4i5l
From Proteopedia
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| - | {{STRUCTURE_4i5l| PDB=4i5l | SCENE= }} | ||
| - | ===Structural mechanism of trimeric PP2A holoenzyme involving PR70: insight for Cdc6 dephosphorylation=== | ||
| - | == | + | ==Structural mechanism of trimeric PP2A holoenzyme involving PR70: insight for Cdc6 dephosphorylation== |
| - | [[ | + | <StructureSection load='4i5l' size='340' side='right'caption='[[4i5l]], [[Resolution|resolution]] 2.43Å' scene=''> |
| + | == Structural highlights == | ||
| + | <table><tr><td colspan='2'>[[4i5l]] is a 8 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens] and [https://en.wikipedia.org/wiki/Microcystis_aeruginosa Microcystis aeruginosa]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4I5L OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4I5L 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]] 2.43Å</td></tr> | ||
| + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=1ZN:(2S,3S,4E,6E,8S,9S)-3-AMINO-9-METHOXY-2,6,8-TRIMETHYL-10-PHENYLDECA-4,6-DIENOIC+ACID'>1ZN</scene>, <scene name='pdbligand=ACB:3-METHYL-BETA-D-ASPARTIC+ACID'>ACB</scene>, <scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=DAL:D-ALANINE'>DAL</scene>, <scene name='pdbligand=FGA:GAMMA-D-GLUTAMIC+ACID'>FGA</scene>, <scene name='pdbligand=MAA:N-METHYL-L-ALANINE'>MAA</scene>, <scene name='pdbligand=MLI:MALONATE+ION'>MLI</scene>, <scene name='pdbligand=MN:MANGANESE+(II)+ION'>MN</scene>, <scene name='pdbligand=PEG:DI(HYDROXYETHYL)ETHER'>PEG</scene></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=4i5l FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4i5l OCA], [https://pdbe.org/4i5l PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4i5l RCSB], [https://www.ebi.ac.uk/pdbsum/4i5l PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4i5l ProSAT]</span></td></tr> | ||
| + | </table> | ||
| + | == Function == | ||
| + | [https://www.uniprot.org/uniprot/PP2AA_HUMAN PP2AA_HUMAN] PP2A is the major phosphatase for microtubule-associated proteins (MAPs). PP2A can modulate the activity of phosphorylase B kinase casein kinase 2, mitogen-stimulated S6 kinase, and MAP-2 kinase. Cooperates with SGOL2 to protect centromeric cohesin from separase-mediated cleavage in oocytes specifically during meiosis I (By similarity). Can dephosphorylate SV40 large T antigen and p53/TP53. Activates RAF1 by dephosphorylating it at 'Ser-259'.<ref>PMID:9920888</ref> <ref>PMID:10801873</ref> <ref>PMID:22613722</ref> | ||
| + | <div style="background-color:#fffaf0;"> | ||
| + | == Publication Abstract from PubMed == | ||
| + | The B''/PR72 family of protein phosphatase 2A (PP2A) is an important PP2A family involved in diverse cellular processes, and uniquely regulated by calcium binding to the regulatory subunit. The PR70 subunit in this family interacts with cell division control 6 (Cdc6), a cell cycle regulator important for control of DNA replication. Here, we report crystal structures of the isolated PR72 and the trimeric PR70 holoenzyme at a resolution of 2.1 and 2.4 A, respectively, and in vitro characterization of Cdc6 dephosphorylation. The holoenzyme structure reveals that one of the PR70 calcium-binding motifs directly contacts the scaffold subunit, resulting in the most compact scaffold subunit conformation among all PP2A holoenzymes. PR70 also binds distinctively to the catalytic subunit near the active site, which is required for PR70 to enhance phosphatase activity toward Cdc6. Our studies provide a structural basis for unique regulation of B''/PR72 holoenzymes by calcium ions, and suggest the mechanisms for precise control of substrate specificity among PP2A holoenzymes. | ||
| - | + | Structure of the Ca(2+)-dependent PP2A heterotrimer and insights into Cdc6 dephosphorylation.,Wlodarchak N, Guo F, Satyshur KA, Jiang L, Jeffrey PD, Sun T, Stanevich V, Mumby MC, Xing Y Cell Res. 2013 Jul;23(7):931-46. doi: 10.1038/cr.2013.77. Epub 2013 Jun 11. PMID:23752926<ref>PMID:23752926</ref> | |
| - | + | ||
| - | == | + | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> |
| - | <references | + | </div> |
| + | <div class="pdbe-citations 4i5l" style="background-color:#fffaf0;"></div> | ||
| + | |||
| + | ==See Also== | ||
| + | *[[Protein phosphatase 3D structures|Protein phosphatase 3D structures]] | ||
| + | == References == | ||
| + | <references/> | ||
| + | __TOC__ | ||
| + | </StructureSection> | ||
[[Category: Homo sapiens]] | [[Category: Homo sapiens]] | ||
| + | [[Category: Large Structures]] | ||
[[Category: Microcystis aeruginosa]] | [[Category: Microcystis aeruginosa]] | ||
| - | + | [[Category: Guo F]] | |
| - | [[Category: Guo | + | [[Category: Satyshur KA]] |
| - | [[Category: Satyshur | + | [[Category: Wlodarchak N]] |
| - | [[Category: Wlodarchak | + | [[Category: Xing Y]] |
| - | [[Category: Xing | + | |
| - | + | ||
| - | + | ||
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Current revision
Structural mechanism of trimeric PP2A holoenzyme involving PR70: insight for Cdc6 dephosphorylation
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