6czo

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'''Unreleased structure'''
 
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The entry 6czo is ON HOLD until Paper Publication
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==The KNL1-PP1 Holoenzyme==
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<StructureSection load='6czo' size='340' side='right'caption='[[6czo]], [[Resolution|resolution]] 2.95&Aring;' scene=''>
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== Structural highlights ==
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<table><tr><td colspan='2'>[[6czo]] 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=6CZO OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=6CZO FirstGlance]. <br>
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</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=MN:MANGANESE+(II)+ION'>MN</scene>, <scene name='pdbligand=PO4:PHOSPHATE+ION'>PO4</scene></td></tr>
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<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">PPP1CA, PPP1A ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 HUMAN]), CASC5 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 HUMAN])</td></tr>
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<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Phosphoprotein_phosphatase Phosphoprotein phosphatase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.1.3.16 3.1.3.16] </span></td></tr>
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<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=6czo FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6czo OCA], [http://pdbe.org/6czo PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=6czo RCSB], [http://www.ebi.ac.uk/pdbsum/6czo PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=6czo ProSAT]</span></td></tr>
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</table>
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== Function ==
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[[http://www.uniprot.org/uniprot/PP1A_HUMAN PP1A_HUMAN]] Protein phosphatase that associates with over 200 regulatory proteins to form highly specific holoenzymes which dephosphorylate hundreds of biological targets. Protein phosphatase 1 (PP1) is essential for cell division, and participates in the regulation of glycogen metabolism, muscle contractility and protein synthesis. Involved in regulation of ionic conductances and long-term synaptic plasticity. May play an important role in dephosphorylating substrates such as the postsynaptic density-associated Ca(2+)/calmodulin dependent protein kinase II. Component of the PTW/PP1 phosphatase complex, which plays a role in the control of chromatin structure and cell cycle progression during the transition from mitosis into interphase. Regulates NEK2 function in terms of kinase activity and centrosome number and splitting, both in the presence and absence of radiation-induced DNA damage. Regulator of neural tube and optic fissure closure, and enteric neural crest cell (ENCCs) migration during development.<ref>PMID:17283141</ref>
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<div style="background-color:#fffaf0;">
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== Publication Abstract from PubMed ==
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The kinetochore scaffold 1 (KNL1) protein coordinates the spindle assembly checkpoint (SAC), a signaling pathway that delays chromosome segregation until all sister chromatids are properly attached to spindle microtubules. Recently, microtubules and protein phosphatase 1 (PP1), which both bind the N-terminal domain of KNL1, have emerged as regulators of the SAC; however, how these proteins interact to contribute to SAC signaling is unknown. Here, we use X-ray crystallography, nuclear magnetic resonance spectroscopy, and biochemical assays to show how KNL1 binds both PP1 and microtubules. Unexpectedly, we discovered that PP1 and microtubules bind KNL1 via overlapping binding sites. Further, we showed that Aurora B kinase phosphorylation results in distinct patterns of KNL1 complex disruption. Finally, combining this data with co-sedimentation assays unequivocally demonstrated that microtubules and PP1 binding to KNL1 is mutually exclusive, with preferential formation of the KNL1:PP1 holoenzyme in the presence of PP1.
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Authors: Bajaj, R., Peti, W., Page, R.
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KNL1 Binding to PP1 and Microtubules Is Mutually Exclusive.,Bajaj R, Bollen M, Peti W, Page R Structure. 2018 Oct 2;26(10):1327-1336.e4. doi: 10.1016/j.str.2018.06.013. Epub, 2018 Aug 9. PMID:30100357<ref>PMID:30100357</ref>
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Description: The KNL1-PP1 Holoenzyme
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From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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[[Category: Unreleased Structures]]
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</div>
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<div class="pdbe-citations 6czo" style="background-color:#fffaf0;"></div>
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== References ==
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<references/>
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__TOC__
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</StructureSection>
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[[Category: Human]]
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[[Category: Large Structures]]
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[[Category: Phosphoprotein phosphatase]]
[[Category: Bajaj, R]]
[[Category: Bajaj, R]]
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[[Category: Peti, W]]
 
[[Category: Page, R]]
[[Category: Page, R]]
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[[Category: Peti, W]]
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[[Category: Hydrolase]]
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[[Category: Kinetochore]]
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[[Category: Phosphatase]]
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[[Category: Regulator]]
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[[Category: Slim]]

Revision as of 10:54, 1 January 2020

The KNL1-PP1 Holoenzyme

PDB ID 6czo

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