1KA1

The PAPase Hal2p complexed with calcium and magnesium ions and reaction substrate: PAP


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.30 Å
  • R-Value Free: 0.169 
  • R-Value Work: 0.133 
  • R-Value Observed: 0.134 

Starting Model: experimental
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Ligand Structure Quality Assessment 


This is version 1.3 of the entry. See complete history


Literature

Structural enzymology of Li(+)-sensitive/Mg(2+)-dependent phosphatases.

Patel, S.Martinez-Ripoll, M.Blundell, T.L.Albert, A.

(2002) J Mol Biol 320: 1087-1094

  • DOI: https://doi.org/10.1016/s0022-2836(02)00564-8
  • Primary Citation of Related Structures:  
    1K9Y, 1KA1

  • PubMed Abstract: 

    Li(+)-sensitive/Mg(2+)-dependent phosphatases have attracted considerable attention since they have been proposed as targets for lithium therapy in the treatment of manic-depressive patients. The members of this enzyme superfamily display low levels of sequence identity while possessing a common fold and active site. Extensive structural and biochemical data demonstrate the direct involvement of two metal ions in catalysis, and show that lithium exerts its inhibitory action by blocking the products at the active site. By exploiting the different inhibitory properties of magnesium and calcium, we have been able to solve the X-ray structures of the Li(+)-sensitive/Mg(2+)-dependent 3'-phosphoadenosine-5'-phosphatase in complex with its substrate and with its products. The structural comparison of these complexes provides a 3D picture of the different stages of the catalytic cycle. This gives new insights into the understanding of the biological function of this group of enzymes and their lithium inhibition, and should assist in the design of improved inhibitors of therapeutic value.


  • Organizational Affiliation

    Department of Biochemistry, University of Cambridge, Cambridge, UK.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Halotolerance protein HAL2357Saccharomyces cerevisiaeMutation(s): 0 
Gene Names: HAL2
EC: 3.1.3.7
UniProt
Find proteins for P32179 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P32179 
Go to UniProtKB:  P32179
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP32179
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.30 Å
  • R-Value Free: 0.169 
  • R-Value Work: 0.133 
  • R-Value Observed: 0.134 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 54.875α = 90
b = 44.968β = 110.72
c = 72.11γ = 90
Software Package:
Software NamePurpose
ADSCdata collection
SCALAdata scaling
REFMACrefinement
CCP4data scaling

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2001-11-07
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2023-08-16
    Changes: Data collection, Database references, Derived calculations, Refinement description