4PF9

Crystal structure of insulin degrading enzyme complexed with inhibitor


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.253 
  • R-Value Work: 0.195 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Dual Exosite-binding Inhibitors of Insulin-degrading Enzyme Challenge Its Role as the Primary Mediator of Insulin Clearance in Vivo.

Durham, T.B.Toth, J.L.Klimkowski, V.J.Cao, J.X.Siesky, A.M.Alexander-Chacko, J.Wu, G.Y.Dixon, J.T.McGee, J.E.Wang, Y.Guo, S.Y.Cavitt, R.N.Schindler, J.Thibodeaux, S.J.Calvert, N.A.Coghlan, M.J.Sindelar, D.K.Christe, M.Kiselyov, V.V.Michael, M.D.Sloop, K.W.

(2015) J.Biol.Chem. 290: 20044-20059

  • DOI: 10.1074/jbc.M115.638205
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Insulin-degrading enzyme (IDE, insulysin) is the best characterized catabolic enzyme implicated in proteolysis of insulin. Recently, a peptide inhibitor of IDE has been shown to affect levels of insulin, amylin, and glucagon in vivo. However, IDE(-/- ...

    Insulin-degrading enzyme (IDE, insulysin) is the best characterized catabolic enzyme implicated in proteolysis of insulin. Recently, a peptide inhibitor of IDE has been shown to affect levels of insulin, amylin, and glucagon in vivo. However, IDE(-/-) mice display variable phenotypes relating to fasting plasma insulin levels, glucose tolerance, and insulin sensitivity depending on the cohort and age of animals. Here, we interrogated the importance of IDE-mediated catabolism on insulin clearance in vivo. Using a structure-based design, we linked two newly identified ligands binding at unique IDE exosites together to construct a potent series of novel inhibitors. These compounds do not interact with the catalytic zinc of the protease. Because one of these inhibitors (NTE-1) was determined to have pharmacokinetic properties sufficient to sustain plasma levels >50 times its IDE IC50 value, studies in rodents were conducted. In oral glucose tolerance tests with diet-induced obese mice, NTE-1 treatment improved the glucose excursion. Yet in insulin tolerance tests and euglycemic clamp experiments, NTE-1 did not enhance insulin action or increase plasma insulin levels. Importantly, IDE inhibition with NTE-1 did result in elevated plasma amylin levels, suggesting the in vivo role of IDE action on amylin may be more significant than an effect on insulin. Furthermore, using the inhibitors described in this report, we demonstrate that in HEK cells IDE has little impact on insulin clearance. In total, evidence from our studies supports a minimal role for IDE in insulin metabolism in vivo and suggests IDE may be more important in helping regulate amylin clearance.


    Organizational Affiliation

    From the Discovery Chemistry Research and Technologies, durham_timothy_barrett@lilly.com.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Insulin-degrading enzyme
A, B
989Homo sapiensMutation(s): 14 
Gene Names: IDE
EC: 3.4.24.56
Find proteins for P14735 (Homo sapiens)
Go to Gene View: IDE
Go to UniProtKB:  P14735
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download SDF File 
Download CCD File 
A, B
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
2Q6
Query on 2Q6

Download SDF File 
Download CCD File 
A, B
methyl [(2S)-2-[4-({5-[4-({(2S)-2-[(3S)-3-amino-2-oxopiperidin-1-yl]-2-cyclohexylacetyl}amino)phenyl]pentyl}oxy)phenyl]-3-(quinolin-3-yl)propyl]carbamate
C44 H55 N5 O5
IGRIVAWLJUPVMM-UDEWTJCRSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.253 
  • R-Value Work: 0.195 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 79.254α = 90.00
b = 116.419β = 97.60
c = 124.470γ = 90.00
Software Package:
Software NamePurpose
BUSTERrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2014-04-28 
  • Released Date: 2015-06-17 
  • Deposition Author(s): Wang, Y., Guo, S.

Revision History 

  • Version 1.0: 2015-06-17
    Type: Initial release
  • Version 1.1: 2015-07-08
    Type: Database references
  • Version 1.2: 2015-08-26
    Type: Database references