3P71

Crystal structure of the complex of LCMT-1 and PP2A


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.249 
  • R-Value Work: 0.192 
  • R-Value Observed: 0.195 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

The Structural Basis for Tight Control of PP2A Methylation and Function by LCMT-1.

Stanevich, V.Jiang, L.Satyshur, K.A.Li, Y.Jeffrey, P.D.Li, Z.Menden, P.Semmelhack, M.F.Xing, Y.

(2011) Mol Cell 41: 331-342

  • DOI: 10.1016/j.molcel.2010.12.030
  • Primary Citation of Related Structures:  
    3P71

  • PubMed Abstract: 
  • Proper formation of protein phosphatase 2A (PP2A) holoenzymes is essential for the fitness of all eukaryotic cells. Carboxyl methylation of the PP2A catalytic subunit plays a critical role in regulating holoenzyme assembly; methylation is catalyzed b ...

    Proper formation of protein phosphatase 2A (PP2A) holoenzymes is essential for the fitness of all eukaryotic cells. Carboxyl methylation of the PP2A catalytic subunit plays a critical role in regulating holoenzyme assembly; methylation is catalyzed by PP2A-specific methyltransferase LCMT-1, an enzyme required for cell survival. We determined crystal structures of human LCMT-1 in isolation and in complex with PP2A stabilized by a cofactor mimic. The structures show that the LCMT-1 active-site pocket recognizes the carboxyl terminus of PP2A, and, interestingly, the PP2A active site makes extensive contacts to LCMT-1. We demonstrated that activation of the PP2A active site stimulates methylation, suggesting a mechanism for efficient conversion of activated PP2A into substrate-specific holoenzymes, thus minimizing unregulated phosphatase activity or formation of inactive holoenzymes. A dominant-negative LCMT-1 mutant attenuates the cell cycle without causing cell death, likely by inhibiting uncontrolled phosphatase activity. Our studies suggested mechanisms of LCMT-1 in tight control of PP2A function, important for the cell cycle and cell survival.


    Organizational Affiliation

    McArdle Laboratory, Department of Oncology, School of Medicine and Public Health, University of Wisconsin at Madison, Madison, WI 53706, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Leucine carboxyl methyltransferase 1T334Homo sapiensMutation(s): 4 
Gene Names: CGI-68LCMTLCMT1
EC: 2.1.1 (PDB Primary Data), 2.1.1.233 (UniProt)
Find proteins for Q9UIC8 (Homo sapiens)
Explore Q9UIC8 
Go to UniProtKB:  Q9UIC8
NIH Common Fund Data Resources
PHAROS  Q9UIC8
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Serine/threonine-protein phosphatase 2A catalytic subunit alpha isoformC304Homo sapiensMutation(s): 0 
Gene Names: PPP2CA
EC: 3.1.3.16
Find proteins for P67775 (Homo sapiens)
Explore P67775 
Go to UniProtKB:  P67775
NIH Common Fund Data Resources
PHAROS  P67775
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
AN6
Query on AN6

Download CCD File 
C
5'-{[(3S)-3-amino-3-carboxypropyl](ethyl)amino}-5'-deoxyadenosine
C16 H25 N7 O5
GAMUFACDOHMHSZ-OPYVMVOTSA-N
 Ligand Interaction
PEG
Query on PEG

Download CCD File 
T
DI(HYDROXYETHYL)ETHER
C4 H10 O3
MTHSVFCYNBDYFN-UHFFFAOYSA-N
 Ligand Interaction
MN
Query on MN

Download CCD File 
C
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: 0.249 
  • R-Value Work: 0.192 
  • R-Value Observed: 0.195 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 48.802α = 90
b = 65.305β = 90
c = 193.092γ = 90
Software Package:
Software NamePurpose
ADSCdata collection
PHASERphasing
REFMACrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-02-16
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2014-10-08
    Changes: Database references
  • Version 1.3: 2014-10-15
    Changes: Structure summary