1PNT

CRYSTAL STRUCTURE OF BOVINE HEART PHOSPHOTYROSYL PHOSPHATASE AT 2.2 ANGSTROMS RESOLUTION


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Work: 0.166 
  • R-Value Observed: 0.166 

wwPDB Validation   3D Report Full Report


This is version 1.6 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

  • DOI: https://doi.org/10.1021/bi00203a006
  • Primary Citation of Related Structures:  
    1PNT

  • 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% 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.


  • Organizational Affiliation

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


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
ACID PHOSPHATASE157Bos taurusMutation(s): 0 
EC: 3.1.3.2 (PDB Primary Data), 3.1.3.48 (UniProt)
UniProt
Find proteins for P11064 (Bos taurus)
Explore P11064 
Go to UniProtKB:  P11064
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP11064
Sequence Annotations
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
PO4
Query on PO4

Download Ideal Coordinates CCD File 
B [auth A]PHOSPHATE ION
O4 P
NBIIXXVUZAFLBC-UHFFFAOYSA-K
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Work: 0.166 
  • R-Value Observed: 0.166 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 95.3α = 90
b = 43.3β = 113.5
c = 41.2γ = 90
Software Package:
Software NamePurpose
X-PLORmodel building
TNTrefinement
X-PLORrefinement
X-PLORphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1995-02-07
    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: Derived calculations, Other
  • Version 1.4: 2019-07-17
    Changes: Data collection, Refinement description
  • Version 1.5: 2019-08-14
    Changes: Data collection, Refinement description
  • Version 1.6: 2024-02-14
    Changes: Data collection, Database references, Derived calculations