1PNT

CRYSTAL STRUCTURE OF BOVINE HEART PHOSPHOTYROSYL PHOSPHATASE AT 2.2 ANGSTROMS RESOLUTION


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Work: 0.166 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Crystal structure of bovine heart phosphotyrosyl phosphatase at 2.2-A resolution.

Zhang, M.Van Etten, R.L.Stauffacher, C.V.

(1994) Biochemistry 33: 11097-11105


  • PubMed Abstract: 
  • The first X-ray crystallographic structure of a member of the class of low molecular weight (M(r) 18,000) phosphotyrosyl phosphatases is presented. Bovine heart phosphotyrosyl phosphatase (BHPTP) exemplifies this class and is highly homologous (94% s ...

    The first X-ray crystallographic structure of a member of the class of low molecular weight (M(r) 18,000) phosphotyrosyl phosphatases is presented. Bovine heart phosphotyrosyl phosphatase (BHPTP) exemplifies this class and is highly homologous (94% sequence identity) to an isoenzyme known as red cell acid phosphatase that is present throughout human tissues. The high-resolution (2.2-A) crystal structure of BHPTP shows that the enzyme consists of a four-strand central parallel beta sheet with alpha helices packed on both sides in a manner characteristic of a Rossmann fold. A bound phosphate ion defines the active site location in a loop of the first beta alpha beta motif at the C-terminus of the beta sheet. The location and enzymatic significance of the residues in the characteristic low molecular weight PTPase active site motif, including the essential arginine (Arg 18) and nucleophilic cysteine (Cys 12), are described. The functional role of a histidine (His 72) suggested previously to be near the active site is defined in the structure, as well as a potential proton donor for the leaving group in the tyrosyl phosphate cleavage. Surface maps of BHPTP define a hydrophobic crevice suitable for phosphotyrosyl peptide binding. Comparison of the BHPTP structure to the related, but structurally distinct enzyme PTP1B is made, illustrating the unique way this smallest of these phosphatases has formed the phosphotyrosine active site.


    Related Citations: 
    • Crystallization and Preliminary X-Ray Analysis of the Low Molecular Weight Phosphotyrosyl Protein Phosphatase from Bovine Heart
      Zhang, M.,Van Etten, R.L.,Lawrence, C.M.,Stauffacher, C.V.
      (1994) J.Mol.Biol. 238: 281


    Organizational Affiliation

    Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
ACID PHOSPHATASE
A
157Bos taurusGene Names: ACP1
EC: 3.1.3.48, 3.1.3.2
Find proteins for P11064 (Bos taurus)
Go to Gene View: ACP1
Go to UniProtKB:  P11064
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PO4
Query on PO4

Download SDF File 
Download CCD File 
A
PHOSPHATE ION
O4 P
NBIIXXVUZAFLBC-UHFFFAOYSA-K
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Work: 0.166 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 95.300α = 90.00
b = 43.300β = 113.50
c = 41.200γ = 90.00
Software Package:
Software NamePurpose
X-PLORphasing
X-PLORmodel building
TNTrefinement
X-PLORrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1995-02-07
    Type: Initial release
  • Version 1.1: 2008-03-03
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2017-11-29
    Type: Derived calculations, Other