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==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='4i5n' size='340' side='right' caption='[[4i5n]], [[Resolution|resolution]] 2.80&Aring;' scene=''>
<StructureSection load='4i5n' size='340' side='right'caption='[[4i5n]], [[Resolution|resolution]] 2.80&Aring;' scene=''>
== Structural highlights ==
== Structural highlights ==
<table><tr><td colspan='2'>[[4i5n]] is a 8 chain structure with sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens], [http://en.wikipedia.org/wiki/Microcystis_aeruginosa Microcystis aeruginosa] and [http://en.wikipedia.org/wiki/Streptomyces_aureorectus Streptomyces aureorectus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4I5N OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4I5N FirstGlance]. <br>
<table><tr><td colspan='2'>[[4i5n]] 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=4I5N OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4I5N FirstGlance]. <br>
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=MN:MANGANESE+(II)+ION'>MN</scene></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]] 2.8&#8491;</td></tr>
<tr id='NonStdRes'><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><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=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=MSE:SELENOMETHIONINE'>MSE</scene></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=MN:MANGANESE+(II)+ION'>MN</scene>, <scene name='pdbligand=MSE:SELENOMETHIONINE'>MSE</scene></td></tr>
<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[3p71|3p71]], [[2npp|2npp]], [[2ie3|2ie3]], [[4i5l|4i5l]], [[4i5j|4i5j]], [[4i5k|4i5k]]</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=4i5n FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4i5n OCA], [https://pdbe.org/4i5n PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4i5n RCSB], [https://www.ebi.ac.uk/pdbsum/4i5n PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4i5n ProSAT]</span></td></tr>
<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">PPP2R1A ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=285571 Streptomyces aureorectus]), PPP2R3B, PPP2R3L ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 Homo sapiens]), PPP2CA ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 Homo sapiens])</td></tr>
<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>
<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=4i5n FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4i5n OCA], [http://www.rcsb.org/pdb/explore.do?structureId=4i5n RCSB], [http://www.ebi.ac.uk/pdbsum/4i5n PDBsum]</span></td></tr>
</table>
</table>
== Disease ==
[https://www.uniprot.org/uniprot/CDC6_HUMAN CDC6_HUMAN] Defects in CDC6 are the cause of Meier-Gorlin syndrome type 5 (MGORS5) [MIM:[https://omim.org/entry/613805 613805]. MGORS5 is a syndrome characterized by bilateral microtia, aplasia/hypoplasia of the patellae, and severe intrauterine and postnatal growth retardation with short stature and poor weight gain. Additional clinical findings include anomalies of cranial sutures, microcephaly, apparently low-set and simple ears, microstomia, full lips, highly arched or cleft palate, micrognathia, genitourinary tract anomalies, and various skeletal anomalies. While almost all cases have primordial dwarfism with substantial prenatal and postnatal growth retardation, not all cases have microcephaly, and microtia and absent/hypoplastic patella are absent in some. Despite the presence of microcephaly, intellect is usually normal.<ref>PMID:21358632</ref>
== Function ==
== Function ==
[[http://www.uniprot.org/uniprot/2AAA_HUMAN 2AAA_HUMAN]] The PR65 subunit of protein phosphatase 2A serves as a scaffolding molecule to coordinate the assembly of the catalytic subunit and a variable regulatory B subunit. Required for proper chromosome segregation and for centromeric localization of SGOL1 in mitosis.<ref>PMID:16580887</ref>  [[http://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>  [[http://www.uniprot.org/uniprot/P2R3B_HUMAN P2R3B_HUMAN]] The B regulatory subunit might modulate substrate selectivity and catalytic activity, and also might direct the localization of the catalytic enzyme to a particular subcellular compartment.  
[https://www.uniprot.org/uniprot/P2R3B_HUMAN P2R3B_HUMAN] The B regulatory subunit might modulate substrate selectivity and catalytic activity, and also might direct the localization of the catalytic enzyme to a particular subcellular compartment.[https://www.uniprot.org/uniprot/CDC6_HUMAN CDC6_HUMAN] Involved in the initiation of DNA replication. Also participates in checkpoint controls that ensure DNA replication is completed before mitosis is initiated.
<div style="background-color:#fffaf0;">
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
== Publication Abstract from PubMed ==
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From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
</div>
<div class="pdbe-citations 4i5n" style="background-color:#fffaf0;"></div>


==See Also==
==See Also==
*[[Serine/threonine protein phosphatase|Serine/threonine protein phosphatase]]
*[[Protein phosphatase 3D structures|Protein phosphatase 3D structures]]
== References ==
== References ==
<references/>
<references/>
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</StructureSection>
</StructureSection>
[[Category: Homo sapiens]]
[[Category: Homo sapiens]]
[[Category: Large Structures]]
[[Category: Microcystis aeruginosa]]
[[Category: Microcystis aeruginosa]]
[[Category: Phosphoprotein phosphatase]]
[[Category: Guo F]]
[[Category: Streptomyces aureorectus]]
[[Category: Satyshur KA]]
[[Category: Guo, F]]
[[Category: Wlodarchak N]]
[[Category: Satyshur, K A]]
[[Category: Xing Y]]
[[Category: Wlodarchak, N]]
[[Category: Xing, Y]]
[[Category: Ef hand]]
[[Category: Hydrolase-toxin complex]]
[[Category: Phosphatase]]
[[Category: Transferase-toxin complex]]
Retrieved from "https://proteopedia.org/4i5n"