3ZV2

Human protein-tyrosine phosphatase 1b C215A, S216A mutant


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Free: 0.268 
  • R-Value Work: 0.207 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Conformation-sensing antibodies stabilize the oxidized form of PTP1B and inhibit its phosphatase activity.

Haque, A.Andersen, J.N.Salmeen, A.Barford, D.Tonks, N.K.

(2011) Cell 147: 185-198

  • DOI: 10.1016/j.cell.2011.08.036

  • PubMed Abstract: 
  • Protein tyrosine phosphatase 1B (PTP1B) plays important roles in downregulation of insulin and leptin signaling and is an established therapeutic target for diabetes and obesity. PTP1B is regulated by reactive oxygen species (ROS) produced in respons ...

    Protein tyrosine phosphatase 1B (PTP1B) plays important roles in downregulation of insulin and leptin signaling and is an established therapeutic target for diabetes and obesity. PTP1B is regulated by reactive oxygen species (ROS) produced in response to various stimuli, including insulin. The reversibly oxidized form of the enzyme (PTP1B-OX) is inactive and undergoes profound conformational changes at the active site. We generated conformation-sensor antibodies, in the form of single-chain variable fragments (scFvs), that stabilize PTP1B-OX and thereby inhibit its phosphatase function. Expression of conformation-sensor scFvs as intracellular antibodies (intrabodies) enhanced insulin-induced tyrosyl phosphorylation of the β subunit of the insulin receptor and its substrate IRS-1 and increased insulin-induced phosphorylation of PKB/AKT. Our data suggest that stabilization of the oxidized, inactive form of PTP1B with appropriate therapeutic molecules may offer a paradigm for phosphatase drug development.


    Organizational Affiliation

    Cold Spring Harbor Laboratory, Cold Spring Harbor, NY 11724, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Tyrosine-protein phosphatase non-receptor type 1
A
320Homo sapiensMutation(s): 2 
Gene Names: PTPN1 (PTP1B)
EC: 3.1.3.48
Find proteins for P18031 (Homo sapiens)
Go to Gene View: PTPN1
Go to UniProtKB:  P18031
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Free: 0.268 
  • R-Value Work: 0.207 
  • Space Group: P 31 2 1
Unit Cell:
Length (Å)Angle (°)
a = 88.450α = 90.00
b = 88.450β = 90.00
c = 103.990γ = 120.00
Software Package:
Software NamePurpose
MOSFLMdata reduction
REFMACrefinement
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-08-31
    Type: Initial release
  • Version 1.1: 2011-10-12
    Type: Database references
  • Version 1.2: 2018-07-25
    Type: Data collection, Database references, Source and taxonomy, Structure summary