Biological Assembly 1  

 3D View: Structure | Electron Density

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

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 38223.51 
• Atom Count: 2298 
• Residue Count: 327 
• Unique protein chains: 1

3EU0

Crystal structure of the S-nitrosylated Cys215 of PTP1B

• DOI: 10.2210/pdb3EU0/pdb

• Classification: HYDROLASE
• Organism(s): Homo sapiens
• Expression System: Escherichia coli


• Deposited: 2008-10-09 Released: 2008-11-11 
• Deposition Author(s): Chu, H.M., Wang, A.H.J., Chen, Y.Y., Pan, K.T., Wang, D.L., Khoo, K.H., Meng, T.C.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.7 Å
• R-Value Free: 0.246 
• R-Value Work: 0.202 

Literature

Cysteine S-Nitrosylation Protects Protein-tyrosine Phosphatase 1B against Oxidation-induced Permanent Inactivation

Chen, Y.Y., Chu, H.M., Pan, K.T., Teng, C.H., Wang, D.L., Wang, A.H., Khoo, K.H., Meng, T.C.

(2008) J.Biol.Chem. 283: 35265-35272

• PubMed: 18840608 
• DOI: 10.1074/jbc.M805287200


• PubMed Abstract: 
  

Protein S-nitrosylation mediated by cellular nitric oxide (NO) plays a primary role in executing biological functions in cGMP-independent NO signaling. Although S-nitrosylation appears similar to Cys oxidation induced by reactive oxygen species, the molecular mechanism and biological consequence remain unclear. We investigated the structural process of S-nitrosylation of protein-tyrosine phosphatase 1B (PTP1B). We treated PTP1B with various NO donors, including S-nitrosothiol reagents and compound-releasing NO radicals, to produce site-specific Cys S-nitrosylation identified using advanced mass spectrometry (MS) techniques. Quantitative MS showed that the active site Cys-215 was the primary residue susceptible to S-nitrosylation. The crystal structure of NO donor-reacted PTP1B at 2.6 A resolution revealed that the S-NO state at Cys-215 had no discernible irreversibly oxidized forms, whereas other Cys residues remained in their free thiol states. We further demonstrated that S-nitrosylation of the Cys-215 residue protected PTP1B from subsequent H(2)O(2)-induced irreversible oxidation. Increasing the level of cellular NO by pretreating cells with an NO donor or by activating ectopically expressed NO synthase inhibited reactive oxygen species-induced irreversible oxidation of endogenous PTP1B. These findings suggest that S-nitrosylation might prevent PTPs from permanent inactivation caused by oxidative stress.

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Organizational Affiliation: 

Institute of Biological Chemistry, National Core Facility for Proteomics Research, Academia Sinica, Taipei 11529, Taiwan.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
Tyrosine-protein phosphatase non-receptor type 1	A	327	Homo sapiens	Mutation(s): 0  Gene Names: PTPN1 (PTP1B) EC: 3.1.3.48
Find proteins for P18031 (Homo sapiens) Go to Gene View: PTPN1 Go to UniProtKB:  P18031

Small Molecules

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
SNC	A	L-PEPTIDE LINKING	C3 H6 N2 O3 S		CYS

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.7 Å
• R-Value Free: 0.246 
• R-Value Work: 0.202 
• Space Group: P 3₁ 2 1

Unit Cell:

Length (Å)	Angle (°)
a = 88.720	α = 90.00
b = 88.720	β = 90.00
c = 104.720	γ = 120.00

Software Package:

Software Name	Purpose
AMoRE	phasing
CrystalClear	data collection
SCALEPACK	data scaling
CNS	refinement
DENZO	data reduction

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2008-10-09 
• Released Date: 2008-11-11 
• Deposition Author(s): Chu, H.M., Wang, A.H.J., Chen, Y.Y., Pan, K.T., Wang, D.L., Khoo, K.H., Meng, T.C.

Revision History 

• Version 1.0: 2008-11-11
  Type: Initial release
• Version 1.1: 2011-07-13
  Type: Version format compliance