View source for 1klq


==The Mad2 Spindle Checkpoint Protein Undergoes Similar Major Conformational Changes upon Binding to Either Mad1 or Cdc20==
<StructureSection load='1klq' size='340' side='right'caption='[[1klq]]' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[1klq]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1KLQ OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1KLQ FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Solution NMR</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=1klq FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1klq OCA], [https://pdbe.org/1klq PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1klq RCSB], [https://www.ebi.ac.uk/pdbsum/1klq PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1klq ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/MD2L1_HUMAN MD2L1_HUMAN] Component of the spindle-assembly checkpoint that prevents the onset of anaphase until all chromosomes are properly aligned at the metaphase plate. Required for the execution of the mitotic checkpoint which monitors the process of kinetochore-spindle attachment and inhibits the activity of the anaphase promoting complex by sequestering CDC20 until all chromosomes are aligned at the metaphase plate.<ref>PMID:10700282</ref> <ref>PMID:11804586</ref> <ref>PMID:15024386</ref> 
== Evolutionary Conservation ==
[[Image:Consurf_key_small.gif|200px|right]]
Check<jmol>
  <jmolCheckbox>
    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/kl/1klq_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/main_output.php?pdb_ID=1klq ConSurf].
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== Publication Abstract from PubMed ==
Mad2 participates in spindle checkpoint inhibition of APC(Cdc20). We show that RNAi-mediated suppression of Mad1 function in mammalian cells causes loss of Mad2 kinetochore localization and impairment of the spindle checkpoint. Mad1 and Cdc20 contain Mad2 binding motifs that share a common consensus. We have identified a class of Mad2 binding peptides with a similar consensus. Binding of one of these ligands, MBP1, triggers an extensive rearrangement of the tertiary structure of Mad2. Mad2 also undergoes a similar striking structural change upon binding to a Mad1 or Cdc20 binding motif peptide. Our data suggest that, upon checkpoint activation, Mad1 recruits Mad2 to unattached kinetochores and may promote binding of Mad2 to Cdc20.

The Mad2 spindle checkpoint protein undergoes similar major conformational changes upon binding to either Mad1 or Cdc20.,Luo X, Tang Z, Rizo J, Yu H Mol Cell. 2002 Jan;9(1):59-71. PMID:11804586<ref>PMID:11804586</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Homo sapiens]]
[[Category: Large Structures]]
[[Category: Luo X]]
[[Category: Rizo J]]
[[Category: Tang Z]]
[[Category: Yu H]]