2HHM

STRUCTURE OF INOSITOL MONOPHOSPHATASE, THE PUTATIVE TARGET OF LITHIUM THERAPY

  • Classification: HYDROLASE
  • Organism(s): Homo sapiens
  • Mutation(s): No 

  • Deposited: 1992-10-20 Released: 1993-10-31 
  • Deposition Author(s): Bone, R.

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Observed: 0.166 

wwPDB Validation   3D Report Full Report


This is version 1.4 of the entry. See complete history


Literature

Structure of inositol monophosphatase, the putative target of lithium therapy.

Bone, R.Springer, J.P.Atack, J.R.

(1992) Proc Natl Acad Sci U S A 89: 10031-10035

  • DOI: https://doi.org/10.1073/pnas.89.21.10031
  • Primary Citation of Related Structures:  
    2HHM

  • PubMed Abstract: 

    Inositol monophosphatase (EC 3.1.3.25), the putative molecular site of action of lithium therapy for manic-depressive illness, plays a key role in the phosphatidylinositol signaling pathway by catalyzing the hydrolysis of inositol monophosphates. To provide a structural basis from which to design better therapeutic agents for manic-depressive illness, the structure of human inositol monophosphatase has been determined to 2.1-A resolution by using x-ray crystallography. The enzyme exists as a dimer of identical subunits, each folded into a five-layered sandwich of three pairs of alpha-helices and two beta-sheets. Sulfate and an inhibitory lanthanide cation (Gd3+) are bound at identical sites on each subunit and establish the positions of the active sites. Each site is located in a large hydrophilic cavern that is at the base of the two central helices where several segments of secondary structure intersect. Comparison of the phosphatase aligned sequences of several diverse genes with the phosphatase structure suggests that the products of these genes and the phosphatase form a structural family with a conserved metal binding site.


  • Organizational Affiliation

    Department of Biophysical Chemistry, Merck Research Laboratories, Rahway, NJ 07065.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
INOSITOL MONOPHOSPHATASE
A, B
276Homo sapiensMutation(s): 0 
EC: 3.1.3.25 (PDB Primary Data), 3.1.3.94 (UniProt)
UniProt & NIH Common Fund Data Resources
Find proteins for P29218 (Homo sapiens)
Explore P29218 
Go to UniProtKB:  P29218
PHAROS:  P29218
GTEx:  ENSG00000133731 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP29218
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Observed: 0.166 
  • Space Group: P 32 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 86.2α = 90
b = 86.2β = 90
c = 154.3γ = 120
Software Package:
Software NamePurpose
PROLSQrefinement

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

  • Released Date: 1993-10-31 
  • Deposition Author(s): Bone, R.

Revision History  (Full details and data files)

  • Version 1.0: 1993-10-31
    Type: Initial release
  • Version 1.1: 2008-03-03
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2017-11-29
    Changes: Advisory, Derived calculations, Other
  • Version 1.4: 2024-02-14
    Changes: Advisory, Data collection, Database references, Derived calculations