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 

wwPDB Validation   3D Report Full Report


This is version 1.2 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: 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 ...

    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)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Halotolerance protein HAL2A357Saccharomyces cerevisiaeMutation(s): 0 
Gene Names: HAL2
EC: 3.1.3.7
Find proteins for P32179 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P32179 
Go to UniProtKB:  P32179
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
A3P
Query on A3P

Download Ideal Coordinates CCD File 
D [auth A]ADENOSINE-3'-5'-DIPHOSPHATE
C10 H15 N5 O10 P2
WHTCPDAXWFLDIH-KQYNXXCUSA-N
 Ligand Interaction
BME
Query on BME

Download Ideal Coordinates CCD File 
E [auth A]BETA-MERCAPTOETHANOL
C2 H6 O S
DGVVWUTYPXICAM-UHFFFAOYSA-N
 Ligand Interaction
CA
Query on CA

Download Ideal Coordinates CCD File 
B [auth A]CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
MG
Query on MG

Download Ideal Coordinates CCD File 
C [auth A]MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
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

View Full Validation Report



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