2HNQ | pdb_00002hnq

CRYSTAL STRUCTURE OF HUMAN PROTEIN TYROSINE PHOSPHATASE 1B

• PDB DOI: https://doi.org/10.2210/pdb2HNQ/pdb

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


• Deposited: 1994-09-28 Released: 1994-12-20 
• Deposition Author(s): Barford, D., Flint, A.J., Tonks, N.K.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.85 Å
• R-Value Work: 
  0.197 (Depositor) 
• R-Value Observed: 
  0.197 (Depositor) 

Literature

Crystal structure of human protein tyrosine phosphatase 1B.

Barford, D., Flint, A.J., Tonks, N.K.

(1994) Science 263: 1397-1404

• PubMed: 8128219 
• Primary Citation Related Structures: 
  2HNP, 2HNQ


• PubMed Abstract: 
  

  Protein tyrosine phosphatases (PTPs) constitute a family of receptor-like and cytoplasmic signal transducing enzymes that catalyze the dephosphorylation of phosphotyrosine residues and are characterized by homologous catalytic domains. The crystal structure of a representative member of this family, the 37-kilodalton form (residues 1 to 321) of PTP1B, has been determined at 2.8 A resolution. The enzyme consists of a single domain with the catalytic site located at the base of a shallow cleft. The phosphate recognition site is created from a loop that is located at the amino-terminus of an alpha helix. This site is formed from an 11-residue sequence motif that is diagnostic of PTPs and the dual specificity phosphatases, and that contains the catalytically essential cysteine and arginine residues. The position of the invariant cysteine residue within the phosphate binding site is consistent with its role as a nucleophile in the catalytic reaction. The structure of PTP1B should serve as a model for other members of the PTP family and as a framework for understanding the mechanism of tyrosine dephosphorylation.

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Organizational Affiliation: 
• W.M. Keck Structural Biology Laboratory, Cold Spring Harbor Laboratory, NY 11724.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Macromolecule Content 

• Total Structure Weight: 37.61 kDa 
• Atom Count: 2,275 
• Modeled Residue Count: 278 
• Deposited Residue Count: 321 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
PROTEIN-TYROSINE PHOSPHATASE-1B	A	321	Homo sapiens	Mutation(s): 0  EC: 3.1.3.48
UniProt & NIH Common Fund Data Resources
Find proteins for P18031 (Homo sapiens) Explore P18031  Go to UniProtKB:  P18031
PHAROS:  P18031 GTEx:  ENSG00000196396

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
WO4	B [auth A]	TUNGSTATE(VI)ION O4 W PBYZMCDFOULPGH-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.85 Å
• R-Value Work:  0.197 (Depositor) 
• R-Value Observed: 0.197 (Depositor) 

Space Group: P 3₁ 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 88.2	α = 90
b = 88.2	β = 90
c = 103.9	γ = 120

Software Package:

Software Name	Purpose
X-PLOR	model building
X-PLOR	refinement
X-PLOR	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 1994-12-20 
Deposition Author(s): Barford, D., Flint, A.J., Tonks, N.K.

Revision History  

• Version 1.0: 1994-12-20
  Type: Initial release
  
• Version 1.1: 2008-03-24
  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: 2024-02-14
  Changes: Data collection, Database references, Derived calculations