5JNR

Crystal structure of human low molecular weight protein tyrosine phosphatase (LMPTP) type A


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.214 
  • R-Value Work: 0.163 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Diabetes reversal by inhibition of the low-molecular-weight tyrosine phosphatase.

Stanford, S.M.Aleshin, A.E.Zhang, V.Ardecky, R.J.Hedrick, M.P.Zou, J.Ganji, S.R.Bliss, M.R.Yamamoto, F.Bobkov, A.A.Kiselar, J.Liu, Y.Cadwell, G.W.Khare, S.Yu, J.Barquilla, A.Chung, T.D.Y.Mustelin, T.Schenk, S.Bankston, L.A.Liddington, R.C.Pinkerton, A.B.Bottini, N.

(2017) Nat. Chem. Biol. 13: 624-632

  • DOI: 10.1038/nchembio.2344
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Obesity-associated insulin resistance plays a central role in type 2 diabetes. As such, tyrosine phosphatases that dephosphorylate the insulin receptor (IR) are potential therapeutic targets. The low-molecular-weight protein tyrosine phosphatase (LMP ...

    Obesity-associated insulin resistance plays a central role in type 2 diabetes. As such, tyrosine phosphatases that dephosphorylate the insulin receptor (IR) are potential therapeutic targets. The low-molecular-weight protein tyrosine phosphatase (LMPTP) is a proposed IR phosphatase, yet its role in insulin signaling in vivo has not been defined. Here we show that global and liver-specific LMPTP deletion protects mice from high-fat diet-induced diabetes without affecting body weight. To examine the role of the catalytic activity of LMPTP, we developed a small-molecule inhibitor with a novel uncompetitive mechanism, a unique binding site at the opening of the catalytic pocket, and an exquisite selectivity over other phosphatases. This inhibitor is orally bioavailable, and it increases liver IR phosphorylation in vivo and reverses high-fat diet-induced diabetes. Our findings suggest that LMPTP is a key promoter of insulin resistance and that LMPTP inhibitors would be beneficial for treating type 2 diabetes.


    Organizational Affiliation

    Division of Cellular Biology, La Jolla Institute for Allergy and Immunology, La Jolla, California, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Low molecular weight phosphotyrosine protein phosphatase
A
160Homo sapiensMutation(s): 0 
Gene Names: ACP1
EC: 3.1.3.48
Find proteins for P24666 (Homo sapiens)
Go to Gene View: ACP1
Go to UniProtKB:  P24666
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.214 
  • R-Value Work: 0.163 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 32.404α = 90.00
b = 55.863β = 90.00
c = 96.457γ = 90.00
Software Package:
Software NamePurpose
Aimlessdata scaling
PDB_EXTRACTdata extraction
XDSdata reduction
REFMACrefinement
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of Diabetes and Digestive and Kidney DiseaseUnited StatesR01DK106233

Revision History 

  • Version 1.0: 2017-03-29
    Type: Initial release
  • Version 1.1: 2017-04-12
    Type: Database references
  • Version 1.2: 2017-05-24
    Type: Database references
  • Version 1.3: 2017-09-20
    Type: Author supporting evidence