1S70

Complex between protein ser/thr phosphatase-1 (delta) and the myosin phosphatase targeting subunit 1 (MYPT1)

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.293 
  • R-Value Work: 0.223 
  • R-Value Observed: 0.223 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history. 


Literature

Structural basis of protein phosphatase 1 regulation

Terrak, M., Kerff, F., Langsetmo, K., Tao, T., Dominguez, R.

(2004) Nature 429: 780-784

  • DOI: 10.1038/nature02582
  • Primary Citation of Related Structures:  
    1S70

  • PubMed Abstract: 

    • The coordinated and reciprocal action of serine/threonine (Ser/Thr) protein kinases and phosphatases produces transient phosphorylation, a fundamental regulatory mechanism for many biological processes. The human genome encodes a far greater number o ...

    The coordinated and reciprocal action of serine/threonine (Ser/Thr) protein kinases and phosphatases produces transient phosphorylation, a fundamental regulatory mechanism for many biological processes. The human genome encodes a far greater number of Ser/Thr protein kinases than of phosphatases. Protein phosphatase 1 (PP1), in particular, is ubiquitously distributed and regulates a broad range of cellular functions, including glycogen metabolism, cell-cycle progression and muscle relaxation. PP1 has evolved effective catalytic machinery but lacks substrate specificity. Substrate specificity is conferred upon PP1 through interactions with a large number of regulatory subunits. The regulatory subunits are generally unrelated, but most possess the RVxF motif, a canonical PP1-binding sequence. Here we reveal the crystal structure at 2.7 A resolution of the complex between PP1 and a 34-kDa N-terminal domain of the myosin phosphatase targeting subunit MYPT1. MYPT1 is the protein that regulates PP1 function in smooth muscle relaxation. Structural elements amino- and carboxy-terminal to the RVxF motif of MYPT1 are positioned in a way that leads to a pronounced reshaping of the catalytic cleft of PP1, contributing to the increased myosin specificity of this complex. The structure has general implications for the control of PP1 activity by other regulatory subunits.

    Organizational Affiliation: 

    Boston Biomedical Research Institute, 64 Grove Street, Watertown, Massachusetts 02472, USA.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Serine/threonine protein phosphatase PP1-beta (or delta) catalytic subunitA330Homo sapiensMutation(s): 3 
Gene Names: PPP1CB
EC: 3.1.3.16 (PDB Primary Data), 3.1.3.53 (UniProt)
Find proteins for P62207 (Gallus gallus)
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Go to UniProtKB:  P62207
Protein Feature View
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  • Reference Sequence
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(by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
130 kDa myosin-binding subunit of smooth muscle myosin phophatase (M130)B299Gallus gallusMutation(s): 0 
Gene Names: PPP1R12A, MBS, MYPT1
EC: 3.1.3.53
Find proteins for Q90623 (Gallus gallus)
Explore Q90623 
Go to UniProtKB:  Q90623
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PGE
Query on PGE
Download CCD File 
A
TRIETHYLENE GLYCOL
C6 H14 O4
ZIBGPFATKBEMQZ-UHFFFAOYSA-N		 Ligand Interaction
MN
Query on MN
Download CCD File 
A
MANGANESE (II) ION
Mn
WAEMQWOKJMHJLA-UHFFFAOYSA-N		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.293 
  • R-Value Work: 0.223 
  • R-Value Observed: 0.223 
  • Space Group: P 43 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 75.188α = 90
b = 75.188β = 90
c = 241.753γ = 90
Software Package:
Software NamePurpose
CNSrefinement
DENZOdata reduction
SCALEPACKdata scaling
AMoREphasing

Structure Validation

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View more in-depth experimental data

Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2004-06-22
    Type: Initial release
  • Version 1.1: 2008-04-29
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance