Peptide binding protein-hydrolase complex]]
| + | |
| - | [[Category: Protease]]
| + | |
| - | [[Category: Sgc]]
| + | |
