6Z6A

Keap1 macrocycle complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.37 Å
  • R-Value Free: 0.209 
  • R-Value Work: 0.192 
  • R-Value Observed: 0.193 

wwPDB Validation   3D Report Full Report


Ligand Structure Quality Assessment 


This is version 2.1 of the entry. See complete history


Literature

Mining Natural Products for Macrocycles to Drug Difficult Targets.

Begnini, F.Poongavanam, V.Over, B.Castaldo, M.Geschwindner, S.Johansson, P.Tyagi, M.Tyrchan, C.Wissler, L.Sjo, P.Schiesser, S.Kihlberg, J.

(2021) J Med Chem 64: 1054-1072

  • DOI: https://doi.org/10.1021/acs.jmedchem.0c01569
  • Primary Citation of Related Structures:  
    6Z6A

  • PubMed Abstract: 

    Lead generation for difficult-to-drug targets that have large, featureless, and highly lipophilic or highly polar and/or flexible binding sites is highly challenging. Here, we describe how cores of macrocyclic natural products can serve as a high-quality in silico screening library that provides leads for difficult-to-drug targets. Two iterative rounds of docking of a carefully selected set of natural-product-derived cores led to the discovery of an uncharged macrocyclic inhibitor of the Keap1-Nrf2 protein-protein interaction, a particularly challenging target due to its highly polar binding site. The inhibitor displays cellular efficacy and is well-positioned for further optimization based on the structure of its complex with Keap1 and synthetic access. We believe that our work will spur interest in using macrocyclic cores for in silico -based lead generation and also inspire the design of future macrocycle screening collections.


  • Organizational Affiliation

    Department of Chemistry - BMC, Uppsala University, Box 576, 75123 Uppsala, Sweden.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Kelch-like ECH-associated protein 1
A, B
295Homo sapiensMutation(s): 0 
Gene Names: KEAP1INRF2KIAA0132KLHL19
UniProt & NIH Common Fund Data Resources
Find proteins for Q14145 (Homo sapiens)
Explore Q14145 
Go to UniProtKB:  Q14145
PHAROS:  Q14145
GTEx:  ENSG00000079999 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ14145
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Q9E (Subject of Investigation/LOI)
Query on Q9E

Download Ideal Coordinates CCD File 
C [auth A](5S,8R)-8-[[(2S)-1-ethanoylpyrrolidin-2-yl]carbonylamino]-N,N-dimethyl-7,11-bis(oxidanylidene)-10-oxa-3-thia-6-azabicyclo[10.4.0]hexadeca-1(16),12,14-triene-5-carboxamide
C23 H30 N4 O6 S
URYMNBQTISFUDY-QRVBRYPASA-N
CL
Query on CL

Download Ideal Coordinates CCD File 
E [auth A]CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
NA
Query on NA

Download Ideal Coordinates CCD File 
D [auth A]SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
Binding Affinity Annotations 
IDSourceBinding Affinity
Q9E Binding MOAD:  6Z6A Kd: 3700 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.37 Å
  • R-Value Free: 0.209 
  • R-Value Work: 0.192 
  • R-Value Observed: 0.193 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 75.65α = 90
b = 75.8β = 90
c = 203.13γ = 90
Software Package:
Software NamePurpose
XDSdata reduction
Aimlessdata scaling
PHASERphasing
BUSTERrefinement
PDB_EXTRACTdata extraction

Structure Validation

View Full Validation Report



Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2020-12-30
    Type: Initial release
  • Version 1.1: 2021-02-10
    Changes: Database references
  • Version 2.0: 2021-02-17
    Changes: Derived calculations, Non-polymer description, Source and taxonomy, Structure summary
  • Version 2.1: 2024-01-24
    Changes: Data collection, Database references, Refinement description