3hvq

From Proteopedia

(Difference between revisions)

Revision as of 14:39, 24 December 2014

Crystal structure of a complex between Protein Phosphatase 1 alpha (PP1) and the PP1 binding and PDZ domains of Neurabin

Structural highlights

3hvq is a 4 chain structure with sequence from Homo sapiens and Rattus norvegicus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:	, ,
Related:	2fn5, 2gle, 1s70, 1fjm, 3egh, 3egg
Gene:	PPP1A, PPP1CA (Homo sapiens), Ppp1r9a (Rattus norvegicus)
Activity:	Phosphoprotein phosphatase, with EC number 3.1.3.16
Resources:	FirstGlance, OCA, RCSB, PDBsum

Function

[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.^[1] [NEB1_RAT] Binds to actin filaments (F-actin) and shows cross-linking activity. Binds along the sides of the F-actin. May be involved in neurite formation. Inhibits protein phosphatase 1-alpha activity. May play an important role in linking the actin cytoskeleton to the plasma membrane at the synaptic junction.

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 serine/threonine protein phosphatase 1 (PP1) dephosphorylates hundreds of key biological targets. PP1 associates with >or=200 regulatory proteins to form highly specific holoenzymes. These regulatory proteins target PP1 to its point of action within the cell and prime its enzymatic specificity for particular substrates. However, how they direct PP1's specificity is not understood. Here we show that spinophilin, a neuronal PP1 regulator, is entirely unstructured in its unbound form, and it binds PP1 through a folding-upon-binding mechanism in an elongated fashion, blocking one of PP1's three putative substrate binding sites without altering its active site. This mode of binding is sufficient for spinophilin to restrict PP1's activity toward a model substrate in vitro without affecting its ability to dephosphorylate its neuronal substrate, glutamate receptor 1 (GluR1). Thus, our work provides the molecular basis for the ability of spinophilin to dictate PP1 substrate specificity.

Spinophilin directs protein phosphatase 1 specificity by blocking substrate binding sites.,Ragusa MJ, Dancheck B, Critton DA, Nairn AC, Page R, Peti W Nat Struct Mol Biol. 2010 Apr;17(4):459-64. Epub 2010 Mar 21. PMID:20305656^[2]

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

References

↑ Mi J, Guo C, Brautigan DL, Larner JM. Protein phosphatase-1alpha regulates centrosome splitting through Nek2. Cancer Res. 2007 Feb 1;67(3):1082-9. PMID:17283141 doi:10.1158/0008-5472.CAN-06-3071
↑ Ragusa MJ, Dancheck B, Critton DA, Nairn AC, Page R, Peti W. Spinophilin directs protein phosphatase 1 specificity by blocking substrate binding sites. Nat Struct Mol Biol. 2010 Apr;17(4):459-64. Epub 2010 Mar 21. PMID:20305656 doi:10.1038/nsmb.1786

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

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/3hvq"

@@ Line 9: / Line 9: @@
 <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=3hvq FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3hvq OCA], [http://www.rcsb.org/pdb/explore.do?structureId=3hvq RCSB], [http://www.ebi.ac.uk/pdbsum/3hvq PDBsum]</span></td></tr>
 </table>
+== Function ==
+[[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>  [[http://www.uniprot.org/uniprot/NEB1_RAT NEB1_RAT]] Binds to actin filaments (F-actin) and shows cross-linking activity. Binds along the sides of the F-actin. May be involved in neurite formation. Inhibits protein phosphatase 1-alpha activity. May play an important role in linking the actin cytoskeleton to the plasma membrane at the synaptic junction.
 == Evolutionary Conservation ==
 [[Image:Consurf_key_small.gif|200px|right]]

3hvq

From Proteopedia

Revision as of 14:39, 24 December 2014

Crystal structure of a complex between Protein Phosphatase 1 alpha (PP1) and the PP1 binding and PDZ domains of Neurabin

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

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