2i3t

From Proteopedia

(Difference between revisions)

Revision as of 08:11, 4 July 2018

Bub3 complex with Mad3 (BubR1) GLEBS motif

Structural highlights

2i3t is a 8 chain structure with sequence from Atcc 18824. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Related:	1u4c, 2i3s
Gene:	BUB3, YOR026W, OR26.16 (ATCC 18824), MAD3, YJL013C, J1341 (ATCC 18824)
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[BUB3_YEAST] Required for cell cycle arrest in response to loss of microtubule function. Component of the spindle assembly checkpoint which is a feedback control that prevents cells with incompletely assembled spindles from leaving mitosis. Component of the mitotic checkpoint complex (MCC) which inhibits the ubiquitin ligase activity of the anaphase promoting complex/cyclosome (APC/C) by preventing its activation by CDC20. The formation of a MAD1-BUB1-BUB3 complex seems to be required for the spindle checkpoint mechanism.^[1] [MAD3_YEAST] Component of the spindle assembly checkpoint which is a feedback control that prevents cells with incompletely assembled spindles from leaving mitosis. Component of the mitotic checkpoint complex (MCC) which inhibits the ubiquitin ligase activity of the anaphase promoting complex/cyclosome (APC/C) by preventing its activation by CDC20.^[2]

Evolutionary Conservation

Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.

Publication Abstract from PubMed

The Mad3/BubR1, Mad2, Bub1, and Bub3 proteins are gatekeepers for the transition from metaphase to anaphase. Mad3 from Saccharomyces cerevisiae has homology to Bub1 but lacks a corresponding C-terminal kinase domain. Mad3 forms a stable heterodimer with Bub3. Negative-stain electron microscopy shows that Mad3 is an extended molecule (approximately 200 A long), whereas Bub3 is globular. The Gle2-binding-sequence (GLEBS) motifs found in Mad3 and Bub1 are necessary and sufficient for interaction with Bub3. The calorimetrically determined dissociation constants for GLEBS-motif peptides and Bub3 are approximately 5 microM. Crystal structures of these peptides with Bub3 show that the interactions for Mad3 and Bub1 are similar and mutually exclusive. In both structures, the GLEBS peptide snakes along the top surface of the beta-propeller, forming an extensive interface. Mutations in either protein that disrupt the interface cause checkpoint deficiency and chromosome instability. We propose that the structure imposed on the GLEBS segment by its association with Bub3 enables recruitment to unattached kinetochores.

Structural analysis of Bub3 interactions in the mitotic spindle checkpoint.,Larsen NA, Al-Bassam J, Wei RR, Harrison SC Proc Natl Acad Sci U S A. 2007 Jan 23;104(4):1201-6. Epub 2007 Jan 16. PMID:17227844^[3]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Poddar A, Stukenberg PT, Burke DJ. Two complexes of spindle checkpoint proteins containing Cdc20 and Mad2 assemble during mitosis independently of the kinetochore in Saccharomyces cerevisiae. Eukaryot Cell. 2005 May;4(5):867-78. PMID:15879521 doi:10.1128/EC.4.5.867-878.2005
↑ Hardwick KG, Johnston RC, Smith DL, Murray AW. MAD3 encodes a novel component of the spindle checkpoint which interacts with Bub3p, Cdc20p, and Mad2p. J Cell Biol. 2000 Mar 6;148(5):871-82. PMID:10704439
↑ Larsen NA, Al-Bassam J, Wei RR, Harrison SC. Structural analysis of Bub3 interactions in the mitotic spindle checkpoint. Proc Natl Acad Sci U S A. 2007 Jan 23;104(4):1201-6. Epub 2007 Jan 16. PMID:17227844

1 Structural highlights
2 Function
3 Evolutionary Conservation
4 Publication Abstract from PubMed
5 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/2i3t"

@@ Line 1: / Line 1: @@
 ==Bub3 complex with Mad3 (BubR1) GLEBS motif==
 <StructureSection load='2i3t' size='340' side='right' caption='[[2i3t]], [[Resolution|resolution]] 2.80&Aring;' scene=''>
@@ Line 5: / Line 6: @@
 </td></tr><tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1u4c|1u4c]], [[2i3s|2i3s]]</td></tr>
 <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">BUB3, YOR026W, OR26.16 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=4932 ATCC 18824]), MAD3, YJL013C, J1341 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=4932 ATCC 18824])</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=2i3t FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2i3t OCA], [http://pdbe.org/2i3t PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=2i3t RCSB], [http://www.ebi.ac.uk/pdbsum/2i3t PDBsum]</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=2i3t FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2i3t OCA], [http://pdbe.org/2i3t PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=2i3t RCSB], [http://www.ebi.ac.uk/pdbsum/2i3t PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=2i3t ProSAT]</span></td></tr>
 </table>
 == Function ==
@@ Line 13: / Line 14: @@
 Check<jmol>
   <jmolCheckbox>
-    <scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/i3/2i3t_consurf.spt"</scriptWhenChecked>
+    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/i3/2i3t_consurf.spt"</scriptWhenChecked>
     <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
     <text>to colour the structure by Evolutionary Conservation</text>
   </jmolCheckbox>
-</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/chain_selection.php?pdb_ID=2ata ConSurf].
+</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/main_output.php?pdb_ID=2i3t ConSurf].
 <div style="clear:both"></div>
 <div style="background-color:#fffaf0;">

2i3t

From Proteopedia

Revision as of 08:11, 4 July 2018

Bub3 complex with Mad3 (BubR1) GLEBS motif

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

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